[5] | 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 | |
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| 30 | #include "OgreStableHeaders.h" |
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| 31 | #include "OgrePrefabFactory.h" |
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| 32 | #include "OgreHardwareBufferManager.h" |
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| 33 | #include "OgreMesh.h" |
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| 34 | #include "OgreSubMesh.h" |
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| 35 | |
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| 36 | namespace Ogre { |
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| 37 | //--------------------------------------------------------------------- |
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| 38 | bool PrefabFactory::createPrefab(Mesh* mesh) |
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| 39 | { |
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| 40 | const String& resourceName = mesh->getName(); |
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| 41 | |
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| 42 | if(resourceName == "Prefab_Plane") |
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| 43 | { |
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| 44 | createPlane(mesh); |
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| 45 | return true; |
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| 46 | } |
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| 47 | else if(resourceName == "Prefab_Cube") |
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| 48 | { |
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| 49 | createCube(mesh); |
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| 50 | return true; |
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| 51 | } |
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| 52 | else if(resourceName == "Prefab_Sphere") |
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| 53 | { |
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| 54 | createSphere(mesh); |
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| 55 | return true; |
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| 56 | } |
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| 57 | |
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| 58 | return false; |
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| 59 | } |
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| 60 | //--------------------------------------------------------------------- |
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| 61 | void PrefabFactory::createPlane(Mesh* mesh) |
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| 62 | { |
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| 63 | SubMesh* sub = mesh->createSubMesh(); |
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| 64 | float vertices[32] = { |
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| 65 | -100, -100, 0, // pos |
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| 66 | 0,0,1, // normal |
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| 67 | 0,1, // texcoord |
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| 68 | 100, -100, 0, |
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| 69 | 0,0,1, |
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| 70 | 1,1, |
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| 71 | 100, 100, 0, |
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| 72 | 0,0,1, |
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| 73 | 1,0, |
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| 74 | -100, 100, 0 , |
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| 75 | 0,0,1, |
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| 76 | 0,0 |
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| 77 | }; |
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| 78 | mesh->sharedVertexData = new VertexData(); |
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| 79 | mesh->sharedVertexData->vertexCount = 4; |
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| 80 | VertexDeclaration* decl = mesh->sharedVertexData->vertexDeclaration; |
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| 81 | VertexBufferBinding* bind = mesh->sharedVertexData->vertexBufferBinding; |
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| 82 | |
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| 83 | size_t offset = 0; |
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| 84 | decl->addElement(0, offset, VET_FLOAT3, VES_POSITION); |
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| 85 | offset += VertexElement::getTypeSize(VET_FLOAT3); |
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| 86 | decl->addElement(0, offset, VET_FLOAT3, VES_NORMAL); |
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| 87 | offset += VertexElement::getTypeSize(VET_FLOAT3); |
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| 88 | decl->addElement(0, offset, VET_FLOAT2, VES_TEXTURE_COORDINATES, 0); |
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| 89 | offset += VertexElement::getTypeSize(VET_FLOAT2); |
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| 90 | |
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| 91 | HardwareVertexBufferSharedPtr vbuf = |
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| 92 | HardwareBufferManager::getSingleton().createVertexBuffer( |
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| 93 | offset, 4, HardwareBuffer::HBU_STATIC_WRITE_ONLY); |
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| 94 | bind->setBinding(0, vbuf); |
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| 95 | |
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| 96 | vbuf->writeData(0, vbuf->getSizeInBytes(), vertices, true); |
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| 97 | |
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| 98 | sub->useSharedVertices = true; |
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| 99 | HardwareIndexBufferSharedPtr ibuf = HardwareBufferManager::getSingleton(). |
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| 100 | createIndexBuffer( |
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| 101 | HardwareIndexBuffer::IT_16BIT, |
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| 102 | 6, |
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| 103 | HardwareBuffer::HBU_STATIC_WRITE_ONLY); |
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| 104 | |
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| 105 | unsigned short faces[6] = {0,1,2, |
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| 106 | 0,2,3 }; |
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| 107 | sub->indexData->indexBuffer = ibuf; |
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| 108 | sub->indexData->indexCount = 6; |
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| 109 | sub->indexData->indexStart =0; |
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| 110 | ibuf->writeData(0, ibuf->getSizeInBytes(), faces, true); |
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| 111 | |
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| 112 | mesh->_setBounds(AxisAlignedBox(-100,-100,0,100,100,0), true); |
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| 113 | mesh->_setBoundingSphereRadius(Math::Sqrt(100*100+100*100)); |
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| 114 | } |
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| 115 | //--------------------------------------------------------------------- |
