| 1 | /* |
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| 2 | ----------------------------------------------------------------------------- |
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| 3 | This source file is part of OGRE |
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| 4 | (Object-oriented Graphics Rendering Engine) |
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| 5 | For the latest info, see http://www.ogre3d.org |
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| 6 | |
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| 7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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| 8 | Also see acknowledgements in Readme.html |
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| 9 | |
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| 10 | This program is free software; you can redistribute it and/or modify it under |
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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| 12 | Foundation; either version 2 of the License, or (at your option) any later |
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| 13 | version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with |
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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| 22 | http://www.gnu.org/copyleft/lesser.txt. |
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| 23 | |
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| 24 | You may alternatively use this source under the terms of a specific version of |
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| 25 | the OGRE Unrestricted License provided you have obtained such a license from |
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| 26 | Torus Knot Software Ltd. |
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| 27 | ----------------------------------------------------------------------------- |
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| 28 | */ |
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| 29 | #include "OgreStableHeaders.h" |
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| 30 | #include "OgreCamera.h" |
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| 31 | |
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| 32 | #include "OgreMath.h" |
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| 33 | #include "OgreMatrix3.h" |
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| 34 | #include "OgreSceneManager.h" |
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| 35 | #include "OgreSceneNode.h" |
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| 36 | #include "OgreAxisAlignedBox.h" |
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| 37 | #include "OgreSphere.h" |
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| 38 | #include "OgreLogManager.h" |
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| 39 | #include "OgreException.h" |
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| 40 | #include "OgreRoot.h" |
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| 41 | #include "OgreRenderSystem.h" |
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| 42 | |
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| 43 | namespace Ogre { |
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| 44 | |
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| 45 | String Camera::msMovableType = "Camera"; |
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| 46 | //----------------------------------------------------------------------- |
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| 47 | Camera::Camera( const String& name, SceneManager* sm) |
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| 48 | : mName( name ), |
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| 49 | mSceneMgr(sm), |
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| 50 | mOrientation(Quaternion::IDENTITY), |
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| 51 | mPosition(Vector3::ZERO), |
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| 52 | mSceneDetail(PM_SOLID), |
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| 53 | mAutoTrackTarget(0), |
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| 54 | mAutoTrackOffset(Vector3::ZERO), |
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| 55 | mSceneLodFactor(1.0f), |
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| 56 | mSceneLodFactorInv(1.0f), |
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| 57 | mWindowSet(false), |
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| 58 | mLastViewport(0), |
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| 59 | mAutoAspectRatio(false), |
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| 60 | mCullFrustum(0), |
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| 61 | mUseRenderingDistance(true) |
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| 62 | |
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| 63 | { |
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| 64 | |
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| 65 | // Reasonable defaults to camera params |
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| 66 | mFOVy = Radian(Math::PI/4.0); |
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| 67 | mNearDist = 100.0f; |
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| 68 | mFarDist = 100000.0f; |
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| 69 | mAspect = 1.33333333333333f; |
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| 70 | mProjType = PT_PERSPECTIVE; |
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| 71 | setFixedYawAxis(true); // Default to fixed yaw, like freelook since most people expect this |
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| 72 | |
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| 73 | invalidateFrustum(); |
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| 74 | invalidateView(); |
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| 75 | |
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| 76 | // Init matrices |
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| 77 | mViewMatrix = Matrix4::ZERO; |
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| 78 | mProjMatrixRS = Matrix4::ZERO; |
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| 79 | |
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| 80 | mParentNode = 0; |
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| 81 | |
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| 82 | // no reflection |
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| 83 | mReflect = false; |
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| 84 | |
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| 85 | mVisible = false; |
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| 86 | |
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| 87 | } |
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| 88 | |
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| 89 | //----------------------------------------------------------------------- |
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| 90 | Camera::~Camera() |
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| 91 | { |
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| 92 | // Do nothing |
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| 93 | } |
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| 94 | |
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| 95 | //----------------------------------------------------------------------- |
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| 96 | SceneManager* Camera::getSceneManager(void) const |
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| 97 | { |
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| 98 | return mSceneMgr; |
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| 99 | } |
