void TileLayerComponentManager::_fillBuffer(VertexBuffer& buffer, const TileMapSP tileMap, unsigned layer,
float tileWidth, float tileHeight, const Matrix4& wt) const {
buffer.clear();
unsigned width = tileMap->width (layer);
unsigned height = tileMap->height(layer);
Vector2i nTiles(tileMap->tileSetHTiles(), tileMap->tileSetVTiles());
for(unsigned y = 0; y < height; ++y) {
for(unsigned x = 0; x < width; ++x) {
TileMap::TileIndex tile = tileMap->tile(x, y, layer);
if(tile == 0)
continue;
unsigned index = buffer.vertexCount();
Box2 tc = boxView(tileBox(nTiles, tile - 1),
Box2(Vector2(0.001, 0.001), Vector2(0.999, 0.999)));
for(unsigned vi = 0; vi < 4; ++vi) {
unsigned x2 = (vi & 0x01)? 1: 0;
unsigned y2 = (vi & 0x02)? 1: 0;
Vector4 pos = wt * Vector4(( x + x2) * tileWidth,
(height - y - y2) * tileHeight, 0, 1);
buffer.addVertex(SpriteVertex{ pos, Vector4::Constant(1),
tc.corner(Box2::CornerType(x2 + y2*2)) });
}
buffer.addIndex(index + 0);
buffer.addIndex(index + 1);
buffer.addIndex(index + 2);
buffer.addIndex(index + 2);
buffer.addIndex(index + 1);
buffer.addIndex(index + 3);
}
}
}
// SamplerIntegrator Method Definitions
void SamplerIntegrator::Render(const Scene &scene) {
ProfilePhase p(Prof::IntegratorRender);
Preprocess(scene, *sampler);
// Render image tiles in parallel
// Compute number of tiles, _nTiles_, to use for parallel rendering
Bounds2i sampleBounds = camera->film->GetSampleBounds();
Vector2i sampleExtent = sampleBounds.Diagonal();
const int tileSize = 16;
Point2i nTiles((sampleExtent.x + tileSize - 1) / tileSize,
(sampleExtent.y + tileSize - 1) / tileSize);
ProgressReporter reporter(nTiles.x * nTiles.y, "Rendering");
{
StatTimer timer(&renderingTime);
ParallelFor2D([&](Point2i tile) {
// Render section of image corresponding to _tile_
// Allocate _MemoryArena_ for tile
MemoryArena arena;
// Get sampler instance for tile
int seed = tile.y * nTiles.x + tile.x;
std::unique_ptr<Sampler> tileSampler = sampler->Clone(seed);
// Compute sample bounds for tile
int x0 = sampleBounds.pMin.x + tile.x * tileSize;
int x1 = std::min(x0 + tileSize, sampleBounds.pMax.x);
int y0 = sampleBounds.pMin.y + tile.y * tileSize;
int y1 = std::min(y0 + tileSize, sampleBounds.pMax.y);
Bounds2i tileBounds(Point2i(x0, y0), Point2i(x1, y1));
// Get _FilmTile_ for tile
std::unique_ptr<FilmTile> filmTile =
camera->film->GetFilmTile(tileBounds);
// Loop over pixels in tile to render them
for (Point2i pixel : tileBounds) {
{
ProfilePhase pp(Prof::StartPixel);
tileSampler->StartPixel(pixel);
}
do {
// Initialize _CameraSample_ for current sample
CameraSample cameraSample =
tileSampler->GetCameraSample(pixel);
// Generate camera ray for current sample
RayDifferential ray;
Float rayWeight =
camera->GenerateRayDifferential(cameraSample, &ray);
ray.ScaleDifferentials(
1 / std::sqrt((Float)tileSampler->samplesPerPixel));
++nCameraRays;
// Evaluate radiance along camera ray
Spectrum L(0.f);
if (rayWeight > 0) L = Li(ray, scene, *tileSampler, arena);
// Issue warning if unexpected radiance value returned
if (L.HasNaNs()) {
Error(
"Not-a-number radiance value returned "
"for image sample. Setting to black.");
L = Spectrum(0.f);
} else if (L.y() < -1e-5) {
Error(
"Negative luminance value, %f, returned "
"for image sample. Setting to black.",
L.y());
L = Spectrum(0.f);
} else if (std::isinf(L.y())) {
Error(
"Infinite luminance value returned "
"for image sample. Setting to black.");
L = Spectrum(0.f);
}
// Add camera ray's contribution to image
filmTile->AddSample(cameraSample.pFilm, L, rayWeight);
// Free _MemoryArena_ memory from computing image sample
// value
arena.Reset();
} while (tileSampler->StartNextSample());
}
// Merge image tile into _Film_
camera->film->MergeFilmTile(std::move(filmTile));
reporter.Update();
}, nTiles);
reporter.Done();
}
// Save final image after rendering
camera->film->WriteImage();
}