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// Copyright 2009-2020 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "../common/tutorial/tutorial_device.h"
#include "../common/tutorial/optics.h"
namespace embree {
/* scene data */
RTCScene g_scene = nullptr;
#define NUM_VERTICES 9
#define NUM_CURVES 6
#define W 2.0f
float hair_vertices[NUM_VERTICES][4] =
{
{ -1.0f, 0.0f, - W, 0.2f },
{ +0.0f,-1.0f, +0.0f, 0.2f },
{ +1.0f, 0.0f, + W, 0.2f },
{ -1.0f, 0.0f, + W, 0.2f },
{ +0.0f,+1.0f, +0.0f, 0.6f },
{ +1.0f, 0.0f, - W, 0.2f },
{ -1.0f, 0.0f, - W, 0.2f },
{ +0.0f,-1.0f, +0.0f, 0.2f },
{ +1.0f, 0.0f, + W, 0.2f },
};
float hair_normals[NUM_VERTICES][4] =
{
{ -1.0f, 0.0f, 0.0f, 0.0f },
{ 0.0f, +1.0f, 0.0f, 0.0f },
{ +1.0f, 0.0f, 0.0f, 0.0f },
{ 0.0f, -1.0f, 0.0f, 0.0f },
{ -1.0f, 0.0f, 0.0f, 0.0f },
{ 0.0f, +1.0f, 0.0f, 0.0f },
{ +1.0f, 0.0f, 0.0f, 0.0f },
{ 0.0f, -1.0f, 0.0f, 0.0f },
{ -1.0f, 0.0f, 0.0f, 0.0f },
};
float hair_vertex_colors[NUM_VERTICES][4] =
{
{ 1.0f, 1.0f, 0.0f, 0.0f },
{ 1.0f, 0.0f, 0.0f, 0.0f },
{ 1.0f, 1.0f, 0.0f, 0.0f },
{ 0.0f, 0.0f, 1.0f, 0.0f },
{ 1.0f, 1.0f, 1.0f, 0.0f },
{ 1.0f, 0.0f, 0.0f, 0.0f },
{ 1.0f, 1.0f, 0.0f, 0.0f },
{ 1.0f, 0.0f, 0.0f, 0.0f },
{ 1.0f, 1.0f, 0.0f, 0.0f },
};
unsigned int hair_indices[NUM_CURVES] = {
0, 1, 2, 3, 4, 5
};
unsigned int hair_indices_linear[NUM_CURVES] = {
1, 2, 3, 4, 5, 6
};
char hair_flags_linear[NUM_CURVES] = {
0x3, 0x3, 0x3, 0x3, 0x3, 0x3
};
/* add hair geometry */
unsigned int addCurve (RTCScene scene, RTCGeometryType gtype, const Vec4f& pos)
{
RTCGeometry geom = rtcNewGeometry (g_device, gtype);
rtcSetGeometryVertexAttributeCount(geom,1);
if (gtype == RTC_GEOMETRY_TYPE_FLAT_LINEAR_CURVE || gtype == RTC_GEOMETRY_TYPE_ROUND_LINEAR_CURVE || gtype == RTC_GEOMETRY_TYPE_CONE_LINEAR_CURVE)
rtcSetSharedGeometryBuffer(geom,RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT, hair_indices_linear,0, sizeof(unsigned int), NUM_CURVES);
else
rtcSetSharedGeometryBuffer(geom,RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT, hair_indices, 0, sizeof(unsigned int), NUM_CURVES);
Vec4f* verts = (Vec4f*)rtcSetNewGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT4, sizeof(Vec4f), NUM_VERTICES);
for (int i = 0; i < NUM_VERTICES; i++) {
verts[i] = pos + Vec4f(hair_vertices[i][0],hair_vertices[i][1], hair_vertices[i][2], hair_vertices[i][3]);
}
if (gtype == RTC_GEOMETRY_TYPE_NORMAL_ORIENTED_BEZIER_CURVE ||
gtype == RTC_GEOMETRY_TYPE_NORMAL_ORIENTED_BSPLINE_CURVE ||
gtype == RTC_GEOMETRY_TYPE_NORMAL_ORIENTED_CATMULL_ROM_CURVE) {
rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_NORMAL, 0, RTC_FORMAT_FLOAT3, hair_normals, 0, sizeof(Vec3fa), NUM_VERTICES);
}
if (gtype == RTC_GEOMETRY_TYPE_ROUND_LINEAR_CURVE || gtype == RTC_GEOMETRY_TYPE_CONE_LINEAR_CURVE) {
rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_FLAGS, 0, RTC_FORMAT_UCHAR, hair_flags_linear, 0, sizeof(char), NUM_CURVES);
