clray

annotate src/rt.cc @ 14:29f9330cfa4b

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trying to debug the bloody thing
author John Tsiombikas
date Sat, 07 Aug 2010 03:36:36 +0100
parents 407935b73af3
children 754faf15ba36
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@14 19
John@14 20 NUM_KERNEL_ARGS
nuclear@12 21 };
John@11 22
nuclear@2 23 struct RendInfo {
nuclear@2 24 int xsz, ysz;
nuclear@9 25 int num_faces, num_lights;
nuclear@2 26 int max_iter;
nuclear@12 27 };
nuclear@2 28
nuclear@1 29 struct Ray {
nuclear@8 30 float origin[4], dir[4];
nuclear@12 31 };
nuclear@1 32
nuclear@3 33 struct Light {
nuclear@8 34 float pos[4], color[4];
nuclear@12 35 };
nuclear@1 36
nuclear@3 37 static Ray get_primary_ray(int x, int y, int w, int h, float vfov_deg);
nuclear@13 38 static Face *create_face_buffer(Mesh **meshes, int num_meshes);
nuclear@3 39
nuclear@13 40 static Face *faces;
nuclear@3 41 static Ray *prim_rays;
nuclear@3 42 static CLProgram *prog;
nuclear@3 43 static int global_size;
nuclear@3 44
nuclear@4 45 static Light lightlist[] = {
nuclear@12 46 {{-10, 10, -20, 0}, {1, 1, 1, 1}}
nuclear@4 47 };
nuclear@4 48
nuclear@7 49
nuclear@4 50 static RendInfo rinf;
nuclear@4 51
nuclear@4 52
nuclear@13 53 bool init_renderer(int xsz, int ysz, Scene *scn)
nuclear@0 54 {
nuclear@4 55 // render info
nuclear@4 56 rinf.xsz = xsz;
nuclear@4 57 rinf.ysz = ysz;
nuclear@13 58 rinf.num_faces = scn->get_num_faces();
nuclear@4 59 rinf.num_lights = sizeof lightlist / sizeof *lightlist;
nuclear@4 60 rinf.max_iter = 6;
nuclear@4 61
nuclear@3 62 /* calculate primary rays */
nuclear@3 63 prim_rays = new Ray[xsz * ysz];
nuclear@2 64
nuclear@2 65 for(int i=0; i<ysz; i++) {
nuclear@2 66 for(int j=0; j<xsz; j++) {
nuclear@2 67 prim_rays[i * xsz + j] = get_primary_ray(j, i, xsz, ysz, 45.0);
nuclear@2 68 }
nuclear@0 69 }
nuclear@0 70
nuclear@2 71 /* setup opencl */
nuclear@3 72 prog = new CLProgram("render");
nuclear@3 73 if(!prog->load("rt.cl")) {
nuclear@8 74 return false;
nuclear@0 75 }
nuclear@0 76
nuclear@13 77 /*Face **/faces = create_face_buffer(&scn->meshes[0], scn->meshes.size());
nuclear@13 78 if(!faces) {
nuclear@13 79 fprintf(stderr, "failed to create face buffer\n");
nuclear@13 80 return false;
nuclear@13 81 }
nuclear@13 82
nuclear@3 83 /* setup argument buffers */
nuclear@12 84 prog->set_arg_buffer(KARG_FRAMEBUFFER, ARG_WR, xsz * ysz * 4 * sizeof(float));
nuclear@12 85 prog->set_arg_buffer(KARG_RENDER_INFO, ARG_RD, sizeof rinf, &rinf);
John@14 86 prog->set_arg_buffer(KARG_FACES, ARG_RD, rinf.num_faces * sizeof(Face), faces);
John@14 87 prog->set_arg_buffer(KARG_MATLIB, ARG_RD, scn->get_num_materials() * sizeof(Material), scn->get_materials());
nuclear@12 88 prog->set_arg_buffer(KARG_LIGHTS, ARG_RD, sizeof lightlist, lightlist);
