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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "../common/tutorial/tutorial_device.isph"
#include "../common/math/random_sampler.isph"
struct Point
{
ALIGNED_STRUCT_(16)
Vec3f p; //!< position
};
struct PointQueryResult
{
ALIGNED_STRUCT_(16)
unsigned int primID;
};
struct PointQuery
{
Vec3f p;
float time;
float radius;
};
/* scene data */
RTCScene g_scene = NULL;
uniform Point* uniform g_points = NULL;
const uniform int g_num_colors = 27;
uniform Vec3fa g_colors[g_num_colors];
extern uniform int g_num_points;
uniform int g_num_points_current;
void renderTileStandardStream(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);
// ======================================================================== //
// User defined point geometry //
// ======================================================================== //
unmasked void pointBoundsFunc(const struct RTCBoundsFunctionArguments* uniform args)
{
const uniform Point* uniform points = (const uniform Point* uniform) args->geometryUserPtr;
uniform RTCBounds* uniform bounds_o = args->bounds_o;
const uniform Point& point = points[args->primID];
bounds_o->lower_x = point.p.x;
bounds_o->lower_y = point.p.y;
bounds_o->lower_z = point.p.z;
bounds_o->upper_x = point.p.x;
bounds_o->upper_y = point.p.y;
bounds_o->upper_z = point.p.z;
}
unmasked bool pointQueryFunc(RTCPointQueryFunctionArguments* uniform args)
{
assert(args->userPtr);
RTCPointQuery* query = (RTCPointQuery*)args->query;
unsigned int primID = args->primID;
Vec3f q = make_Vec3f(query->x, query->y, query->z);
const Point point = g_points[primID];
const float d = distance(point.p, q);
if(d < query->radius)
{
PointQueryResult* result = (PointQueryResult*)args->userPtr;
result->primID = primID;
query->radius = d;
return true;
}
return false;
}
uniform Point* uniform createPoints (RTCScene scene, uniform unsigned int N)
{
RTCGeometry geom = rtcNewGeometry(g_device, RTC_GEOMETRY_TYPE_USER);
g_points = uniform new uniform Point[N];
uniform unsigned int geomID = rtcAttachGeometry(scene, geom);
rtcSetGeometryUserPrimitiveCount(geom, N);
rtcSetGeometryUserData(geom, g_points);
rtcSetGeometryBoundsFunction(geom, pointBoundsFunc, NULL);
rtcCommitGeometry(geom);
rtcReleaseGeometry(geom);
RandomSampler rs;
RandomSampler_init(rs, 42);
for (unsigned int i = 0; i < N; ++i)
{
float xi1 = RandomSampler_getFloat(rs);
float xi2 = RandomSampler_getFloat(rs);
g_points[i].p = make_Vec3f(xi1, 0.f, xi2);
}
g_num_points_current = N;
return g_points;
}
/* called by the C++ code for initialization */
export void device_init (uniform int8* uniform cfg)
{
/* create scene */
g_scene = rtcNewScene(g_device);
g_points = createPoints(g_scene, g_num_points);
rtcCommitScene(g_scene);
/* set all colors */
for (uniform int r = 0; r < 3; ++r)
for (uniform int g = 0; g < 3; ++g)
for (uniform int b = 0; b < 3; ++b)
g_colors[r * 9 + g * 3 + b] = make_Vec3fa(0.2f + 0.3f * r, 0.2f + 0.3f * g, 0.2f + 0.3f * b);
}
/* 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)
{
if (all(__mask == 0)) continue;
/* calculate pixel color */
Vec3fa color = make_Vec3fa(0.f);
Vec3f q = make_Vec3f(((float)x + 0.5f) / width, 0.f, ((float)y + 0.5f) / height);
PointQuery query;
query.p = q;
query.time = 0.f;
query.radius = inf;
uniform PointQueryResult result[programCount];
result[programIndex].primID = RTC_INVALID_GEOMETRY_ID;
void* userPtr = (void*)&result[programIndex];
uniform RTCPointQueryContext context;
rtcInitPointQueryContext(&context);
rtcPointQueryV(g_scene,
(varying RTCPointQuery* uniform)&query,
&context,
pointQueryFunc,
&userPtr);
unsigned int primID = result[programIndex].primID;
if (primID != RTC_INVALID_GEOMETRY_ID)
color = g_colors[primID % 27];
/* 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 */
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);
}
void splat_color(uniform int* pixels,
const uniform unsigned int width,
const uniform unsigned int height,
const uniform int kernel_size,
float x, float y, Vec3fa const& color)
{
for (int dy = -kernel_size; dy <= kernel_size; ++dy)
for (int dx = -kernel_size; dx <= kernel_size; ++dx)
{
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));
const unsigned int px = (unsigned int)min(width - 1.f, max(0.f, x * width + dx));
const unsigned int py = (unsigned int)min(height - 1.f, max(0.f, y * height + dy));
pixels[py*width + px] = (b << 16) + (g << 8) + r;
}
}
task void drawPoints(uniform int* uniform pixels,
const uniform unsigned int width,
const uniform unsigned int height)
{
Point p = g_points[taskIndex];
Vec3fa color = g_colors[taskIndex % g_num_colors] / 0.8f;
splat_color(pixels, width, height, 2, p.p.x, p.p.z, color);
}
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 */
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;
launch[g_num_points] drawPoints(pixels, width, height); sync;
}
/* 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)
{
if (g_num_points != g_num_points_current)
{
rtcReleaseScene (g_scene);
g_scene = rtcNewScene(g_device);
delete[] g_points; g_points = NULL;
g_points = createPoints(g_scene, g_num_points);
rtcCommitScene(g_scene);
}
}
/* called by the C++ code for cleanup */
export void device_cleanup ()
{
rtcReleaseScene (g_scene); g_scene = NULL;
rtcReleaseDevice(g_device); g_device = NULL;
delete[] g_points; g_points = NULL;
}
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