[1944] | 1 | #include "glInterface.h"
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| 2 | #include "GlobalLinesRenderer.h"
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| 3 | #include "common.h"
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| 4 | #include "RenderTexture.h"
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| 5 | #include "Preprocessor.h"
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| 6 | #include "GlRenderer.h"
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| 7 |
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| 8 | #include <Cg/cg.h>
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| 9 | #include <Cg/cgGL.h>
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| 10 |
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| 11 | //#include <QtOpenGL>
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| 12 |
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| 13 | namespace GtpVisibilityPreprocessor {
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| 14 |
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| 15 |
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| 16 | static CGcontext sCgContext = NULL;
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| 17 | static CGprogram sCgDepthPeelingProgram = NULL;
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| 18 | static CGprogram sCgPassThroughProgram = NULL;
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| 19 |
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| 20 | static CGprofile sCgFragmentProfile;
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| 21 | static CGparameter sTextureParam;
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| 22 |
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| 23 | GlobalLinesRenderer *globalLinesRenderer = NULL;
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| 24 |
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| 25 |
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| 26 | static void cgErrorCallback()
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| 27 | {
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| 28 | CGerror lastError = cgGetError();
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| 29 |
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| 30 | if(lastError)
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| 31 | {
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| 32 | printf("%s\n\n", cgGetErrorString(lastError));
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| 33 | printf("%s\n", cgGetLastListing(sCgContext));
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| 34 | printf("Cg error, exiting...\n");
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| 35 |
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| 36 | exit(0);
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| 37 | }
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| 38 | }
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| 39 |
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| 40 | static void PrintGLerror(char *msg)
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| 41 | {
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| 42 | GLenum errCode;
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| 43 | const GLubyte *errStr;
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| 44 |
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| 45 | if ((errCode = glGetError()) != GL_NO_ERROR)
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| 46 | {
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| 47 | errStr = gluErrorString(errCode);
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| 48 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
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| 49 | }
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| 50 | }
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| 51 |
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| 52 |
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| 53 | void Reshape(int w, int h)
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| 54 | {
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| 55 | if (h == 0) h = 1;
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| 56 |
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| 57 | glViewport(0, 0, w, h);
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| 58 |
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| 59 | glMatrixMode(GL_PROJECTION);
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| 60 | glLoadIdentity();
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| 61 |
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[1949] | 62 | //gluPerspective(60.0, (GLfloat)w/(GLfloat)h, 3, 5000.0);
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[1944] | 63 | //gluPerspective(60.0, (GLfloat)w/(GLfloat)h, 0.5, 10.0);
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[1949] | 64 | glOrtho(-1000, 1000, -1000, 1000, 1, 1000);
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[1944] | 65 | }
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| 66 |
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| 67 |
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| 68 | void Display()
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| 69 | {
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| 70 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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| 71 | glMatrixMode(GL_MODELVIEW);
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| 72 | glPushMatrix();
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| 73 |
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| 74 | //globalLinesRenderer->DrawGeometry();
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| 75 |
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| 76 | globalLinesRenderer->CastGlobalLines(Beam(), 0);
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| 77 |
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| 78 | PrintGLerror("display");
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| 79 |
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| 80 | glPopMatrix();
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| 81 | glutSwapBuffers();
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| 82 | }
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| 83 |
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| 84 |
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| 85 | void Idle()
