clray: 04803c702014 src/clray.cc

clray

view src/clray.cc @ 30:04803c702014

debugging ...

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sat, 21 Aug 2010 23:57:19 +0100
parents	8b2f2ad14ae7
children	4cf4919c3812

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"

15 void cleanup();

16 void disp();

17 void reshape(int x, int y);

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

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

20 void motion(int x, int y);

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

23 static int xsz, ysz;

24 static bool need_update = true;

26 static float cam_theta, cam_phi = 25.0;

27 static float cam_dist = 10.0;

29 static bool dbg_glrender = true;

30 static bool dbg_show_kdtree = false;

31 static bool dbg_show_obj = true;

33 static Scene scn;

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

36 {

37 glutInitWindowSize(800, 600);

38 glutInit(&argc, argv);

40 int loaded = 0;

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

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

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

44 case 'i':

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

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

47 return 1;

48 }

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

51 break;

53 case 't':

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

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

56 return 1;

57 }

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

60 break;

62 case 'c':

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

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

65 return 1;

66 }

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

69 break;

71 default:

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

73 return 1;

74 }

75 } else {

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

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

78 return false;

79 }

80 loaded++;

81 }

82 }

84 if(!loaded) {

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

86 return false;

87 }

88 if(!scn.get_num_faces()) {

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

90 return false;

91 }

93 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

94 glutCreateWindow("OpenCL Raytracer");

96 xsz = glutGet(GLUT_WINDOW_WIDTH);

97 ysz = glutGet(GLUT_WINDOW_HEIGHT);

99 glutDisplayFunc(disp);

100 glutReshapeFunc(reshape);

101 glutKeyboardFunc(keyb);

102 glutMouseFunc(mouse);

103 glutMotionFunc(motion);

104

105 if(!init_renderer(xsz, ysz, &scn)) {

106 return 1;

107 }

108 atexit(cleanup);

109

110

111 /*glGenTextures(1, &tex);

112 glBindTexture(GL_TEXTURE_2D, tex);*/

113 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);

114 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);

115 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

116 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

117 glTexImage2D(GL_TEXTURE_2D, 0, 4, xsz, ysz, 0, GL_RGBA, GL_FLOAT, 0);

118

119 glutMainLoop();

120 return 0;

121 }

122

123 void cleanup()

124 {

125 destroy_renderer();

126 }

127

128 static Matrix4x4 mat, inv_mat, inv_trans;

129

130 void disp()

131 {

132 glMatrixMode(GL_MODELVIEW);

133 glLoadIdentity();

134

135 if(need_update) {

136 glPushMatrix();

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

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

139 glTranslatef(0, 0, cam_dist);

140

141 glGetFloatv(GL_MODELVIEW_MATRIX, mat.m);

142

143 inv_mat = mat;

144 inv_mat.invert();

145

146 /*inv_trans = inv_mat;

147 inv_trans.transpose();*/

148 inv_trans = mat;

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

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

151 inv_trans.m[15] = 1.0;

152

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

154 glPopMatrix();

155

156 if(!dbg_glrender) {

157 if(!render()) {

158 exit(1);

159 }

160 need_update = false;

161 }

162 }

163

164 if(dbg_glrender) {

165 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

166 glLoadMatrixf(inv_mat.m);

167 dbg_render_gl(&scn, dbg_show_kdtree, dbg_show_obj);

168 } else {

169 glEnable(GL_TEXTURE_2D);

170 glDisable(GL_LIGHTING);

171

172 glBegin(GL_QUADS);

173 glColor3f(1, 1, 1);

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

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

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

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

178 glEnd();

179

180 glDisable(GL_TEXTURE_2D);

181 }

182

183 glutSwapBuffers();

184 }

185

186 void reshape(int x, int y)

187 {

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

189

190 /* reallocate the framebuffer */

191 /*delete [] fb;

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

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

194 }

195

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

197 {

198 switch(key) {

199 case 27:

200 exit(0);

201

202 case 'r':

203 need_update = true;

204 glutPostRedisplay();

205 break;

206

207 case 'd':

208 dbg_glrender = !dbg_glrender;

209 if(dbg_glrender) {

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

211 } else {

212 printf("Raytracing\n");

213 }

214 glutPostRedisplay();

215 break;

216

217 case 'k':

218 dbg_show_kdtree = !dbg_show_kdtree;

219 if(dbg_glrender) {

220 glutPostRedisplay();

221 }

222 break;

223

224 case 'o':

225 dbg_show_obj = !dbg_show_obj;

226 if(dbg_glrender) {

227 glutPostRedisplay();

228 }

229 break;

230

231 default:

232 break;

233 }

234 }

235

236 static bool bnstate[32];

237 static int prev_x, prev_y;

238

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

240 {

241 if(state == GLUT_DOWN) {

242 prev_x = x;

243 prev_y = y;

244 bnstate[bn] = true;

245 } else {

246 bnstate[bn] = false;

247 }

248 }

249

250 #define ROT_SCALE 0.5

251 #define PAN_SCALE 0.1

252

253 void motion(int x, int y)

254 {

255 int dx = x - prev_x;

256 int dy = y - prev_y;

257 prev_x = x;

258 prev_y = y;

259

260 if(bnstate[0]) {

261 cam_theta += dx * ROT_SCALE;

262 cam_phi += dy * ROT_SCALE;

263

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

265 if(cam_phi > 89) cam_phi = 89;

266

267 need_update = true;

268 glutPostRedisplay();

269 }

270 if(bnstate[2]) {

271 cam_dist += dy * PAN_SCALE;

272 if(cam_dist < 0) cam_dist = 0;

273

274 need_update = true;

275 glutPostRedisplay();

276 }

277 }

278

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

280 {

281 FILE *fp;

282

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

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

285 return false;

286 }

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

288

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

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

291

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

293 fputc(c, fp);

294 }

295 fclose(fp);

296 return true;

297 }