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| 100 | //----------------------------------------------------------------------- |
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| 101 | const String& Camera::getName(void) const |
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| 102 | { |
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| 103 | return mName; |
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| 104 | } |
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| 105 | |
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| 106 | |
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| 107 | //----------------------------------------------------------------------- |
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| 108 | void Camera::setPolygonMode(PolygonMode sd) |
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| 109 | { |
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| 110 | mSceneDetail = sd; |
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| 111 | } |
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| 112 | |
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| 113 | //----------------------------------------------------------------------- |
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| 114 | PolygonMode Camera::getPolygonMode(void) const |
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| 115 | { |
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| 116 | return mSceneDetail; |
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| 117 | } |
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| 118 | |
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| 119 | //----------------------------------------------------------------------- |
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| 120 | void Camera::setPosition(Real x, Real y, Real z) |
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| 121 | { |
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| 122 | mPosition.x = x; |
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| 123 | mPosition.y = y; |
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| 124 | mPosition.z = z; |
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| 125 | invalidateView(); |
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| 126 | } |
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| 127 | |
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| 128 | //----------------------------------------------------------------------- |
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| 129 | void Camera::setPosition(const Vector3& vec) |
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| 130 | { |
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| 131 | mPosition = vec; |
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| 132 | invalidateView(); |
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| 133 | } |
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| 134 | |
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| 135 | //----------------------------------------------------------------------- |
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| 136 | const Vector3& Camera::getPosition(void) const |
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| 137 | { |
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| 138 | return mPosition; |
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| 139 | } |
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| 140 | |
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| 141 | //----------------------------------------------------------------------- |
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| 142 | void Camera::move(const Vector3& vec) |
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| 143 | { |
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| 144 | mPosition = mPosition + vec; |
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| 145 | invalidateView(); |
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| 146 | } |
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| 147 | |
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| 148 | //----------------------------------------------------------------------- |
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| 149 | void Camera::moveRelative(const Vector3& vec) |
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| 150 | { |
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| 151 | // Transform the axes of the relative vector by camera's local axes |
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| 152 | Vector3 trans = mOrientation * vec; |
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| 153 | |
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| 154 | mPosition = mPosition + trans; |
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| 155 | invalidateView(); |
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| 156 | } |
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| 157 | |
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| 158 | //----------------------------------------------------------------------- |
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| 159 | void Camera::setDirection(Real x, Real y, Real z) |
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| 160 | { |
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| 161 | setDirection(Vector3(x,y,z)); |
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| 162 | } |
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| 163 | |
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| 164 | //----------------------------------------------------------------------- |
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| 165 | void Camera::setDirection(const Vector3& vec) |
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| 166 | { |
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| 167 | // Do nothing if given a zero vector |
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| 168 | // (Replaced assert since this could happen with auto tracking camera and |
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| 169 | // camera passes through the lookAt point) |
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| 170 | if (vec == Vector3::ZERO) return; |
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| 171 | |
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| 172 | // Remember, camera points down -Z of local axes! |
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| 173 | // Therefore reverse direction of direction vector before determining local Z |
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| 174 | Vector3 zAdjustVec = -vec; |
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| 175 | zAdjustVec.normalise(); |
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| 176 | |
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| 177 | |
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| 178 | if( mYawFixed ) |
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| 179 | { |
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| 180 | Vector3 xVec = mYawFixedAxis.crossProduct( zAdjustVec ); |
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| 181 | xVec.normalise(); |
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| 182 | |
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| 183 | Vector3 yVec = zAdjustVec.crossProduct( xVec ); |
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| 184 | yVec.normalise(); |
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| 185 | |
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| 186 | mOrientation.FromAxes( xVec, yVec, zAdjustVec ); |
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| 187 | } |
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| 188 | else |
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| 189 | { |
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| 190 | |
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| 191 | // Get axes from current quaternion |
