[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 | You may use this sample code for anything you like, it is not covered by the |
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| 11 | LGPL like the rest of the engine. |
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| 12 | ----------------------------------------------------------------------------- |
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| 13 | */ |
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| 14 | |
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| 15 | |
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| 16 | /** |
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| 17 | \file |
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| 18 | Bezier.h |
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| 19 | \brief |
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| 20 | Specialisation of OGRE's framework application to show off |
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| 21 | the bezier patch support. |
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| 22 | */ |
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| 23 | |
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| 24 | #include "ExampleApplication.h" |
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| 25 | |
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| 26 | // Hack struct for test |
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| 27 | PatchMeshPtr patch; |
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| 28 | Pass* patchPass; |
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| 29 | |
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| 30 | // Event handler to add ability to alter subdivision |
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| 31 | class BezierListener : public ExampleFrameListener |
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| 32 | { |
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| 33 | protected: |
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| 34 | public: |
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| 35 | BezierListener(RenderWindow* win, Camera* cam) |
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| 36 | : ExampleFrameListener(win, cam) |
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| 37 | { |
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| 38 | |
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| 39 | } |
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| 40 | |
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| 41 | bool frameStarted(const FrameEvent& evt) |
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| 42 | { |
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| 43 | if( ExampleFrameListener::frameStarted(evt) == false ) |
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| 44 | return false; |
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| 45 | |
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| 46 | static Real timeLapse = 0.0f; |
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| 47 | static Real factor = 0.0; |
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| 48 | static bool wireframe = 0; |
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| 49 | |
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| 50 | |
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| 51 | timeLapse += evt.timeSinceLastFrame; |
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| 52 | |
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| 53 | // Prgressively grow the patch |
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| 54 | if (timeLapse > 1.0f) |
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| 55 | { |
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| 56 | factor += 0.2; |
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| 57 | |
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| 58 | if (factor > 1.0f) |
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| 59 | { |
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| 60 | wireframe = !wireframe; |
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| 61 | //mCamera->setPolygonMode(wireframe ? PM_WIREFRAME : PM_SOLID); |
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| 62 | patchPass->setPolygonMode(wireframe ? PM_WIREFRAME : PM_SOLID); |
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| 63 | factor = 0.0f; |
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| 64 | |
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| 65 | } |
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| 66 | |
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| 67 | patch->setSubdivision(factor); |
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| 68 | mDebugText = "Bezier subdivision factor: " + StringConverter::toString(factor); |
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| 69 | timeLapse = 0.0f; |
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| 70 | |
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| 71 | } |
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| 72 | |
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| 73 | // Call default |
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| 74 | return true; |
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| 75 | } |
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| 76 | }; |
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| 77 | |
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| 78 | |
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| 79 | class BezierApplication : public ExampleApplication |
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| 80 | { |
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| 81 | protected: |
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| 82 | VertexDeclaration* patchDecl; |
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| 83 | float* patchCtlPoints; |
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| 84 | |
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| 85 | public: |
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| 86 | BezierApplication() : patchDecl(NULL), patchCtlPoints(NULL) { } |
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| 87 | ~BezierApplication() |
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| 88 | { |
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| 89 | if (patchCtlPoints) |
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| 90 | delete [] patchCtlPoints; |
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| 91 | |
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| 92 | // patch vertex declaration will be deleted automatically |
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| 93 | } |
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| 94 | |
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| 95 | protected: |
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| 96 | |
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| 97 | #if OGRE_COMPILER == OGRE_COMPILER_MSVC |
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| 98 | #pragma pack(push) |
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| 99 | #pragma pack(1) |
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| 100 | #endif |
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| 101 | struct PatchVertex { |
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| 102 | float x, y, z; |
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| 103 | float nx, ny, nz; |
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| 104 | float u, v; |
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| 105 | }; |
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| 106 | #if OGRE_COMPILER == OGRE_COMPILER_MSVC |
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| 107 | #pragma pack(pop) |
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| 108 | #endif |
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| 109 | |
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| 110 | // Just override the mandatory create scene method |
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| 111 | void createScene(void) |
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| 112 | { |
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| 113 | // Set ambient light |
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| 114 | mSceneMgr->setAmbientLight(ColourValue(0.2, 0.2, 0.2)); |
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| 115 | |
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| 116 | // Create a point light |
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| 117 | Light* l = mSceneMgr->createLight("MainLight"); |
