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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "../common/tutorial/tutorial_device.h"
namespace embree {
#if 0
const int numSpheres = 1000;
const int numPhi = 5;
#else
const int numSpheres = 20;
const int numPhi = 120;
//const int numPhi = 256;
#endif
const int numTheta = 2 * numPhi;
/* scene data */
RTCScene g_scene = nullptr;
RTCScene g_scene_0 = nullptr;
RTCScene g_scene_1 = nullptr;
RTCScene g_scene_2 = nullptr;
RTCScene* g_curr_scene = nullptr;
Vec3fa position[numSpheres];
Vec3fa colors0[numSpheres + 1];
Vec3fa colors1[numSpheres/2 + 1];
Vec3fa colors2[numSpheres/2 + 1];
Vec3fa* colors;
float radius[numSpheres];
int disabledID = -1;
int g_scene_id = 0;
/* adds a sphere to the scene */
unsigned int createSphere(RTCScene scene, RTCBuildQuality quality, const Vec3fa& pos, const float r)
{
/* create a triangulated sphere */
RTCGeometry geom = rtcNewGeometry(g_device, RTC_GEOMETRY_TYPE_TRIANGLE);
rtcSetGeometryBuildQuality(geom, quality);
/* map triangle and vertex buffer */
Vertex* vertices = (Vertex*)rtcSetNewGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT3, sizeof(Vertex), numTheta * (numPhi + 1));
Triangle* triangles = (Triangle*)rtcSetNewGeometryBuffer(geom, RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT3, sizeof(Triangle), 2 * numTheta * (numPhi - 1));
/* create sphere geometry */
int tri = 0;
const float rcpNumTheta = rcp((float)numTheta);
const float rcpNumPhi = rcp((float)numPhi);
for (int phi = 0; phi <= numPhi; phi++)
{
for (int theta = 0; theta < numTheta; theta++)
{
const float phif = phi * float(pi) * rcpNumPhi;
const float thetaf = theta * 2.0f * float(pi) * rcpNumTheta;
Vertex& v = vertices[phi * numTheta + theta];
v.x = pos.x + r * sin(phif) * sin(thetaf);
v.y = pos.y + r * cos(phif);
v.z = pos.z + r * sin(phif) * cos(thetaf);
}
if (phi == 0) continue;
for (int theta = 1; theta <= numTheta; theta++)
{
int p00 = (phi - 1) * numTheta + theta - 1;
int p01 = (phi - 1) * numTheta + theta % numTheta;
int p10 = phi * numTheta + theta - 1;
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);
unsigned int geomID = rtcAttachGeometry(scene, geom);
rtcReleaseGeometry(geom);
return geomID;
}
/* 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 */
g_scene_0 = rtcNewScene(g_device);
g_scene_1 = rtcNewScene(g_device);
g_scene_2 = rtcNewScene(g_device);
rtcSetSceneFlags(g_scene_0,RTC_SCENE_FLAG_DYNAMIC | RTC_SCENE_FLAG_ROBUST);
rtcSetSceneBuildQuality(g_scene_0,RTC_BUILD_QUALITY_LOW);
rtcSetSceneFlags(g_scene_1,RTC_SCENE_FLAG_DYNAMIC | RTC_SCENE_FLAG_ROBUST);
rtcSetSceneBuildQuality(g_scene_1,RTC_BUILD_QUALITY_LOW);
//rtcSetSceneFlags(g_scene_2,RTC_SCENE_FLAG_DYNAMIC | RTC_SCENE_FLAG_ROBUST);
//rtcSetSceneBuildQuality(g_scene_2,RTC_BUILD_QUALITY_LOW);
/* create some triangulated spheres */
for (int i = 0; i < numSpheres; i++)
{
const float phi = i * 2.0f * float(pi) / numSpheres;
const float r = 2.0f * float(pi) / numSpheres;
const Vec3fa p = 2.0f * Vec3fa(sin(phi), 0.0f, -cos(phi));
//RTCBuildQuality quality = i%3 == 0 ? RTC_BUILD_QUALITY_MEDIUM : i%3 == 1 ? RTC_BUILD_QUALITY_REFIT : RTC_BUILD_QUALITY_LOW;
RTCBuildQuality quality = i % 2 ? RTC_BUILD_QUALITY_REFIT : RTC_BUILD_QUALITY_LOW;
//RTCBuildQuality quality = RTC_BUILD_QUALITY_REFIT;
//RTCBuildQuality quality = RTC_BUILD_QUALITY_LOW;
int id0 = createSphere(g_scene_0, quality, p, r);
position[id0] = p;
radius[id0] = r;
colors0[id0].x = (i % 16 + 1) / 17.0f;
colors0[id0].y = (i % 8 + 1) / 9.0f;
colors0[id0].z = (i % 4 + 1) / 5.0f;
if (i < (numSpheres / 2)) {
int id1 = rtcAttachGeometry(g_scene_1, rtcGetGeometry (g_scene_0, id0));
colors1[id1] = colors0[id0];
}
else {
int id2 = rtcAttachGeometry(g_scene_2, rtcGetGeometry(g_scene_0, id0));
colors2[id2] = colors0[id0];
}
}
/* add ground plane to scene */
int id0 = addGroundPlane(g_scene_0);
int id1 = rtcAttachGeometry(g_scene_1, rtcGetGeometry(g_scene_0, id0));
int id2 = rtcAttachGeometry(g_scene_2, rtcGetGeometry(g_scene_0, id0));
colors0[id0] = Vec3fa(1.0f, 1.0f, 1.0f);
colors1[id1] = colors0[id0];
colors2[id2] = colors0[id0];
/* commit changes to scene */
rtcCommitScene(g_scene_0);
rtcCommitScene(g_scene_1);
rtcCommitScene(g_scene_2);
/* First render scene1 to check if it got properly
