clray

annotate src/rt.cc @ 15:754faf15ba36

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burp
author John Tsiombikas
date Sun, 08 Aug 2010 09:51:45 +0100
parents 29f9330cfa4b
children 9e4a28063394
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@8 2 #include <string.h>
nuclear@2 3 #include <math.h>
nuclear@0 4 #include <assert.h>
John@14 5 #include "ogl.h"
nuclear@0 6 #include "ocl.h"
nuclear@9 7 #include "mesh.h"
nuclear@0 8
nuclear@12 9 // kernel arguments
nuclear@12 10 enum {
nuclear@12 11 KARG_FRAMEBUFFER,
nuclear@12 12 KARG_RENDER_INFO,
nuclear@12 13 KARG_FACES,
nuclear@12 14 KARG_MATLIB,
nuclear@12 15 KARG_LIGHTS,
nuclear@12 16 KARG_PRIM_RAYS,
nuclear@12 17 KARG_XFORM,
John@14 18 KARG_INVTRANS_XFORM,
John@15 19 KARG_OUTFACES, /* DBG */
John@14 20
John@14 21 NUM_KERNEL_ARGS
nuclear@12 22 };
John@11 23
nuclear@2 24 struct RendInfo {
nuclear@2 25 int xsz, ysz;
nuclear@9 26 int num_faces, num_lights;
nuclear@2 27 int max_iter;
John@15 28 int dbg;
nuclear@12 29 };
nuclear@2 30
nuclear@1 31 struct Ray {
nuclear@8 32 float origin[4], dir[4];
nuclear@12 33 };
nuclear@1 34
nuclear@3 35 struct Light {
nuclear@8 36 float pos[4], color[4];
nuclear@12 37 };
nuclear@1 38
nuclear@3 39 static Ray get_primary_ray(int x, int y, int w, int h, float vfov_deg);
nuclear@13 40 static Face *create_face_buffer(Mesh **meshes, int num_meshes);
nuclear@3 41
nuclear@13 42 static Face *faces;
nuclear@3 43 static Ray *prim_rays;
nuclear@3 44 static CLProgram *prog;
nuclear@3 45 static int global_size;
nuclear@3 46
nuclear@4 47 static Light lightlist[] = {
nuclear@12 48 {{-10, 10, -20, 0}, {1, 1, 1, 1}}
nuclear@4 49 };
nuclear@4 50
nuclear@7 51
nuclear@4 52 static RendInfo rinf;
nuclear@4 53
nuclear@4 54
nuclear@13 55 bool init_renderer(int xsz, int ysz, Scene *scn)
nuclear@0 56 {
nuclear@4 57 // render info
nuclear@4 58 rinf.xsz = xsz;
nuclear@4 59 rinf.ysz = ysz;
nuclear@13 60 rinf.num_faces = scn->get_num_faces();
nuclear@4 61 rinf.num_lights = sizeof lightlist / sizeof *lightlist;
nuclear@4 62 rinf.max_iter = 6;
John@15 63 rinf.dbg = 8;
nuclear@4 64
nuclear@3 65 /* calculate primary rays */
nuclear@3 66 prim_rays = new Ray[xsz * ysz];
nuclear@2 67
nuclear@2 68 for(int i=0; i<ysz; i++) {
nuclear@2 69 for(int j=0; j<xsz; j++) {
nuclear@2 70 prim_rays[i * xsz + j] = get_primary_ray(j, i, xsz, ysz, 45.0);
nuclear@2 71 }
nuclear@0 72 }
nuclear@0 73
nuclear@2 74 /* setup opencl */
nuclear@3 75 prog = new CLProgram("render");
nuclear@3 76 if(!prog->load("rt.cl")) {
nuclear@8 77 return false;
nuclear@0 78 }
nuclear@0 79
nuclear@13 80 /*Face **/faces = create_face_buffer(&scn->meshes[0], scn->meshes.size());
nuclear@13 81 if(!faces) {
nuclear@13 82 fprintf(stderr, "failed to create face buffer\n");
nuclear@13 83 return false;
nuclear@13 84 }
nuclear@13 85
nuclear@3 86 /* setup argument buffers */
nuclear@12 87 prog->set_arg_buffer(KARG_FRAMEBUFFER, ARG_WR, xsz * ysz * 4 * sizeof(float));
nuclear@12 88 prog->set_arg_buffer(KARG_RENDER_INFO, ARG_RD, sizeof rinf, &rinf);
John@14 89 prog->set_arg_buffer(KARG_FACES, ARG_RD, rinf.num_faces * sizeof(Face), faces);
John@14 90 prog->set_arg_buffer(KARG_MATLIB, ARG_RD, scn->get_num_materials() * sizeof(Material), scn->get_materials());
nuclear@12 91 prog->set_arg_buffer(KARG_LIGHTS, ARG_RD, sizeof lightlist, lightlist);
nuclear@12 92 prog->set_arg_buffer(KARG_PRIM_RAYS, ARG_RD, xsz * ysz * sizeof *prim_rays, prim_rays);
