clray: 1bcbb53b3505 src/clray.cc

clray

view src/clray.cc @ 40:1bcbb53b3505

segfault on exit?

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 27 Aug 2010 19:00:14 +0100
parents	980bc07be868
children	057b8575a1c1

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <string.h>

4 #include <ctype.h>

5 #include <errno.h>

6 #ifndef __APPLE__

7 #include <GL/glut.h>

8 #else

9 #include <GLUT/glut.h>

10 #endif

11 #include "rt.h"

12 #include "matrix.h"

13 #include "scene.h"

14 #include "ocl.h"

16 void cleanup();

17 void disp();

18 void reshape(int x, int y);

19 void keyb(unsigned char key, int x, int y);

20 void mouse(int bn, int status, int x, int y);

21 void motion(int x, int y);

22 bool write_ppm(const char *fname, float *fb, int xsz, int ysz);

24 static int xsz, ysz;

25 static bool need_update = true;

27 static float cam_theta, cam_phi = 25.0;

28 static float cam_dist = 10.0;

30 static bool dbg_glrender = false;

31 static bool dbg_show_kdtree = false;

32 static bool dbg_show_obj = true;

34 static Scene scn;

35 static unsigned int tex;

37 int main(int argc, char **argv)

38 {

39 glutInitWindowSize(800, 600);

40 glutInit(&argc, argv);

42 int loaded = 0;

43 for(int i=1; i<argc; i++) {

44 if(argv[i][0] == '-' && argv[i][2] == 0) {

45 switch(argv[i][1]) {

46 case 'i':

47 if(!argv[++i] || !isdigit(argv[i][0])) {

48 fprintf(stderr, "-i must be followed by the intersection cost\n");

49 return 1;

50 }

52 set_accel_param(ACCEL_PARAM_COST_INTERSECT, atoi(argv[i]));

53 break;

55 case 't':

56 if(!argv[++i] || !isdigit(argv[i][0])) {

57 fprintf(stderr, "-t must be followed by the traversal cost\n");

58 return 1;

59 }

61 set_accel_param(ACCEL_PARAM_COST_TRAVERSE, atoi(argv[i]));

62 break;

64 case 'c':

65 if(!argv[++i] || !isdigit(argv[i][0])) {

66 fprintf(stderr, "-c must be followed by the max number of items per leaf node\n");

67 return 1;

68 }

70 set_accel_param(ACCEL_PARAM_MAX_NODE_ITEMS, atoi(argv[i]));

71 break;

73 default:

74 fprintf(stderr, "unrecognized option: %s\n", argv[i]);

75 return 1;

76 }

77 } else {

78 if(!scn.load(argv[i])) {

79 fprintf(stderr, "failed to load scene: %s\n", argv[i]);

80 return false;

81 }

82 loaded++;

83 }

84 }

86 if(!loaded) {

87 fprintf(stderr, "you must specify a scene file to load\n");

88 return false;

89 }

90 if(!scn.get_num_faces()) {

91 fprintf(stderr, "didn't load any polygons\n");

92 return false;

93 }

95 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

96 glutCreateWindow("OpenCL Raytracer");

98 xsz = glutGet(GLUT_WINDOW_WIDTH);

99 ysz = glutGet(GLUT_WINDOW_HEIGHT);

100

101 glutDisplayFunc(disp);

102 glutReshapeFunc(reshape);

103 glutKeyboardFunc(keyb);

104 glutMouseFunc(mouse);

105 glutMotionFunc(motion);

106

107 unsigned int *test_pattern = new unsigned int[xsz * ysz];

108 for(int i=0; i<ysz; i++) {

109 for(int j=0; j<xsz; j++) {

110 test_pattern[i * xsz + j] = ((i >> 4) & 1) == ((j >> 4) & 1) ? 0xff0000 : 0xff00;

111 }

112 }

113

114 glGenTextures(1, &tex);

115 glBindTexture(GL_TEXTURE_2D, tex);

116 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);

117 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);

118 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

119 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

120 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, test_pattern);

121 delete [] test_pattern;

122

123 if(!init_opencl()) {

124 return 1;

125 }

126

127 if(!init_renderer(xsz, ysz, &scn, tex)) {

128 return 1;

129 }

130 atexit(cleanup);

131

132 glutMainLoop();

133 return 0;

134 }

135

136 void cleanup()

137 {

138 printf("destroying renderer...\n");

139 destroy_renderer();

140

141 printf("shutting down OpenCL...\n");

142 destroy_opencl();

143

144 printf("done cleaning up\n");

145 }

146

147 static Matrix4x4 mat, inv_mat, inv_trans;

148

149 void disp()

150 {

151 glMatrixMode(GL_MODELVIEW);

152 glLoadIdentity();

153

154 if(need_update) {

155 glPushMatrix();