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| 86 | {
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| 87 | glutPostRedisplay();
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| 88 | }
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| 89 |
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| 90 |
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| 91 | void Keyboard(unsigned char key, int x, int y)
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| 92 | {
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| 93 | switch(key)
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| 94 | {
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[1949] | 95 | case '2':
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| 96 | ++ globalLinesRenderer->mMaxDepth;
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| 97 | cout << "max depth: " << globalLinesRenderer->mMaxDepth << endl;
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[1944] | 98 | return;
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[1949] | 99 | case '1':
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| 100 | -- globalLinesRenderer->mMaxDepth;
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| 101 | cout << "max depth: " << globalLinesRenderer->mMaxDepth << endl;
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| 102 | return;
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[1944] | 103 | default:
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| 104 | return;
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| 105 | }
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| 106 | }
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| 107 |
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| 108 | /*GlobalLinesRenderer::GlobalLinesRenderer(RenderTexture *buffer1,
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| 109 | RenderTexture *buffer2,
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| 110 | Preprocessor *preprocessor,
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| 111 | GlRenderer *renderer)
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| 112 | : mNewBuffer(buffer1), mOldBuffer(buffer2), mPreprocessor(preprocessor), mMaxDepth(100),
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| 113 | mRenderer(renderer)
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| 114 | {
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| 115 | }
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| 116 | */
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[1949] | 117 | GlobalLinesRenderer::GlobalLinesRenderer(Preprocessor *preprocessor,
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| 118 | GlRenderer *renderer):
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[1944] | 119 | mNewBuffer(NULL),
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| 120 | mOldBuffer(NULL),
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[1949] | 121 | mMaxDepth(0),
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[1944] | 122 | mRenderer(renderer),
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| 123 | mPreprocessor(preprocessor)
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| 124 | {
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| 125 | }
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| 126 |
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| 127 |
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| 128 | GlobalLinesRenderer::~GlobalLinesRenderer()
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| 129 | {
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| 130 | if (sCgDepthPeelingProgram)
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| 131 | cgDestroyProgram(sCgDepthPeelingProgram);
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| 132 | if (sCgContext)
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| 133 | cgDestroyContext(sCgContext);
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| 134 | }
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| 135 |
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| 136 |
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| 137 | void GlobalLinesRenderer::CastGlobalLines(Beam &beam, const int samples)
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| 138 | {
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| 139 | // bind pixel shader implementing the front depth buffer functionality
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| 140 | ApplyDepthPeeling(beam, samples);
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| 141 | }
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| 142 |
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| 143 |
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| 144 | void GlobalLinesRenderer::RenderObject(Intersectable *obj)
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| 145 | {
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| 146 | mRenderer->RenderIntersectable(obj);
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| 147 | }
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| 148 |
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| 149 |
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| 150 | void GlobalLinesRenderer::DrawGeometry()
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[1945] | 151 | {
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| 152 | //mRenderer->mUseFalseColors = true;
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[1944] | 153 | ObjectContainer::const_iterator oit, oit_end = mPreprocessor->mObjects.end();
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| 154 |
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| 155 | Intersectable::NewMail();
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| 156 |
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| 157 | for (oit = mPreprocessor->mObjects.begin(); oit != oit_end; ++ oit)
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| 158 | {
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| 159 | RenderObject(*oit);
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| 160 | }
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| 161 | }
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| 162 |
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| 163 |
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| 164 | void GlobalLinesRenderer::SwitchRenderTextures()
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| 165 | {
