[692] | 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 | bool bOK = ExampleFrameListener::frameStarted( evt );
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| 236 |
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| 237 | if( mInputDevice->isKeyDown( KC_1 ) ) {
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| 238 | k -= FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 239 | updateInfoParamK();
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| 240 | }
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| 241 | if( mInputDevice->isKeyDown( KC_2 ) ) {
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| 242 | k += FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 243 | updateInfoParamK();
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| 244 | }
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| 245 | if( mInputDevice->isKeyDown( KC_3 ) ) {
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| 246 | F -= FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 247 | updateInfoParamF();
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| 248 | }
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| 249 | if( mInputDevice->isKeyDown( KC_4 ) ) {
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| 250 | F += FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 251 | updateInfoParamF();
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| 252 | }
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| 253 | if( mInputDevice->isKeyDown( KC_5 ) ) {
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| 254 | hdiv0 -= FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 255 | updateInfoParamA0();
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| 256 | }
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| 257 | if( mInputDevice->isKeyDown( KC_6 ) ) {
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| 258 | hdiv0 += FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 259 | updateInfoParamA0();
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| 260 | }
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| 261 | if( mInputDevice->isKeyDown( KC_7 ) ) {
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| 262 | hdiv1 -= FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 263 | updateInfoParamA1();
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| 264 | }
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| 265 | if( mInputDevice->isKeyDown( KC_8 ) ) {
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| 266 | hdiv1 += FROMFLOAT(0.005f*evt.timeSinceLastFrame);
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| 267 | updateInfoParamA1();
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| 268 | }
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| 269 |
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| 270 | if( mInputDevice->isKeyDown( KC_0 ) && !rpressed ) {
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| 271 | // Reset 0
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| 272 | resetReactor();
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| 273 | fireUpReactor();
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| 274 | rpressed = true;
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| 275 | } else {
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| 276 | rpressed = false;
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| 277 | }
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| 278 | for(int x=0; x<10; x++)
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| 279 | runStep();
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| 280 | buildTexture();
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| 281 | swim->addTime(evt.timeSinceLastFrame);
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| 282 |
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| 283 | return bOK;
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| 284 | }
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| 285 |
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| 286 | virtual ~DynTexFrameListener(void)
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| 287 | {
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| 288 | delete [] chemical[0];
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| 289 | delete [] chemical[1];
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| 290 | delete [] delta[0];
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| 291 | delete [] delta[1];
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| 292 | }
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| 293 | };
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| 294 |
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| 295 | float DynTexFrameListener::fDefDim = 25.0f;
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| 296 | float DynTexFrameListener::fDefVel = 50.0f;
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| 297 |
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| 298 | class DynTexApplication : public ExampleApplication
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| 299 | {
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| 300 | public:
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| 301 | DynTexApplication() {}
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| 302 |
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| 303 | protected:
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| 304 |
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| 305 |
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| 306 | virtual void createFrameListener(void)
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| 307 | {
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| 308 | mFrameListener= new DynTexFrameListener(mWindow, mCamera);
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| 309 | mFrameListener->showDebugOverlay(true);
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| 310 | mRoot->addFrameListener(mFrameListener);
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| 311 | }
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| 312 |
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| 313 |
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| 314 | virtual void createViewports(void)
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| 315 | {
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| 316 | // Create one viewport, entire window
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| 317 | Viewport* vp = mWindow->addViewport(mCamera);
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| 318 | vp->setBackgroundColour(ColourValue(0,0,0));
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| 319 |
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| 320 | // Alter the camera aspect ratio to match the viewport
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| 321 | mCamera->setAspectRatio(
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| 322 | Real(vp->getActualWidth()) / Real(vp->getActualHeight()));
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| 323 | }
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| 324 |
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| 325 | // Just override the mandatory create scene method
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| 326 | void createScene(void)
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| 327 | {
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| 328 | // Create dynamic texture
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| 329 | ptex = TextureManager::getSingleton().createManual(
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| 330 | "DynaTex","General", TEX_TYPE_2D, reactorExtent-2, reactorExtent-2, 0, PF_A8R8G8B8,
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| 331 | TU_DYNAMIC_WRITE_ONLY);
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| 332 | buffer = ptex->getBuffer(0, 0);
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| 333 |
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| 334 | // Set ambient light