}
rtcSetSharedGeometryBuffer(geom,RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE, 0, RTC_FORMAT_FLOAT3, hair_vertex_colors, 0, sizeof(Vec3fa), NUM_VERTICES);
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 = -15; vertices[0].y = -2; vertices[0].z = -15;
vertices[1].x = -15; vertices[1].y = -2; vertices[1].z = +15;
vertices[2].x = +15; vertices[2].y = -2; vertices[2].z = -15;
vertices[3].x = +15; vertices[3].y = -2; vertices[3].z = +15;
/* 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 = rtcNewScene(g_device);
/* add ground plane */
addGroundPlane(g_scene);
/* add curves */
addCurve(g_scene, RTC_GEOMETRY_TYPE_CONE_LINEAR_CURVE, Vec4f(-5.5f, 0.0f, 3.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_ROUND_LINEAR_CURVE, Vec4f(-2.5f, 0.0f, 3.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_FLAT_BSPLINE_CURVE, Vec4f(0.5f, 0.0f, 3.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_ROUND_BSPLINE_CURVE, Vec4f(3.5f, 0.0f, 3.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_NORMAL_ORIENTED_BSPLINE_CURVE, Vec4f(+6.0f, 0.0f, 3.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_FLAT_LINEAR_CURVE, Vec4f(-4.5f, 0.0f, -2.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_FLAT_CATMULL_ROM_CURVE, Vec4f(-1.5f, 0.0f, -2.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_ROUND_CATMULL_ROM_CURVE, Vec4f(1.5f, 0.0f, -2.f, 0.0f));
addCurve(g_scene, RTC_GEOMETRY_TYPE_NORMAL_ORIENTED_CATMULL_ROM_CURVE, Vec4f(+4.5f, 0.0f, -2.f, 0.0f));
/* commit changes to scene */
rtcCommitScene (g_scene);
}
/* task that renders a single screen tile */
Vec3fa renderPixelStandard(float x, float y, const ISPCCamera& camera, RayStats& stats)
{
RTCIntersectContext context;
rtcInitIntersectContext(&context);
/* 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 */
rtcIntersect1(g_scene,&context,RTCRayHit_(ray));
RayStats_addRay(stats);
/* shade pixels */
Vec3fa color = Vec3fa(0.0f);
if (ray.geomID != RTC_INVALID_GEOMETRY_ID)
{
/* interpolate diffuse color */
Vec3fa diffuse = Vec3fa(1.0f,0.0f,0.0f);
if (ray.geomID > 0)
{
unsigned int geomID = ray.geomID; {
rtcInterpolate0(rtcGetGeometry(g_scene,geomID),ray.primID,ray.u,ray.v,RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE,0,&diffuse.x,3);
}
diffuse = 0.5f*diffuse;
}
/* 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 */
rtcOccluded1(g_scene,&context,RTCRay_(shadow));
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);
}
}
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);
}
extern "C" void renderFrameStandard (int* pixels,
const unsigned int width,
const unsigned int height,
const float time,
const ISPCCamera& camera)
{
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)
{
}
/* called by the C++ code for cleanup */
extern "C" void device_cleanup ()
{
rtcReleaseScene (g_scene); g_scene = nullptr;
}
} // namespace embree
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