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| 192 | Vector3 axes[3]; |
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| 193 | updateView(); |
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| 194 | mRealOrientation.ToAxes(axes); |
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| 195 | Quaternion rotQuat; |
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| 196 | if ( (axes[2]+zAdjustVec).squaredLength() < 0.00005f) |
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| 197 | { |
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| 198 | // Oops, a 180 degree turn (infinite possible rotation axes) |
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| 199 | // Default to yaw i.e. use current UP |
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| 200 | rotQuat.FromAngleAxis(Radian(Math::PI), axes[1]); |
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| 201 | } |
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| 202 | else |
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| 203 | { |
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| 204 | // Derive shortest arc to new direction |
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| 205 | rotQuat = axes[2].getRotationTo(zAdjustVec); |
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| 206 | |
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| 207 | } |
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| 208 | mOrientation = rotQuat * mOrientation; |
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| 209 | } |
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| 210 | |
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| 211 | // transform to parent space |
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| 212 | if (mParentNode) |
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| 213 | { |
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| 214 | mOrientation = |
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| 215 | mParentNode->_getDerivedOrientation().Inverse() * mOrientation; |
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| 216 | } |
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| 217 | |
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| 218 | // TODO If we have a fixed yaw axis, we mustn't break it by using the |
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| 219 | // shortest arc because this will sometimes cause a relative yaw |
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| 220 | // which will tip the camera |
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| 221 | |
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| 222 | invalidateView(); |
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| 223 | |
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| 224 | } |
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| 225 | |
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| 226 | //----------------------------------------------------------------------- |
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| 227 | Vector3 Camera::getDirection(void) const |
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| 228 | { |
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| 229 | // Direction points down -Z by default |
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| 230 | return mOrientation * -Vector3::UNIT_Z; |
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| 231 | } |
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| 232 | |
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| 233 | //----------------------------------------------------------------------- |
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| 234 | Vector3 Camera::getUp(void) const |
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| 235 | { |
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| 236 | return mOrientation * Vector3::UNIT_Y; |
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| 237 | } |
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| 238 | |
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| 239 | //----------------------------------------------------------------------- |
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| 240 | Vector3 Camera::getRight(void) const |
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| 241 | { |
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| 242 | return mOrientation * Vector3::UNIT_X; |
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| 243 | } |
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| 244 | |
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| 245 | //----------------------------------------------------------------------- |
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| 246 | void Camera::lookAt(const Vector3& targetPoint) |
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| 247 | { |
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| 248 | updateView(); |
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| 249 | this->setDirection(targetPoint - mRealPosition); |
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| 250 | } |
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| 251 | |
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| 252 | //----------------------------------------------------------------------- |
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| 253 | void Camera::lookAt( Real x, Real y, Real z ) |
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| 254 | { |
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| 255 | Vector3 vTemp( x, y, z ); |
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| 256 | this->lookAt(vTemp); |
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| 257 | } |
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| 258 | |
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| 259 | //----------------------------------------------------------------------- |
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| 260 | void Camera::roll(const Radian& angle) |
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| 261 | { |
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| 262 | // Rotate around local Z axis |
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| 263 | Vector3 zAxis = mOrientation * Vector3::UNIT_Z; |
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| 264 | rotate(zAxis, angle); |
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| 265 | |
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| 266 | invalidateView(); |
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| 267 | } |
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| 268 | |
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| 269 | //----------------------------------------------------------------------- |
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| 270 | void Camera::yaw(const Radian& angle) |
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| 271 | { |
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| 272 | Vector3 yAxis; |
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| 273 | |
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| 274 | if (mYawFixed) |
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| 275 | { |
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| 276 | // Rotate around fixed yaw axis |
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| 277 | yAxis = mYawFixedAxis; |
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| 278 | } |
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| 279 | else |
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| 280 | { |
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| 281 | // Rotate around local Y axis |
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| 282 | yAxis = mOrientation * Vector3::UNIT_Y; |
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| 283 | } |
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| 284 | |
