public override Geometry Execute(Geometry geometry)
{
int vertexOffset = geometry.vertices.Count;
for (int i = 0; i < CTesselation; ++i)
{
int pointsCount = i == 0 ? 1 : RTesselation;
//generate circle
for (int j = 0; j < pointsCount; ++j)
{
float angle = 360.0f / RTesselation * j;
float rCircle = Radius / (CTesselation - 1) * i;
float x = Mathf.Sin(angle * Mathf.Deg2Rad) * rCircle;
float z = Mathf.Cos(angle * Mathf.Deg2Rad) * rCircle;
float y = (SphereUtils.SphereCenterOffset(CapRadius, rCircle) - SphereUtils.SphereCenterOffset(CapRadius, Radius)) * Mathf.Sign(CapRadius);
geometry.vertices.Add(new Vector3(x, y, z));
geometry.normals.Add(Vector3.up);
}
}
//indices
for (int i = 0; i < CTesselation - 1; ++i)
{
if (i == 0)
{
for (int j = 0; j < RTesselation; ++j)
{
geometry.indices.Add(0 + vertexOffset);
geometry.indices.Add(j + 1 + vertexOffset);
geometry.indices.Add((j + 1) % RTesselation + 1 + vertexOffset);
}
vertexOffset += 1;
}
else
{
for (int j = 0; j < RTesselation; ++j)
{
int a0 = RTesselation * (i - 1) + j;
int a1 = RTesselation * (i - 1) + (j + 1) % RTesselation;
int b0 = RTesselation * (i - 0) + j;
int b1 = RTesselation * (i - 0) + (j + 1) % RTesselation;
geometry.indices.Add(a0 + vertexOffset);
geometry.indices.Add(b0 + vertexOffset);
geometry.indices.Add(a1 + vertexOffset);
geometry.indices.Add(b0 + vertexOffset);
geometry.indices.Add(b1 + vertexOffset);
geometry.indices.Add(a1 + vertexOffset);
}
}
}
return(geometry);
}
