static unsafe void DrawSegments(
NativeArray <SegmentData> segments,
World *worldLODs,
CameraData camera,
int screenWidth,
int screenHeight,
float2 vanishingPointScreenSpace,
RayBuffer.Native rayBufferTopDown,
RayBuffer.Native rayBufferLeftRight,
RayBuffer rayBufferTopDownManaged,
RayBuffer rayBufferLeftRightManaged
)
{
float2 screen = new float2(screenWidth, screenHeight);
Profiler.BeginSample("Segment setup overhead");
DrawSegmentRayJob.DrawContext drawContext = new DrawSegmentRayJob.DrawContext
{
camera = camera,
screen = screen,
worldLODs = worldLODs
};
NativeArray <DrawSegmentRayJob.SegmentContext> segmentContexts = new NativeArray <DrawSegmentRayJob.SegmentContext>(4, Allocator.TempJob, NativeArrayOptions.ClearMemory);
DrawSegmentRayJob.SegmentContext *segmentContextPtr = (DrawSegmentRayJob.SegmentContext *)segmentContexts.GetUnsafePtr();
int totalRays = 0;
for (int segmentIndex = 0; segmentIndex < segments.Length; segmentIndex++)
{
DrawSegmentRayJob.SegmentContext *context = segmentContextPtr + segmentIndex;
context->segment = segments[segmentIndex];
totalRays += segments[segmentIndex].RayCount;
if (segments[segmentIndex].RayCount <= 0)
{
continue;
}
context->axisMappedToY = (segmentIndex > 1) ? 0 : 1;
context->segmentRayIndexOffset = 0;
if (segmentIndex == 1)
{
context->segmentRayIndexOffset = segments[0].RayCount;
}
if (segmentIndex == 3)
{
context->segmentRayIndexOffset = segments[2].RayCount;
}
int2 nextFreePixel;
if (segmentIndex < 2)
{
context->activeRayBufferFull = rayBufferTopDown;
if (segmentIndex == 0) // top segment
{
nextFreePixel = int2(clamp(Mathf.RoundToInt(vanishingPointScreenSpace.y), 0, screenHeight - 1), screenHeight - 1);
}
else // bottom segment
{
nextFreePixel = int2(0, clamp(Mathf.RoundToInt(vanishingPointScreenSpace.y), 0, screenHeight - 1));
}
}
else
{
context->activeRayBufferFull = rayBufferLeftRight;
if (segmentIndex == 3) // left segment
{
nextFreePixel = int2(0, clamp(Mathf.RoundToInt(vanishingPointScreenSpace.x), 0, screenWidth - 1));
}
else // right segment
{
nextFreePixel = int2(clamp(Mathf.RoundToInt(vanishingPointScreenSpace.x), 0, screenWidth - 1), screenWidth - 1);
}
}
context->originalNextFreePixelMin = nextFreePixel.x;
context->originalNextFreePixelMax = nextFreePixel.y;
context->seenPixelCacheLength = (int)ceil(drawContext.screen[context->axisMappedToY]);
}
Profiler.EndSample();
rayBufferTopDownManaged.Prepare(segments[0].RayCount + segments[1].RayCount);
rayBufferLeftRightManaged.Prepare(segments[2].RayCount + segments[3].RayCount);
NativeArray <DrawSegmentRayJob.RayContext> rayContext = new NativeArray <DrawSegmentRayJob.RayContext>(
totalRays, Allocator.TempJob, NativeArrayOptions.UninitializedMemory);
NativeArray <DrawSegmentRayJob.RayDDAContext> rayDDAContext = new NativeArray <DrawSegmentRayJob.RayDDAContext>(
totalRays, Allocator.TempJob, NativeArrayOptions.UninitializedMemory);
NativeList <DrawSegmentRayJob.RayContinuation> rayContinuations = new NativeList <DrawSegmentRayJob.RayContinuation>(
totalRays, Allocator.TempJob);
DrawSegmentRayJob.RaySetupJob raySetupJob = new DrawSegmentRayJob.RaySetupJob()
{
contexts = segmentContexts,
rays = rayContext
};
DrawSegmentRayJob.DDASetupJob ddaSetupJob = new DrawSegmentRayJob.DDASetupJob()
{
raysInput = rayContext,
raysOutput = rayDDAContext,
drawContext = drawContext,
};
DrawSegmentRayJob.TraceToFirstColumnJob firstColumnJob = new DrawSegmentRayJob.TraceToFirstColumnJob
{
drawContext = drawContext,
inRays = rayDDAContext,
outRays = rayContinuations.AsParallelWriter()
};
DrawSegmentRayJob.RenderJob renderJob = new DrawSegmentRayJob.RenderJob
{
rays = rayContinuations,
DrawingContext = drawContext,
};
JobHandle setup = raySetupJob.Schedule(totalRays, 64);
JobHandle ddaSetup = ddaSetupJob.Schedule(totalRays, 64, setup);
JobHandle firstColumn = firstColumnJob.Schedule(totalRays, 4, ddaSetup);
JobHandle render = renderJob.Schedule(totalRays, 1, firstColumn);
render.Complete();
rayContext.Dispose();
segmentContexts.Dispose();
rayDDAContext.Dispose();
rayContinuations.Dispose();
rayBufferTopDownManaged.UploadCompletes();
rayBufferLeftRightManaged.UploadCompletes();
}
