[1] | 1 | // Dynamic texturing demo |
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| 2 | // |
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| 3 | // Feel free to use this for anything you want (Wumpus, OGRE Team 2004). This file is public domain. |
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| 4 | // Uses the Grey-Scott diffusion reaction process, a nice overview of the parameter space can be seen at |
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| 5 | // http://www.cacr.caltech.edu/ismap/image.html |
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| 6 | // |
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| 7 | // Some very cool effects can be reached with some combinations of parameters, varying the parameters |
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| 8 | // during growth gives even more curious things. |
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| 9 | // |
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| 10 | // Use 1-8 to change parameters, and 0 to reset to initial conditions |
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| 11 | |
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| 12 | #include "ExampleApplication.h" |
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| 13 | #include <OgreTexture.h> |
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| 14 | #include <OgreHardwarePixelBuffer.h> |
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| 15 | #include <OgreTextureManager.h> |
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| 16 | #include <OgreLogManager.h> |
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| 17 | #include <sstream> |
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| 18 | TexturePtr ptex; |
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| 19 | HardwarePixelBufferSharedPtr buffer; |
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| 20 | Overlay* overlay; |
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| 21 | static const int reactorExtent = 130; // must be 2^N + 2 |
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| 22 | uint32 clut[1024]; |
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| 23 | AnimationState *swim; |
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| 24 | // Nano fixed point library |
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| 25 | #define FROMFLOAT(X) ((int)((X)*((float)(1<<16)))) |
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| 26 | #define TOFLOAT(X) ((float)((X)/((float)(1<<16)))) |
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| 27 | #define MULT(X,Y) (((X)*(Y))>>16) |
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| 28 | ColourValue HSVtoRGB( float h, float s, float v ) |
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| 29 | { |
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| 30 | int i; |
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| 31 | ColourValue rv(0.0f, 0.0f, 0.0f, 1.0f); |
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| 32 | float f, p, q, t; |
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| 33 | h = fmodf(h, 360.0f); |
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| 34 | h /= 60.0f; // sector 0 to 5 |
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| 35 | i = (int)floor( h ); |
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| 36 | f = h - i; // factorial part of h |
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| 37 | p = v * ( 1.0f - s ); |
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| 38 | q = v * ( 1.0f - s * f ); |
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| 39 | t = v * ( 1.0f - s * ( 1.0f - f ) ); |
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| 40 | |
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| 41 | switch( i ) { |
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| 42 | case 0: rv.r = v; rv.g = t; rv.b = p; break; |
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| 43 | case 1: rv.r = q; rv.g = v; rv.b = p; break; |
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| 44 | case 2: rv.r = p; rv.g = v; rv.b = t; break; |
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| 45 | case 3: rv.r = p; rv.g = q; rv.b = v; break; |
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| 46 | case 4: rv.r = t; rv.g = p; rv.b = v; break; |
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| 47 | default: rv.r = v; rv.g = p; rv.b = q; break; |
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| 48 | } |
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| 49 | return rv; |
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| 50 | } |
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| 51 | class DynTexFrameListener : public ExampleFrameListener |
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| 52 | { |
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| 53 | private: |
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| 54 | static float fDefDim; |
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| 55 | static float fDefVel; |
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| 56 | float tim; |
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| 57 | |
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| 58 | int *chemical[2]; |
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| 59 | int *delta[2]; |
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| 60 | size_t mSize; |
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| 61 | int dt,hdiv0,hdiv1; // diffusion parameters |
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| 62 | int F,k; // reaction parameters |
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| 63 | |
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| 64 | bool rpressed; |
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| 65 | public: |
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| 66 | DynTexFrameListener(RenderWindow* win, Camera* cam) : ExampleFrameListener( win, cam ) |
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| 67 | { |
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| 68 | tim = 0; |
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| 69 | rpressed = false; |
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| 70 | // Create colour lookup |
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| 71 | for(unsigned int col=0; col<1024; col++) |
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| 72 | { |
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| 73 | ColourValue c; |
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| 74 | c = HSVtoRGB((1.0f-col/1024.0f)*90.0f+225.0f, 0.9f, 0.75f+0.25f*(1.0f-col/1024.0f)); |
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| 75 | c.a = 1.0f - col/1024.0f; |
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| 76 | PixelUtil::packColour(c, PF_A8R8G8B8, &clut[col]); |
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| 77 | } |
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| 78 | // Setup |
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| 79 | LogManager::getSingleton().logMessage("Creating chemical containment"); |
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| 80 | mSize = reactorExtent*reactorExtent; |
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| 81 | chemical[0] = new int [mSize]; |
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| 82 | chemical[1] = new int [mSize]; |
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| 83 | delta[0] = new int [mSize]; |
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| 84 | delta[1] = new int [mSize]; |
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| 85 | |
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| 86 | dt = FROMFLOAT(2.0f); |
