clray: 980bc07be868 src/clray.cc

clray

view src/clray.cc @ 39:980bc07be868

Implemented OpenGL/OpenCL interop, and removed the texture copy

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 27 Aug 2010 18:30:09 +0100
parents	a218551293ad
children	1bcbb53b3505

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 destroy_renderer();

139 }

140

141 static Matrix4x4 mat, inv_mat, inv_trans;

142

143 void disp()

144 {

145 glMatrixMode(GL_MODELVIEW);

146 glLoadIdentity();

147

148 if(need_update) {

149 glPushMatrix();

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

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

152 glTranslatef(0, 0, cam_dist);

153

154 glGetFloatv(GL_MODELVIEW_MATRIX, mat.m);

155

156 inv_mat = mat;

157 inv_mat.invert();

158

159 /*inv_trans = inv_mat;

160 inv_trans.transpose();*/

161 inv_trans = mat;

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

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

164 inv_trans.m[15] = 1.0;

165

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

167 glPopMatrix();

168

169 if(!dbg_glrender) {

170 if(!render()) {

171 exit(1);

172 }

173 need_update = false;

174 }

175 }

176

177 if(dbg_glrender) {

178 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

179 glLoadMatrixf(inv_mat.m);

180 dbg_render_gl(&scn, dbg_show_kdtree, dbg_show_obj);

181 } else {

182 glEnable(GL_TEXTURE_2D);

183 glDisable(GL_LIGHTING);

184

185 glBegin(GL_QUADS);

186 glColor3f(1, 1, 1);

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

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

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

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

191 glEnd();

192

193 glDisable(GL_TEXTURE_2D);

194 }

195

196 glutSwapBuffers();

197 }

198

199 void reshape(int x, int y)

200 {

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

202

203 /* reallocate the framebuffer */

204 /*delete [] fb;

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

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

207 }

208

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

210 {

211 switch(key) {

212 case 27:

213 exit(0);

214

215 case 'r':

216 need_update = true;

217 glutPostRedisplay();

218 break;

219

220 case 'd':

221 dbg_glrender = !dbg_glrender;

222 if(dbg_glrender) {

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

224 } else {

225 printf("Raytracing\n");

226 }

227 glutPostRedisplay();

228 break;

229

230 case 'k':

231 dbg_show_kdtree = !dbg_show_kdtree;

232 if(dbg_glrender) {

233 glutPostRedisplay();

234 }

235 break;

236

237 case 'o':

238 dbg_show_obj = !dbg_show_obj;

239 if(dbg_glrender) {

240 glutPostRedisplay();

241 }

242 break;

243

244 default:

245 break;

246 }

247 }

248

249 static bool bnstate[32];

250 static int prev_x, prev_y;

251

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

253 {

254 if(state == GLUT_DOWN) {

255 prev_x = x;

256 prev_y = y;

257 bnstate[bn] = true;

258 } else {

259 bnstate[bn] = false;

260 }

261 }

262

263 #define ROT_SCALE 0.5

264 #define PAN_SCALE 0.1

265

266 void motion(int x, int y)

267 {

268 int dx = x - prev_x;

269 int dy = y - prev_y;

270 prev_x = x;

271 prev_y = y;

272

273 if(bnstate[0]) {

274 cam_theta += dx * ROT_SCALE;

275 cam_phi += dy * ROT_SCALE;

276

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

278 if(cam_phi > 89) cam_phi = 89;

279

280 need_update = true;

281 glutPostRedisplay();

282 }

283 if(bnstate[2]) {

284 cam_dist += dy * PAN_SCALE;

285 if(cam_dist < 0) cam_dist = 0;

286

287 need_update = true;

288 glutPostRedisplay();

289 }

290 }

291

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

293 {

294 FILE *fp;

295

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

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

298 return false;

299 }

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

301

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

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

304

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

306 fputc(c, fp);

307 }

308 fclose(fp);

309 return true;

310 }