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| 335 | mSceneMgr->setAmbientLight(ColourValue(0.6, 0.6, 0.6));
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| 336 | mSceneMgr->setSkyBox(true, "Examples/SpaceSkyBox", 50 );
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| 337 |
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| 338 | //mRoot->getRenderSystem()->clearFrameBuffer(FBT_COLOUR, ColourValue(255,255,255,0));
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| 339 |
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| 340 | // Create a light
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| 341 | Light* l = mSceneMgr->createLight("MainLight");
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| 342 | l->setDiffuseColour(0.75, 0.75, 0.80);
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| 343 | l->setSpecularColour(0.9, 0.9, 1);
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| 344 | l->setPosition(-100,80,50);
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| 345 | mSceneMgr->getRootSceneNode()->attachObject(l);
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| 346 |
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| 347 |
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| 348 | Entity *planeEnt = mSceneMgr->createEntity("TexPlane1", Ogre::SceneManager::PT_PLANE);
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| 349 | // Give the plane a texture
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| 350 | planeEnt->setMaterialName("Examples/DynaTest");
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| 351 |
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| 352 | SceneNode* node = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-100,-40,-100));
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| 353 | node->attachObject(planeEnt);
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| 354 | node->setScale(3.0f, 3.0f, 3.0f);
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| 355 |
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| 356 | // Create objects
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| 357 | SceneNode *blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-200,0,50));
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| 358 | Entity *ent2 = mSceneMgr->createEntity( "knot", "knot.mesh" );
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| 359 | ent2->setMaterialName("Examples/DynaTest4");
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| 360 | blaNode->attachObject( ent2 );
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| 361 |
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| 362 | blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(200,-90,50));
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| 363 | ent2 = mSceneMgr->createEntity( "knot2", "knot.mesh" );
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| 364 | ent2->setMaterialName("Examples/DynaTest2");
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| 365 | blaNode->attachObject( ent2 );
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| 366 | blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-110,200,50));
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| 367 |
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| 368 | // Cloaked fish
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| 369 | ent2 = mSceneMgr->createEntity( "knot3", "fish.mesh" );
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| 370 | ent2->setMaterialName("Examples/DynaTest3");
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| 371 | swim = ent2->getAnimationState("swim");
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| 372 | swim->setEnabled(true);
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| 373 | blaNode->attachObject( ent2 );
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| 374 | blaNode->setScale(50.0f, 50.0f, 50.0f);
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| 375 |
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| 376 |
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| 377 | //TextureManager::getSingleton().getByName("RustySteel.jpg");
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| 378 |
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| 379 |
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| 380 | std::stringstream d;
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| 381 | d << "HardwarePixelBuffer " << buffer->getWidth() << " " << buffer->getHeight() << " " << buffer->getDepth();
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| 382 | LogManager::getSingleton().logMessage(d.str());
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| 383 |
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| 384 | buffer->lock(HardwareBuffer::HBL_NORMAL);
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| 385 | const PixelBox &pb = buffer->getCurrentLock();
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| 386 | d.str("");
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| 387 | d << "PixelBox " << pb.getWidth() << " " << pb.getHeight() << " " << pb.getDepth() << " " << pb.rowPitch << " " << pb.slicePitch << " " << pb.data << " " << PixelUtil::getFormatName(pb.format);
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| 388 | LogManager::getSingleton().logMessage(d.str());
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| 389 | buffer->unlock();
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| 390 |
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| 391 | // show GUI
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| 392 | overlay = OverlayManager::getSingleton().getByName("Example/DynTexOverlay");
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| 393 | overlay->show();
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| 394 | }
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| 395 |
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| 396 | void destroyScene(void)
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| 397 | {
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| 398 | // Free resource pointers before shutdown
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| 399 | ptex.setNull();
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| 400 | buffer.setNull();
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| 401 | }
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| 402 |
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| 403 | };
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| 404 |
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| 405 | #ifdef __cplusplus
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| 406 | extern "C" {
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| 407 | #endif
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| 408 |
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| 409 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
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| 410 | #define WIN32_LEAN_AND_MEAN
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| 411 | #include "windows.h"
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| 412 |
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| 413 | INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
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| 414 | #else
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| 415 | int main(int argc, char *argv[])
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| 416 | #endif
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| 417 | {
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| 418 | // Create application object
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| 419 | DynTexApplication app;
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| 420 |
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| 421 | SET_TERM_HANDLER;
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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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