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| 87 | hdiv0 = FROMFLOAT(2.0E-5f/(2.0f*0.01f*0.01f)); // a / (2.0f*h*h); -- really diffusion rate |
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| 88 | hdiv1 = FROMFLOAT(1.0E-5f/(2.0f*0.01f*0.01f)); // a / (2.0f*h*h); -- really diffusion rate |
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| 89 | //k = FROMFLOAT(0.056f); |
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| 90 | //F = FROMFLOAT(0.020f); |
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| 91 | k = FROMFLOAT(0.0619f); |
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| 92 | F = FROMFLOAT(0.0316f); |
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| 93 | |
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| 94 | resetReactor(); |
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| 95 | fireUpReactor(); |
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| 96 | updateInfoParamF(); |
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| 97 | updateInfoParamK(); |
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| 98 | updateInfoParamA0(); |
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| 99 | updateInfoParamA1(); |
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| 100 | |
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| 101 | LogManager::getSingleton().logMessage("Cthulhu dawn"); |
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| 102 | } |
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| 103 | void resetReactor() |
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| 104 | { |
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| 105 | LogManager::getSingleton().logMessage("Facilitating neutral start up conditions"); |
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| 106 | for(unsigned int x=0; x<mSize; x++) |
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| 107 | { |
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| 108 | chemical[0][x] = FROMFLOAT(1.0f); |
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| 109 | chemical[1][x] = FROMFLOAT(0.0f); |
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| 110 | } |
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| 111 | } |
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| 112 | void fireUpReactor() |
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| 113 | { |
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| 114 | LogManager::getSingleton().logMessage("Warning: reactor is being fired up"); |
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| 115 | int center = reactorExtent/2; |
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| 116 | for(unsigned int x=center-10; x<center+10; x++) |
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| 117 | { |
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| 118 | for(unsigned int y=center-10; y<center+10; y++) |
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| 119 | { |
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| 120 | chemical[0][y*reactorExtent+x] = FROMFLOAT(0.5f) + rand()%FROMFLOAT(0.1); |
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| 121 | chemical[1][y*reactorExtent+x] = FROMFLOAT(0.25f) + rand()%FROMFLOAT(0.1); |
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| 122 | } |
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| 123 | } |
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| 124 | LogManager::getSingleton().logMessage("Warning: reaction has begun"); |
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| 125 | } |
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| 126 | |
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| 127 | void runStep() |
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| 128 | { |
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| 129 | unsigned int x, y; |
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| 130 | for(x=0; x<mSize; x++) |
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| 131 | { |
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| 132 | delta[0][x] = 0; |
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| 133 | delta[1][x] = 0; |
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| 134 | } |
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| 135 | // Boundary conditions |
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| 136 | unsigned int idx; |
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| 137 | idx = 0; |
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| 138 | for(y=0; y<reactorExtent; y++) |
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| 139 | { |
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| 140 | chemical[0][idx] = chemical[0][idx+reactorExtent-2]; |
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| 141 | chemical[0][idx+reactorExtent-1] = chemical[0][idx+1]; |
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| 142 | chemical[1][idx] = chemical[1][idx+reactorExtent-2]; |
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| 143 | chemical[1][idx+reactorExtent-1] = chemical[1][idx+1]; |
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| 144 | idx += reactorExtent; |
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| 145 | } |
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| 146 | unsigned int skip = reactorExtent*(reactorExtent-1); |
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| 147 | for(y=0; y<reactorExtent; y++) |
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| 148 | { |
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| 149 | chemical[0][y] = chemical[0][y + skip - reactorExtent]; |
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| 150 | chemical[0][y + skip] = chemical[0][y + reactorExtent]; |
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| 151 | chemical[1][y] = chemical[1][y + skip - reactorExtent]; |
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| 152 | chemical[1][y + skip] = chemical[1][y + reactorExtent]; |
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| 153 | } |
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| 154 | // Diffusion |
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| 155 | idx = reactorExtent+1; |
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| 156 | for(y=0; y<reactorExtent-2; y++) |
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| 157 | { |
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| 158 | for(x=0; x<reactorExtent-2; x++) |
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| 159 | { |
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| 160 | delta[0][idx] += MULT(chemical[0][idx-reactorExtent] + chemical[0][idx-1] |
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| 161 | -4*chemical[0][idx] + chemical[0][idx+1] |
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| 162 | +chemical[0][idx+reactorExtent], hdiv0); |
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| 163 | delta[1][idx] += MULT(chemical[1][idx-reactorExtent] + chemical[1][idx-1] |
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| 164 | -4*chemical[1][idx] + chemical[1][idx+1] |
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| 165 | +chemical[1][idx+reactorExtent], hdiv1); |
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| 166 | idx++; |
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| 167 | } |
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| 168 | idx += 2; |
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| 169 | } |
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| 170 | // Reaction (Grey-Scott) |
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| 171 | idx = reactorExtent+1; |
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| 172 | int U,V; |
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| 173 | |
