clray

annotate src/clray.cc @ 43:f9eec11e5acc

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shoehorned the kdtree into an opnecl image and improved performance slightly
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 28 Aug 2010 09:38:49 +0100
parents 057b8575a1c1
children b5eb404af481
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@3 2 #include <stdlib.h>
nuclear@2 3 #include <string.h>
nuclear@27 4 #include <ctype.h>
nuclear@2 5 #include <errno.h>
nuclear@3 6 #ifndef __APPLE__
nuclear@3 7 #include <GL/glut.h>
nuclear@3 8 #else
nuclear@3 9 #include <GLUT/glut.h>
nuclear@3 10 #endif
nuclear@3 11 #include "rt.h"
nuclear@12 12 #include "matrix.h"
nuclear@22 13 #include "scene.h"
nuclear@39 14 #include "ocl.h"
nuclear@0 15
nuclear@3 16 void cleanup();
nuclear@3 17 void disp();
nuclear@3 18 void reshape(int x, int y);
nuclear@3 19 void keyb(unsigned char key, int x, int y);
nuclear@3 20 void mouse(int bn, int status, int x, int y);
nuclear@3 21 void motion(int x, int y);
nuclear@2 22 bool write_ppm(const char *fname, float *fb, int xsz, int ysz);
nuclear@2 23
nuclear@3 24 static int xsz, ysz;
nuclear@3 25 static bool need_update = true;
nuclear@3 26
nuclear@8 27 static float cam_theta, cam_phi = 25.0;
nuclear@8 28 static float cam_dist = 10.0;
nuclear@8 29
nuclear@32 30 static bool dbg_glrender = false;
nuclear@27 31 static bool dbg_show_kdtree = false;
nuclear@27 32 static bool dbg_show_obj = true;
nuclear@13 33
nuclear@13 34 static Scene scn;
nuclear@39 35 static unsigned int tex;
nuclear@12 36
nuclear@43 37
nuclear@3 38 int main(int argc, char **argv)
nuclear@0 39 {
nuclear@3 40 glutInitWindowSize(800, 600);
nuclear@3 41 glutInit(&argc, argv);
nuclear@13 42
nuclear@13 43 int loaded = 0;
nuclear@13 44 for(int i=1; i<argc; i++) {
nuclear@27 45 if(argv[i][0] == '-' && argv[i][2] == 0) {
nuclear@27 46 switch(argv[i][1]) {
nuclear@27 47 case 'i':
nuclear@27 48 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 49 fprintf(stderr, "-i must be followed by the intersection cost\n");
nuclear@27 50 return 1;
nuclear@27 51 }
nuclear@27 52
nuclear@27 53 set_accel_param(ACCEL_PARAM_COST_INTERSECT, atoi(argv[i]));
nuclear@27 54 break;
nuclear@27 55
nuclear@27 56 case 't':
nuclear@27 57 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 58 fprintf(stderr, "-t must be followed by the traversal cost\n");
nuclear@27 59 return 1;
nuclear@27 60 }
nuclear@27 61
nuclear@27 62 set_accel_param(ACCEL_PARAM_COST_TRAVERSE, atoi(argv[i]));
nuclear@27 63 break;
nuclear@27 64
nuclear@27 65 case 'c':
nuclear@27 66 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 67 fprintf(stderr, "-c must be followed by the max number of items per leaf node\n");
nuclear@27 68 return 1;
nuclear@27 69 }
nuclear@27 70
nuclear@27 71 set_accel_param(ACCEL_PARAM_MAX_NODE_ITEMS, atoi(argv[i]));
nuclear@27 72 break;
nuclear@27 73
nuclear@27 74 default:
nuclear@27 75 fprintf(stderr, "unrecognized option: %s\n", argv[i]);
nuclear@27 76 return 1;
nuclear@27 77 }
nuclear@27 78 } else {
nuclear@27 79 if(!scn.load(argv[i])) {
nuclear@27 80 fprintf(stderr, "failed to load scene: %s\n", argv[i]);
nuclear@27 81 return false;
nuclear@27 82 }
nuclear@27 83 loaded++;
nuclear@13 84 }
nuclear@13 85 }
nuclear@13 86
nuclear@13 87 if(!loaded) {
nuclear@13 88 fprintf(stderr, "you must specify a scene file to load\n");
nuclear@13 89 return false;
nuclear@13 90 }
nuclear@13 91 if(!scn.get_num_faces()) {
nuclear@13 92 fprintf(stderr, "didn't load any polygons\n");
nuclear@13 93 return false;
nuclear@13 94 }
nuclear@13 95
