clray

annotate src/clray.cc @ 35:7d77ded5f890

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stopped using a heap to flatten the kdtree. added explicit left/right indices
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 26 Aug 2010 20:24:07 +0100
parents 353d80127627
children a218551293ad
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@0 14
nuclear@3 15 void cleanup();
nuclear@3 16 void disp();
nuclear@3 17 void reshape(int x, int y);
nuclear@3 18 void keyb(unsigned char key, int x, int y);
nuclear@3 19 void mouse(int bn, int status, int x, int y);
nuclear@3 20 void motion(int x, int y);
nuclear@2 21 bool write_ppm(const char *fname, float *fb, int xsz, int ysz);
nuclear@2 22
nuclear@3 23 static int xsz, ysz;
nuclear@3 24 static bool need_update = true;
nuclear@3 25
nuclear@8 26 static float cam_theta, cam_phi = 25.0;
nuclear@8 27 static float cam_dist = 10.0;
nuclear@8 28
nuclear@32 29 static bool dbg_glrender = false;
nuclear@27 30 static bool dbg_show_kdtree = false;
nuclear@27 31 static bool dbg_show_obj = true;
nuclear@13 32
nuclear@13 33 static Scene scn;
nuclear@12 34
nuclear@3 35 int main(int argc, char **argv)
nuclear@0 36 {
nuclear@3 37 glutInitWindowSize(800, 600);
nuclear@3 38 glutInit(&argc, argv);
nuclear@13 39
nuclear@13 40 int loaded = 0;
nuclear@13 41 for(int i=1; i<argc; i++) {
nuclear@27 42 if(argv[i][0] == '-' && argv[i][2] == 0) {
nuclear@27 43 switch(argv[i][1]) {
nuclear@27 44 case 'i':
nuclear@27 45 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 46 fprintf(stderr, "-i must be followed by the intersection cost\n");
nuclear@27 47 return 1;
nuclear@27 48 }
nuclear@27 49
nuclear@27 50 set_accel_param(ACCEL_PARAM_COST_INTERSECT, atoi(argv[i]));
nuclear@27 51 break;
nuclear@27 52
nuclear@27 53 case 't':
nuclear@27 54 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 55 fprintf(stderr, "-t must be followed by the traversal cost\n");
nuclear@27 56 return 1;
nuclear@27 57 }
nuclear@27 58
nuclear@27 59 set_accel_param(ACCEL_PARAM_COST_TRAVERSE, atoi(argv[i]));
nuclear@27 60 break;
nuclear@27 61
nuclear@27 62 case 'c':
nuclear@27 63 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 64 fprintf(stderr, "-c must be followed by the max number of items per leaf node\n");
nuclear@27 65 return 1;
nuclear@27 66 }
nuclear@27 67
nuclear@27 68 set_accel_param(ACCEL_PARAM_MAX_NODE_ITEMS, atoi(argv[i]));
nuclear@27 69 break;
nuclear@27 70
nuclear@27 71 default:
nuclear@27 72 fprintf(stderr, "unrecognized option: %s\n", argv[i]);
nuclear@27 73 return 1;
nuclear@27 74 }
nuclear@27 75 } else {
nuclear@27 76 if(!scn.load(argv[i])) {
nuclear@27 77 fprintf(stderr, "failed to load scene: %s\n", argv[i]);
nuclear@27 78 return false;
nuclear@27 79 }
nuclear@27 80 loaded++;
nuclear@13 81 }
nuclear@13 82 }
nuclear@13 83
nuclear@13 84 if(!loaded) {
nuclear@13 85 fprintf(stderr, "you must specify a scene file to load\n");
nuclear@13 86 return false;
nuclear@13 87 }
nuclear@13 88 if(!scn.get_num_faces()) {
nuclear@13 89 fprintf(stderr, "didn't load any polygons\n");
nuclear@13 90 return false;
nuclear@13 91 }
nuclear@13 92
nuclear@18 93 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@3 94 glutCreateWindow("OpenCL Raytracer");
nuclear@0 95
nuclear@3 96 xsz = glutGet(GLUT_WINDOW_WIDTH);
nuclear@3 97 ysz = glutGet(GLUT_WINDOW_HEIGHT);