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| 174 | for(y=0; y<reactorExtent-2; y++) |
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| 175 | { |
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| 176 | for(x=0; x<reactorExtent-2; x++) |
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| 177 | { |
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| 178 | U = chemical[0][idx]; V = chemical[1][idx]; |
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| 179 | int UVV = MULT(MULT(U,V),V); |
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| 180 | delta[0][idx] += -UVV + MULT(F,(1<<16)-U); |
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| 181 | delta[1][idx] += UVV - MULT(F+k,V); |
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| 182 | idx++; |
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| 183 | } |
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| 184 | idx += 2; |
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| 185 | } |
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| 186 | // Update concentrations |
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| 187 | for(x=0; x<mSize; x++) |
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| 188 | { |
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| 189 | chemical[0][x] += MULT(delta[0][x], dt); |
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| 190 | chemical[1][x] += MULT(delta[1][x], dt); |
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| 191 | } |
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| 192 | } |
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| 193 | |
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| 194 | void buildTexture() |
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| 195 | { |
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| 196 | buffer->lock(HardwareBuffer::HBL_DISCARD); |
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| 197 | const PixelBox &pb = buffer->getCurrentLock(); |
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| 198 | unsigned int idx = reactorExtent+1; |
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| 199 | for(unsigned int y=0; y<(reactorExtent-2); y++) { |
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| 200 | uint32 *data = static_cast<uint32*>(pb.data) + y*pb.rowPitch; |
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| 201 | int *chem = &chemical[0][idx]; |
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| 202 | for(unsigned int x=0; x<(reactorExtent-2); x++) { |
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| 203 | data[x] = clut[(chem[x]>>6)&1023]; |
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| 204 | } |
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| 205 | idx += reactorExtent; |
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| 206 | } |
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| 207 | buffer->unlock(); |
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| 208 | } |
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| 209 | // GUI updaters |
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| 210 | void updateInfoParamK() |
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| 211 | { |
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| 212 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_K") \ |
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| 213 | ->setCaption("[1/2]k: "+StringConverter::toString(TOFLOAT(k))); |
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| 214 | } |
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| 215 | void updateInfoParamF() |
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| 216 | { |
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| 217 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_F") \ |
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| 218 | ->setCaption("[3/4]F: "+StringConverter::toString(TOFLOAT(F))); |
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| 219 | } |
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| 220 | void updateInfoParamA0() |
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| 221 | { |
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| 222 | // Diffusion rate for chemical 1 |
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| 223 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_A0") \ |
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| 224 | ->setCaption("[5/6]Diffusion 1: "+StringConverter::toString(TOFLOAT(hdiv0))); |
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| 225 | } |
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| 226 | void updateInfoParamA1() |
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| 227 | { |
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| 228 | // Diffusion rate for chemical 2 |
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| 229 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_A1") \ |
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| 230 | ->setCaption("[7/8]Diffusion 2: "+StringConverter::toString(TOFLOAT(hdiv1))); |
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| 231 | } |
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| 232 | |
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| 233 | bool frameStarted( const FrameEvent& evt ) |
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| 234 | { |
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| 235 | using namespace OIS; |
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| 236 | if( ExampleFrameListener::frameStarted( evt ) == false ) |
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| 237 | return false; |
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| 238 | |
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| 239 | if( mKeyboard->isKeyDown( KC_1 ) ) { |
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| 240 | k -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 241 | updateInfoParamK(); |
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| 242 | } |
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| 243 | if( mKeyboard->isKeyDown( KC_2 ) ) { |
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| 244 | k += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 245 | updateInfoParamK(); |
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| 246 | } |
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| 247 | if( mKeyboard->isKeyDown( KC_3 ) ) { |
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| 248 | F -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 249 | updateInfoParamF(); |
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| 250 | } |
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| 251 | if( mKeyboard->isKeyDown( KC_4 ) ) { |
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| 252 | F += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 253 | updateInfoParamF(); |
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| 254 | } |
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| 255 | if( mKeyboard->isKeyDown( KC_5 ) ) { |
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| 256 | hdiv0 -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 257 | updateInfoParamA0(); |
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| 258 | } |
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| 259 | if( mKeyboard->isKeyDown( KC_6 ) ) { |
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| 260 | hdiv0 += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 261 | updateInfoParamA0(); |
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| 262 | } |
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| 263 | if( mKeyboard->isKeyDown( KC_7 ) ) { |