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| 285 | rotate(yAxis, angle); |
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| 286 | |
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| 287 | invalidateView(); |
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| 288 | } |
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| 289 | |
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| 290 | //----------------------------------------------------------------------- |
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| 291 | void Camera::pitch(const Radian& angle) |
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| 292 | { |
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| 293 | // Rotate around local X axis |
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| 294 | Vector3 xAxis = mOrientation * Vector3::UNIT_X; |
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| 295 | rotate(xAxis, angle); |
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| 296 | |
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| 297 | invalidateView(); |
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| 298 | |
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| 299 | } |
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| 300 | |
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| 301 | //----------------------------------------------------------------------- |
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| 302 | void Camera::rotate(const Vector3& axis, const Radian& angle) |
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| 303 | { |
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| 304 | Quaternion q; |
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| 305 | q.FromAngleAxis(angle,axis); |
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| 306 | rotate(q); |
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| 307 | } |
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| 308 | |
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| 309 | //----------------------------------------------------------------------- |
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| 310 | void Camera::rotate(const Quaternion& q) |
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| 311 | { |
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| 312 | // Note the order of the mult, i.e. q comes after |
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| 313 | mOrientation = q * mOrientation; |
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| 314 | invalidateView(); |
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| 315 | |
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| 316 | } |
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| 317 | |
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| 318 | //----------------------------------------------------------------------- |
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| 319 | bool Camera::isViewOutOfDate(void) const |
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| 320 | { |
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| 321 | // Overridden from Frustum to use local orientation / position offsets |
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| 322 | // Attached to node? |
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| 323 | if (mParentNode != 0) |
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| 324 | { |
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| 325 | if (mRecalcView || |
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| 326 | mParentNode->_getDerivedOrientation() != mLastParentOrientation || |
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| 327 | mParentNode->_getDerivedPosition() != mLastParentPosition) |
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| 328 | { |
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| 329 | // Ok, we're out of date with SceneNode we're attached to |
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| 330 | mLastParentOrientation = mParentNode->_getDerivedOrientation(); |
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| 331 | mLastParentPosition = mParentNode->_getDerivedPosition(); |
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| 332 | mRealOrientation = mLastParentOrientation * mOrientation; |
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| 333 | mRealPosition = (mLastParentOrientation * mPosition) + mLastParentPosition; |
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| 334 | mRecalcView = true; |
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| 335 | mRecalcWindow = true; |
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| 336 | } |
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| 337 | } |
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| 338 | else |
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| 339 | { |
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| 340 | // Rely on own updates |
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| 341 | mRealOrientation = mOrientation; |
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| 342 | mRealPosition = mPosition; |
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| 343 | } |
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| 344 | |
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| 345 | // Deriving reflection from linked plane? |
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| 346 | if (mReflect && mLinkedReflectPlane && |
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| 347 | !(mLastLinkedReflectionPlane == mLinkedReflectPlane->_getDerivedPlane())) |
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| 348 | { |
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| 349 | mReflectPlane = mLinkedReflectPlane->_getDerivedPlane(); |
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| 350 | mReflectMatrix = Math::buildReflectionMatrix(mReflectPlane); |
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| 351 | mLastLinkedReflectionPlane = mLinkedReflectPlane->_getDerivedPlane(); |
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| 352 | mRecalcView = true; |
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| 353 | mRecalcWindow = true; |
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| 354 | } |
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| 355 | |
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| 356 | // Deriving reflected orientation / position |
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| 357 | if (mRecalcView) |
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| 358 | { |
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| 359 | if (mReflect) |
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| 360 | { |
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| 361 | // Calculate reflected orientation, use up-vector as fallback axis. |
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| 362 | Vector3 dir = mRealOrientation * Vector3::NEGATIVE_UNIT_Z; |
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| 363 | Vector3 rdir = dir.reflect(mReflectPlane.normal); |
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| 364 | Vector3 up = mRealOrientation * Vector3::UNIT_Y; |
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| 365 | mDerivedOrientation = dir.getRotationTo(rdir, up) * mRealOrientation; |
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| 366 | |
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| 367 | // Calculate reflected position. |
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| 368 | mDerivedPosition = mReflectMatrix.transformAffine(mRealPosition); |
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| 369 | } |
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| 370 | else |
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| 371 | { |
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| 372 | mDerivedOrientation = mRealOrientation; |
