private void GenerateGrid(Range left, Range bottom, int vertexIndex, byte connectedDirection)
{
int c0, c1, c2, c3;
int width = cellResolution + 1;
int rowOffset = left.IsValid ? width - 1 : width;
int colOffset = left.IsValid ? -1 : 0;
for (int y = 0; y < cellResolution; ++y)
{
for (int x = 0; x < cellResolution; ++x)
{
// corner
c0 = vertexIndex;
// above
c1 = c0 + rowOffset;
// right
c2 = c0 + 1;
// diagonal corner
c3 = c0 + rowOffset + 1;
if (x == 0 && y == 0 && bottom.IsValid && left.IsValid)
{
c0 = bottom.At(0, borderIndices);
c1 = left.At(1, borderIndices);
c2 = bottom.At(1, borderIndices);
c3 = vertexIndex;
}
else if (y == 0 && bottom.IsValid)
{
c0 = bottom.At(x, borderIndices);
c1 = vertexIndex + x + colOffset;
c2 = bottom.At(x + 1, borderIndices);
c3 = vertexIndex + x + 1 + colOffset;
}
else if (x == 0 && left.IsValid)
{
c0 = left.At(y, borderIndices);
c1 = left.At(y + 1, borderIndices);
c2 = vertexIndex;
c3 = vertexIndex + cellResolution;
}
else
{
++vertexIndex;
}
SetHeightLerpValues(c0, c1, c2, c3, connectedDirection, x, y, cellResolution);
}
// right side vertex
if (y > 0 || !bottom.IsValid)
{
++vertexIndex;
}
}
}
private void GenerateGrid(int3 coord, Range left, Range bottom, Range right, Range top, int vertexIndex, int triangleIndex)
{
float startX = coord.x * cellSize.x;
float startY = (coord.y + 1f) * cellSize.y;
float startZ = coord.z * cellSize.z;
float startU = coord.x;
float startV = coord.z;
float3 v = new float3 {
x = startX, y = startY, z = startZ
};
float2 uv = new float2 {
x = startU, y = startV
};
int c0, c1, c2, c3;
int width = cellResolution + 1;
int rowOffset = left.IsValid ? width - 1 : width;
int colOffset = left.IsValid ? -1 : 0;
for (int y = 0; y < cellResolution; ++y)
{
v.x = startX;
uv.x = startU;
for (int x = 0; x < cellResolution; ++x)
{
// corner
c0 = vertexIndex;
// above
c1 = c0 + rowOffset;
// right
c2 = c0 + 1;
// diagonal corner
c3 = c0 + rowOffset + 1;
if (x == 0 && y == 0 && bottom.IsValid && left.IsValid)
{
c0 = bottom.At(0, borderIndices);
c1 = left.At(1, borderIndices);
c2 = bottom.At(1, borderIndices);
c3 = vertexIndex;
}
else if (y == 0 && bottom.IsValid)
{
c0 = bottom.At(x, borderIndices);
c1 = vertexIndex + x + colOffset;
c2 = bottom.At(x + 1, borderIndices);
c3 = vertexIndex + x + 1 + colOffset;
}
else if (x == 0 && left.IsValid)
{
c0 = left.At(y, borderIndices);
c1 = left.At(y + 1, borderIndices);
c2 = vertexIndex;
c3 = vertexIndex + cellResolution;
}
else
{
Add(v, uv, vertexIndex);
++vertexIndex;
}
AddTris(c0, c1, c2, c3, triangleIndex);
triangleIndex += 6;
v.x += stepX;
uv.x += stepU;
}
// right side vertex
if (y > 0 || !bottom.IsValid)
{
Add(v, uv, vertexIndex);
++vertexIndex;
}
v.z += stepZ;
uv.y += stepV;
}
// top row vertices
v.x = startX;
uv.x = startU;
for (int i = 0; i < width; ++i)
{
if (i > 0 || !left.IsValid)
{
Add(v, uv, vertexIndex);
++vertexIndex;
}
v.x += stepX;
uv.x += stepU;
}
}