nuclear@2 98
nuclear@3 99 glutDisplayFunc(disp);
nuclear@3 100 glutReshapeFunc(reshape);
nuclear@3 101 glutKeyboardFunc(keyb);
nuclear@3 102 glutMouseFunc(mouse);
nuclear@3 103 glutMotionFunc(motion);
nuclear@0 104
nuclear@13 105 if(!init_renderer(xsz, ysz, &scn)) {
nuclear@0 106 return 1;
nuclear@0 107 }
nuclear@3 108 atexit(cleanup);
nuclear@0 109
nuclear@32 110 unsigned int *test_pattern = new unsigned int[xsz * ysz];
nuclear@32 111 for(int i=0; i<ysz; i++) {
nuclear@32 112 for(int j=0; j<xsz; j++) {
nuclear@32 113 test_pattern[i * xsz + j] = ((i >> 4) & 1) == ((j >> 4) & 1) ? 0xff0000 : 0xff00;
nuclear@32 114 }
nuclear@32 115 }
nuclear@27 116
nuclear@3 117 /*glGenTextures(1, &tex);
nuclear@3 118 glBindTexture(GL_TEXTURE_2D, tex);*/
nuclear@3 119 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
nuclear@3 120 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
nuclear@3 121 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@3 122 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@32 123 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, test_pattern);
nuclear@32 124 delete [] test_pattern;
nuclear@2 125
nuclear@3 126 glutMainLoop();
nuclear@0 127 return 0;
nuclear@0 128 }
nuclear@2 129
nuclear@3 130 void cleanup()
nuclear@2 131 {
nuclear@3 132 destroy_renderer();
nuclear@3 133 }
nuclear@2 134
nuclear@12 135 static Matrix4x4 mat, inv_mat, inv_trans;
nuclear@12 136
nuclear@3 137 void disp()
nuclear@3 138 {
nuclear@8 139 glMatrixMode(GL_MODELVIEW);
nuclear@8 140 glLoadIdentity();
nuclear@8 141
nuclear@3 142 if(need_update) {
nuclear@12 143 glPushMatrix();
nuclear@12 144 glRotatef(-cam_theta, 0, 1, 0);
nuclear@12 145 glRotatef(-cam_phi, 1, 0, 0);
nuclear@12 146 glTranslatef(0, 0, cam_dist);
nuclear@8 147
nuclear@12 148 glGetFloatv(GL_MODELVIEW_MATRIX, mat.m);
nuclear@8 149
nuclear@12 150 inv_mat = mat;
nuclear@12 151 inv_mat.invert();
nuclear@12 152
nuclear@12 153 /*inv_trans = inv_mat;
nuclear@12 154 inv_trans.transpose();*/
nuclear@12 155 inv_trans = mat;
nuclear@12 156 inv_trans.m[3] = inv_trans.m[7] = inv_trans.m[11] = 0.0;
nuclear@12 157 inv_trans.m[12] = inv_trans.m[13] = inv_trans.m[14] = 0.0;
nuclear@12 158 inv_trans.m[15] = 1.0;
nuclear@12 159
nuclear@12 160 set_xform(mat.m, inv_trans.m);
nuclear@8 161 glPopMatrix();
nuclear@8 162
nuclear@13 163 if(!dbg_glrender) {
nuclear@13 164 if(!render()) {
nuclear@13 165 exit(1);
nuclear@13 166 }
nuclear@13 167 need_update = false;
nuclear@12 168 }
nuclear@3 169 }
nuclear@2 170
nuclear@12 171 if(dbg_glrender) {
nuclear@12 172 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@12 173 glLoadMatrixf(inv_mat.m);
nuclear@27 174 dbg_render_gl(&scn, dbg_show_kdtree, dbg_show_obj);
nuclear@12 175 } else {
nuclear@12 176 glEnable(GL_TEXTURE_2D);
nuclear@22 177 glDisable(GL_LIGHTING);
nuclear@2 178
nuclear@12 179 glBegin(GL_QUADS);
nuclear@12 180 glColor3f(1, 1, 1);
nuclear@12 181 glTexCoord2f(0, 1); glVertex2f(-1, -1);
nuclear@12 182 glTexCoord2f(1, 1); glVertex2f(1, -1);
nuclear@12 183 glTexCoord2f(1, 0); glVertex2f(1, 1);
nuclear@12 184 glTexCoord2f(0, 0); glVertex2f(-1, 1);
nuclear@12 185 glEnd();
nuclear@2 186
nuclear@12 187 glDisable(GL_TEXTURE_2D);
nuclear@12 188 }
nuclear@3 189
nuclear@3 190 glutSwapBuffers();
nuclear@3 191 }
nuclear@3 192
