244 lines
8.2 KiB
Plaintext
Executable File
244 lines
8.2 KiB
Plaintext
Executable File
// ======================================================================== //
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// Copyright 2009-2014 Intel Corporation //
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// //
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// Licensed under the Apache License, Version 2.0 (the "License"); //
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// you may not use this file except in compliance with the License. //
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// You may obtain a copy of the License at //
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// //
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// http://www.apache.org/licenses/LICENSE-2.0 //
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// //
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// Unless required by applicable law or agreed to in writing, software //
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// distributed under the License is distributed on an "AS IS" BASIS, //
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. //
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// See the License for the specific language governing permissions and //
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// limitations under the License. //
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// ======================================================================== //
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#include "../common/tutorial/tutorial_device.isph"
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#include "../common/tutorial/scene_device.h"
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#define PARALLEL_COMMIT
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/* scene data */
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extern uniform ISPCScene* uniform g_ispc_scene;
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RTCScene g_scene = NULL;
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/* render function to use */
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renderPixelFunc renderPixel;
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/* error reporting function */
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void error_handler(const uniform RTCError code, const uniform int8* uniform str)
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{
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print("Embree: ");
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switch (code) {
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case RTC_UNKNOWN_ERROR : print("RTC_UNKNOWN_ERROR"); break;
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case RTC_INVALID_ARGUMENT : print("RTC_INVALID_ARGUMENT"); break;
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case RTC_INVALID_OPERATION: print("RTC_INVALID_OPERATION"); break;
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case RTC_OUT_OF_MEMORY : print("RTC_OUT_OF_MEMORY"); break;
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case RTC_UNSUPPORTED_CPU : print("RTC_UNSUPPORTED_CPU"); break;
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default : print("invalid error code"); break;
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}
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if (str) {
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print(" (");
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while (*str) putchar(*str++);
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print(")\n");
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}
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abort();
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}
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Vec3fa renderPixelEyeLight(float x, float y, const Vec3fa& vx, const Vec3fa& vy, const Vec3fa& vz, const Vec3fa& p);
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/* called by the C++ code for initialization */
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export void device_init (uniform int8* uniform cfg)
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{
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/* initialize ray tracing core */
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rtcInit(cfg);
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/* set error handler */
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rtcSetErrorFunction(error_handler);
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/* set start render mode */
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renderPixel = renderPixelStandard;
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//renderPixel = renderPixelEyeLight;
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}
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RTCScene convertScene(uniform ISPCScene* uniform scene_in)
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{
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/* create scene */
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RTCScene scene_out = rtcNewScene(RTC_SCENE_STATIC,RTC_INTERSECT_UNIFORM | RTC_INTERSECT_VARYING);
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/* add all meshes to the scene */
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for (uniform int i=0; i<scene_in->numMeshes; i++)
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{
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/* get ith mesh */
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uniform ISPCMesh* uniform mesh = scene_in->meshes[i];
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/* create a triangle mesh */
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uniform unsigned int geometry = rtcNewTriangleMesh (scene_out, RTC_GEOMETRY_STATIC, mesh->numTriangles, mesh->numVertices);
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/* share vertex buffer */
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rtcSetBuffer(scene_out, geometry, RTC_VERTEX_BUFFER, mesh->positions, 0, sizeof(uniform Vec3fa ));
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rtcSetBuffer(scene_out, geometry, RTC_INDEX_BUFFER, mesh->triangles, 0, sizeof(uniform ISPCTriangle));
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}
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/* commit changes to scene */
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return scene_out;
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}
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/* task that renders a single screen tile */
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Vec3f renderPixelStandard(float x, float y, const uniform Vec3f& vx, const uniform Vec3f& vy, const uniform Vec3f& vz, const uniform Vec3f& p)
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{
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/* initialize ray */
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RTCRay ray;
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ray.org = p;
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ray.dir = normalize(x*vx + y*vy + vz);
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ray.tnear = 0.0f;
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ray.tfar = inf;
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ray.geomID = RTC_INVALID_GEOMETRY_ID;
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ray.primID = RTC_INVALID_GEOMETRY_ID;
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ray.mask = -1;
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ray.time = 0;
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/* intersect ray with scene */
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rtcIntersect(g_scene,ray);
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/* shade background black */
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if (ray.geomID == RTC_INVALID_GEOMETRY_ID) return make_Vec3f(0.0f);
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/* shade all rays that hit something */
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Vec3f color = make_Vec3f(0.0f);
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Vec3f Ns = make_Vec3f(0.0f);
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#if 0 // FIXME: pointer gather not implemented on ISPC for Xeon Phi
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uniform ISPCMesh* varying mesh = g_ispc_scene->meshes[ray.geomID];
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uniform ISPCTriangle* varying tri = &mesh->triangles[ray.primID];
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/* load material ID */
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int materialID = tri->materialID;
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/* interpolate shading normal */
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if (mesh->normals) {