nuclear@12 89 prog->set_arg_buffer(KARG_PRIM_RAYS, ARG_RD, xsz * ysz * sizeof *prim_rays, prim_rays);
nuclear@12 90 prog->set_arg_buffer(KARG_XFORM, ARG_RD, 16 * sizeof(float));
nuclear@12 91 prog->set_arg_buffer(KARG_INVTRANS_XFORM, ARG_RD, 16 * sizeof(float));
nuclear@12 92
John@14 93 if(prog->get_num_args() < NUM_KERNEL_ARGS) {
John@14 94 return false;
John@14 95 }
John@14 96
nuclear@12 97 delete [] prim_rays;
nuclear@2 98
nuclear@3 99 global_size = xsz * ysz;
nuclear@3 100 return true;
nuclear@3 101 }
nuclear@3 102
nuclear@3 103 void destroy_renderer()
nuclear@3 104 {
nuclear@3 105 delete prog;
nuclear@3 106 }
nuclear@3 107
nuclear@3 108 bool render()
nuclear@3 109 {
nuclear@13 110 printf("Running kernel...");
nuclear@13 111 fflush(stdout);
nuclear@3 112 if(!prog->run(1, global_size)) {
nuclear@3 113 return false;
nuclear@0 114 }
nuclear@13 115 printf("done\n");
nuclear@0 116
nuclear@13 117 CLMemBuffer *mbuf = prog->get_arg_buffer(KARG_FRAMEBUFFER);
nuclear@12 118 void *fb = map_mem_buffer(mbuf, MAP_RD);
nuclear@13 119 if(!fb) {
nuclear@13 120 fprintf(stderr, "FAILED\n");
nuclear@13 121 return false;
nuclear@13 122 }
nuclear@13 123
nuclear@12 124 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, rinf.xsz, rinf.ysz, GL_RGBA, GL_FLOAT, fb);
nuclear@2 125 unmap_mem_buffer(mbuf);
nuclear@3 126 return true;
nuclear@0 127 }
nuclear@2 128
nuclear@13 129 void dbg_render_gl(Scene *scn)
nuclear@8 130 {
nuclear@12 131 glPushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT);
nuclear@8 132
nuclear@12 133 glDisable(GL_TEXTURE_2D);
nuclear@12 134 glEnable(GL_DEPTH_TEST);
nuclear@12 135
nuclear@12 136 glMatrixMode(GL_PROJECTION);
nuclear@12 137 glPushMatrix();
nuclear@12 138 glLoadIdentity();
nuclear@12 139 gluPerspective(45.0, (float)rinf.xsz / (float)rinf.ysz, 0.5, 1000.0);
nuclear@12 140
John@14 141 Material *materials = scn->get_materials();
John@14 142
nuclear@12 143 glBegin(GL_TRIANGLES);
nuclear@13 144 int num_faces = scn->get_num_faces();
nuclear@13 145 for(int i=0; i<num_faces; i++) {
John@14 146 Material *mat = materials ? materials + faces[i].matid : 0;
John@14 147
John@14 148 if(mat) {
John@14 149 glColor3f(mat->kd[0], mat->kd[1], mat->kd[2]);
John@14 150 } else {
John@14 151 glColor3f(1, 1, 1);
John@14 152 }
nuclear@12 153
nuclear@12 154 for(int j=0; j<3; j++) {
nuclear@12 155 float *pos = faces[i].v[j].pos;
nuclear@12 156 glVertex3f(pos[0], pos[1], pos[2]);
nuclear@12 157 }
nuclear@12 158 }
nuclear@13 159
nuclear@13 160 /*for(size_t i=0; i<scn->meshes.size(); i++) {
nuclear@13 161 Material *mat = &scn->matlib[scn->meshes[i]->matid];
nuclear@13 162
nuclear@13 163 glColor3f(mat->kd[0], mat->kd[1], mat->kd[2]);
nuclear@13 164 for(size_t j=0; j<scn->meshes[i]->faces.size(); j++) {
nuclear@13 165 for(int k=0; k<3; k++) {
nuclear@13 166 float *pos = scn->meshes[i]->faces[j].v[k].pos;
