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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "instanced_geometry_device.isph"
/* all features required by this tutorial */
#define FEATURE_MASK \
RTC_FEATURE_FLAG_TRIANGLE | \
RTC_FEATURE_FLAG_INSTANCE | \
RTC_FEATURE_FLAG_32_BIT_RAY_MASK
const uniform int numPhi = 5;
const uniform int numTheta = 2*numPhi;
RTCScene g_scene = NULL;
RTCGeometry g_instance0 = NULL;
RTCGeometry g_instance1 = NULL;
RTCGeometry g_instance2 = NULL;
RTCGeometry g_instance3 = NULL;
uniform TutorialData data;
uniform unsigned int createTriangulatedSphere (RTCScene scene, const uniform Vec3f& p, uniform float r)
{
/* create triangle mesh */
RTCGeometry geom = rtcNewGeometry (g_device, RTC_GEOMETRY_TYPE_TRIANGLE);
/* map triangle and vertex buffers */
uniform Vertex* uniform vertices = (uniform Vertex* uniform) rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_VERTEX,0,RTC_FORMAT_FLOAT3,sizeof(uniform Vertex),numTheta*(numPhi+1));
uniform Triangle* uniform triangles = (uniform Triangle* uniform) rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_INDEX,0,RTC_FORMAT_UINT3,sizeof(uniform Triangle),2*numTheta*(numPhi-1));
/* create sphere */
uniform int tri = 0;
const uniform float rcpNumTheta = rcp((uniform float)numTheta);
const uniform float rcpNumPhi = rcp((uniform float)numPhi);
for (uniform int phi=0; phi<=numPhi; phi++)
{
for (uniform int theta=0; theta<numTheta; theta++)
{
const uniform float phif = phi*pi*rcpNumPhi;
const uniform float thetaf = theta*2.0f*pi*rcpNumTheta;
uniform Vertex& v = vertices[phi*numTheta+theta];
v.x = p.x + r*sin(phif)*sin(thetaf);
v.y = p.y + r*cos(phif);
v.z = p.z + r*sin(phif)*cos(thetaf);
}
if (phi == 0) continue;
for (uniform int theta=1; theta<=numTheta; theta++)
{
uniform int p00 = (phi-1)*numTheta+theta-1;
uniform int p01 = (phi-1)*numTheta+theta%numTheta;
uniform int p10 = phi*numTheta+theta-1;
uniform int p11 = phi*numTheta+theta%numTheta;
if (phi > 1) {
triangles[tri].v0 = p10;
triangles[tri].v1 = p01;
triangles[tri].v2 = p00;
tri++;
}
if (phi < numPhi) {
triangles[tri].v0 = p11;
triangles[tri].v1 = p01;
triangles[tri].v2 = p10;
tri++;
}
}
}
rtcCommitGeometry(geom);
uniform unsigned int geomID = rtcAttachGeometry(scene,geom);
rtcReleaseGeometry(geom);
return geomID;
}
/* creates a ground plane */
uniform unsigned int createGroundPlane (RTCScene scene)
{
/* create a triangulated plane with 2 triangles and 4 vertices */
RTCGeometry geom = rtcNewGeometry (g_device, RTC_GEOMETRY_TYPE_TRIANGLE);
/* set vertices */
uniform Vertex* uniform vertices = (uniform Vertex* uniform) rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_VERTEX,0,RTC_FORMAT_FLOAT3,sizeof(uniform 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 */
uniform Triangle* uniform triangles = (uniform Triangle* uniform) rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_INDEX,0,RTC_FORMAT_UINT3,sizeof(uniform 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);
uniform unsigned int geomID = rtcAttachGeometry(scene,geom);
rtcReleaseGeometry(geom);
return geomID;
}
/* called by the C++ code for initialization */
export void device_init (uniform int8* uniform cfg)
{
TutorialData_Constructor(&data);
/* create scene */
data.g_scene = g_scene = rtcNewScene(g_device);
rtcSetSceneBuildQuality(data.g_scene,RTC_BUILD_QUALITY_LOW);
rtcSetSceneFlags(data.g_scene,RTC_SCENE_FLAG_DYNAMIC);
/* create scene with 4 triangulated spheres */
data.g_scene1 = rtcNewScene(g_device);
createTriangulatedSphere(data.g_scene1,make_Vec3f( 0, 0,+1),0.5f);
createTriangulatedSphere(data.g_scene1,make_Vec3f(+1, 0, 0),0.5f);
createTriangulatedSphere(data.g_scene1,make_Vec3f( 0, 0,-1),0.5f);
createTriangulatedSphere(data.g_scene1,make_Vec3f(-1, 0, 0),0.5f);
rtcCommitScene (data.g_scene1);
/* instantiate geometry */
