public static RenderGeometry CreateSphereGeometry(float radius, int segmentP, int segmentH, bool smoothH, bool smoothV, float cutTop = 0, float cutBottom = 0)
{
if (cutTop + cutBottom > 1)
{
return(new RenderGeometry());
}
RenderGeometry.FaceType faceType = GetFaceType(smoothH, smoothV);
StructureGeometry structure = new StructureGeometry();
SurfaceComponentGeometry upperPart, lowerPart, middlePart;
if (cutTop != 0)
{
upperPart = SurfaceComponentGeometries.CreateRegularPolygonGeometry(radius * Mathf.Sqrt(4 * cutTop * (1 - cutTop)), segmentP, 2);
upperPart.ApplyOffset(radius * (1 - 2 * cutTop) * Vector3.up);
}
else
{
float angle = cutBottom != 0 ? Mathf.Acos(-1 + cutBottom * 2) : Mathf.PI * (segmentH / 2) / segmentH;
upperPart = SurfaceComponentGeometries.CreateSphereCapGeometry(radius, segmentP, cutBottom != 0 ? segmentH : segmentH / 2, 2 * angle, 0, 1, faceType);
}
if (cutBottom != 0)
{
lowerPart = SurfaceComponentGeometries.CreateRegularPolygonGeometry(radius * Mathf.Sqrt(4 * cutBottom * (1 - cutBottom)), segmentP, 2);
lowerPart.ApplyOffset(radius * (1 - 2 * cutBottom) * Vector3.up);
lowerPart.ApplyRotation(Quaternion.AngleAxis(180, Vector3.right));
}
else
{
float angle = cutTop != 0 ? Mathf.Acos(-1 + cutTop * 2) : Mathf.PI * ((segmentH + 1) / 2) / segmentH;
lowerPart = SurfaceComponentGeometries.CreateSphereCapGeometry(radius, segmentP, cutTop != 0 ? segmentH : (segmentH + 1) / 2, 2 * angle, 0, 1, faceType);
lowerPart.ApplyRotation(Quaternion.AngleAxis(180, Vector3.right));
}
if (cutTop != 0 && cutBottom != 0)
{
float angle1 = Mathf.Acos(1 - cutTop * 2);
float angle2 = Mathf.Acos(-1 + cutBottom * 2);
middlePart = SurfaceComponentGeometries.CreateSphereSideGeometry(radius, angle1, angle2, segmentP, segmentH, 0, 1, faceType);
Vertex cornerUp = structure.CreateVertex();
Vertex cornerDown = structure.CreateVertex();
structure.CreateFace(middlePart, false, cornerUp, cornerUp, cornerDown, cornerDown);
structure.CreateFace(upperPart, false, cornerUp);
structure.CreateFace(lowerPart, false, cornerDown);
}
else
{
Vertex corner = structure.CreateVertex();
structure.CreateFace(upperPart, false, corner);
structure.CreateFace(lowerPart, false, corner);
}
return(structure.Build());
}