public void Execute(int index)
{
var numDecals = NumDecalsPerRoad[index];
if (numDecals == 0)
{
return;
}
var random = RandomUtility.ParallelForRandom(RandomSeed, index);
var roadEntity = RoadEntities[index];
var sampleBuffer = RoadSampleBuffers[roadEntity].Reinterpret <RigidTransform>().AsNativeArray();
var startIndex = DecalStartIndices[index];
var decalPositions = DecalPoses.GetSubArray(startIndex, numDecals);
var decalTrackDistances = new NativeArray <float>(numDecals, Allocator.Temp);
var distancePerDecal = SplineUtility.SplineLength(sampleBuffer) / (numDecals);
// Offset the decals by a third instead of a half of the separation dist to decrease the chances of
// overlapping decals being generated.
var thirdDistPerDecal = distancePerDecal / 3f;
var currDist = distancePerDecal / 2f;
for (var i = 0; i < numDecals; i++)
{
decalTrackDistances[i] = currDist + random.NextFloat(-thirdDistPerDecal, thirdDistPerDecal);
currDist += distancePerDecal;
}
var remappedSpline =
SplineUtility.SampleSplineAtDistances(sampleBuffer, decalTrackDistances, Allocator.Temp);
var lateralProfile = Profiles[ProfileBuffers[roadEntity].Reinterpret <Entity>()[0]];
var minLateralRange = lateralProfile.LeftDrivableOffset.x;
var maxLateralRange = lateralProfile.RightDrivableOffset.x;
minLateralRange = math.clamp(minLateralRange, minLateralRange + 1, 0);
maxLateralRange = math.clamp(maxLateralRange, 0, maxLateralRange - 1);
for (var i = 0; i < remappedSpline.Length; i++)
{
var pose = remappedSpline[i];
var randOffset = random.NextFloat(minLateralRange, maxLateralRange);
var randRotation = quaternion.RotateY(random.NextFloat(0, math.PI * 2f));
var offset = new float3(randOffset, 0f, 0f);
decalPositions[i] = new RigidTransform
{
pos = math.transform(pose, offset),
rot = math.mul(pose.rot, randRotation)
};
}
remappedSpline.Dispose();
}