g_instance0 = rtcNewGeometry (g_device, RTC_GEOMETRY_TYPE_INSTANCE);
rtcSetGeometryMask(g_instance0, 0x80); // test high instance mask bits
rtcSetGeometryInstancedScene(g_instance0,data.g_scene1);
rtcSetGeometryTimeStepCount(g_instance0,1);
g_instance1 = rtcNewGeometry (g_device, RTC_GEOMETRY_TYPE_INSTANCE);
rtcSetGeometryInstancedScene(g_instance1,data.g_scene1);
rtcSetGeometryTimeStepCount(g_instance1,1);
g_instance2 = rtcNewGeometry (g_device, RTC_GEOMETRY_TYPE_INSTANCE);
rtcSetGeometryInstancedScene(g_instance2,data.g_scene1);
rtcSetGeometryTimeStepCount(g_instance2,1);
g_instance3 = rtcNewGeometry (g_device, RTC_GEOMETRY_TYPE_INSTANCE);
rtcSetGeometryInstancedScene(g_instance3,data.g_scene1);
rtcSetGeometryTimeStepCount(g_instance3,1);
rtcAttachGeometry(data.g_scene,g_instance0);
rtcAttachGeometry(data.g_scene,g_instance1);
rtcAttachGeometry(data.g_scene,g_instance2);
rtcAttachGeometry(data.g_scene,g_instance3);
rtcReleaseGeometry(g_instance0);
rtcReleaseGeometry(g_instance1);
rtcReleaseGeometry(g_instance2);
rtcReleaseGeometry(g_instance3);
createGroundPlane(data.g_scene);
/* set all colors */
data.colors[4*0+0] = make_Vec3f(0.25f, 0.f, 0.f);
data.colors[4*0+1] = make_Vec3f(0.50f, 0.f, 0.f);
data.colors[4*0+2] = make_Vec3f(0.75f, 0.f, 0.f);
data.colors[4*0+3] = make_Vec3f(1.00f, 0.f, 0.f);
data.colors[4*1+0] = make_Vec3f(0.f, 0.25f, 0.f);
data.colors[4*1+1] = make_Vec3f(0.f, 0.50f, 0.f);
data.colors[4*1+2] = make_Vec3f(0.f, 0.75f, 0.f);
data.colors[4*1+3] = make_Vec3f(0.f, 1.00f, 0.f);
data.colors[4*2+0] = make_Vec3f(0.f, 0.f, 0.25f);
data.colors[4*2+1] = make_Vec3f(0.f, 0.f, 0.50f);
data.colors[4*2+2] = make_Vec3f(0.f, 0.f, 0.75f);
data.colors[4*2+3] = make_Vec3f(0.f, 0.f, 1.00f);
data.colors[4*3+0] = make_Vec3f(0.25f, 0.25f, 0.f);
data.colors[4*3+1] = make_Vec3f(0.50f, 0.50f, 0.f);
data.colors[4*3+2] = make_Vec3f(0.75f, 0.75f, 0.f);
data.colors[4*3+3] = make_Vec3f(1.00f, 1.00f, 0.f);
}
/* task that renders a single screen tile */
Vec3f renderPixel(const uniform TutorialData& data, float x, float y, const uniform ISPCCamera& camera, uniform RayStats& stats)
{
/* initialize ray */
Ray ray = make_Ray(make_Vec3f(camera.xfm.p), make_Vec3f(normalize(x*camera.xfm.l.vx + y*camera.xfm.l.vy + camera.xfm.l.vz)), 0.0f, inf);
/* intersect ray with scene */
uniform RTCIntersectArguments iargs;
rtcInitIntersectArguments(&iargs);
iargs.feature_mask = (uniform RTCFeatureFlags) (FEATURE_MASK);
rtcTraversableIntersectV(data.g_traversable,RTCRayHit_(ray),&iargs);
RayStats_addRay(stats);
/* shade pixels */
Vec3f color = make_Vec3f(0.0f);
if (ray.geomID != RTC_INVALID_GEOMETRY_ID)
{
/* calculate shading normal in world space */
Vec3f Ns = ray.Ng;
if (ray.instID[0] != RTC_INVALID_GEOMETRY_ID)
{
AffineSpace3f xfm;
rtcGetGeometryTransformFromTraversable(data.g_traversable,ray.instID[0],0.0f,RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR,&xfm);
Ns = xfmNormal(xfm,Ns);
//Ns = xfmVector(data.normal_xfm[ray.instID[0]],Ns);
}
Ns = normalize(Ns);
/* calculate diffuse color of geometries */
Vec3f diffuse = make_Vec3f(1,1,1);
if (ray.instID[0] != RTC_INVALID_GEOMETRY_ID)
diffuse = data.colors[4*ray.instID[0]+ray.geomID];
color = color + diffuse*0.5;
/* initialize shadow ray */
Vec3f lightDir = normalize(make_Vec3f(-1,-1,-1));
Ray shadow = make_Ray(ray.org + ray.tfar*ray.dir, neg(lightDir), 0.001f, inf);
/* trace shadow ray */
uniform RTCOccludedArguments sargs;
rtcInitOccludedArguments(&sargs);
sargs.feature_mask = (uniform RTCFeatureFlags) (FEATURE_MASK);
rtcTraversableOccludedV(data.g_traversable,RTCRay_(shadow),&sargs);
RayStats_addShadowRay(stats);
/* add light contribution */
if (shadow.tfar >= 0.0f)
color = color + diffuse*clamp(-dot(lightDir,Ns),0.0f,1.0f);
}
return color;
}
void renderPixelStandard(const uniform TutorialData& data,
int x, int y,
uniform int* uniform pixels,
const uniform unsigned int width,