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| 166 | RenderTexture *buffer = mOldBuffer;
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| 167 | mOldBuffer = mNewBuffer;
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| 168 | mNewBuffer = buffer;
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| 169 | }
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| 170 |
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| 171 |
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| 172 | void GlobalLinesRenderer::InitGl()
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| 173 | {
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| 174 | glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
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| 175 | glutInitWindowPosition(50, 50);
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| 176 | glutInitWindowSize(512, 512);
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| 177 | glutCreateWindow("TestRenderDepthTexture");
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| 178 |
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| 179 | int err = glewInit();
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| 180 | if (GLEW_OK != err)
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| 181 | {
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| 182 | // problem: glewInit failed, something is seriously wrong
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| 183 | fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err));
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| 184 | exit(-1);
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| 185 | }
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| 186 |
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| 187 | glutKeyboardFunc(Keyboard);
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| 188 | glutDisplayFunc(Display);
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| 189 | glutIdleFunc(Idle);
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| 190 | glutReshapeFunc(Reshape);
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| 191 |
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| 192 | Reshape(512, 512);
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| 193 | glMatrixMode(GL_MODELVIEW);
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| 194 | glLoadIdentity();
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| 195 |
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| 196 | AxisAlignedBox3 bbox = globalLinesRenderer->mPreprocessor->mKdTree->GetBox();
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| 197 | const Vector3 midPoint = bbox.Center();
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[1949] | 198 | //const Vector3 viewPoint = midPoint + Vector3(-800, 0, 0);
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| 199 | const Vector3 viewPoint = midPoint + Vector3(2, 0, 0);
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[1944] | 200 |
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| 201 | cout << "midPoint: " << midPoint << endl;
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| 202 | cout << "viewPoint: " << viewPoint << endl;
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| 203 | cout << "scene: " << bbox << endl;
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| 204 |
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| 205 | /*gluLookAt(viewPoint.x, viewPoint.y, viewPoint.z,
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| 206 | midPoint.x, midPoint.y, midPoint.z,
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| 207 | 0, 1, 0);
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| 208 | */
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| 209 | gluLookAt(0, 0, 3, 0, 0, 0, 0, 1, 0);
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| 210 |
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[1949] | 211 | //glDisable(GL_CULL_FACE);
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| 212 | glEnable(GL_CULL_FACE);
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[1944] | 213 | glDisable(GL_LIGHTING);
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| 214 | //glEnable(GL_COLOR_MATERIAL);
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| 215 | glDisable(GL_COLOR_MATERIAL);
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| 216 | glEnable(GL_DEPTH_TEST);
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| 217 | glClearColor(0.1, 0.2, 0.3, 1);
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| 218 |
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| 219 | int texWidth = 256, texHeight = 256;
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| 220 |
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| 221 | // A square, mipmapped, anisotropically filtered 8-bit RGBA texture with
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| 222 | // depth and stencil.
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| 223 | // Note that RT_COPY_TO_TEXTURE is required for depth textures on ATI hardware
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| 224 |
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| 225 | mNewBuffer = new RenderTexture(texWidth, texHeight, true, true);
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[1949] | 226 | //mNewBuffer->Initialize(true, true, false, true, true, 8, 8, 8, 8);//, RenderTexture::RT_COPY_TO_TEXTURE);
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| 227 | mNewBuffer->Initialize(true, true, false, true, true, 8, 8, 8, 8, RenderTexture::RT_COPY_TO_TEXTURE);
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| 228 |
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[1944] | 229 | mOldBuffer = new RenderTexture(texWidth, texHeight, true, true);
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[1949] | 230 | //mOldBuffer ->Initialize(true, true, false, true, true, 8, 8, 8, 8);//, RenderTexture::RT_COPY_TO_TEXTURE);
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| 231 | mOldBuffer ->Initialize(true, true, false, true, true, 8, 8, 8, 8, RenderTexture::RT_COPY_TO_TEXTURE);
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[1944] | 232 |
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| 233 | // Setup Cg
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| 234 | cgSetErrorCallback(cgErrorCallback);
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| 235 |
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| 236 | // Create cgContext.
