private bool GenerateSphere(float radius, int splits, CSGModel parentModel, CSGBrush brush, out ControlMesh controlMesh, out Shape shape)
{
if (prevSplits != splits || prevIsHemisphere != IsHemiSphere || splitControlMesh == null || splitShape == null)
{
splitControlMesh = null;
splitShape = null;
BrushFactory.CreateCubeControlMesh(out splitControlMesh, out splitShape, Vector3.one);
var axi = new Vector3[] { MathConstants.upVector3, MathConstants.leftVector3, MathConstants.forwardVector3 };
List<int> intersectedEdges = new List<int>();
float step = 1.0f / (float)(splits + 1);
float offset;
for (int i = 0; i < axi.Length; i++)
{
var normal = axi[i];
offset = 0.5f - step;
while (offset > 0.0f)
{
ControlMeshUtility.CutMesh(splitControlMesh, splitShape, new CSGPlane(-normal, -offset), ref intersectedEdges);
if (i != 0 || !IsHemiSphere)
{
ControlMeshUtility.CutMesh(splitControlMesh, splitShape, new CSGPlane(normal, -offset), ref intersectedEdges);
}
offset -= step;
}
if (i != 0 || !IsHemiSphere)
{
if ((splits & 1) == 1)
ControlMeshUtility.CutMesh(splitControlMesh, splitShape, new CSGPlane(normal, 0), ref intersectedEdges);
}
}
if (IsHemiSphere)
{
var cuttingPlane = new CSGPlane(MathConstants.upVector3, 0);
intersectedEdges.Clear();
if (ControlMeshUtility.CutMesh(splitControlMesh, splitShape, cuttingPlane, ref intersectedEdges))
{
var edge_loop = ControlMeshUtility.FindEdgeLoop(splitControlMesh, ref intersectedEdges);
if (edge_loop != null)
{
if (ControlMeshUtility.SplitEdgeLoop(splitControlMesh, splitShape, edge_loop))
{
Shape foundShape;
ControlMesh foundControlMesh;
ControlMeshUtility.FindAndDetachSeparatePiece(splitControlMesh, splitShape, cuttingPlane, out foundControlMesh, out foundShape);
}
}
}
}
// Spherize the cube
for (int i = 0; i < splitControlMesh.Vertices.Length; i++)
{
Vector3 v = splitControlMesh.Vertices[i] * 2.0f;
float x2 = v.x * v.x;
float y2 = v.y * v.y;
float z2 = v.z * v.z;
Vector3 s;
s.x = v.x * Mathf.Sqrt(1f - (y2 * 0.5f) - (z2 * 0.5f) + ((y2 * z2) / 3.0f));
s.y = v.y * Mathf.Sqrt(1f - (z2 * 0.5f) - (x2 * 0.5f) + ((z2 * x2) / 3.0f));
s.z = v.z * Mathf.Sqrt(1f - (x2 * 0.5f) - (y2 * 0.5f) + ((x2 * y2) / 3.0f));
splitControlMesh.Vertices[i] = s;//(splitControlMesh.Vertices[i] * 0.75f) + (splitControlMesh.Vertices[i].normalized * 0.25f);
}
if (!ControlMeshUtility.Triangulate(null, splitControlMesh, splitShape))
{
Debug.LogWarning("!ControlMeshUtility.IsConvex");
controlMesh = null;
shape = null;
return false;
}
ControlMeshUtility.FixTexGens(splitControlMesh, splitShape);
if (!ControlMeshUtility.IsConvex(splitControlMesh, splitShape))
{
Debug.LogWarning("!ControlMeshUtility.IsConvex");
controlMesh = null;
shape = null;
return false;
}
ControlMeshUtility.UpdateTangents(splitControlMesh, splitShape);
prevSplits = splits;
prevIsHemisphere = IsHemiSphere;
}
if (splitControlMesh == null || splitShape == null || !splitControlMesh.Valid)
{
Debug.LogWarning("splitControlMesh == null || splitShape == null || !splitControlMesh.IsValid");
controlMesh = null;
shape = null;
return false;
}
controlMesh = splitControlMesh.Clone();
shape = splitShape.Clone();
/*
float angle_offset = GeometryUtility.SignedAngle(gridTangent, delta / sphereRadius, buildPlane.normal);
angle_offset -= 90;
angle_offset += sphereOffset;
angle_offset *= Mathf.Deg2Rad;
Vector3 p1 = MathConstants.zeroVector3;
for (int i = 0; i < realSplits; i++)
{
var angle = ((i * Mathf.PI * 2.0f) / (float)realSplits) + angle_offset;
p1.x = (Mathf.Sin(angle) * sphereRadius);
p1.z = (Mathf.Cos(angle) * sphereRadius);
}
*/
for (int i = 0; i < controlMesh.Vertices.Length; i++)
{
var vertex = controlMesh.Vertices[i];
vertex *= radius;
controlMesh.Vertices[i] = vertex;
}
for (int i = 0; i < shape.Surfaces.Length; i++)
{
var plane = shape.Surfaces[i].Plane;
plane.d *= radius;
shape.Surfaces[i].Plane = plane;
}
bool smoothShading = SphereSmoothShading;
if (!sphereSmoothingGroup.HasValue && smoothShading)
{
sphereSmoothingGroup = SurfaceUtility.FindUnusedSmoothingGroupIndex();
}
for (int i = 0; i < shape.TexGenFlags.Length; i++)
{
shape.TexGens[i].SmoothingGroup = smoothShading ? sphereSmoothingGroup.Value : 0;
}
var defaultTexGen = new TexGen();
defaultTexGen.Scale = MathConstants.oneVector3;
//defaultTexGen.Color = Color.white;
var fakeSurface = new Surface();
fakeSurface.TexGenIndex = 0;
var defaultMaterial = CSGSettings.DefaultMaterial;
for (var s = 0; s < shape.Surfaces.Length; s++)
{
var texGenIndex = shape.Surfaces[s].TexGenIndex;
var axis = GeometryUtility.SnapToClosestAxis(shape.Surfaces[s].Plane.normal);
var rotation = Quaternion.FromToRotation(axis, MathConstants.backVector3);
var matrix = Matrix4x4.TRS(MathConstants.zeroVector3, rotation, MathConstants.oneVector3);
SurfaceUtility.AlignTextureSpaces(matrix, false, ref shape.TexGens[texGenIndex], ref shape.TexGenFlags[texGenIndex], ref shape.Surfaces[s]);
shape.TexGens[texGenIndex].RenderMaterial = defaultMaterial;
}
return true;
}