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| 264 | hdiv1 -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 265 | updateInfoParamA1(); |
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| 266 | } |
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| 267 | if( mKeyboard->isKeyDown( KC_8 ) ) { |
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| 268 | hdiv1 += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
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| 269 | updateInfoParamA1(); |
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| 270 | } |
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| 271 | |
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| 272 | if( mKeyboard->isKeyDown( KC_0 ) && !rpressed ) { |
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| 273 | // Reset 0 |
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| 274 | resetReactor(); |
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| 275 | fireUpReactor(); |
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| 276 | rpressed = true; |
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| 277 | } else { |
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| 278 | rpressed = false; |
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| 279 | } |
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| 280 | for(int x=0; x<10; x++) |
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| 281 | runStep(); |
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| 282 | buildTexture(); |
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| 283 | swim->addTime(evt.timeSinceLastFrame); |
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| 284 | |
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| 285 | return true; |
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| 286 | } |
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| 287 | |
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| 288 | virtual ~DynTexFrameListener(void) |
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| 289 | { |
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| 290 | delete [] chemical[0]; |
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| 291 | delete [] chemical[1]; |
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| 292 | delete [] delta[0]; |
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| 293 | delete [] delta[1]; |
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| 294 | } |
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| 295 | }; |
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| 296 | |
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| 297 | float DynTexFrameListener::fDefDim = 25.0f; |
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| 298 | float DynTexFrameListener::fDefVel = 50.0f; |
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| 299 | |
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| 300 | class DynTexApplication : public ExampleApplication |
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| 301 | { |
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| 302 | public: |
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| 303 | DynTexApplication() {} |
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| 304 | |
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| 305 | protected: |
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| 306 | |
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| 307 | |
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| 308 | virtual void createFrameListener(void) |
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| 309 | { |
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| 310 | mFrameListener= new DynTexFrameListener(mWindow, mCamera); |
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| 311 | mFrameListener->showDebugOverlay(true); |
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| 312 | mRoot->addFrameListener(mFrameListener); |
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| 313 | } |
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| 314 | |
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| 315 | |
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| 316 | virtual void createViewports(void) |
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| 317 | { |
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| 318 | // Create one viewport, entire window |
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| 319 | Viewport* vp = mWindow->addViewport(mCamera); |
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| 320 | vp->setBackgroundColour(ColourValue(0,0,0)); |
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| 321 | |
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| 322 | // Alter the camera aspect ratio to match the viewport |
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| 323 | mCamera->setAspectRatio( |
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| 324 | Real(vp->getActualWidth()) / Real(vp->getActualHeight())); |
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| 325 | } |
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| 326 | |
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| 327 | // Just override the mandatory create scene method |
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| 328 | void createScene(void) |
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| 329 | { |
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| 330 | // Create dynamic texture |
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| 331 | ptex = TextureManager::getSingleton().createManual( |
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| 332 | "DynaTex","General", TEX_TYPE_2D, reactorExtent-2, reactorExtent-2, 0, PF_A8R8G8B8, |
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| 333 | TU_DYNAMIC_WRITE_ONLY); |
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| 334 | buffer = ptex->getBuffer(0, 0); |
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| 335 | |
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| 336 | // Set ambient light |
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| 337 | mSceneMgr->setAmbientLight(ColourValue(0.6, 0.6, 0.6)); |
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| 338 | mSceneMgr->setSkyBox(true, "Examples/SpaceSkyBox", 50 ); |
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| 339 | |
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| 340 | //mRoot->getRenderSystem()->clearFrameBuffer(FBT_COLOUR, ColourValue(255,255,255,0)); |
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| 341 | |
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| 342 | // Create a light |
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| 343 | Light* l = mSceneMgr->createLight("MainLight"); |
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| 344 | l->setDiffuseColour(0.75, 0.75, 0.80); |
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| 345 | l->setSpecularColour(0.9, 0.9, 1); |
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| 346 | l->setPosition(-100,80,50); |
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| 347 | mSceneMgr->getRootSceneNode()->attachObject(l); |
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| 348 | |
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| 349 | |
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| 350 | Entity *planeEnt = mSceneMgr->createEntity("TexPlane1", Ogre::SceneManager::PT_PLANE); |
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| 351 | // Give the plane a texture |
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| 352 | planeEnt->setMaterialName("Examples/DynaTest"); |
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| 353 | |