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| 237 | sCgContext = cgCreateContext();
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| 238 |
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| 239 | // get the best profile for this hardware
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| 240 | sCgFragmentProfile = cgGLGetLatestProfile(CG_GL_FRAGMENT);
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| 241 |
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| 242 | //assert(sCgFragmentProfile != CG_PROFILE_UNKNOWN);
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| 243 | cgGLSetOptimalOptions(sCgFragmentProfile);
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| 244 |
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| 245 | sCgDepthPeelingProgram =
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| 246 | cgCreateProgramFromFile(sCgContext,
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| 247 | CG_SOURCE,
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| 248 | "../src/depth_peeling.cg",
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| 249 | GLEW_ARB_fragment_program ? CG_PROFILE_ARBFP1 : CG_PROFILE_FP30,
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| 250 | NULL,
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| 251 | NULL);
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| 252 |
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| 253 | if(sCgDepthPeelingProgram != NULL)
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| 254 | {
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| 255 | cgGLLoadProgram(sCgDepthPeelingProgram);
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| 256 | sTextureParam = cgGetNamedParameter(sCgDepthPeelingProgram, "depthTex");
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| 257 | }
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| 258 |
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| 259 | sCgPassThroughProgram =
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| 260 | cgCreateProgramFromFile(sCgContext,
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| 261 | CG_SOURCE,
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| 262 | "../src/passthrough.cg",
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| 263 | GLEW_ARB_fragment_program ? CG_PROFILE_ARBFP1 : CG_PROFILE_FP30,
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| 264 | NULL,
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| 265 | NULL);
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| 266 |
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| 267 | if(sCgPassThroughProgram != NULL)
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| 268 | {
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| 269 | cgGLLoadProgram(sCgPassThroughProgram);
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| 270 | }
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| 271 |
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| 272 |
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| 273 | // setup the rendering context for the RenderTexture
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| 274 | mNewBuffer->BeginCapture();
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| 275 | {
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| 276 | Reshape(texWidth, texHeight);
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| 277 | glClearColor(0.1, 0.7, 0.2, 1);
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| 278 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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[1949] | 279 |
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| 280 | glFrontFace(GL_CCW);
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| 281 | glCullFace(GL_BACK);
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| 282 | glEnable(GL_CULL_FACE);
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| 283 | glShadeModel(GL_FLAT);
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| 284 | glEnable(GL_DEPTH_TEST);
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| 285 |
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[1944] | 286 | glMatrixMode(GL_MODELVIEW);
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| 287 | glLoadIdentity();
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| 288 | gluLookAt(viewPoint.x, viewPoint.y, viewPoint.z,
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| 289 | midPoint.x, midPoint.y, midPoint.z,
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| 290 | 0, 1, 0);
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[1945] | 291 |
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[1944] | 292 | }
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| 293 | mNewBuffer->EndCapture();
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| 294 |
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| 295 | // setup the rendering context for the RenderTexture
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| 296 | mOldBuffer->BeginCapture();
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| 297 | {
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| 298 | Reshape(texWidth, texHeight);
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| 299 | glMatrixMode(GL_MODELVIEW);
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| 300 | glLoadIdentity();
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[1949] | 301 |
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| 302 | glFrontFace(GL_CCW);
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| 303 | glCullFace(GL_BACK);
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| 304 | glEnable(GL_CULL_FACE);
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| 305 | glShadeModel(GL_FLAT);
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| 306 | glEnable(GL_DEPTH_TEST);
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| 307 |
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[1944] | 308 | gluLookAt(viewPoint.x, viewPoint.y, viewPoint.z,
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| 309 | midPoint.x, midPoint.y, midPoint.z,
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| 310 | 0, 1, 0);
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| 311 |
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| 312 | glClearColor(0.6, 0.2, 0.2, 1);
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| 313 | }
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| 314 | mOldBuffer->EndCapture();
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| 315 |
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| 316 | PrintGLerror("init");
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| 317 | }
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| 318 |
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| 319 |
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| 320 | void GlobalLinesRenderer::ProcessDepthBuffer()
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| 321 | {
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| 322 | }
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| 323 |
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| 324 |
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| 325 | void GlobalLinesRenderer::Run()
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| 326 | {
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| 327 | glutMainLoop();
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| 328 | }
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| 329 |
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| 330 |