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| 116 | void PrefabFactory::createCube(Mesh* mesh) |
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| 117 | { |
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| 118 | SubMesh* sub = mesh->createSubMesh(); |
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| 119 | |
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| 120 | const int NUM_VERTICES = 4 * 6; // 4 vertices per side * 6 sides |
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| 121 | const int NUM_ENTRIES_PER_VERTEX = 8; |
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| 122 | const int NUM_VERTEX_ENTRIES = NUM_VERTICES * NUM_ENTRIES_PER_VERTEX; |
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| 123 | const int NUM_INDICES = 3 * 2 * 6; // 3 indices per face * 2 faces per side * 6 sides |
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| 124 | |
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| 125 | const Real CUBE_SIZE = 100.0; |
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| 126 | const Real CUBE_HALF_SIZE = CUBE_SIZE / 2.0; |
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| 127 | |
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| 128 | // Create 4 vertices per side instead of 6 that are shared for the whole cube. |
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| 129 | // The reason for this is with only 6 vertices the normals will look bad |
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| 130 | // since each vertex can "point" in a different direction depending on the face it is included in. |
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| 131 | float vertices[NUM_VERTEX_ENTRIES] = { |
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| 132 | // front side |
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| 133 | -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, CUBE_HALF_SIZE, // pos |
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| 134 | 0,0,1, // normal |
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| 135 | 0,1, // texcoord |
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| 136 | CUBE_HALF_SIZE, -CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 137 | 0,0,1, |
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| 138 | 1,1, |
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| 139 | CUBE_HALF_SIZE, CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 140 | 0,0,1, |
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| 141 | 1,0, |
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| 142 | -CUBE_HALF_SIZE, CUBE_HALF_SIZE, CUBE_HALF_SIZE , |
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| 143 | 0,0,1, |
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| 144 | 0,0, |
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| 145 | |
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| 146 | // back side |
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| 147 | CUBE_HALF_SIZE, -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 148 | 0,0,-1, |
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| 149 | 0,1, |
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| 150 | -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 151 | 0,0,-1, |
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| 152 | 1,1, |
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| 153 | -CUBE_HALF_SIZE, CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 154 | 0,0,-1, |
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| 155 | 1,0, |
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| 156 | CUBE_HALF_SIZE, CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 157 | 0,0,-1, |
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| 158 | 0,0, |
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| 159 | |
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| 160 | // left side |
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| 161 | -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 162 | -1,0,0, |
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| 163 | 0,1, |
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| 164 | -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 165 | -1,0,0, |
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| 166 | 1,1, |
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| 167 | -CUBE_HALF_SIZE, CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 168 | -1,0,0, |
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| 169 | 1,0, |
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| 170 | -CUBE_HALF_SIZE, CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 171 | -1,0,0, |
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| 172 | 0,0, |
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| 173 | |
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| 174 | // right side |
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| 175 | CUBE_HALF_SIZE, -CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 176 | 1,0,0, |
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| 177 | 0,1, |
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| 178 | CUBE_HALF_SIZE, -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 179 | 1,0,0, |
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| 180 | 1,1, |
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| 181 | CUBE_HALF_SIZE, CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 182 | 1,0,0, |
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| 183 | 1,0, |
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| 184 | CUBE_HALF_SIZE, CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 185 | 1,0,0, |
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| 186 | 0,0, |
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| 187 | |
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| 188 | // up side |
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| 189 | -CUBE_HALF_SIZE, CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 190 | 0,1,0, |
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| 191 | 0,1, |
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| 192 | CUBE_HALF_SIZE, CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 193 | 0,1,0, |
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| 194 | 1,1, |
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| 195 | CUBE_HALF_SIZE, CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 196 | 0,1,0, |
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| 197 | 1,0, |
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| 198 | -CUBE_HALF_SIZE, CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 199 | 0,1,0, |
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| 200 | 0,0, |
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| 201 | |
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| 202 | // down side |
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| 203 | -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 204 | 0,-1,0, |
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| 205 | 0,1, |
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| 206 | CUBE_HALF_SIZE, -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 207 | 0,-1,0, |
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| 208 | 1,1, |
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| 209 | CUBE_HALF_SIZE, -CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 210 | 0,-1,0, |
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| 211 | 1,0, |
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| 212 | -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, CUBE_HALF_SIZE, |