const uniform unsigned int height,
const uniform float time,
const uniform ISPCCamera& camera, uniform RayStats& stats)
{
/* calculate pixel color */
Vec3f color = renderPixel(data, (float)x,(float)y,camera, stats);
/* 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;
}
/* renders a single screen tile */
void renderTileStandard(uniform int taskIndex,
uniform int threadIndex,
uniform int* uniform pixels,
const uniform unsigned int width,
const uniform unsigned int height,
const uniform float time,
const uniform ISPCCamera& camera,
const uniform int numTilesX,
const uniform int numTilesY)
{
const uniform unsigned int tileY = taskIndex / numTilesX;
const uniform unsigned int tileX = taskIndex - tileY * numTilesX;
const uniform unsigned int x0 = tileX * TILE_SIZE_X;
const uniform unsigned int x1 = min(x0+TILE_SIZE_X,width);
const uniform unsigned int y0 = tileY * TILE_SIZE_Y;
const uniform unsigned int y1 = min(y0+TILE_SIZE_Y,height);
foreach_tiled (y = y0 ... y1, x = x0 ... x1)
{
renderPixelStandard(data,x,y,pixels,width,height,time,camera,g_stats[threadIndex]);
}
}
/* task that renders a single screen tile */
task void renderTileTask(uniform int* uniform pixels,
const uniform unsigned int width,
const uniform unsigned int height,
const uniform float time,
const uniform ISPCCamera& camera,
const uniform int numTilesX,
const uniform int numTilesY)
{
renderTileStandard(taskIndex,threadIndex,pixels,width,height,time,camera,numTilesX,numTilesY);
}
export void renderFrameStandard (uniform int* uniform pixels,
const uniform unsigned int width,
const uniform unsigned int height,
const uniform float time,
const uniform ISPCCamera& camera)
{
/* render all pixels */
#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 uniform int numTilesX = (width +TILE_SIZE_X-1)/TILE_SIZE_X;
const uniform int numTilesY = (height+TILE_SIZE_Y-1)/TILE_SIZE_Y;
launch[numTilesX*numTilesY] renderTileTask(pixels,width,height,time,camera,numTilesX,numTilesY); sync;
#endif
}
/* called by the C++ code to render */
export void device_render (uniform int* uniform pixels,
const uniform unsigned int width,
const uniform unsigned int height,
const uniform float time,
const uniform ISPCCamera& camera)
{
uniform float t0 = 0.7f*time;
uniform float t1 = 1.5f*time;
/* rotate instances around themselves */
uniform LinearSpace3f xfm;
xfm.vx = make_Vec3f(cos(t1),0,sin(t1));
xfm.vy = make_Vec3f(0,1,0);
xfm.vz = make_Vec3f(-sin(t1),0,cos(t1));
/* calculate transformations to move instances in circle */
for (uniform int i=0; i<4; i++) {
uniform float t = t0+i*2.0f*M_PI/4.0f;
data.instance_xfm[i] = make_AffineSpace3f(xfm,2.2f*make_Vec3f(+cos(t),0.0f,+sin(t)));
}
/* calculate transformations to properly transform normals */
for (uniform int i=0; i<4; i++)
data.normal_xfm[i] = transposed(rcp(data.instance_xfm[i].l));
/* set instance transformations */
rtcSetGeometryTransform(g_instance0,0,RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR,(uniform float* uniform)&data.instance_xfm[0]);
rtcSetGeometryTransform(g_instance1,0,RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR,(uniform float* uniform)&data.instance_xfm[1]);
rtcSetGeometryTransform(g_instance2,0,RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR,(uniform float* uniform)&data.instance_xfm[2]);
rtcSetGeometryTransform(g_instance3,0,RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR,(uniform float* uniform)&data.instance_xfm[3]);
/* update scene */
rtcCommitGeometry(g_instance0);
rtcCommitGeometry(g_instance1);
rtcCommitGeometry(g_instance2);
rtcCommitGeometry(g_instance3);
rtcCommitScene (data.g_scene);
data.g_traversable = rtcGetSceneTraversable(data.g_scene);
}
/* called by the C++ code for cleanup */
export void device_cleanup ()
{
TutorialData_Destructor(&data);
}
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