nuclear@12 93 prog->set_arg_buffer(KARG_XFORM, ARG_RD, 16 * sizeof(float));
nuclear@12 94 prog->set_arg_buffer(KARG_INVTRANS_XFORM, ARG_RD, 16 * sizeof(float));
John@15 95 prog->set_arg_buffer(KARG_OUTFACES, ARG_WR, rinf.num_faces * sizeof(Face));
nuclear@12 96
John@14 97 if(prog->get_num_args() < NUM_KERNEL_ARGS) {
John@14 98 return false;
John@14 99 }
John@14 100
nuclear@12 101 delete [] prim_rays;
nuclear@2 102
nuclear@3 103 global_size = xsz * ysz;
nuclear@3 104 return true;
nuclear@3 105 }
nuclear@3 106
nuclear@3 107 void destroy_renderer()
nuclear@3 108 {
nuclear@3 109 delete prog;
nuclear@3 110 }
nuclear@3 111
nuclear@3 112 bool render()
nuclear@3 113 {
nuclear@13 114 printf("Running kernel...");
nuclear@13 115 fflush(stdout);
nuclear@3 116 if(!prog->run(1, global_size)) {
nuclear@3 117 return false;
nuclear@0 118 }
nuclear@13 119 printf("done\n");
nuclear@0 120
John@15 121 /* DEBUG */
John@15 122 CLMemBuffer *dbgbuf = prog->get_arg_buffer(KARG_OUTFACES);
John@15 123 Face *outfaces = (Face*)map_mem_buffer(dbgbuf, MAP_RD);
John@15 124 for(int i=0; i<rinf.num_faces; i++) {
John@15 125 if(!(faces[i] == outfaces[i])) {
John@15 126 fprintf(stderr, "SKATA %d\n", i);
John@15 127 return false;
John@15 128 }
John@15 129 faces[i] = outfaces[i];
John@15 130 }
John@15 131 printf("equality test passed\n");
John@15 132 unmap_mem_buffer(dbgbuf);
John@15 133
John@15 134
nuclear@13 135 CLMemBuffer *mbuf = prog->get_arg_buffer(KARG_FRAMEBUFFER);
nuclear@12 136 void *fb = map_mem_buffer(mbuf, MAP_RD);
nuclear@13 137 if(!fb) {
nuclear@13 138 fprintf(stderr, "FAILED\n");
nuclear@13 139 return false;
nuclear@13 140 }
nuclear@13 141
nuclear@12 142 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, rinf.xsz, rinf.ysz, GL_RGBA, GL_FLOAT, fb);
nuclear@2 143 unmap_mem_buffer(mbuf);
nuclear@3 144 return true;
nuclear@0 145 }
nuclear@2 146
John@15 147 void dbg_set_dbg(int dbg)
John@15 148 {
John@15 149 printf("setting dbg: %d\n", dbg);
John@15 150
John@15 151 CLMemBuffer *mbuf = prog->get_arg_buffer(KARG_RENDER_INFO);
John@15 152 RendInfo *rinf = (RendInfo*)map_mem_buffer(mbuf, MAP_WR);
John@15 153 rinf->dbg = dbg;
John@15 154 unmap_mem_buffer(mbuf);
John@15 155 }
John@15 156
nuclear@13 157 void dbg_render_gl(Scene *scn)
nuclear@8 158 {
John@15 159 float lpos[] = {-1, 1, 10, 0};
nuclear@12 160 glPushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT);
nuclear@8 161
nuclear@12 162 glDisable(GL_TEXTURE_2D);
nuclear@12 163 glEnable(GL_DEPTH_TEST);
John@15 164 glEnable(GL_LIGHTING);
John@15 165 glEnable(GL_LIGHT0);
John@15 166 glLightfv(GL_LIGHT0, GL_POSITION, lpos);
John@15 167 glEnable(GL_COLOR_MATERIAL);
nuclear@12 168
nuclear@12 169 glMatrixMode(GL_PROJECTION);
nuclear@12 170 glPushMatrix();
nuclear@12 171 glLoadIdentity();
nuclear@12 172 gluPerspective(45.0, (float)rinf.xsz / (float)rinf.ysz, 0.5, 1000.0);
nuclear@12 173
John@14 174 Material *materials = scn->get_materials();
John@14 175
nuclear@12 176 glBegin(GL_TRIANGLES);
nuclear@13 177 int num_faces = scn->get_num_faces();
nuclear@13 178 for(int i=0; i<num_faces; i++) {
John@14 179 Material *mat = materials ? materials + faces[i].matid : 0;
John@14 180
John@14 181 if(mat) {
John@14 182 glColor3f(mat->kd[0], mat->kd[1], mat->kd[2]);
John@14 183 } else {
John@14 184 glColor3f(1, 1, 1);
John@14 185 }
nuclear@12 186
nuclear@12 187 for(int j=0; j<3; j++) {
