public void RasterizeTriangle(Vector3 A, Vector3 B, Vector3 C, float voxelSize, int startX, int endX, int startZ, int endZ, Collector3.ShapeCollector volume, sbyte pass, byte area)
{
int minX = Mathf.Clamp(Mathf.RoundToInt(SomeMath.Min(A.x, B.x, C.x) / voxelSize) - 1, startX, endX);
int minZ = Mathf.Clamp(Mathf.RoundToInt(SomeMath.Min(A.z, B.z, C.z) / voxelSize) - 1, startZ, endZ);
int maxX = Mathf.Clamp(Mathf.RoundToInt(SomeMath.Max(A.x, B.x, C.x) / voxelSize) + 1, startX, endX);
int maxZ = Mathf.Clamp(Mathf.RoundToInt(SomeMath.Max(A.z, B.z, C.z) / voxelSize) + 1, startZ, endZ);
if (minX == maxX || minZ == maxZ)
{
return; //if too small return
}
Vector3[] vectorsStart = new Vector3[3] {
A, B, C
};
for (int x = minX; x < maxX; ++x)
{
int vertsInLength1 = ClipPolyToPlane(1f, 0.0f, -x * voxelSize, vectorsStart, 3, ref _polyListXTemp);
if (vertsInLength1 >= 3)
{
int vertsInLength2 = ClipPolyToPlane(-1f, 0.0f, (x + 1) * voxelSize, _polyListXTemp, vertsInLength1, ref _polyListXFinal);
if (vertsInLength2 >= 3)
{
for (int z = minZ; z < maxZ; ++z)
{
int vertsInLength3 = ClipPolyToPlane(0.0f, 1f, -z * voxelSize, _polyListXFinal, vertsInLength2, ref _polyListZTemp);
if (vertsInLength3 >= 3)
{
int vertsInLength4 = ClipPolyToPlane(0.0f, -1f, (z + 1) * voxelSize, _polyListZTemp, vertsInLength3, ref _polyListZFinal);
if (vertsInLength4 >= 3)
{
float min = _polyListZFinal[0].y;
float max = _polyListZFinal[0].y;
for (int index = 1; index < vertsInLength4; ++index)
{
min = Mathf.Min(min, _polyListZFinal[index].y);
max = Mathf.Max(max, _polyListZFinal[index].y);
}
volume.SetVoxel(
Mathf.Abs(x - startX),
Mathf.Abs(z - startZ),
min, max, pass, area);
}
}
}
}
}
}
}
//public void AppendTerrain(CSRasterization2DResult rasterizationResult, TerrainColliderInfoMesh terrainInfo) {
// var voxels = rasterizationResult.voxels;
// for (int x = 0; x < sizeX; x++) {
// for (int z = 0; z < sizeZ; z++) {
// var curVoxel = voxels[x + (z * sizeX)];
// if (curVoxel.exist)
// SetVoxel(x, z, curVoxel.height - 20f, curVoxel.height, (sbyte)curVoxel.passability);
// }
// }
//}
private DataCompact[] GetTerrainCompactData(Vector3[] vrts, int[] trs) {
var compactData = TakeCompactData();
float maxSlopeCos = Mathf.Cos(template.maxSlope * Mathf.PI / 180.0f);
float voxelSize = template.voxelSize;
Vector3 realChunkPos = template.realOffsetedPosition;
float chunkPosX = realChunkPos.x;
float chunkPosZ = realChunkPos.z;
int offsetX = Mathf.RoundToInt(chunkPosX / voxelSize);
int offsetZ = Mathf.RoundToInt(chunkPosZ / voxelSize);
int sizeX = template.lengthX_extra;
int sizeZ = template.lengthZ_extra;
//actual rasterization
for (int i = 0; i < trs.Length; i += 3) {
Vector3 A = vrts[trs[i]];
Vector3 B = vrts[trs[i + 1]];
Vector3 C = vrts[trs[i + 2]];
sbyte passability = CalculateWalk(A, B, C, maxSlopeCos) ? (sbyte)Passability.Walkable : (sbyte)Passability.Slope;//if true then walkable else slope;
int minX = Mathf.Clamp(Mathf.FloorToInt(SomeMath.Min(A.x, B.x, C.x) / voxelSize) - offsetX, 0, sizeX);
