public unsafe void Execute(int index)
{
RayDDAContext rayContext = inRays[index];
SegmentContext *segmentContext = rayContext.segment;
// TODO change the DDA ray setup so that we can do an intersection test with the world to find the first position instead of stepping to it
RayContinuation cont = new RayContinuation
{
segment = rayContext.segment,
ddaRay = rayContext.ddaRay,
planeRayIndex = rayContext.planeRayIndex,
rayColumn = segmentContext->activeRayBufferFull.GetRayColumn(rayContext.planeRayIndex + segmentContext->segmentRayIndexOffset),
lod = 0,
};
World *world = drawContext.worldLODs;
float farClip = drawContext.camera.FarClip;
float lodMax = drawContext.camera.LODDistances[0];
if (!World.REPEAT_WORLD)
{
// with a non-repeating world, we want to start inside the first grid position that is inside of the world
// this means we can simply stop the ray later on if it runs outside of the world
// (plus we know there's possible a lot of air out there)
int2 dimensions = world->Dimensions.xz;
int2 startPos = cont.ddaRay.Position;
if (any(startPos < 0 | startPos >= dimensions))
{
// so the start is outside of the limited world
if (cont.ddaRay.StepToWorldIntersection(dimensions))
{
while (cont.ddaRay.IntersectionDistances.x >= lodMax)
{
cont.ddaRay.NextLOD(1 << cont.lod);
cont.lod++;
world++;
lodMax = drawContext.camera.LODDistances[cont.lod];
}
if (cont.ddaRay.IsBeyondFarClip(farClip))
{
WriteSkyboxFull(segmentContext->originalNextFreePixelMin, segmentContext->originalNextFreePixelMax, cont.rayColumn);
}
else
{
outRays.AddNoResize(cont);
}
}
else
{
WriteSkyboxFull(segmentContext->originalNextFreePixelMin, segmentContext->originalNextFreePixelMax, cont.rayColumn);
}
return;
}
}
outRays.AddNoResize(cont);
}
public unsafe void Execute(int i)
{
float endRayLerp = raysInput[i].planeRayIndex / (float)raysInput[i].context->segment.RayCount;
float2 camLocalPlaneRayDirection = lerp(
raysInput[i].context->segment.CamLocalPlaneRayMin,
raysInput[i].context->segment.CamLocalPlaneRayMax,
endRayLerp
);
SegmentDDAData ray = new SegmentDDAData(
drawContext.camera.PositionXZ,
normalize(camLocalPlaneRayDirection)
);
raysOutput[i] = new RayDDAContext
{
segment = raysInput[i].context,
planeRayIndex = raysInput[i].planeRayIndex,
ddaRay = ray
};
}