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| 118 | // Accept default settings: point light, white diffuse, just set position |
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| 119 | // NB I could attach the light to a SceneNode if I wanted it to move automatically with |
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| 120 | // other objects, but I don't |
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| 121 | l->setType(Light::LT_DIRECTIONAL); |
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| 122 | l->setDirection(-0.5, -0.5, 0); |
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| 123 | |
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| 124 | // Create patch |
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| 125 | patchDecl = HardwareBufferManager::getSingleton().createVertexDeclaration(); |
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| 126 | patchDecl->addElement(0, 0, VET_FLOAT3, VES_POSITION); |
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| 127 | patchDecl->addElement(0, sizeof(float)*3, VET_FLOAT3, VES_NORMAL); |
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| 128 | patchDecl->addElement(0, sizeof(float)*6, VET_FLOAT2, VES_TEXTURE_COORDINATES, 0); |
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| 129 | |
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| 130 | // Make a 3x3 patch for test |
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| 131 | patchCtlPoints = (float*)( new PatchVertex[9] ); |
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| 132 | |
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| 133 | // Patch data |
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| 134 | PatchVertex *pVert = (PatchVertex*)patchCtlPoints; |
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| 135 | |
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| 136 | pVert->x = -500.0; pVert->y = 200.0; pVert->z = -500.0; |
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| 137 | pVert->nx = -0.5; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 138 | pVert->u = 0.0; pVert->v = 0.0; |
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| 139 | pVert++; |
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| 140 | pVert->x = 0.0; pVert->y = 500.0; pVert->z = -750.0; |
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| 141 | pVert->nx = 0.0; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 142 | pVert->u = 0.5; pVert->v = 0.0; |
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| 143 | pVert++; |
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| 144 | pVert->x = 500.0; pVert->y = 1000.0; pVert->z = -500.0; |
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| 145 | pVert->nx = 0.5; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 146 | pVert->u = 1.0; pVert->v = 0.0; |
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| 147 | pVert++; |
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| 148 | |
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| 149 | pVert->x = -500.0; pVert->y = 0.0; pVert->z = 0.0; |
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| 150 | pVert->nx = -0.5; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 151 | pVert->u = 0.0; pVert->v = 0.5; |
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| 152 | pVert++; |
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| 153 | pVert->x = 0.0; pVert->y = 500.0; pVert->z = 0.0; |
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| 154 | pVert->nx = 0.0; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 155 | pVert->u = 0.5; pVert->v = 0.5; |
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| 156 | pVert++; |
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| 157 | pVert->x = 500.0; pVert->y = -50.0; pVert->z = 0.0; |
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| 158 | pVert->nx = 0.5; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 159 | pVert->u = 1.0; pVert->v = 0.5; |
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| 160 | pVert++; |
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| 161 | |
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| 162 | pVert->x = -500.0; pVert->y = 0.0; pVert->z = 500.0; |
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| 163 | pVert->nx = -0.5; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 164 | pVert->u = 0.0; pVert->v = 1.0; |
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| 165 | pVert++; |
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| 166 | pVert->x = 0.0; pVert->y = 500.0; pVert->z = 500.0; |
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| 167 | pVert->nx = 0.0; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 168 | pVert->u = 0.5; pVert->v = 1.0; |
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| 169 | pVert++; |
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| 170 | pVert->x = 500.0; pVert->y = 200.0; pVert->z = 800.0; |
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| 171 | pVert->nx = 0.5; pVert->ny = 0.5; pVert->nz = 0.0; |
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| 172 | pVert->u = 1.0; pVert->v = 1.0; |
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| 173 | pVert++; |
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| 174 | |
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| 175 | |
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| 176 | patch = MeshManager::getSingleton().createBezierPatch( |
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| 177 | "Bezier1", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, |
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| 178 | patchCtlPoints, patchDecl, |
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| 179 | 3, 3, 5, 5, PatchSurface::VS_BOTH); |
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| 180 | |
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| 181 | // Start patch at 0 detail |
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| 182 | patch->setSubdivision(0.0f); |
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| 183 | // Create entity based on patch |
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| 184 | Entity* patchEntity = mSceneMgr->createEntity("Entity1", "Bezier1"); |
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| 185 | |
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| 186 | MaterialPtr pMat = MaterialManager::getSingleton().create("TextMat", |
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| 187 | ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME); |
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| 188 | pMat->getTechnique(0)->getPass(0)->createTextureUnitState( "BumpyMetal.jpg" ); |
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| 189 | patchEntity->setMaterialName("TextMat"); |
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| 190 | patchPass = pMat->getTechnique(0)->getPass(0); |
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| 191 | |
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| 192 | // Attach the entity to the root of the scene |
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| 193 | mSceneMgr->getRootSceneNode()->attachObject(patchEntity); |
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| 194 | |
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| 195 | mCamera->setPosition(500,500, 1500); |
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| 196 | mCamera->lookAt(0,200,-300); |
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| 197 | |
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| 198 | } |
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| 199 | void destroyScene(void) |
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| 200 | { |
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| 201 | // free up the pointer before we shut down OGRE |
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| 202 | patch.setNull(); |
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| 203 | } |
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| 204 | void createFrameListener(void) |
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| 205 | { |
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| 206 | // This is where we instantiate our own frame listener |
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| 207 | mFrameListener= new BezierListener(mWindow, mCamera); |
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| 208 | mRoot->addFrameListener(mFrameListener); |
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| 209 | |
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| 210 | } |
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| 211 | |
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| 212 | }; |
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