public static CSG sphere(Vector3 center, float radius = 1, float slices = 16f, float stacks = 8f)
{
float r = radius;
List <Polygon> polygons = new List <Polygon>();
List <IVertex> vertices;
for (int i = 0; i < slices; i++)
{
for (int j = 0; j < stacks; j++)
{
vertices = new List <IVertex>();
makeSphereVertex(ref vertices, center, r, i / slices, j / stacks);
if (j > 0)
{
makeSphereVertex(ref vertices, center, r, (i + 1) / slices, j / stacks);
}
if (j < stacks - 1)
{
makeSphereVertex(ref vertices, center, r, (i + 1) / slices, (j + 1) / stacks);
}
makeSphereVertex(ref vertices, center, r, i / slices, (j + 1) / stacks);
polygons.Add(new Polygon(vertices));
}
}
return(CSG.fromPolygons(polygons));
}
/// <summary>
/// Cube function, Untested but compiles
/// </summary>
/// <param name="center">world space center of the cube</param>
/// <param name="radius">size of the cube created at center</param>
/// <returns></returns>
public static CSG cube(Vector3?center, Vector3?radius)
{
Vector3 c = center.GetValueOrDefault(Vector3.zero);
Vector3 r = radius.GetValueOrDefault(Vector3.one);
//TODO: Test if this works
Polygon[] polygons = new Polygon[6];
int[][][] data = new int[][][] {
new int[][] { new int[] { 0, 4, 6, 2 }, new int[] { -1, 0, 0 } },
new int[][] { new int[] { 1, 3, 7, 5 }, new int[] { 1, 0, 0 } },
new int[][] { new int[] { 0, 1, 5, 4 }, new int[] { 0, -1, 0 } },
new int[][] { new int[] { 2, 6, 7, 3 }, new int[] { 0, 1, 0 } },
new int[][] { new int[] { 0, 2, 3, 1 }, new int[] { 0, 0, -1 } },
new int[][] { new int[] { 4, 5, 7, 6 }, new int[] { 0, 0, 1 } }
};
for (int x = 0; x < 6; x++)
{
int[][] v = data[x];
Vector3 normal = new Vector3((float)v[1][0], (float)v[1][1], (float)v[1][2]);
IVertex[] verts = new IVertex[4];
for (int i = 0; i < 4; i++)
{
verts[i] = new Vertex(
new Vector3(
c.x + (r.x * (2 * (((v[0][i] & 1) > 0) ? 1 : 0) - 1)),
c.y + (r.y * (2 * (((v[0][i] & 2) > 0) ? 1 : 0) - 1)),
c.z + (r.z * (2 * (((v[0][i] & 4) > 0) ? 1 : 0) - 1))),
normal
);
}
polygons[x] = new Polygon(verts);
}
return(CSG.fromPolygons(polygons));
}
/// <summary>
/// Create CSG from array, does not clone the polygons
/// </summary>
/// <param name="polygon"></param>
/// <returns></returns>
private static CSG fromPolygons(Polygon[] polygons)
{
//TODO: Optimize polygons to share vertices
CSG csg = new CSG();
csg.polygons.AddRange(polygons);
return(csg);
}
/// <summary>
/// Clone
/// </summary>
/// <returns></returns>
public CSG clone()
{
CSG csg = new CSG();
foreach (Polygon p in this.polygons)
{
csg.polygons.Add(p.clone());
}
return csg;
}
public CSG inverse()
{
CSG csg = this.clone();
foreach (Polygon p in csg.polygons)
{
p.flip();
}
return(csg);
}
/// <summary>
/// Clone
/// </summary>
/// <returns></returns>
public CSG clone()
{
CSG csg = new CSG();
foreach (Polygon p in this.polygons)
{
csg.polygons.Add(p.clone());
}
return(csg);
}
/// <summary>
/// Construct a CSG solid from a list of `Polygon` instances.
/// The polygons are cloned
/// </summary>
/// <param name="polygons"></param>
/// <returns></returns>
public static CSG fromPolygons(List <Polygon> polygons)
{
//TODO: Optimize polygons to share vertices
CSG csg = new CSG();
foreach (Polygon p in polygons)
{
csg.polygons.Add(p.clone());
}
return(csg);
}
/// <summary>
/// Return a new CSG solid representing space both this solid and in the
/// solid `csg`. Neither this solid nor the solid `csg` are modified.