nuclear@18 96 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@3 97 glutCreateWindow("OpenCL Raytracer");
nuclear@0 98
nuclear@3 99 xsz = glutGet(GLUT_WINDOW_WIDTH);
nuclear@3 100 ysz = glutGet(GLUT_WINDOW_HEIGHT);
nuclear@2 101
nuclear@3 102 glutDisplayFunc(disp);
nuclear@3 103 glutReshapeFunc(reshape);
nuclear@3 104 glutKeyboardFunc(keyb);
nuclear@3 105 glutMouseFunc(mouse);
nuclear@3 106 glutMotionFunc(motion);
nuclear@0 107
nuclear@32 108 unsigned int *test_pattern = new unsigned int[xsz * ysz];
nuclear@32 109 for(int i=0; i<ysz; i++) {
nuclear@32 110 for(int j=0; j<xsz; j++) {
nuclear@32 111 test_pattern[i * xsz + j] = ((i >> 4) & 1) == ((j >> 4) & 1) ? 0xff0000 : 0xff00;
nuclear@32 112 }
nuclear@32 113 }
nuclear@27 114
nuclear@39 115 glGenTextures(1, &tex);
nuclear@39 116 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@3 117 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
nuclear@3 118 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
nuclear@3 119 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@3 120 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@39 121 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, test_pattern);
nuclear@32 122 delete [] test_pattern;
nuclear@2 123
nuclear@39 124 if(!init_opencl()) {
nuclear@39 125 return 1;
nuclear@39 126 }
nuclear@39 127
nuclear@39 128 if(!init_renderer(xsz, ysz, &scn, tex)) {
nuclear@39 129 return 1;
nuclear@39 130 }
nuclear@39 131 atexit(cleanup);
nuclear@39 132
nuclear@3 133 glutMainLoop();
nuclear@0 134 return 0;
nuclear@0 135 }
nuclear@2 136
nuclear@3 137 void cleanup()
nuclear@2 138 {
nuclear@41 139 printf("destroying renderer ...\n");
nuclear@3 140 destroy_renderer();
nuclear@40 141
nuclear@41 142 printf("shutting down OpenCL ...\n");
nuclear@40 143 destroy_opencl();
nuclear@40 144
nuclear@41 145 printf("cleaning up OpenGL resources ...\n");
nuclear@41 146 glDeleteTextures(1, &tex);
nuclear@3 147 }
nuclear@2 148
nuclear@12 149 static Matrix4x4 mat, inv_mat, inv_trans;
nuclear@12 150
nuclear@3 151 void disp()
nuclear@3 152 {
nuclear@8 153 glMatrixMode(GL_MODELVIEW);
nuclear@8 154 glLoadIdentity();
nuclear@8 155
nuclear@3 156 if(need_update) {
nuclear@12 157 glPushMatrix();
nuclear@12 158 glRotatef(-cam_theta, 0, 1, 0);
nuclear@12 159 glRotatef(-cam_phi, 1, 0, 0);
nuclear@12 160 glTranslatef(0, 0, cam_dist);
nuclear@8 161
nuclear@12 162 glGetFloatv(GL_MODELVIEW_MATRIX, mat.m);
nuclear@8 163
nuclear@12 164 inv_mat = mat;
nuclear@12 165 inv_mat.invert();
nuclear@12 166
nuclear@12 167 /*inv_trans = inv_mat;
nuclear@12 168 inv_trans.transpose();*/
nuclear@12 169 inv_trans = mat;
nuclear@12 170 inv_trans.m[3] = inv_trans.m[7] = inv_trans.m[11] = 0.0;
nuclear@12 171 inv_trans.m[12] = inv_trans.m[13] = inv_trans.m[14] = 0.0;
nuclear@12 172 inv_trans.m[15] = 1.0;
nuclear@12 173
nuclear@12 174 set_xform(mat.m, inv_trans.m);
nuclear@8 175 glPopMatrix();
nuclear@8 176
nuclear@13 177 if(!dbg_glrender) {
nuclear@13 178 if(!render()) {
nuclear@13 179 exit(1);
nuclear@13 180 }
nuclear@13 181 need_update = false;
nuclear@12 182 }
nuclear@3 183 }
nuclear@2 184
nuclear@12 185 if(dbg_glrender) {
nuclear@12 186 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@12 187 glLoadMatrixf(inv_mat.m);
nuclear@27 188 dbg_render_gl(&scn, dbg_show_kdtree, dbg_show_obj);
nuclear@12 189 } else {
nuclear@12 190 glEnable(GL_TEXTURE_2D);
nuclear@22 191 glDisable(GL_LIGHTING);
nuclear@2 192
nuclear@12 193 glBegin(GL_QUADS);
nuclear@12 194 glColor3f(1, 1, 1);
nuclear@12 195 glTexCoord2f(0, 1); glVertex2f(-1, -1);
nuclear@12 196 glTexCoord2f(1, 1); glVertex2f(1, -1);