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Vec3f n0 = make_Vec3f(mesh->normals[tri->v0]);
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Vec3f n1 = make_Vec3f(mesh->normals[tri->v1]);
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Vec3f n2 = make_Vec3f(mesh->normals[tri->v2]);
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float u = ray.u, v = ray.v, w = 1.0f-ray.u-ray.v;
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Ns = normalize(w*n0 + u*n1 + v*n2);
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} else {
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Ns = normalize(ray.Ng);
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}
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#else
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int materialID = 0;
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foreach_unique (geomID in ray.geomID)
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{
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uniform ISPCMesh* uniform mesh = g_ispc_scene->meshes[geomID];
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foreach_unique (primID in ray.primID)
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{
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uniform ISPCTriangle* uniform tri = &mesh->triangles[primID];
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/* load material ID */
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materialID = tri->materialID;
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/* interpolate shading normal */
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if (mesh->normals) {
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Vec3f n0 = make_Vec3f(mesh->normals[tri->v0]);
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Vec3f n1 = make_Vec3f(mesh->normals[tri->v1]);
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Vec3f n2 = make_Vec3f(mesh->normals[tri->v2]);
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float u = ray.u, v = ray.v, w = 1.0f-ray.u-ray.v;
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Ns = w*n0 + u*n1 + v*n2;
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} else {
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Ns = normalize(ray.Ng);
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}
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}
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}
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Ns = normalize(Ns);
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#endif
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uniform OBJMaterial* material = (uniform OBJMaterial*) &g_ispc_scene->materials[materialID];
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color = make_Vec3f(material->Kd);
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/* apply ambient light */
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Vec3f Nf = faceforward(Ns,neg(ray.dir),Ns);
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//Vec3f Ng = normalize(ray.Ng);
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//Vec3f Nf = dot(ray.dir,Ng) < 0.0f ? Ng : neg(Ng);
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color = color*dot(ray.dir,Nf); // FIXME: *=
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return color;
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}
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/* task that renders a single screen tile */
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task void renderTile(uniform int* uniform pixels,
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const uniform int width,
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const uniform int height,
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const uniform float time,
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const uniform Vec3f& vx,
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const uniform Vec3f& vy,
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const uniform Vec3f& vz,
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const uniform Vec3f& p,
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const uniform int numTilesX,
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const uniform int numTilesY)
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{
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const uniform int tileY = taskIndex / numTilesX;
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const uniform int tileX = taskIndex - tileY * numTilesX;
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const uniform int x0 = tileX * TILE_SIZE_X;
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const uniform int x1 = min(x0+TILE_SIZE_X,width);
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const uniform int y0 = tileY * TILE_SIZE_Y;
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const uniform int y1 = min(y0+TILE_SIZE_Y,height);
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foreach (y = y0 ... y1, x = x0 ... x1)
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{
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/* calculate pixel color */
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Vec3f color = renderPixel(x,y,vx,vy,vz,p);
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/* write color to framebuffer */
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unsigned int r = (unsigned int) (255.0f * clamp(color.x,0.0f,1.0f));
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unsigned int g = (unsigned int) (255.0f * clamp(color.y,0.0f,1.0f));
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unsigned int b = (unsigned int) (255.0f * clamp(color.z,0.0f,1.0f));
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pixels[y*width+x] = (b << 16) + (g << 8) + r;
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}
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}
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/* rtcCommitThread called by all ISPC worker threads to enable parallel build */
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#if defined(PARALLEL_COMMIT)
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task void parallelCommit(RTCScene scene) {
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rtcCommitThread (scene,threadIndex,threadCount);
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}
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#endif
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/* called by the C++ code to render */
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export void device_render (uniform int* uniform pixels,
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const uniform int width,
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const uniform int height,
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const uniform float time,
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const uniform Vec3f& vx,
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const uniform Vec3f& vy,
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const uniform Vec3f& vz,
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const uniform Vec3f& p)
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{
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/* create scene */
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if (g_scene == NULL)
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{
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g_scene = convertScene(g_ispc_scene);
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#if !defined(PARALLEL_COMMIT)
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rtcCommit (g_scene);
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#else
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launch[ getNumHWThreads() ] parallelCommit(g_scene); sync;
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#endif
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}
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/* render image */
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const uniform int numTilesX = (width +TILE_SIZE_X-1)/TILE_SIZE_X;
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const uniform int numTilesY = (height+TILE_SIZE_Y-1)/TILE_SIZE_Y;
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launch[numTilesX*numTilesY] renderTile(pixels,width,height,time,vx,vy,vz,p,numTilesX,numTilesY); sync;
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rtcDebug();
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}
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/* called by the C++ code for cleanup */
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export void device_cleanup ()
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{
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rtcDeleteScene (g_scene);
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rtcExit();
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}
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