clray: a218551293ad src/clray.cc

clray

view src/clray.cc @ 34:a218551293ad

blah blah blah

author	John Tsiombikas <nuclear@member.fsf.org>
date	Tue, 24 Aug 2010 18:35:03 +0100
parents	4cf4919c3812
children	980bc07be868

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 = false;

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

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

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

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

114 }

115 }

116

117 /*glGenTextures(1, &tex);

118 glBindTexture(GL_TEXTURE_2D, tex);*/

119 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);

120 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);

121 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

122 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

123 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F_ARB, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, test_pattern);

124 delete [] test_pattern;

125

126 glutMainLoop();

127 return 0;

128 }

129

130 void cleanup()

131 {

132 destroy_renderer();

133 }

134

135 static Matrix4x4 mat, inv_mat, inv_trans;

136

137 void disp()

138 {

139 glMatrixMode(GL_MODELVIEW);

140 glLoadIdentity();

141

142 if(need_update) {

143 glPushMatrix();

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

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

146 glTranslatef(0, 0, cam_dist);

147

148 glGetFloatv(GL_MODELVIEW_MATRIX, mat.m);

149

150 inv_mat = mat;

151 inv_mat.invert();

152

153 /*inv_trans = inv_mat;

154 inv_trans.transpose();*/

155 inv_trans = mat;

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

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

158 inv_trans.m[15] = 1.0;

159

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

161 glPopMatrix();

162

163 if(!dbg_glrender) {

164 if(!render()) {

165 exit(1);

166 }

167 need_update = false;

168 }

169 }

170

171 if(dbg_glrender) {

172 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

173 glLoadMatrixf(inv_mat.m);

174 dbg_render_gl(&scn, dbg_show_kdtree, dbg_show_obj);

175 } else {

176 glEnable(GL_TEXTURE_2D);

177 glDisable(GL_LIGHTING);

178

179 glBegin(GL_QUADS);

180 glColor3f(1, 1, 1);

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

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

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

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

185 glEnd();

186

187 glDisable(GL_TEXTURE_2D);

188 }

189

190 glutSwapBuffers();

191 }

192

193 void reshape(int x, int y)

194 {

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

196

197 /* reallocate the framebuffer */

198 /*delete [] fb;

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

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

201 }

202

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

204 {

205 switch(key) {

206 case 27:

207 exit(0);

208

209 case 'r':

210 need_update = true;

211 glutPostRedisplay();

212 break;

213

214 case 'd':

215 dbg_glrender = !dbg_glrender;

216 if(dbg_glrender) {

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

218 } else {

219 printf("Raytracing\n");

220 }

221 glutPostRedisplay();

222 break;

223

224 case 'k':

225 dbg_show_kdtree = !dbg_show_kdtree;

226 if(dbg_glrender) {

227 glutPostRedisplay();

228 }

229 break;

230

231 case 'o':

232 dbg_show_obj = !dbg_show_obj;

233 if(dbg_glrender) {

234 glutPostRedisplay();

235 }

236 break;

237

238 default:

239 break;

240 }

241 }

242

243 static bool bnstate[32];

244 static int prev_x, prev_y;

245

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

247 {

248 if(state == GLUT_DOWN) {

249 prev_x = x;

250 prev_y = y;

251 bnstate[bn] = true;

252 } else {

253 bnstate[bn] = false;

254 }

255 }

256

257 #define ROT_SCALE 0.5

258 #define PAN_SCALE 0.1

259

260 void motion(int x, int y)

261 {

262 int dx = x - prev_x;

263 int dy = y - prev_y;

264 prev_x = x;

265 prev_y = y;

266

267 if(bnstate[0]) {

268 cam_theta += dx * ROT_SCALE;

269 cam_phi += dy * ROT_SCALE;

270

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

272 if(cam_phi > 89) cam_phi = 89;

273

274 need_update = true;

275 glutPostRedisplay();

276 }

277 if(bnstate[2]) {

278 cam_dist += dy * PAN_SCALE;

279 if(cam_dist < 0) cam_dist = 0;

280

281 need_update = true;

282 glutPostRedisplay();

283 }

284 }

285

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

287 {

288 FILE *fp;

289

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

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

292 return false;

293 }

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

295

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

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

298

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

300 fputc(c, fp);

301 }

302 fclose(fp);

303 return true;

304 }