private Mesh GetMesh(int index)
{
SgtHelper.ClearCapacity(positions, 1024);
SgtHelper.ClearCapacity(coords0, 1024);
SgtHelper.ClearCapacity(indices, 1024);
SgtHelper.ClearCapacity(colors, 1024);
SgtHelper.ClearCapacity(normals, 1024);
if (index >= Meshes.Count)
{
var newMesh = SgtHelper.CreateTempMesh("Aurora Mesh (Generated)");
Meshes.Add(newMesh);
return(newMesh);
}
var mesh = Meshes[index];
if (mesh == null)
{
mesh = Meshes[index] = SgtHelper.CreateTempMesh("Aurora Mesh (Generated)");
}
return(mesh);
}
private void WriteIndices(SgtRectL outer, SgtRectL inner, long detail, long size)
{
SgtHelper.ClearCapacity(indices, 1024);
for (var y = outer.minY; y < outer.maxY; y++)
{
for (var x = outer.minX; x < outer.maxX; x++)
{
if (x >= inner.minX && x < inner.maxX && y >= inner.minY && y < inner.maxY)
{
continue;
}
var aX = x; var aY = y;
var bX = x + 1; var bY = y;
var cX = x; var cY = y + 1;
var dX = x + 1; var dY = y + 1;
if (y == outer.minY && y > -detail)
{
if (x % 2 == 0)
{
bX -= 1;
}
else
{
aX -= 1;
}
}
if (y == outer.maxY - 1 && y < detail - 1)
{
if (x % 2 == 0)
{
dX += 1;
}
else
{
cX += 1;
}
}
if (x == outer.minX && x > -detail)
{
if (y % 2 == 0)
{
cY -= 1;
}
else
{
aY -= 1;
}
}
if (x == outer.maxX - 1 && x < detail - 1)
{
if (y % 2 == 0)
{
dY += 1;
}
else
{
bY += 1;
}
}
var a = Wrap(aX, aY, size);
var b = Wrap(bX, bY, size);
var c = Wrap(cX, cY, size);
var d = Wrap(dX, dY, size);
/*
* var posA = positions[a];
* var posB = positions[b];
* var posC = positions[c];
* var posD = positions[d];
*
* var areaA = Area(posA, posB, posC) + Area(posD, posC, posB);
* var areaB = Area(posA, posB, posD) + Area(posD, posC, posA);
*
* if (a < b)
* {
* var t = a;
*
* a = b;
* b = d;
* d = c;
* c = t;
* }*/
indices.Add(a); indices.Add(c); indices.Add(b);
indices.Add(d); indices.Add(b); indices.Add(c);
}
}
}