nuclear@12 197 glTexCoord2f(1, 0); glVertex2f(1, 1);
nuclear@12 198 glTexCoord2f(0, 0); glVertex2f(-1, 1);
nuclear@12 199 glEnd();
nuclear@2 200
nuclear@12 201 glDisable(GL_TEXTURE_2D);
nuclear@12 202 }
nuclear@3 203
nuclear@3 204 glutSwapBuffers();
nuclear@3 205 }
nuclear@3 206
nuclear@3 207 void reshape(int x, int y)
nuclear@3 208 {
nuclear@3 209 glViewport(0, 0, x, y);
nuclear@3 210
nuclear@3 211 /* reallocate the framebuffer */
nuclear@3 212 /*delete [] fb;
nuclear@3 213 fb = new float[x * y * 4];
nuclear@3 214 set_framebuffer(fb, x, y);*/
nuclear@3 215 }
nuclear@3 216
nuclear@3 217 void keyb(unsigned char key, int x, int y)
nuclear@3 218 {
nuclear@3 219 switch(key) {
nuclear@3 220 case 27:
nuclear@3 221 exit(0);
nuclear@3 222
nuclear@12 223 case 'r':
nuclear@12 224 need_update = true;
nuclear@12 225 glutPostRedisplay();
nuclear@3 226 break;
nuclear@3 227
nuclear@12 228 case 'd':
nuclear@12 229 dbg_glrender = !dbg_glrender;
nuclear@12 230 if(dbg_glrender) {
nuclear@21 231 printf("Debug OpenGL rendering\n");
nuclear@21 232 } else {
nuclear@21 233 printf("Raytracing\n");
nuclear@12 234 }
nuclear@3 235 glutPostRedisplay();
nuclear@3 236 break;
nuclear@3 237
nuclear@27 238 case 'k':
nuclear@27 239 dbg_show_kdtree = !dbg_show_kdtree;
nuclear@27 240 if(dbg_glrender) {
nuclear@27 241 glutPostRedisplay();
nuclear@27 242 }
nuclear@27 243 break;
nuclear@27 244
nuclear@27 245 case 'o':
nuclear@27 246 dbg_show_obj = !dbg_show_obj;
nuclear@27 247 if(dbg_glrender) {
nuclear@27 248 glutPostRedisplay();
nuclear@27 249 }
nuclear@27 250 break;
nuclear@27 251
nuclear@3 252 default:
nuclear@3 253 break;
nuclear@3 254 }
nuclear@3 255 }
nuclear@3 256
nuclear@8 257 static bool bnstate[32];
nuclear@8 258 static int prev_x, prev_y;
nuclear@8 259
nuclear@3 260 void mouse(int bn, int state, int x, int y)
nuclear@3 261 {
nuclear@8 262 if(state == GLUT_DOWN) {
nuclear@8 263 prev_x = x;
nuclear@8 264 prev_y = y;
nuclear@8 265 bnstate[bn] = true;
nuclear@8 266 } else {
nuclear@8 267 bnstate[bn] = false;
nuclear@8 268 }
nuclear@3 269 }
nuclear@3 270
nuclear@8 271 #define ROT_SCALE 0.5
nuclear@8 272 #define PAN_SCALE 0.1
nuclear@8 273
nuclear@3 274 void motion(int x, int y)
nuclear@3 275 {
nuclear@8 276 int dx = x - prev_x;
nuclear@8 277 int dy = y - prev_y;
nuclear@8 278 prev_x = x;
nuclear@8 279 prev_y = y;
nuclear@8 280
nuclear@8 281 if(bnstate[0]) {
nuclear@8 282 cam_theta += dx * ROT_SCALE;
nuclear@8 283 cam_phi += dy * ROT_SCALE;
nuclear@8 284
nuclear@12 285 if(cam_phi < -89) cam_phi = -89;
nuclear@8 286 if(cam_phi > 89) cam_phi = 89;
nuclear@8 287
nuclear@8 288 need_update = true;
nuclear@8 289 glutPostRedisplay();
nuclear@8 290 }
nuclear@8 291 if(bnstate[2]) {
nuclear@8 292 cam_dist += dy * PAN_SCALE;
nuclear@8 293 if(cam_dist < 0) cam_dist = 0;
nuclear@8 294
nuclear@8 295 need_update = true;
nuclear@8 296 glutPostRedisplay();
nuclear@8 297 }
nuclear@2 298 }
nuclear@2 299
nuclear@2 300 bool write_ppm(const char *fname, float *fb, int xsz, int ysz)
nuclear@2 301 {
nuclear@2 302 FILE *fp;
nuclear@2 303
nuclear@2 304 if(!(fp = fopen(fname, "wb"))) {
nuclear@2 305 fprintf(stderr, "write_ppm: failed to open file %s for writing: %s\n", fname, strerror(errno));
nuclear@2 306 return false;
nuclear@2 307 }
nuclear@2 308 fprintf(fp, "P6\n%d %d\n255\n", xsz, ysz);
nuclear@2 309
nuclear@2 310 for(int i=0; i<xsz * ysz * 4; i++) {
nuclear@2 311 if(i % 4 == 3) continue;
nuclear@2 312
nuclear@2 313 unsigned char c = (unsigned char)(fb[i] * 255.0);
nuclear@2 314 fputc(c, fp);
nuclear@2 315 }
nuclear@2 316 fclose(fp);
nuclear@2 317 return true;
nuclear@2 318 }