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| 213 | 0,-1,0, |
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| 214 | 0,0 |
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| 215 | }; |
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| 216 | |
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| 217 | mesh->sharedVertexData = new VertexData(); |
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| 218 | mesh->sharedVertexData->vertexCount = NUM_VERTICES; |
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| 219 | VertexDeclaration* decl = mesh->sharedVertexData->vertexDeclaration; |
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| 220 | VertexBufferBinding* bind = mesh->sharedVertexData->vertexBufferBinding; |
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| 221 | |
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| 222 | size_t offset = 0; |
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| 223 | decl->addElement(0, offset, VET_FLOAT3, VES_POSITION); |
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| 224 | offset += VertexElement::getTypeSize(VET_FLOAT3); |
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| 225 | decl->addElement(0, offset, VET_FLOAT3, VES_NORMAL); |
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| 226 | offset += VertexElement::getTypeSize(VET_FLOAT3); |
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| 227 | decl->addElement(0, offset, VET_FLOAT2, VES_TEXTURE_COORDINATES, 0); |
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| 228 | offset += VertexElement::getTypeSize(VET_FLOAT2); |
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| 229 | |
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| 230 | HardwareVertexBufferSharedPtr vbuf = |
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| 231 | HardwareBufferManager::getSingleton().createVertexBuffer( |
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| 232 | offset, NUM_VERTICES, HardwareBuffer::HBU_STATIC_WRITE_ONLY); |
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| 233 | bind->setBinding(0, vbuf); |
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| 234 | |
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| 235 | vbuf->writeData(0, vbuf->getSizeInBytes(), vertices, true); |
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| 236 | |
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| 237 | sub->useSharedVertices = true; |
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| 238 | HardwareIndexBufferSharedPtr ibuf = HardwareBufferManager::getSingleton(). |
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| 239 | createIndexBuffer( |
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| 240 | HardwareIndexBuffer::IT_16BIT, |
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| 241 | NUM_INDICES, |
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| 242 | HardwareBuffer::HBU_STATIC_WRITE_ONLY); |
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| 243 | |
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| 244 | unsigned short faces[NUM_INDICES] = { |
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| 245 | // front |
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| 246 | 0,1,2, |
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| 247 | 0,2,3, |
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| 248 | |
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| 249 | // back |
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| 250 | 4,5,6, |
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| 251 | 4,6,7, |
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| 252 | |
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| 253 | // left |
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| 254 | 8,9,10, |
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| 255 | 8,10,11, |
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| 256 | |
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| 257 | // right |
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| 258 | 12,13,14, |
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| 259 | 12,14,15, |
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| 260 | |
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| 261 | // up |
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| 262 | 16,17,18, |
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| 263 | 16,18,19, |
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| 264 | |
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| 265 | // down |
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| 266 | 20,21,22, |
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| 267 | 20,22,23 |
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| 268 | }; |
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| 269 | |
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| 270 | sub->indexData->indexBuffer = ibuf; |
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| 271 | sub->indexData->indexCount = NUM_INDICES; |
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| 272 | sub->indexData->indexStart = 0; |
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| 273 | ibuf->writeData(0, ibuf->getSizeInBytes(), faces, true); |
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| 274 | |
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| 275 | mesh->_setBounds(AxisAlignedBox(-CUBE_HALF_SIZE, -CUBE_HALF_SIZE, -CUBE_HALF_SIZE, |
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| 276 | CUBE_HALF_SIZE, CUBE_HALF_SIZE, CUBE_HALF_SIZE), true); |
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| 277 | |
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| 278 | mesh->_setBoundingSphereRadius(CUBE_HALF_SIZE); |
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| 279 | } |
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| 280 | //--------------------------------------------------------------------- |
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| 281 | void PrefabFactory::createSphere(Mesh* mesh) |
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| 282 | { |
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| 283 | // sphere creation code taken from the DeferredShading sample, originally from the wiki |
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| 284 | SubMesh *pSphereVertex = mesh->createSubMesh(); |
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| 285 | |
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| 286 | const int NUM_SEGMENTS = 16; |
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| 287 | const int NUM_RINGS = 16; |
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| 288 | const Real SPHERE_RADIUS = 50.0; |
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| 289 | |
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| 290 | mesh->sharedVertexData = new VertexData(); |
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| 291 | VertexData* vertexData = mesh->sharedVertexData; |
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| 292 | |
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| 293 | // define the vertex format |
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| 294 | VertexDeclaration* vertexDecl = vertexData->vertexDeclaration; |
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| 295 | size_t currOffset = 0; |
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| 296 | // positions |
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| 297 | vertexDecl->addElement(0, currOffset, VET_FLOAT3, VES_POSITION); |
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| 298 | currOffset += VertexElement::getTypeSize(VET_FLOAT3); |