156 glRotatef(-cam_theta, 0, 1, 0);

157 glRotatef(-cam_phi, 1, 0, 0);

158 glTranslatef(0, 0, cam_dist);

159

160 glGetFloatv(GL_MODELVIEW_MATRIX, mat.m);

161

162 inv_mat = mat;

163 inv_mat.invert();

164

165 /*inv_trans = inv_mat;

166 inv_trans.transpose();*/

167 inv_trans = mat;

168 inv_trans.m[3] = inv_trans.m[7] = inv_trans.m[11] = 0.0;

169 inv_trans.m[12] = inv_trans.m[13] = inv_trans.m[14] = 0.0;

170 inv_trans.m[15] = 1.0;

171

172 set_xform(mat.m, inv_trans.m);

173 glPopMatrix();

174

175 if(!dbg_glrender) {

176 if(!render()) {

177 exit(1);

178 }

179 need_update = false;

180 }

181 }

182

183 if(dbg_glrender) {

184 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

185 glLoadMatrixf(inv_mat.m);

186 dbg_render_gl(&scn, dbg_show_kdtree, dbg_show_obj);

187 } else {

188 glEnable(GL_TEXTURE_2D);

189 glDisable(GL_LIGHTING);

190

191 glBegin(GL_QUADS);

192 glColor3f(1, 1, 1);

193 glTexCoord2f(0, 1); glVertex2f(-1, -1);

194 glTexCoord2f(1, 1); glVertex2f(1, -1);

195 glTexCoord2f(1, 0); glVertex2f(1, 1);

196 glTexCoord2f(0, 0); glVertex2f(-1, 1);

197 glEnd();

198

199 glDisable(GL_TEXTURE_2D);

200 }

201

202 glutSwapBuffers();

203 }

204

205 void reshape(int x, int y)

206 {

207 glViewport(0, 0, x, y);

208

209 /* reallocate the framebuffer */

210 /*delete [] fb;

211 fb = new float[x * y * 4];

212 set_framebuffer(fb, x, y);*/

213 }

214

215 void keyb(unsigned char key, int x, int y)

216 {

217 switch(key) {

218 case 27:

219 exit(0);

220

221 case 'r':

222 need_update = true;

223 glutPostRedisplay();

224 break;

225

226 case 'd':

227 dbg_glrender = !dbg_glrender;

228 if(dbg_glrender) {

229 printf("Debug OpenGL rendering\n");

230 } else {

231 printf("Raytracing\n");

232 }

233 glutPostRedisplay();

234 break;

235

236 case 'k':

237 dbg_show_kdtree = !dbg_show_kdtree;

238 if(dbg_glrender) {

239 glutPostRedisplay();

240 }

241 break;

242

243 case 'o':

244 dbg_show_obj = !dbg_show_obj;

245 if(dbg_glrender) {

246 glutPostRedisplay();

247 }

248 break;

249

250 default:

251 break;

252 }

253 }

254

255 static bool bnstate[32];

256 static int prev_x, prev_y;

257

258 void mouse(int bn, int state, int x, int y)

259 {

260 if(state == GLUT_DOWN) {

261 prev_x = x;

262 prev_y = y;

263 bnstate[bn] = true;

264 } else {

265 bnstate[bn] = false;

266 }

267 }

268

269 #define ROT_SCALE 0.5

270 #define PAN_SCALE 0.1

271

272 void motion(int x, int y)

273 {

274 int dx = x - prev_x;

275 int dy = y - prev_y;

276 prev_x = x;

277 prev_y = y;

278

279 if(bnstate[0]) {

280 cam_theta += dx * ROT_SCALE;

281 cam_phi += dy * ROT_SCALE;

282

283 if(cam_phi < -89) cam_phi = -89;

284 if(cam_phi > 89) cam_phi = 89;

285

286 need_update = true;

287 glutPostRedisplay();

288 }

289 if(bnstate[2]) {

290 cam_dist += dy * PAN_SCALE;

291 if(cam_dist < 0) cam_dist = 0;

292

293 need_update = true;

294 glutPostRedisplay();

295 }

296 }

297

298 bool write_ppm(const char *fname, float *fb, int xsz, int ysz)

299 {

300 FILE *fp;

301

302 if(!(fp = fopen(fname, "wb"))) {

303 fprintf(stderr, "write_ppm: failed to open file %s for writing: %s\n", fname, strerror(errno));

304 return false;

305 }

306 fprintf(fp, "P6\n%d %d\n255\n", xsz, ysz);

307

308 for(int i=0; i<xsz * ysz * 4; i++) {

309 if(i % 4 == 3) continue;

310

311 unsigned char c = (unsigned char)(fb[i] * 255.0);

312 fputc(c, fp);

313 }

314 fclose(fp);

315 return true;

316 }