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| 373 | mDerivedPosition = mRealPosition; |
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| 374 | } |
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| 375 | } |
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| 376 | |
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| 377 | return mRecalcView; |
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| 378 | |
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| 379 | } |
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| 380 | |
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| 381 | // ------------------------------------------------------------------- |
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| 382 | void Camera::invalidateView() const |
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| 383 | { |
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| 384 | mRecalcWindow = true; |
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| 385 | Frustum::invalidateView(); |
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| 386 | } |
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| 387 | // ------------------------------------------------------------------- |
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| 388 | void Camera::invalidateFrustum(void) const |
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| 389 | { |
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| 390 | mRecalcWindow = true; |
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| 391 | Frustum::invalidateFrustum(); |
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| 392 | } |
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| 393 | //----------------------------------------------------------------------- |
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| 394 | void Camera::_renderScene(Viewport *vp, bool includeOverlays) |
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| 395 | { |
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| 396 | |
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| 397 | mSceneMgr->_renderScene(this, vp, includeOverlays); |
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| 398 | } |
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| 399 | |
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| 400 | |
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| 401 | //----------------------------------------------------------------------- |
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| 402 | std::ostream& operator<<( std::ostream& o, const Camera& c ) |
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| 403 | { |
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| 404 | o << "Camera(Name='" << c.mName << "', pos=" << c.mPosition; |
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| 405 | Vector3 dir(c.mOrientation*Vector3(0,0,-1)); |
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| 406 | o << ", direction=" << dir << ",near=" << c.mNearDist; |
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| 407 | o << ", far=" << c.mFarDist << ", FOVy=" << c.mFOVy.valueDegrees(); |
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| 408 | o << ", aspect=" << c.mAspect << ", "; |
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| 409 | o << ", xoffset=" << c.mFrustumOffset.x << ", yoffset=" << c.mFrustumOffset.y; |
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| 410 | o << ", focalLength=" << c.mFocalLength << ", "; |
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| 411 | o << "NearFrustumPlane=" << c.mFrustumPlanes[FRUSTUM_PLANE_NEAR] << ", "; |
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| 412 | o << "FarFrustumPlane=" << c.mFrustumPlanes[FRUSTUM_PLANE_FAR] << ", "; |
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| 413 | o << "LeftFrustumPlane=" << c.mFrustumPlanes[FRUSTUM_PLANE_LEFT] << ", "; |
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| 414 | o << "RightFrustumPlane=" << c.mFrustumPlanes[FRUSTUM_PLANE_RIGHT] << ", "; |
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| 415 | o << "TopFrustumPlane=" << c.mFrustumPlanes[FRUSTUM_PLANE_TOP] << ", "; |
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| 416 | o << "BottomFrustumPlane=" << c.mFrustumPlanes[FRUSTUM_PLANE_BOTTOM]; |
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| 417 | o << ")"; |
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| 418 | |
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| 419 | return o; |
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| 420 | } |
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| 421 | |
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| 422 | //----------------------------------------------------------------------- |
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| 423 | void Camera::setFixedYawAxis(bool useFixed, const Vector3& fixedAxis) |
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| 424 | { |
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| 425 | mYawFixed = useFixed; |
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| 426 | mYawFixedAxis = fixedAxis; |
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| 427 | } |
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| 428 | |
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| 429 | //----------------------------------------------------------------------- |
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| 430 | void Camera::_notifyRenderedFaces(unsigned int numfaces) |
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| 431 | { |
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| 432 | mVisFacesLastRender = numfaces; |
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| 433 | } |
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| 434 | |
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| 435 | //----------------------------------------------------------------------- |
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| 436 | void Camera::_notifyRenderedBatches(unsigned int numbatches) |
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| 437 | { |
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| 438 | mVisBatchesLastRender = numbatches; |
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| 439 | } |
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| 440 | |
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| 441 | //----------------------------------------------------------------------- |
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| 442 | unsigned int Camera::_getNumRenderedFaces(void) const |
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| 443 | { |
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| 444 | return mVisFacesLastRender; |
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| 445 | } |
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| 446 | //----------------------------------------------------------------------- |
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| 447 | unsigned int Camera::_getNumRenderedBatches(void) const |
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| 448 | { |
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| 449 | return mVisBatchesLastRender; |
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| 450 | } |
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| 451 | //----------------------------------------------------------------------- |
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| 452 | const Quaternion& Camera::getOrientation(void) const |
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| 453 | { |
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| 454 | return mOrientation; |
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| 455 | } |
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| 456 | |
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| 457 | //----------------------------------------------------------------------- |