* committed even though scene_0 containing all
* geometries got already build. */
g_scene_id = 1;
}
/* animates the sphere */
void animateSphere(int taskIndex, int threadIndex, Vertex* vertices,
const float rcpNumTheta,
const float rcpNumPhi,
const Vec3fa& pos,
const float r,
const float f)
{
int phi = taskIndex;
for (unsigned int theta = 0; theta < numTheta; theta++)
{
Vertex* v = &vertices[phi * numTheta + theta];
const float phif = phi * float(pi) * rcpNumPhi;
const float thetaf = theta * 2.0f * float(pi) * rcpNumTheta;
v->x = pos.x + r * sin(f * phif) * sin(thetaf);
v->y = pos.y + r * cos(phif);
v->z = pos.z + r * sin(f * phif) * cos(thetaf);
}
}
/* task that renders a single screen tile */
Vec3fa renderPixelStandard(float x, float y, 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 */
RTCIntersectContext context;
rtcInitIntersectContext(&context);
rtcIntersect1(*g_curr_scene, &context, RTCRayHit_(ray));
RayStats_addRay(stats);
/* shade pixels */
Vec3fa color = Vec3fa(0.0f);
if (ray.geomID != RTC_INVALID_GEOMETRY_ID)
{
Vec3fa diffuse = colors[ray.geomID];
color = color + diffuse * 0.1f;
Vec3fa lightDir = normalize(Vec3fa(-1, -1, -1));
/* initialize shadow ray */
Ray shadow(ray.org + ray.tfar * ray.dir, neg(lightDir), 0.001f, inf);
/* trace shadow ray */
rtcOccluded1(*g_curr_scene, &context, RTCRay_(shadow));
RayStats_addShadowRay(stats);
/* add light contribution */
if (shadow.tfar >= 0.0f)
color = color + diffuse * clamp(-dot(lightDir, normalize(ray.Ng)), 0.0f, 1.0f);
}
return color;
}
/* renders a single screen tile */
void renderTileStandard(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++)
{
/* calculate pixel color */
Vec3fa color = renderPixelStandard((float)x, (float)y, camera, g_stats[threadIndex]);
/* 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)
{
renderTileStandard(taskIndex, threadIndex, pixels, width, height, time, camera, numTilesX, numTilesY);
}
/* animates a sphere */
void animateSphere(int id, float time)
{
/* animate vertices */
RTCGeometry geom = rtcGetGeometry(g_scene_0, id);
Vertex* vertices = (Vertex*)rtcGetGeometryBufferData(geom, RTC_BUFFER_TYPE_VERTEX, 0);
const float rcpNumTheta = rcp((float)numTheta);
const float rcpNumPhi = rcp((float)numPhi);
const Vec3fa pos = position[id];
const float r = radius[id];
const float f = 2.0f * (1.0f + 0.5f * sin(time));
/* loop over all vertices */
#if 1 // enables parallel execution
parallel_for(size_t(0), size_t(numPhi + 1), [&](const range<size_t>& range) {
const int threadIndex = (int)TaskScheduler::threadIndex();
for (size_t i = range.begin(); i < range.end(); i++)
animateSphere((int)i, threadIndex, vertices, rcpNumTheta, rcpNumPhi, pos, r, f);
});
#else
for (unsigned int phi = 0; phi < numPhi + 1; phi++) for (int theta = 0; theta < numTheta; theta++)
{
Vertex* v = &vertices[phi * numTheta + theta];
const float phif = phi * float(pi) * rcpNumPhi;
const float thetaf = theta * 2.0f * float(pi) * rcpNumTheta;
v->x = pos.x + r * sin(f * phif) * sin(thetaf);
v->y = pos.y + r * cos(phif);
v->z = pos.z + r * sin(f * phif) * cos(thetaf);
}
#endif
/* commit mesh */
rtcUpdateGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX, 0);
rtcCommitGeometry(geom);
}
extern "C" void renderFrameStandard(int* pixels,
const unsigned int width,
const unsigned int height,
const float time,
const ISPCCamera & camera)
{
/* render all pixels */
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);
});
}
/* 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)
{
/* configure rendering of selected scene */
switch (g_scene_id)
{
case 0:
g_curr_scene = &g_scene_0;
colors = &(colors0[0]);
break;
case 1:
g_curr_scene = &g_scene_1;
colors = &(colors1[0]);
break;
case 2:
g_curr_scene = &g_scene_2;
colors = &(colors2[0]);
break;
}
/* animate sphere */
for (int i = 0; i < numSpheres; i++)
animateSphere(i, time + i);
/* commit changes to scene */
//rtcCommitScene(*g_curr_scene);
rtcCommitScene(g_scene_0);
rtcCommitScene(g_scene_1);
rtcCommitScene(g_scene_2);
}
/* called by the C++ code for cleanup */
extern "C" void device_cleanup()
{
rtcReleaseScene(g_scene_0); g_scene_0 = nullptr;
rtcReleaseScene(g_scene_1); g_scene_1 = nullptr;
rtcReleaseScene(g_scene_2); g_scene_2 = nullptr;
}
} // namespace embree
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