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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "point_geometry_device.h"
namespace embree {
/* all features required by this tutorial */
#define FEATURE_MASK \
RTC_FEATURE_FLAG_TRIANGLE | \
RTC_FEATURE_FLAG_ORIENTED_DISC_POINT | \
RTC_FEATURE_FLAG_DISC_POINT | \
RTC_FEATURE_FLAG_SPHERE_POINT
RTCScene g_scene = nullptr;
TutorialData data;
/* add point geometry */
void addPoints (RTCScene scene, RTCGeometryType gtype, const Vec3fa& pos)
{
RandomSampler rng;
RandomSampler_init(rng, 42);
#define COORD RandomSampler_get1D(rng) * 4.f - 2.f
#define RADIUS RandomSampler_get1D(rng) * 0.13f + 0.02f
#define COLOR RandomSampler_get1D(rng)
#define NORMAL RandomSampler_get1D(rng) * 2.f - 1.f
RTCGeometry geom = rtcNewGeometry (g_device, gtype);
Vec4f* point_vertices = (Vec4f*)rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT4, sizeof(Vec4f), NUM_POINTS);
for (int i = 0; i < NUM_POINTS; i++)
{
const float vx = COORD;
const float vy = COORD;
const float vz = COORD;
const float vr = RADIUS;
point_vertices[i] = Vec4f(pos.x,pos.y,pos.z,0.0f) + Vec4f(vx, vy, vz, vr);
const float cr = COLOR;
const float cg = COLOR;
const float cb = COLOR;
data.point_colors[i] = Vec3fa(cr,cg,cb);
}
if (gtype == RTC_GEOMETRY_TYPE_ORIENTED_DISC_POINT) {
Vec3fa* point_normals = (Vec3fa*)rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_NORMAL, 0, RTC_FORMAT_FLOAT3, sizeof(Vec3fa), NUM_POINTS);
for (int i = 0; i < NUM_POINTS; i++) {
const float nx = NORMAL;
const float ny = NORMAL;
const float nz = NORMAL;
point_normals[i] = Vec3fa(nx,ny,nz);
point_normals[i] = normalize(point_normals[i]);
}
}
rtcCommitGeometry(geom);
rtcAttachGeometry(scene,geom);
rtcReleaseGeometry(geom);
}
/* adds a ground plane to the scene */
unsigned int addGroundPlane (RTCScene scene_i)
{
/* create a triangulated plane with 2 triangles and 4 vertices */
RTCGeometry geom = rtcNewGeometry (g_device, RTC_GEOMETRY_TYPE_TRIANGLE);
/* set vertices */
Vertex* vertices = (Vertex*) rtcSetNewGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT3, sizeof(Vertex), 4);
vertices[0].x = -10; vertices[0].y = -2; vertices[0].z = -10;
vertices[1].x = -10; vertices[1].y = -2; vertices[1].z = +10;
vertices[2].x = +10; vertices[2].y = -2; vertices[2].z = -10;
vertices[3].x = +10; vertices[3].y = -2; vertices[3].z = +10;
/* set triangles */
Triangle* triangles = (Triangle*) rtcSetNewGeometryBuffer(geom, RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT3, sizeof(Triangle), 2);
triangles[0].v0 = 0; triangles[0].v1 = 1; triangles[0].v2 = 2;
triangles[1].v0 = 1; triangles[1].v1 = 3; triangles[1].v2 = 2;
rtcCommitGeometry(geom);
unsigned int geomID = rtcAttachGeometry(scene_i,geom);
rtcReleaseGeometry(geom);
return geomID;
}
/* called by the C++ code for initialization */
extern "C" void device_init (char* cfg)
{
/* create scene */
TutorialData_Constructor(&data);
g_scene = data.g_scene = rtcNewScene(g_device);
/* add ground plane */
addGroundPlane(g_scene);
/* add curve */
addPoints(g_scene, RTC_GEOMETRY_TYPE_SPHERE_POINT, Vec3fa( 0.0f, 0.0f, 0.0f));
addPoints(g_scene, RTC_GEOMETRY_TYPE_DISC_POINT, Vec3fa( 5.0f, 0.0f, 0.0f));
addPoints(g_scene, RTC_GEOMETRY_TYPE_ORIENTED_DISC_POINT, Vec3fa(-5.0f, 0.0f, 0.0f));
/* commit changes to scene */
rtcCommitScene (g_scene);
}
/* task that renders a single screen tile */
void renderPixelStandard(const TutorialData& data,
int x, int y,
int* pixels,
const unsigned int width,
const unsigned int height,
const float time,
const ISPCCamera& camera, RayStats& stats)
{
/* initialize ray */
Ray ray(Vec3fa(camera.xfm.p), Vec3fa(normalize(x*camera.xfm.l.vx + y*camera.xfm.l.vy + camera.xfm.l.vz)), 0.0f, inf);
/* intersect ray with scene */
RTCIntersectArguments iargs;
rtcInitIntersectArguments(&iargs);