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| 458 | void Camera::setOrientation(const Quaternion& q) |
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| 459 | { |
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| 460 | mOrientation = q; |
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| 461 | invalidateView(); |
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| 462 | } |
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| 463 | //----------------------------------------------------------------------- |
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| 464 | const Quaternion& Camera::getDerivedOrientation(void) const |
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| 465 | { |
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| 466 | updateView(); |
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| 467 | return mDerivedOrientation; |
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| 468 | } |
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| 469 | //----------------------------------------------------------------------- |
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| 470 | const Vector3& Camera::getDerivedPosition(void) const |
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| 471 | { |
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| 472 | updateView(); |
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| 473 | return mDerivedPosition; |
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| 474 | } |
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| 475 | //----------------------------------------------------------------------- |
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| 476 | Vector3 Camera::getDerivedDirection(void) const |
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| 477 | { |
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| 478 | // Direction points down -Z |
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| 479 | updateView(); |
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| 480 | return mDerivedOrientation * Vector3::NEGATIVE_UNIT_Z; |
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| 481 | } |
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| 482 | //----------------------------------------------------------------------- |
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| 483 | Vector3 Camera::getDerivedUp(void) const |
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| 484 | { |
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| 485 | updateView(); |
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| 486 | return mDerivedOrientation * Vector3::UNIT_Y; |
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| 487 | } |
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| 488 | //----------------------------------------------------------------------- |
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| 489 | Vector3 Camera::getDerivedRight(void) const |
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| 490 | { |
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| 491 | updateView(); |
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| 492 | return mDerivedOrientation * Vector3::UNIT_X; |
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| 493 | } |
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| 494 | //----------------------------------------------------------------------- |
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| 495 | const Quaternion& Camera::getRealOrientation(void) const |
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| 496 | { |
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| 497 | updateView(); |
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| 498 | return mRealOrientation; |
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| 499 | } |
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| 500 | //----------------------------------------------------------------------- |
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| 501 | const Vector3& Camera::getRealPosition(void) const |
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| 502 | { |
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| 503 | updateView(); |
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| 504 | return mRealPosition; |
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| 505 | } |
|---|
| 506 | //----------------------------------------------------------------------- |
|---|
| 507 | Vector3 Camera::getRealDirection(void) const |
|---|
| 508 | { |
|---|
| 509 | // Direction points down -Z |
|---|
| 510 | updateView(); |
|---|
| 511 | return mRealOrientation * Vector3::NEGATIVE_UNIT_Z; |
|---|
| 512 | } |
|---|
| 513 | //----------------------------------------------------------------------- |
|---|
| 514 | Vector3 Camera::getRealUp(void) const |
|---|
| 515 | { |
|---|
| 516 | updateView(); |
|---|
| 517 | return mRealOrientation * Vector3::UNIT_Y; |
|---|
| 518 | } |
|---|
| 519 | //----------------------------------------------------------------------- |
|---|
| 520 | Vector3 Camera::getRealRight(void) const |
|---|
| 521 | { |
|---|
| 522 | updateView(); |
|---|
| 523 | return mRealOrientation * Vector3::UNIT_X; |
|---|
| 524 | } |
|---|
| 525 | //----------------------------------------------------------------------- |
|---|
| 526 | const String& Camera::getMovableType(void) const |
|---|
| 527 | { |
|---|
| 528 | return msMovableType; |
|---|
| 529 | } |
|---|
| 530 | //----------------------------------------------------------------------- |
|---|
| 531 | void Camera::setAutoTracking(bool enabled, SceneNode* target, |
|---|
| 532 | const Vector3& offset) |
|---|
| 533 | { |
|---|
| 534 | if (enabled) |
|---|
| 535 | { |
|---|
| 536 | assert (target != 0 && "target cannot be a null pointer if tracking is enabled"); |
|---|
| 537 | mAutoTrackTarget = target; |
|---|
| 538 | mAutoTrackOffset = offset; |
|---|
| 539 | } |
|---|
| 540 | else |
|---|
| 541 | { |
|---|
| 542 | mAutoTrackTarget = 0; |
|---|
| 543 | } |
|---|
| 544 | } |
|---|
| 545 | //----------------------------------------------------------------------- |
|---|
| 546 | void Camera::_autoTrack(void) |
|---|
| 547 | { |
|---|
| 548 | // NB assumes that all scene nodes have been updated |
|---|
| 549 | if (mAutoTrackTarget) |
|---|
| 550 | { |
|---|
| 551 | lookAt(mAutoTrackTarget->_getDerivedPosition() + mAutoTrackOffset); |
|---|
| 552 | } |
|---|
| 553 | } |
|---|
| 554 | //----------------------------------------------------------------------- |
|---|
| 555 | void Camera::setLodBias(Real factor) |
|---|
| 556 | { |
|---|
| 557 | assert(factor > 0.0f && "Bias factor must be > 0!"); |
|---|
| 558 | mSceneLodFactor = factor; |
|---|
| 559 | mSceneLodFactorInv = 1.0f / factor; |
|---|
| 560 | } |
|---|
| 561 | //----------------------------------------------------------------------- |
|---|
| 562 | Real Camera::getLodBias(void) const |
|---|
| 563 | { |
|---|
| 564 | return mSceneLodFactor; |
|---|
| 565 | } |
|---|
| 566 | //----------------------------------------------------------------------- |
|---|
| 567 | Real Camera::_getLodBiasInverse(void) const |
|---|
| 568 | { |
|---|
| 569 | return mSceneLodFactorInv; |
|---|
| 570 | } |
|---|
| 571 | //----------------------------------------------------------------------- |
|---|
| 572 | Ray Camera::getCameraToViewportRay(Real screenX, Real screenY) const |
|---|
| 573 | { |
|---|
| 574 | Matrix4 inverseVP = (getProjectionMatrix() * getViewMatrix(true)).inverse(); |
|---|
| 575 | |
|---|
| 576 | Real nx = (2.0f * screenX) - 1.0f; |
|---|
| 577 | Real ny = 1.0f - (2.0f * screenY); |
|---|
| 578 | Vector3 nearPoint(nx, ny, -1.f); |
|---|
| 579 | // Use midPoint rather than far point to avoid issues with infinite projection |
|---|
| 580 | Vector3 midPoint (nx, ny, 0.0f); |
|---|
| 581 | |
|---|
| 582 | // Get ray origin and ray target on near plane in world space |
|---|
| 583 | Vector3 rayOrigin, rayTarget; |
|---|
| 584 | |
|---|
| 585 | rayOrigin = inverseVP * nearPoint; |