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| 331 | void GlobalLinesRenderer::ApplyDepthPeeling(Beam &beam, const int samples)
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| 332 | {
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| 333 | //if (mNewBuffer->IsDoubleBuffered())
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| 334 | // glDrawBuffer(GL_BACK);
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| 335 |
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| 336 | mNewBuffer->BeginCapture();
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| 337 | {
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| 338 | //cgGLBindProgram(sCgPassThroughProgram);
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| 339 | //cgGLEnableProfile(sCgFragmentProfile);
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| 340 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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| 341 | glMatrixMode(GL_MODELVIEW);
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| 342 | glPushMatrix();
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[1945] | 343 | {
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| 344 | //glutSolidTorus(0.25, 1, 32, 64);
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[1944] | 345 | DrawGeometry();
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| 346 | }
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| 347 | glPopMatrix();
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| 348 | }
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| 349 | mNewBuffer->EndCapture();
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| 350 |
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[1949] | 351 | //mNewBuffer->BindDepth();
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| 352 | //float data[262144];
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| 353 | //glGetTexImage(mNewBuffer->GetTextureTarget(), 0, mNewBuffer->texture_format, GL_FLOAT, data);
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| 354 | if (mNewBuffer->IsRectangleTexture()) cout << "rect" << endl;
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| 355 | //else cout << "haga"<<endl;
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[1944] | 356 |
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[1949] | 357 | for(int i = 0; i < mMaxDepth; ++ i)
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[1944] | 358 | {
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| 359 | // Peel another layer
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| 360 | SwitchRenderTextures(); // switch pointer between rendertextures
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| 361 |
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| 362 | mNewBuffer->BeginCapture();
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| 363 | {
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| 364 | //if (mNewBuffer->IsDoubleBuffered())
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| 365 | // glDrawBuffer(GL_BACK);
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| 366 |
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| 367 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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| 368 |
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| 369 | cgGLBindProgram(sCgDepthPeelingProgram);
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[1949] | 370 | // cgGLBindProgram(sCgPassThroughProgram);
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[1944] | 371 | cgGLEnableProfile(sCgFragmentProfile);
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| 372 | cgGLSetTextureParameter(sTextureParam, mOldBuffer->GetDepthTextureID());
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| 373 | cgGLEnableTextureParameter(sTextureParam);
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| 374 |
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[1949] | 375 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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| 376 | glMatrixMode(GL_MODELVIEW);
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| 377 | glPushMatrix();
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| 378 | {
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| 379 | //glutSolidTorus(0.25, 1, 32, 64);
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| 380 | DrawGeometry();
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| 381 | }
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| 382 | glPopMatrix();
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| 383 |
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[1944] | 384 | cgGLDisableTextureParameter(sTextureParam);
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[1949] | 385 | cgGLDisableProfile(sCgFragmentProfile);
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[1944] | 386 | }
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| 387 | mNewBuffer->EndCapture();
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| 388 | }
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| 389 |
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[1949] | 390 | PrintGLerror("display 1");
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| 391 |
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| 392 | //mNewBuffer->Bind();
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| 393 | mNewBuffer->BindDepth();
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| 394 | mNewBuffer->EnableTextureTarget();
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| 395 |
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| 396 |
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[1944] | 397 | PrintGLerror("display 2");
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| 398 | glColor3f(1,1,1);
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| 399 | glBegin(GL_QUADS);
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[1949] | 400 | glTexCoord2f(0, 0); glVertex3f(-1000, -1000, -0.5f);
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| 401 | glTexCoord2f(1, 0); glVertex3f( 1000, -1000, -0.5f);
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| 402 | glTexCoord2f(1, 1); glVertex3f( 1000, 1000, -0.5f);
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| 403 | glTexCoord2f(0, 1); glVertex3f(-1000, 1000, -0.5f);
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[1944] | 404 | glEnd();
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| 405 |
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| 406 | if (mNewBuffer->IsFloatTexture())
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| 407 | {
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| 408 | // cgGLDisableTextureParameter(textureParam);
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| 409 | // cgGLDisableProfile(theProfile);
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| 410 | }
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| 411 | else
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| 412 | {
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| 413 | mNewBuffer->DisableTextureTarget();
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| 414 | }
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| 415 | }
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| 416 |
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| 417 |
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| 418 | }
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