nuclear@3 193 void reshape(int x, int y)
nuclear@3 194 {
nuclear@3 195 glViewport(0, 0, x, y);
nuclear@3 196
nuclear@3 197 /* reallocate the framebuffer */
nuclear@3 198 /*delete [] fb;
nuclear@3 199 fb = new float[x * y * 4];
nuclear@3 200 set_framebuffer(fb, x, y);*/
nuclear@3 201 }
nuclear@3 202
nuclear@3 203 void keyb(unsigned char key, int x, int y)
nuclear@3 204 {
nuclear@3 205 switch(key) {
nuclear@3 206 case 27:
nuclear@3 207 exit(0);
nuclear@3 208
nuclear@12 209 case 'r':
nuclear@12 210 need_update = true;
nuclear@12 211 glutPostRedisplay();
nuclear@3 212 break;
nuclear@3 213
nuclear@12 214 case 'd':
nuclear@12 215 dbg_glrender = !dbg_glrender;
nuclear@12 216 if(dbg_glrender) {
nuclear@21 217 printf("Debug OpenGL rendering\n");
nuclear@21 218 } else {
nuclear@21 219 printf("Raytracing\n");
nuclear@12 220 }
nuclear@3 221 glutPostRedisplay();
nuclear@3 222 break;
nuclear@3 223
nuclear@27 224 case 'k':
nuclear@27 225 dbg_show_kdtree = !dbg_show_kdtree;
nuclear@27 226 if(dbg_glrender) {
nuclear@27 227 glutPostRedisplay();
nuclear@27 228 }
nuclear@27 229 break;
nuclear@27 230
nuclear@27 231 case 'o':
nuclear@27 232 dbg_show_obj = !dbg_show_obj;
nuclear@27 233 if(dbg_glrender) {
nuclear@27 234 glutPostRedisplay();
nuclear@27 235 }
nuclear@27 236 break;
nuclear@27 237
nuclear@3 238 default:
nuclear@3 239 break;
nuclear@3 240 }
nuclear@3 241 }
nuclear@3 242
nuclear@8 243 static bool bnstate[32];
nuclear@8 244 static int prev_x, prev_y;
nuclear@8 245
nuclear@3 246 void mouse(int bn, int state, int x, int y)
nuclear@3 247 {
nuclear@8 248 if(state == GLUT_DOWN) {
nuclear@8 249 prev_x = x;
nuclear@8 250 prev_y = y;
nuclear@8 251 bnstate[bn] = true;
nuclear@8 252 } else {
nuclear@8 253 bnstate[bn] = false;
nuclear@8 254 }
nuclear@3 255 }
nuclear@3 256
nuclear@8 257 #define ROT_SCALE 0.5
nuclear@8 258 #define PAN_SCALE 0.1
nuclear@8 259
nuclear@3 260 void motion(int x, int y)
nuclear@3 261 {
nuclear@8 262 int dx = x - prev_x;
nuclear@8 263 int dy = y - prev_y;
nuclear@8 264 prev_x = x;
nuclear@8 265 prev_y = y;
nuclear@8 266
nuclear@8 267 if(bnstate[0]) {
nuclear@8 268 cam_theta += dx * ROT_SCALE;
nuclear@8 269 cam_phi += dy * ROT_SCALE;
nuclear@8 270
nuclear@12 271 if(cam_phi < -89) cam_phi = -89;
nuclear@8 272 if(cam_phi > 89) cam_phi = 89;
nuclear@8 273
nuclear@8 274 need_update = true;
nuclear@8 275 glutPostRedisplay();
nuclear@8 276 }
nuclear@8 277 if(bnstate[2]) {
nuclear@8 278 cam_dist += dy * PAN_SCALE;
nuclear@8 279 if(cam_dist < 0) cam_dist = 0;
nuclear@8 280
nuclear@8 281 need_update = true;
nuclear@8 282 glutPostRedisplay();
nuclear@8 283 }
nuclear@2 284 }
nuclear@2 285
nuclear@2 286 bool write_ppm(const char *fname, float *fb, int xsz, int ysz)
nuclear@2 287 {
nuclear@2 288 FILE *fp;
nuclear@2 289
nuclear@2 290 if(!(fp = fopen(fname, "wb"))) {
nuclear@2 291 fprintf(stderr, "write_ppm: failed to open file %s for writing: %s\n", fname, strerror(errno));
nuclear@2 292 return false;
nuclear@2 293 }
nuclear@2 294 fprintf(fp, "P6\n%d %d\n255\n", xsz, ysz);
nuclear@2 295
nuclear@2 296 for(int i=0; i<xsz * ysz * 4; i++) {
nuclear@2 297 if(i % 4 == 3) continue;
nuclear@2 298
nuclear@2 299 unsigned char c = (unsigned char)(fb[i] * 255.0);
nuclear@2 300 fputc(c, fp);
nuclear@2 301 }
nuclear@2 302 fclose(fp);
nuclear@2 303 return true;
nuclear@2 304 }