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| 299 | // normals |
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| 300 | vertexDecl->addElement(0, currOffset, VET_FLOAT3, VES_NORMAL); |
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| 301 | currOffset += VertexElement::getTypeSize(VET_FLOAT3); |
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| 302 | // two dimensional texture coordinates |
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| 303 | vertexDecl->addElement(0, currOffset, VET_FLOAT2, VES_TEXTURE_COORDINATES, 0); |
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| 304 | currOffset += VertexElement::getTypeSize(VET_FLOAT2); |
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| 305 | |
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| 306 | // allocate the vertex buffer |
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| 307 | vertexData->vertexCount = (NUM_RINGS + 1) * (NUM_SEGMENTS+1); |
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| 308 | HardwareVertexBufferSharedPtr vBuf = HardwareBufferManager::getSingleton().createVertexBuffer(vertexDecl->getVertexSize(0), vertexData->vertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY, false); |
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| 309 | VertexBufferBinding* binding = vertexData->vertexBufferBinding; |
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| 310 | binding->setBinding(0, vBuf); |
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| 311 | float* pVertex = static_cast<float*>(vBuf->lock(HardwareBuffer::HBL_DISCARD)); |
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| 312 | |
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| 313 | // allocate index buffer |
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| 314 | pSphereVertex->indexData->indexCount = 6 * NUM_RINGS * (NUM_SEGMENTS + 1); |
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| 315 | pSphereVertex->indexData->indexBuffer = HardwareBufferManager::getSingleton().createIndexBuffer(HardwareIndexBuffer::IT_16BIT, pSphereVertex->indexData->indexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY, false); |
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| 316 | HardwareIndexBufferSharedPtr iBuf = pSphereVertex->indexData->indexBuffer; |
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| 317 | unsigned short* pIndices = static_cast<unsigned short*>(iBuf->lock(HardwareBuffer::HBL_DISCARD)); |
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| 318 | |
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| 319 | float fDeltaRingAngle = (Math::PI / NUM_RINGS); |
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| 320 | float fDeltaSegAngle = (2 * Math::PI / NUM_SEGMENTS); |
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| 321 | unsigned short wVerticeIndex = 0 ; |
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| 322 | |
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| 323 | // Generate the group of rings for the sphere |
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| 324 | for( int ring = 0; ring <= NUM_RINGS; ring++ ) { |
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| 325 | float r0 = SPHERE_RADIUS * sinf (ring * fDeltaRingAngle); |
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| 326 | float y0 = SPHERE_RADIUS * cosf (ring * fDeltaRingAngle); |
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| 327 | |
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| 328 | // Generate the group of segments for the current ring |
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| 329 | for(int seg = 0; seg <= NUM_SEGMENTS; seg++) { |
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| 330 | float x0 = r0 * sinf(seg * fDeltaSegAngle); |
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| 331 | float z0 = r0 * cosf(seg * fDeltaSegAngle); |
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| 332 | |
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| 333 | // Add one vertex to the strip which makes up the sphere |
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| 334 | *pVertex++ = x0; |
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| 335 | *pVertex++ = y0; |
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| 336 | *pVertex++ = z0; |
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| 337 | |
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| 338 | Vector3 vNormal = Vector3(x0, y0, z0).normalisedCopy(); |
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| 339 | *pVertex++ = vNormal.x; |
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| 340 | *pVertex++ = vNormal.y; |
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| 341 | *pVertex++ = vNormal.z; |
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| 342 | |
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| 343 | *pVertex++ = (float) seg / (float) NUM_SEGMENTS; |
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| 344 | *pVertex++ = (float) ring / (float) NUM_RINGS; |
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| 345 | |
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| 346 | if (ring != NUM_RINGS) { |
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| 347 | // each vertex (except the last) has six indicies pointing to it |
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| 348 | *pIndices++ = wVerticeIndex + NUM_SEGMENTS + 1; |
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| 349 | *pIndices++ = wVerticeIndex; |
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| 350 | *pIndices++ = wVerticeIndex + NUM_SEGMENTS; |
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| 351 | *pIndices++ = wVerticeIndex + NUM_SEGMENTS + 1; |
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| 352 | *pIndices++ = wVerticeIndex + 1; |
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| 353 | *pIndices++ = wVerticeIndex; |
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| 354 | wVerticeIndex ++; |
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| 355 | } |
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| 356 | }; // end for seg |
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| 357 | } // end for ring |
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| 358 | |
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| 359 | // Unlock |
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| 360 | vBuf->unlock(); |
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| 361 | iBuf->unlock(); |
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| 362 | // Generate face list |
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| 363 | pSphereVertex->useSharedVertices = true; |
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| 364 | |
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| 365 | // the original code was missing this line: |
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| 366 | mesh->_setBounds( AxisAlignedBox( Vector3(-SPHERE_RADIUS, -SPHERE_RADIUS, -SPHERE_RADIUS), |
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| 367 | Vector3(SPHERE_RADIUS, SPHERE_RADIUS, SPHERE_RADIUS) ), false ); |
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| 368 | |
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| 369 | mesh->_setBoundingSphereRadius(SPHERE_RADIUS); |
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| 370 | } |
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| 371 | //--------------------------------------------------------------------- |
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| 372 | } |
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