nuclear@12 188 float *pos = faces[i].v[j].pos;
John@15 189 float *norm = faces[i].normal;
John@15 190 glNormal3fv(norm);
John@15 191 glVertex3fv(pos);
nuclear@12 192 }
nuclear@12 193 }
nuclear@13 194
nuclear@13 195 /*for(size_t i=0; i<scn->meshes.size(); i++) {
nuclear@13 196 Material *mat = &scn->matlib[scn->meshes[i]->matid];
nuclear@13 197
nuclear@13 198 glColor3f(mat->kd[0], mat->kd[1], mat->kd[2]);
nuclear@13 199 for(size_t j=0; j<scn->meshes[i]->faces.size(); j++) {
nuclear@13 200 for(int k=0; k<3; k++) {
nuclear@13 201 float *pos = scn->meshes[i]->faces[j].v[k].pos;
nuclear@13 202 glVertex3f(pos[0], pos[1], pos[2]);
nuclear@13 203 }
nuclear@13 204 }
nuclear@13 205 }*/
nuclear@12 206 glEnd();
nuclear@12 207
nuclear@12 208 glPopMatrix();
nuclear@12 209 glPopAttrib();
nuclear@12 210 }
nuclear@12 211
nuclear@12 212 void set_xform(float *matrix, float *invtrans)
nuclear@12 213 {
nuclear@12 214 CLMemBuffer *mbuf_xform = prog->get_arg_buffer(KARG_XFORM);
nuclear@12 215 CLMemBuffer *mbuf_invtrans = prog->get_arg_buffer(KARG_INVTRANS_XFORM);
nuclear@12 216 assert(mbuf_xform && mbuf_invtrans);
nuclear@12 217
nuclear@12 218 float *mem = (float*)map_mem_buffer(mbuf_xform, MAP_WR);
nuclear@12 219 memcpy(mem, matrix, 16 * sizeof *mem);
nuclear@13 220 /*printf("-- xform:\n");
nuclear@12 221 for(int i=0; i<16; i++) {
nuclear@12 222 printf("%2.3f\t", mem[i]);
nuclear@12 223 if(i % 4 == 3) putchar('\n');
nuclear@13 224 }*/
nuclear@12 225 unmap_mem_buffer(mbuf_xform);
nuclear@12 226
nuclear@12 227 mem = (float*)map_mem_buffer(mbuf_invtrans, MAP_WR);
nuclear@12 228 memcpy(mem, invtrans, 16 * sizeof *mem);
nuclear@13 229 /*printf("-- inverse-transpose:\n");
nuclear@12 230 for(int i=0; i<16; i++) {
nuclear@12 231 printf("%2.3f\t", mem[i]);
nuclear@12 232 if(i % 4 == 3) putchar('\n');
nuclear@13 233 }*/
nuclear@12 234 unmap_mem_buffer(mbuf_invtrans);
nuclear@8 235 }
nuclear@8 236
nuclear@3 237 static Ray get_primary_ray(int x, int y, int w, int h, float vfov_deg)
nuclear@2 238 {
nuclear@2 239 float vfov = M_PI * vfov_deg / 180.0;
nuclear@2 240 float aspect = (float)w / (float)h;
nuclear@2 241
nuclear@2 242 float ysz = 2.0;
nuclear@2 243 float xsz = aspect * ysz;
nuclear@2 244
nuclear@2 245 float px = ((float)x / (float)w) * xsz - xsz / 2.0;
nuclear@2 246 float py = 1.0 - ((float)y / (float)h) * ysz;
nuclear@2 247 float pz = 1.0 / tan(0.5 * vfov);
nuclear@2 248
nuclear@4 249 px *= 100.0;
nuclear@4 250 py *= 100.0;
nuclear@4 251 pz *= 100.0;
nuclear@2 252
nuclear@12 253 Ray ray = {{0, 0, 0, 1}, {px, py, -pz, 1}};
nuclear@2 254 return ray;
nuclear@2 255 }
nuclear@13 256
nuclear@13 257 static Face *create_face_buffer(Mesh **meshes, int num_meshes)
nuclear@13 258 {
nuclear@13 259 int num_faces = 0;
nuclear@13 260 for(int i=0; i<num_meshes; i++) {
nuclear@13 261 num_faces += meshes[i]->faces.size();
nuclear@13 262 }
nuclear@13 263 printf("constructing face buffer with %d faces (out of %d meshes)\n", num_faces, num_meshes);
nuclear@13 264
nuclear@13 265 Face *faces = new Face[num_faces];
nuclear@13 266 memset(faces, 0, num_faces * sizeof *faces);
nuclear@13 267 Face *fptr = faces;
nuclear@13 268
nuclear@13 269 for(int i=0; i<num_meshes; i++) {
nuclear@13 270 for(size_t j=0; j<meshes[i]->faces.size(); j++) {
nuclear@13 271 *fptr++ = meshes[i]->faces[j];
nuclear@13 272 }
nuclear@13 273 }
nuclear@13 274 return faces;
nuclear@13 275 }