nuclear@13 167 glVertex3f(pos[0], pos[1], pos[2]);
nuclear@13 168 }
nuclear@13 169 }
nuclear@13 170 }*/
nuclear@12 171 glEnd();
nuclear@12 172
nuclear@12 173 glPopMatrix();
nuclear@12 174 glPopAttrib();
nuclear@12 175 }
nuclear@12 176
nuclear@12 177 void set_xform(float *matrix, float *invtrans)
nuclear@12 178 {
nuclear@12 179 CLMemBuffer *mbuf_xform = prog->get_arg_buffer(KARG_XFORM);
nuclear@12 180 CLMemBuffer *mbuf_invtrans = prog->get_arg_buffer(KARG_INVTRANS_XFORM);
nuclear@12 181 assert(mbuf_xform && mbuf_invtrans);
nuclear@12 182
nuclear@12 183 float *mem = (float*)map_mem_buffer(mbuf_xform, MAP_WR);
nuclear@12 184 memcpy(mem, matrix, 16 * sizeof *mem);
nuclear@13 185 /*printf("-- xform:\n");
nuclear@12 186 for(int i=0; i<16; i++) {
nuclear@12 187 printf("%2.3f\t", mem[i]);
nuclear@12 188 if(i % 4 == 3) putchar('\n');
nuclear@13 189 }*/
nuclear@12 190 unmap_mem_buffer(mbuf_xform);
nuclear@12 191
nuclear@12 192 mem = (float*)map_mem_buffer(mbuf_invtrans, MAP_WR);
nuclear@12 193 memcpy(mem, invtrans, 16 * sizeof *mem);
nuclear@13 194 /*printf("-- inverse-transpose:\n");
nuclear@12 195 for(int i=0; i<16; i++) {
nuclear@12 196 printf("%2.3f\t", mem[i]);
nuclear@12 197 if(i % 4 == 3) putchar('\n');
nuclear@13 198 }*/
nuclear@12 199 unmap_mem_buffer(mbuf_invtrans);
nuclear@8 200 }
nuclear@8 201
nuclear@3 202 static Ray get_primary_ray(int x, int y, int w, int h, float vfov_deg)
nuclear@2 203 {
nuclear@2 204 float vfov = M_PI * vfov_deg / 180.0;
nuclear@2 205 float aspect = (float)w / (float)h;
nuclear@2 206
nuclear@2 207 float ysz = 2.0;
nuclear@2 208 float xsz = aspect * ysz;
nuclear@2 209
nuclear@2 210 float px = ((float)x / (float)w) * xsz - xsz / 2.0;
nuclear@2 211 float py = 1.0 - ((float)y / (float)h) * ysz;
nuclear@2 212 float pz = 1.0 / tan(0.5 * vfov);
nuclear@2 213
nuclear@4 214 px *= 100.0;
nuclear@4 215 py *= 100.0;
nuclear@4 216 pz *= 100.0;
nuclear@2 217
nuclear@12 218 Ray ray = {{0, 0, 0, 1}, {px, py, -pz, 1}};
nuclear@2 219 return ray;
nuclear@2 220 }
nuclear@13 221
nuclear@13 222 static Face *create_face_buffer(Mesh **meshes, int num_meshes)
nuclear@13 223 {
nuclear@13 224 int num_faces = 0;
nuclear@13 225 for(int i=0; i<num_meshes; i++) {
nuclear@13 226 num_faces += meshes[i]->faces.size();
nuclear@13 227 }
nuclear@13 228 printf("constructing face buffer with %d faces (out of %d meshes)\n", num_faces, num_meshes);
nuclear@13 229
nuclear@13 230 Face *faces = new Face[num_faces];
nuclear@13 231 memset(faces, 0, num_faces * sizeof *faces);
nuclear@13 232 Face *fptr = faces;
nuclear@13 233
nuclear@13 234 for(int i=0; i<num_meshes; i++) {
nuclear@13 235 for(size_t j=0; j<meshes[i]->faces.size(); j++) {
nuclear@13 236 *fptr++ = meshes[i]->faces[j];
nuclear@13 237 }
nuclear@13 238 }
nuclear@13 239 return faces;
nuclear@13 240 }