|---|
| 586 | rayTarget = inverseVP * midPoint; |
|---|
| 587 | |
|---|
| 588 | Vector3 rayDirection = rayTarget - rayOrigin; |
|---|
| 589 | rayDirection.normalise(); |
|---|
| 590 | |
|---|
| 591 | return Ray(rayOrigin, rayDirection); |
|---|
| 592 | } |
|---|
| 593 | |
|---|
| 594 | // ------------------------------------------------------------------- |
|---|
| 595 | void Camera::setWindow (Real Left, Real Top, Real Right, Real Bottom) |
|---|
| 596 | { |
|---|
| 597 | mWLeft = Left; |
|---|
| 598 | mWTop = Top; |
|---|
| 599 | mWRight = Right; |
|---|
| 600 | mWBottom = Bottom; |
|---|
| 601 | |
|---|
| 602 | mWindowSet = true; |
|---|
| 603 | mRecalcWindow = true; |
|---|
| 604 | } |
|---|
| 605 | // ------------------------------------------------------------------- |
|---|
| 606 | void Camera::resetWindow () |
|---|
| 607 | { |
|---|
| 608 | mWindowSet = false; |
|---|
| 609 | } |
|---|
| 610 | // ------------------------------------------------------------------- |
|---|
| 611 | void Camera::setWindowImpl() const |
|---|
| 612 | { |
|---|
| 613 | if (!mWindowSet || !mRecalcWindow) |
|---|
| 614 | return; |
|---|
| 615 | |
|---|
| 616 | // Calculate general projection parameters |
|---|
| 617 | Real vpLeft, vpRight, vpBottom, vpTop; |
|---|
| 618 | calcProjectionParameters(vpLeft, vpRight, vpBottom, vpTop); |
|---|
| 619 | |
|---|
| 620 | Real vpWidth = vpRight - vpLeft; |
|---|
| 621 | Real vpHeight = vpTop - vpBottom; |
|---|
| 622 | |
|---|
| 623 | Real wvpLeft = vpLeft + mWLeft * vpWidth; |
|---|
| 624 | Real wvpRight = vpLeft + mWRight * vpWidth; |
|---|
| 625 | Real wvpTop = vpTop - mWTop * vpHeight; |
|---|
| 626 | Real wvpBottom = vpTop - mWBottom * vpHeight; |
|---|
| 627 | |
|---|
| 628 | Vector3 vp_ul (wvpLeft, wvpTop, -mNearDist); |
|---|
| 629 | Vector3 vp_ur (wvpRight, wvpTop, -mNearDist); |
|---|
| 630 | Vector3 vp_bl (wvpLeft, wvpBottom, -mNearDist); |
|---|
| 631 | Vector3 vp_br (wvpRight, wvpBottom, -mNearDist); |
|---|
| 632 | |
|---|
| 633 | Matrix4 inv = mViewMatrix.inverseAffine(); |
|---|
| 634 | |
|---|
| 635 | Vector3 vw_ul = inv.transformAffine(vp_ul); |
|---|
| 636 | Vector3 vw_ur = inv.transformAffine(vp_ur); |
|---|
| 637 | Vector3 vw_bl = inv.transformAffine(vp_bl); |
|---|
| 638 | Vector3 vw_br = inv.transformAffine(vp_br); |
|---|
| 639 | |
|---|
| 640 | if (mProjType == PT_PERSPECTIVE) |
|---|
| 641 | { |
|---|
| 642 | Vector3 position = getPosition(); |
|---|
| 643 | mWindowClipPlanes.push_back(Plane(position, vw_bl, vw_ul)); |
|---|
| 644 | mWindowClipPlanes.push_back(Plane(position, vw_ul, vw_ur)); |
|---|
| 645 | mWindowClipPlanes.push_back(Plane(position, vw_ur, vw_br)); |
|---|
| 646 | mWindowClipPlanes.push_back(Plane(position, vw_br, vw_bl)); |
|---|
| 647 | } |
|---|
| 648 | else |
|---|
| 649 | { |
|---|
| 650 | Vector3 x_axis(inv[0][0], inv[0][1], inv[0][2]); |
|---|
| 651 | Vector3 y_axis(inv[1][0], inv[1][1], inv[1][2]); |
|---|
| 652 | x_axis.normalise(); |
|---|
| 653 | y_axis.normalise(); |
|---|
| 654 | mWindowClipPlanes.push_back(Plane( x_axis, vw_bl)); |
|---|
| 655 | mWindowClipPlanes.push_back(Plane(-x_axis, vw_ur)); |
|---|
| 656 | mWindowClipPlanes.push_back(Plane( y_axis, vw_bl)); |
|---|
| 657 | mWindowClipPlanes.push_back(Plane(-y_axis, vw_ur)); |
|---|
| 658 | } |
|---|
| 659 | |
|---|
| 660 | mRecalcWindow = false; |
|---|
| 661 | |
|---|
| 662 | } |
|---|
| 663 | // ------------------------------------------------------------------- |
|---|
| 664 | const std::vector<Plane>& Camera::getWindowPlanes(void) const |
|---|
| 665 | { |
|---|
| 666 | updateView(); |
|---|
| 667 | setWindowImpl(); |
|---|
| 668 | return mWindowClipPlanes; |
|---|
| 669 | } |
|---|
| 670 | // ------------------------------------------------------------------- |
|---|
| 671 | Real Camera::getBoundingRadius(void) const |
|---|
| 672 | { |
|---|
| 673 | // return a little bigger than the near distance |
|---|
| 674 | // just to keep things just outside |
|---|
| 675 | return mNearDist * 1.5; |
|---|
| 676 | |
|---|
| 677 | } |
|---|
| 678 | //----------------------------------------------------------------------- |
|---|
| 679 | const Vector3& Camera::getPositionForViewUpdate(void) const |
|---|
| 680 | { |
|---|
| 681 | // Note no update, because we're calling this from the update! |
|---|
| 682 | return mRealPosition; |
|---|
| 683 | } |
|---|
| 684 | //----------------------------------------------------------------------- |
|---|
| 685 | const Quaternion& Camera::getOrientationForViewUpdate(void) const |
|---|
| 686 | { |
|---|
| 687 | return mRealOrientation; |
|---|
| 688 | } |
|---|
| 689 | //----------------------------------------------------------------------- |
|---|
| 690 | bool Camera::getAutoAspectRatio(void) const |
|---|
| 691 | { |
|---|
| 692 | return mAutoAspectRatio; |
|---|
| 693 | } |
|---|
| 694 | //----------------------------------------------------------------------- |
|---|
| 695 | void Camera::setAutoAspectRatio(bool autoratio) |
|---|
| 696 | { |
|---|
| 697 | mAutoAspectRatio = autoratio; |
|---|
| 698 | } |
|---|
| 699 | //----------------------------------------------------------------------- |
|---|
| 700 | bool Camera::isVisible(const AxisAlignedBox& bound, FrustumPlane* culledBy) const |
|---|
| 701 | { |
|---|
| 702 | if (mCullFrustum) |
|---|
| 703 | { |
|---|
| 704 | return mCullFrustum->isVisible(bound, culledBy); |
|---|
| 705 | } |
|---|
| 706 | else |
|---|
| 707 | { |
|---|
| 708 | return Frustum::isVisible(bound, culledBy); |
|---|
| 709 | } |
|---|
| 710 | } |
|---|
| 711 | //----------------------------------------------------------------------- |
|---|
| 712 | bool Camera::isVisible(const Sphere& bound, FrustumPlane* culledBy) const |
|---|
| 713 | { |
|---|
| 714 | if (mCullFrustum) |
|---|
| 715 | { |
|---|
| 716 | return mCullFrustum->isVisible(bound, culledBy); |
|---|
| 717 | } |
|---|
| 718 | else |
|---|
| 719 | { |
|---|
| 720 | return Frustum::isVisible(bound, culledBy); |
|---|
| 721 | } |
|---|
| 722 | } |
|---|
| 723 | //----------------------------------------------------------------------- |
|---|
| 724 | bool Camera::isVisible(const Vector3& vert, FrustumPlane* culledBy) const |
|---|
| 725 | { |
|---|
| 726 | if (mCullFrustum) |
|---|
| 727 | { |
|---|
| 728 | return mCullFrustum->isVisible(vert, culledBy); |
|---|
| 729 | } |
|---|
| 730 | else |
|---|
| 731 | { |
|---|
| 732 | return Frustum::isVisible(vert, culledBy); |
|---|
| 733 | } |
|---|
| 734 | } |
|---|
| 735 | //----------------------------------------------------------------------- |
|---|
| 736 | const Vector3* Camera::getWorldSpaceCorners(void) const |
|---|
| 737 | { |
|---|
| 738 | if (mCullFrustum) |
|---|
| 739 | { |
|---|
| 740 | return mCullFrustum->getWorldSpaceCorners(); |
|---|
| 741 | } |
|---|
| 742 | else |
|---|
| 743 | { |
|---|
| 744 | return Frustum::getWorldSpaceCorners(); |
|---|
| 745 | } |
|---|
| 746 | } |
|---|
| 747 | //----------------------------------------------------------------------- |
|---|
| 748 | const Plane& Camera::getFrustumPlane( unsigned short plane ) const |
|---|
| 749 | { |
|---|
| 750 | if (mCullFrustum) |
|---|
| 751 | { |
|---|
| 752 | return mCullFrustum->getFrustumPlane(plane); |
|---|
| 753 | } |
|---|
| 754 | else |
|---|
| 755 | { |
|---|
| 756 | return Frustum::getFrustumPlane(plane); |
|---|
| 757 | } |
|---|
| 758 | } |
|---|
| 759 | //----------------------------------------------------------------------- |
|---|
| 760 | bool Camera::projectSphere(const Sphere& sphere, |
|---|
| 761 | Real* left, Real* top, Real* right, Real* bottom) const |
|---|
| 762 | { |
|---|
| 763 | if (mCullFrustum) |
|---|
| 764 | { |
|---|
| 765 | return mCullFrustum->projectSphere(sphere, left, top, right, bottom); |
|---|
| 766 | } |
|---|
| 767 | else |
|---|
| 768 | { |
|---|
| 769 | return Frustum::projectSphere(sphere, left, top, right, bottom); |
|---|
| 770 | } |
|---|
| 771 | } |
|---|
| 772 | //----------------------------------------------------------------------- |