int maxX = Mathf.Clamp(Mathf.CeilToInt(SomeMath.Max(A.x, B.x, C.x) / voxelSize) - offsetX, 0, sizeX);
int minZ = Mathf.Clamp(Mathf.FloorToInt(SomeMath.Min(A.z, B.z, C.z) / voxelSize) - offsetZ, 0, sizeZ);
int maxZ = Mathf.Clamp(Mathf.CeilToInt(SomeMath.Max(A.z, B.z, C.z) / voxelSize) - offsetZ, 0, sizeZ);
for (int x = minX; x < maxX; x++) {
for (int z = minZ; z < maxZ; z++) {
float pointX = (x * voxelSize) + chunkPosX;
float pointZ = (z * voxelSize) + chunkPosZ;
if (SomeMath.LineSide(A.x, A.z, B.x, B.z, pointX, pointZ) <= 0.001 &
SomeMath.LineSide(B.x, B.z, C.x, C.z, pointX, pointZ) <= 0.001 &
SomeMath.LineSide(C.x, C.z, A.x, A.z, pointX, pointZ) <= 0.001) {
float height = SomeMath.CalculateHeight(A, B, C, pointX, pointZ);
compactData[GetIndex(x, z)].Update(height - 20, height, passability);
}
}
}
}
return compactData;
}
public CSRasterization2DResult Rasterize(Vector3[] verts, int[] tris, int sizeX, int sizeZ, float chunkPosX, float chunkPosZ, float voxelSize, float maxSlopeCos, bool debug = false)
{
if (tris.Length == 0)
{
return(null);
}
int dsLength = tris.Length / 3;
int dsTargetLength = Mathf.Max(Mathf.CeilToInt((float)dsLength / (float)cellSizeX), 1) * cellSizeX;
DataSegment2D[] ds = new DataSegment2D[dsTargetLength];
int sizeTotal = sizeX * sizeZ;
int offsetX = Mathf.RoundToInt(chunkPosX / voxelSize);
int offsetZ = Mathf.RoundToInt(chunkPosZ / voxelSize);
for (int i = 0; i < tris.Length; i += 3)
{
Vector3 A = verts[tris[i]];
Vector3 B = verts[tris[i + 1]];
Vector3 C = verts[tris[i + 2]];
//making data segments
//data segment represent:
//triangle index
//expected passablity based on inclanation
//min and max indexes in grid to check it presence
ds[i / 3] =
new DataSegment2D(
i,
(CalculateWalk(A, B, C, maxSlopeCos) ? 3 : 1), //if true then walkable else slope;
Mathf.Clamp(Mathf.FloorToInt(SomeMath.Min(A.x, B.x, C.x) / voxelSize) - offsetX, 0, sizeX), //minX
Mathf.Clamp(Mathf.CeilToInt(SomeMath.Max(A.x, B.x, C.x) / voxelSize) - offsetX, 0, sizeX), //maxX
Mathf.Clamp(Mathf.FloorToInt(SomeMath.Min(A.z, B.z, C.z) / voxelSize) - offsetZ, 0, sizeZ), //minZ
Mathf.Clamp(Mathf.CeilToInt(SomeMath.Max(A.z, B.z, C.z) / voxelSize) - offsetZ, 0, sizeZ) //maxZ
);
}
int kernel = CS.FindKernel("Rasterize");
ComputeBuffer vertsBuffer = new ComputeBuffer(verts.Length, sizeof(float) * 3);
ComputeBuffer trisBuffer = new ComputeBuffer(tris.Length, sizeof(int));
ComputeBuffer voxelBuffer = new ComputeBuffer(sizeTotal, Voxel2D.stride);
ComputeBuffer dataSegmentBuffer = new ComputeBuffer(dsTargetLength, DataSegment2D.stride);
CS.SetInt("SizeX", sizeX);
CS.SetInt("SizeZ", sizeZ);
CS.SetVector("ChunkPos", new Vector4(chunkPosX, 0, chunkPosZ, 0));
CS.SetFloat("VoxelSize", voxelSize);
CS.SetBuffer(kernel, "CurTris", trisBuffer);
CS.SetBuffer(kernel, "CurVerts", vertsBuffer);
CS.SetBuffer(kernel, "Result", voxelBuffer);
CS.SetBuffer(kernel, "TargetSegments", dataSegmentBuffer);