iargs.feature_mask = (RTCFeatureFlags)(FEATURE_MASK);
rtcIntersect1(data.g_scene,RTCRayHit_(ray),&iargs);
RayStats_addRay(stats);
/* shade pixels */
Vec3fa color = Vec3fa(0.0f);
if (ray.geomID != RTC_INVALID_GEOMETRY_ID)
{
/* interpolate diffuse color */
Vec3fa diffuse = data.point_colors[ray.geomID ? ray.primID : 0];
/* calculate smooth shading normal */
Vec3fa Ng = normalize(ray.Ng);
color = color + diffuse*0.5f;
Vec3fa lightDir = normalize(Vec3fa(-1,-1,-1));
/* initialize shadow ray */
Ray shadow(ray.org + ray.tfar*ray.dir, neg(lightDir), 0.001f, inf, 0.0f);
/* trace shadow ray */
RTCOccludedArguments sargs;
rtcInitOccludedArguments(&sargs);
sargs.feature_mask = (RTCFeatureFlags)(FEATURE_MASK);
rtcOccluded1(data.g_scene,RTCRay_(shadow),&sargs);
RayStats_addShadowRay(stats);
/* add light contribution */
if (shadow.tfar >= 0.0f) {
Vec3fa r = normalize(reflect(ray.dir,Ng));
float s = pow(clamp(dot(r,lightDir),0.0f,1.0f),10.0f);
float d = clamp(-dot(lightDir,Ng),0.0f,1.0f);
color = color + diffuse*d + 0.5f*Vec3fa(s);
}
}
/* write color to framebuffer */
unsigned int r = (unsigned int) (255.0f * clamp(color.x,0.0f,1.0f));
unsigned int g = (unsigned int) (255.0f * clamp(color.y,0.0f,1.0f));
unsigned int b = (unsigned int) (255.0f * clamp(color.z,0.0f,1.0f));
pixels[y*width+x] = (b << 16) + (g << 8) + r;
}
/* task that renders a single screen tile */
void renderTileTask (int taskIndex, int threadIndex, int* pixels,
const unsigned int width,
const unsigned int height,
const float time,
const ISPCCamera& camera,
const int numTilesX,
const int numTilesY)
{
const unsigned int tileY = taskIndex / numTilesX;
const unsigned int tileX = taskIndex - tileY * numTilesX;
const unsigned int x0 = tileX * TILE_SIZE_X;
const unsigned int x1 = min(x0+TILE_SIZE_X,width);
const unsigned int y0 = tileY * TILE_SIZE_Y;
const unsigned int y1 = min(y0+TILE_SIZE_Y,height);
for (unsigned int y=y0; y<y1; y++) for (unsigned int x=x0; x<x1; x++)
{
renderPixelStandard(data,x,y,pixels,width,height,time,camera,g_stats[threadIndex]);
}
}
extern "C" void renderFrameStandard (int* pixels,
const unsigned int width,
const unsigned int height,
const float time,
const ISPCCamera& camera)
{
#if defined(EMBREE_SYCL_TUTORIAL) && !defined(EMBREE_SYCL_RT_SIMULATION)
TutorialData ldata = data;
sycl::event event = global_gpu_queue->submit([=](sycl::handler& cgh){
const sycl::nd_range<2> nd_range = make_nd_range(height,width);
cgh.parallel_for(nd_range,[=](sycl::nd_item<2> item) {
const unsigned int x = item.get_global_id(1); if (x >= width ) return;
const unsigned int y = item.get_global_id(0); if (y >= height) return;
RayStats stats;
renderPixelStandard(ldata,x,y,pixels,width,height,time,camera,stats);
});
});
global_gpu_queue->wait_and_throw();
const auto t0 = event.template get_profiling_info<sycl::info::event_profiling::command_start>();
const auto t1 = event.template get_profiling_info<sycl::info::event_profiling::command_end>();
const double dt = (t1-t0)*1E-9;
((ISPCCamera*)&camera)->render_time = dt;
#else
const int numTilesX = (width +TILE_SIZE_X-1)/TILE_SIZE_X;
const int numTilesY = (height+TILE_SIZE_Y-1)/TILE_SIZE_Y;
parallel_for(size_t(0),size_t(numTilesX*numTilesY),[&](const range<size_t>& range) {
const int threadIndex = (int)TaskScheduler::threadIndex();
for (size_t i=range.begin(); i<range.end(); i++)
renderTileTask((int)i,threadIndex,pixels,width,height,time,camera,numTilesX,numTilesY);
});
#endif
}
/* called by the C++ code to render */
extern "C" void device_render (int* pixels,
const unsigned int width,
const unsigned int height,
const float time,
const ISPCCamera& camera)
{
}
/* called by the C++ code for cleanup */
extern "C" void device_cleanup ()
{
TutorialData_Destructor(&data);
}
} // namespace embree
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