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| 354 | SceneNode* node = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-100,-40,-100)); |
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| 355 | node->attachObject(planeEnt); |
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| 356 | node->setScale(3.0f, 3.0f, 3.0f); |
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| 357 | |
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| 358 | // Create objects |
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| 359 | SceneNode *blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-200,0,50)); |
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| 360 | Entity *ent2 = mSceneMgr->createEntity( "knot", "knot.mesh" ); |
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| 361 | ent2->setMaterialName("Examples/DynaTest4"); |
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| 362 | blaNode->attachObject( ent2 ); |
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| 363 | |
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| 364 | blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(200,-90,50)); |
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| 365 | ent2 = mSceneMgr->createEntity( "knot2", "knot.mesh" ); |
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| 366 | ent2->setMaterialName("Examples/DynaTest2"); |
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| 367 | blaNode->attachObject( ent2 ); |
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| 368 | blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-110,200,50)); |
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| 369 | |
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| 370 | // Cloaked fish |
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| 371 | ent2 = mSceneMgr->createEntity( "knot3", "fish.mesh" ); |
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| 372 | ent2->setMaterialName("Examples/DynaTest3"); |
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| 373 | swim = ent2->getAnimationState("swim"); |
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| 374 | swim->setEnabled(true); |
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| 375 | blaNode->attachObject( ent2 ); |
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| 376 | blaNode->setScale(50.0f, 50.0f, 50.0f); |
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| 377 | |
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| 378 | |
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| 379 | //TextureManager::getSingleton().getByName("RustySteel.jpg"); |
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| 380 | |
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| 381 | |
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| 382 | std::stringstream d; |
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| 383 | d << "HardwarePixelBuffer " << buffer->getWidth() << " " << buffer->getHeight() << " " << buffer->getDepth(); |
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| 384 | LogManager::getSingleton().logMessage(d.str()); |
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| 385 | |
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| 386 | buffer->lock(HardwareBuffer::HBL_NORMAL); |
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| 387 | const PixelBox &pb = buffer->getCurrentLock(); |
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| 388 | d.str(""); |
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| 389 | d << "PixelBox " << pb.getWidth() << " " << pb.getHeight() << " " << pb.getDepth() << " " << pb.rowPitch << " " << pb.slicePitch << " " << pb.data << " " << PixelUtil::getFormatName(pb.format); |
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| 390 | LogManager::getSingleton().logMessage(d.str()); |
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| 391 | buffer->unlock(); |
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| 392 | |
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| 393 | // show GUI |
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| 394 | overlay = OverlayManager::getSingleton().getByName("Example/DynTexOverlay"); |
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| 395 | overlay->show(); |
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| 396 | } |
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| 397 | |
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| 398 | void destroyScene(void) |
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| 399 | { |
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| 400 | // Free resource pointers before shutdown |
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| 401 | ptex.setNull(); |
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| 402 | buffer.setNull(); |
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| 403 | } |
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| 404 | |
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| 405 | }; |
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| 406 | |
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| 407 | #ifdef __cplusplus |
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| 408 | extern "C" { |
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| 409 | #endif |
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| 410 | |
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| 411 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 |
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| 412 | #define WIN32_LEAN_AND_MEAN |
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| 413 | #include "windows.h" |
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| 414 | |
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| 415 | INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT ) |
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| 416 | #else |
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| 417 | int main(int argc, char *argv[]) |
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| 418 | #endif |
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| 419 | { |
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| 420 | // Create application object |
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| 421 | DynTexApplication app; |
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| 422 | |
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| 423 | try { |
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| 424 | app.go(); |
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| 425 | } catch( Ogre::Exception& e ) { |
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| 426 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 |
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| 427 | MessageBox( NULL, e.getFullDescription().c_str(), "An exception has occured!", MB_OK | MB_ICONERROR | MB_TASKMODAL); |
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| 428 | #else |
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| 429 | std::cerr << "An exception has occured: " << |
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| 430 | e.getFullDescription().c_str() << std::endl; |
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| 431 | #endif |
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| 432 | } |
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| 433 | |
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| 434 | return 0; |
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| 435 | } |
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| 436 | |
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| 437 | #ifdef __cplusplus |
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| 438 | } |
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| 439 | #endif |
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