vertsBuffer.SetData(verts);
trisBuffer.SetData(tris);
Voxel2D[] voxels = new Voxel2D[sizeTotal];
for (int i = 0; i < sizeTotal; i++)
{
voxels[i].passability = -1;
}
voxelBuffer.SetData(voxels);
dataSegmentBuffer.SetData(ds);
CS.Dispatch(kernel, dsTargetLength / cellSizeX, 1, 1);
voxelBuffer.GetData(voxels);
CSRasterization2DResult result = new CSRasterization2DResult(voxels);
//debug
#if UNITY_EDITOR
if (debug)
{
Debuger_K.AddMesh(verts, tris, new Color(1, 0, 1, 0.1f));
//implementation of things goint on in compute shader
foreach (var dataSet in ds)
{
Vector3 A = verts[tris[dataSet.index]];
Vector3 B = verts[tris[dataSet.index + 1]];
Vector3 C = verts[tris[dataSet.index + 2]];
for (int x = dataSet.minX; x < dataSet.maxX; x++)
{
for (int z = dataSet.minZ; z < dataSet.maxZ; z++)
{
float pointX = (x * voxelSize) + chunkPosX;
float pointZ = (z * voxelSize) + chunkPosZ;
//if (SomeMath.LineSide(B.x, B.z, A.x, A.z, pointX, pointZ) <= 0.001 &
// SomeMath.LineSide(A.x, A.z, C.x, C.z, pointX, pointZ) <= 0.001 &
// SomeMath.LineSide(C.x, C.z, B.x, B.z, pointX, pointZ) <= 0.001) {
// float height = SomeMath.CalculateHeight(A, B, C, pointX, pointZ);
// Debuger_K.AddDot(new Vector3((x * voxelSize) + chunkPosX, height, (z * voxelSize) + chunkPosZ));
// Debuger_K.AddLine(A, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.green);
// Debuger_K.AddLine(B, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.green);
// Debuger_K.AddLine(C, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.green);
//}
//else {
// Debuger_K.AddLine(A, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.red);
// Debuger_K.AddLine(B, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.red);
// Debuger_K.AddLine(C, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.red);
//}
if (SomeMath.PointInTriangleSimple(A, B, C, pointX, pointZ))
{
float height = SomeMath.CalculateHeight(A, B, C, pointX, pointZ);
Debuger_K.AddDot(new Vector3((x * voxelSize) + chunkPosX, height, (z * voxelSize) + chunkPosZ));
//Debuger_K.AddLine(A, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.green);
//Debuger_K.AddLine(B, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.green);
//Debuger_K.AddLine(C, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.green);
}
else
{
//Debuger_K.AddLine(A, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.red);
//Debuger_K.AddLine(B, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.red);
//Debuger_K.AddLine(C, new Vector3((x * voxelSize) + chunkPosX, 0, (z * voxelSize) + chunkPosZ), Color.red);
}
}
}
}
//for (int x = 0; x < sizeX; x++) {
// for (int z = 0; z < sizeZ; z++) {
// var curVoxel = voxels[x + (z * sizeX)];
// if (curVoxel.exist) {
// Debuger_K.AddDot(new Vector3((x * voxelSize) + chunkPosX, curVoxel.height, (z * voxelSize) + chunkPosZ));
// }
// }
//}
}
#endif
vertsBuffer.Dispose();
trisBuffer.Dispose();
voxelBuffer.Dispose();
dataSegmentBuffer.Dispose();
return(result);
}