|---|
| 773 | Real Camera::getNearClipDistance(void) const |
|---|
| 774 | { |
|---|
| 775 | if (mCullFrustum) |
|---|
| 776 | { |
|---|
| 777 | return mCullFrustum->getNearClipDistance(); |
|---|
| 778 | } |
|---|
| 779 | else |
|---|
| 780 | { |
|---|
| 781 | return Frustum::getNearClipDistance(); |
|---|
| 782 | } |
|---|
| 783 | } |
|---|
| 784 | //----------------------------------------------------------------------- |
|---|
| 785 | Real Camera::getFarClipDistance(void) const |
|---|
| 786 | { |
|---|
| 787 | if (mCullFrustum) |
|---|
| 788 | { |
|---|
| 789 | return mCullFrustum->getFarClipDistance(); |
|---|
| 790 | } |
|---|
| 791 | else |
|---|
| 792 | { |
|---|
| 793 | return Frustum::getFarClipDistance(); |
|---|
| 794 | } |
|---|
| 795 | } |
|---|
| 796 | //----------------------------------------------------------------------- |
|---|
| 797 | const Matrix4& Camera::getViewMatrix(void) const |
|---|
| 798 | { |
|---|
| 799 | if (mCullFrustum) |
|---|
| 800 | { |
|---|
| 801 | return mCullFrustum->getViewMatrix(); |
|---|
| 802 | } |
|---|
| 803 | else |
|---|
| 804 | { |
|---|
| 805 | return Frustum::getViewMatrix(); |
|---|
| 806 | } |
|---|
| 807 | } |
|---|
| 808 | //----------------------------------------------------------------------- |
|---|
| 809 | const Matrix4& Camera::getViewMatrix(bool ownFrustumOnly) const |
|---|
| 810 | { |
|---|
| 811 | if (ownFrustumOnly) |
|---|
| 812 | { |
|---|
| 813 | return Frustum::getViewMatrix(); |
|---|
| 814 | } |
|---|
| 815 | else |
|---|
| 816 | { |
|---|
| 817 | return getViewMatrix(); |
|---|
| 818 | } |
|---|
| 819 | } |
|---|
| 820 | //----------------------------------------------------------------------- |
|---|
| 821 | //_______________________________________________________ |
|---|
| 822 | //| | |
|---|
| 823 | //| getRayForwardIntersect | |
|---|
| 824 | //| ----------------------------- | |
|---|
| 825 | //| get the intersections of frustum rays with a plane | |
|---|
| 826 | //| of interest. The plane is assumed to have constant | |
|---|
| 827 | //| z. If this is not the case, rays | |
|---|
| 828 | //| should be rotated beforehand to work in a | |
|---|
| 829 | //| coordinate system in which this is true. | |
|---|
| 830 | //|_____________________________________________________| |
|---|
| 831 | // |
|---|
| 832 | std::vector<Vector4> Camera::getRayForwardIntersect(const Vector3& anchor, const Vector3 *dir, Real planeOffset) const |
|---|
| 833 | { |
|---|
| 834 | std::vector<Vector4> res; |
|---|
| 835 | |
|---|
| 836 | if(!dir) |
|---|
| 837 | return res; |
|---|
| 838 | |
|---|
| 839 | int infpt[4] = {0, 0, 0, 0}; // 0=finite, 1=infinite, 2=straddles infinity |
|---|
| 840 | Vector3 vec[4]; |
|---|
| 841 | |
|---|
| 842 | // find how much the anchor point must be displaced in the plane's |
|---|
| 843 | // constant variable |
|---|
| 844 | Real delta = planeOffset - anchor.z; |
|---|
| 845 | |
|---|
| 846 | // now set the intersection point and note whether it is a |
|---|
| 847 | // point at infinity or straddles infinity |
|---|
| 848 | unsigned int i; |
|---|
| 849 | for (i=0; i<4; i++) |
|---|
| 850 | { |
|---|
| 851 | Real test = dir[i].z * delta; |
|---|
| 852 | if (test == 0.0) { |
|---|
| 853 | vec[i] = dir[i]; |
|---|
| 854 | infpt[i] = 1; |
|---|
| 855 | } |
|---|
| 856 | else { |
|---|
| 857 | Real lambda = delta / dir[i].z; |
|---|
| 858 | vec[i] = anchor + (lambda * dir[i]); |
|---|
| 859 | if(test < 0.0) |
|---|
| 860 | infpt[i] = 2; |
|---|
| 861 | } |
|---|
| 862 | } |
|---|
| 863 | |
|---|
| 864 | for (i=0; i<4; i++) |
|---|
| 865 | { |
|---|
| 866 | // store the finite intersection points |
|---|
| 867 | if (infpt[i] == 0) |
|---|
| 868 | res.push_back(Vector4(vec[i].x, vec[i].y, vec[i].z, 1.0)); |
|---|
| 869 | else |
|---|
| 870 | { |
|---|
| 871 | // handle the infinite points of intersection; |
|---|
| 872 | // cases split up into the possible frustum planes |
|---|
| 873 | // pieces which may contain a finite intersection point |
|---|
| 874 | int nextind = (i+1) % 4; |
|---|
| 875 | int prevind = (i+3) % 4; |
|---|
| 876 | if ((infpt[prevind] == 0) || (infpt[nextind] == 0)) |
|---|
| 877 | { |
|---|
| 878 | if (infpt[i] == 1) |
|---|
| 879 | res.push_back(Vector4(vec[i].x, vec[i].y, vec[i].z, 0.0)); |
|---|
| 880 | else |
|---|
| 881 | { |
|---|
| 882 | // handle the intersection points that straddle infinity (back-project) |
|---|
| 883 | if(infpt[prevind] == 0) |
|---|
| 884 | { |
|---|
| 885 | Vector3 temp = vec[prevind] - vec[i]; |
|---|
| 886 | res.push_back(Vector4(temp.x, temp.y, temp.z, 0.0)); |
|---|
| 887 | } |
|---|
| 888 | if(infpt[nextind] == 0) |
|---|
| 889 | { |
|---|
| 890 | Vector3 temp = vec[nextind] - vec[i]; |
|---|
| 891 | res.push_back(Vector4(temp.x, temp.y, temp.z, 0.0)); |
|---|
| 892 | } |
|---|
| 893 | } |
|---|
| 894 | } // end if we need to add an intersection point to the list |
|---|
| 895 | } // end if infinite point needs to be considered |
|---|
| 896 | } // end loop over frustun corners |
|---|
| 897 | |
|---|
| 898 | // we end up with either 0, 3, 4, or 5 intersection points |
|---|
| 899 | |
|---|
| 900 | return res; |
|---|
| 901 | } |
|---|
| 902 | |
|---|
| 903 | //_______________________________________________________ |
|---|
| 904 | //| | |
|---|
| 905 | //| forwardIntersect | |
|---|
| 906 | //| ----------------------------- | |
|---|
| 907 | //| Forward intersect the camera's frustum rays with | |
|---|
| 908 | //| a specified plane of interest. | |
|---|
| 909 | //| Note that if the frustum rays shoot out and would | |
|---|
| 910 | //| back project onto the plane, this means the forward | |
|---|
| 911 | //| intersection of the frustum would occur at the | |
|---|
| 912 | //| line at infinity. | |
|---|
| 913 | //|_____________________________________________________| |
|---|
| 914 | // |
|---|
| 915 | void Camera::forwardIntersect(const Plane& worldPlane, std::vector<Vector4>* intersect3d) const |
|---|
| 916 | { |
|---|
| 917 | if(!intersect3d) |
|---|
| 918 | return; |
|---|
| 919 | |
|---|
| 920 | Vector3 trCorner = getWorldSpaceCorners()[0]; |
|---|
| 921 | Vector3 tlCorner = getWorldSpaceCorners()[1]; |
|---|
| 922 | Vector3 blCorner = getWorldSpaceCorners()[2]; |
|---|
| 923 | Vector3 brCorner = getWorldSpaceCorners()[3]; |
|---|
| 924 | |
|---|
| 925 | // need some sort of rotation that will bring the plane normal to the z axis |
|---|
| 926 | Plane pval = worldPlane; |
|---|
| 927 | if(pval.normal.z < 0.0) |
|---|
| 928 | { |
|---|
| 929 | pval.normal *= -1.0; |
|---|
| 930 | pval.d *= -1.0; |
|---|
| 931 | } |
|---|
| 932 | Quaternion invPlaneRot = pval.normal.getRotationTo(Vector3::UNIT_Z); |
|---|
| 933 | |
|---|
| 934 | // get rotated light |
|---|
| 935 | Vector3 lPos = invPlaneRot * getDerivedPosition(); |
|---|
| 936 | Vector3 vec[4]; |
|---|
| 937 | vec[0] = invPlaneRot * trCorner - lPos; |
|---|
| 938 | vec[1] = invPlaneRot * tlCorner - lPos; |
|---|
| 939 | vec[2] = invPlaneRot * blCorner - lPos; |
|---|
| 940 | vec[3] = invPlaneRot * brCorner - lPos; |
|---|
| 941 | |
|---|
| 942 | // compute intersection points on plane |
|---|
| 943 | std::vector<Vector4> iPnt = getRayForwardIntersect(lPos, vec, -pval.d); |
|---|
| 944 | |
|---|
| 945 | |
|---|
| 946 | // return wanted data |
|---|
| 947 | if(intersect3d) |
|---|
| 948 | { |
|---|
| 949 | Quaternion planeRot = invPlaneRot.Inverse(); |
|---|
| 950 | (*intersect3d).clear(); |
|---|
| 951 | for(unsigned int i=0; i<iPnt.size(); i++) |
|---|
| 952 | { |
|---|
| 953 | Vector3 intersection = planeRot * Vector3(iPnt[i].x, iPnt[i].y, iPnt[i].z); |
|---|
| 954 | (*intersect3d).push_back(Vector4(intersection.x, intersection.y, intersection.z, iPnt[i].w)); |
|---|
| 955 | } |
|---|
| 956 | } |
|---|
| 957 | } |
|---|
| 958 | //----------------------------------------------------------------------- |
|---|
| 959 | |
|---|
| 960 | |
|---|
| 961 | } // namespace Ogre |
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