private final void work(int jobId) throws InterruptedException {
Scene scene = manager.bufferedScene();
Random random = state.random;
Ray ray = state.ray;
int width = scene.canvasWidth();
int height = scene.canvasHeight();
double halfWidth = width/(2.0*height);
// calculate pixel bounds for this job
int xjobs = (width+(manager.tileWidth-1))/manager.tileWidth;
int x0 = manager.tileWidth * (jobId % xjobs);
int x1 = Math.min(x0 + manager.tileWidth, width);
int y0 = manager.tileWidth * (jobId / xjobs);
int y1 = Math.min(y0 + manager.tileWidth, height);
double[] samples = scene.getSampleBuffer();
final Camera cam = scene.camera();
long jobStart = System.nanoTime();
if (scene.pathTrace()) {
// this is intentionally incorrectly indented for readability
for (int y = y0; y < y1; ++y) {
int offset = y * width * 3 + x0 * 3;
for (int x = x0; x < x1; ++x) {
double sr = 0;
double sg = 0;
double sb = 0;
for (int i = 0; i < RenderConstants.SPP_PASS; ++i) {
double oy = random.nextDouble();
double ox = random.nextDouble();
cam.calcViewRay(ray, random, (-halfWidth + (x + ox)
/ height), (-.5 + (y + oy) / height));
scene.pathTrace(state);
sr += ray.color.x;
sg += ray.color.y;
sb += ray.color.z;
}
double sinv = 1.0 / (scene.spp + RenderConstants.SPP_PASS);
samples[offset+0] = (samples[offset+0] * scene.spp + sr) * sinv;
samples[offset+1] = (samples[offset+1] * scene.spp + sg) * sinv;
samples[offset+2] = (samples[offset+2] * scene.spp + sb) * sinv;
if (scene.finalizeBuffer()) {
scene.finalizePixel(x, y);
}
offset += 3;
}
}
} else {
Ray target = state.rayPool.get(ray);
scene.trace(target);
int tx = (int) QuickMath.floor(target.x.x + target.d.x * Ray.OFFSET);
int ty = (int) QuickMath.floor(target.x.y + target.d.y * Ray.OFFSET);
int tz = (int) QuickMath.floor(target.x.z + target.d.z * Ray.OFFSET);