/// </summary>
/// <remarks>
/// A.intersect(B)
///
/// +-------+
/// | |
/// | A |
/// | +--+----+ = +--+
/// +----+--+ | +--+
/// | B |
/// | |
/// +-------+
/// </remarks>
/// <param name="csg"></param>
/// <returns>CSG of the intersection</returns>
public CSG intersect(CSG csg)
{
Node a = new Node(this.polygons);
Node b = new Node(csg.polygons);
a.invert();
b.invert();
a.clipTo(b);
b.clipTo(a);
a.build(b.allPolygons());
return(CSG.fromPolygons(a.allPolygons()).inverse());
}
public static CSG fromMesh(Mesh m, Transform tf)
{
List <Polygon> triangles = new List <Polygon>();
int[] tris = m.triangles;
for (int t = 0; t < tris.Length; t += 3)
{
Vertex[] vs = new Vertex[3];
vs[0] = TranslateVertex(m, tf, tris[t]);
vs[1] = TranslateVertex(m, tf, tris[t + 1]);
vs[2] = TranslateVertex(m, tf, tris[t + 2]);
//Debug.Log("Tri index: " + (t+i).ToString() + ", Vertex: " + vs[i].pos);
triangles.Add(new Polygon(vs));
}
return(CSG.fromPolygons(triangles));
}
/// <summary>
/// Return a new CSG solid representing space in this solid but not in the
/// solid `csg`. Neither this solid nor the solid `csg` are modified.
/// </summary>
/// <remarks>
/// A.subtract(B)
/// +-------+ +-------+
/// | | | |
/// | A | | |
/// | +--+----+ = | +--+
/// +----+--+ | +----+
/// | B |
/// | |
/// +-------+
/// </remarks>
/// <param name="csg"></param>
/// <returns></returns>
public CSG subtract(CSG csg)
{
Node a = new Node(this.polygons);
Node b = new Node(csg.polygons);
//Debug.Log(this.clone().polygons.Count + " -- " + csg.clone().polygons.Count);
//Debug.Log("CSG.subtract: Node a = " + a.polygons.Count + " polys, Node b = " + b.polygons.Count + " polys.");
a.invert();
a.clipTo(b);
b.clipTo(a);
b.invert();
b.clipTo(a);
b.invert();
a.build(b.allPolygons());
a.invert();
return(CSG.fromPolygons(a.allPolygons()));
}
/// <summary>
/// Return a new CSG solid representing space both this solid and in the
/// solid `csg`. Neither this solid nor the solid `csg` are modified.
/// </summary>
/// <remarks>
/// A.intersect(B)
///
/// +-------+
/// | |
/// | A |
/// | +--+----+ = +--+
/// +----+--+ | +--+
/// | B |
/// | |
/// +-------+
/// </remarks>
/// <param name="csg"></param>
/// <returns>CSG of the intersection</returns>
public CSG intersect(CSG csg)
{
Node a = new Node(this.polygons);
Node b = new Node(csg.polygons);
a.invert();
//Debug.Log("Intersect 1 polygons: " + a.polygons.Count);
b.invert();
//Debug.Log("Intersect 2 polygons: " + b.polygons.Count);
a.clipTo(b);
//Debug.Log("Intersect 3 polygons: " + a.polygons.Count);
b.clipTo(a);
//Debug.Log("Intersect 5 polygons: " + b.polygons.Count);
a.build(b.allPolygons());
//Debug.Log("Intersect 6 polygons: " + a.polygons.Count);
//Debug.Log("Intersect 7 all polygons: " + a.allPolygons().Count);
//Debug.Log("Intersect 8 polygons finalll cgs: " + CSG.fromPolygons(a.allPolygons()).inverse().polygons.Count);
return(CSG.fromPolygons(a.allPolygons()).inverse());
}
public CSG subtract(GameObject targetGo, GameObject brushGo)
{
Model.submeshIndices = new List <List <int> >();
Model csg_model_a = new Model(targetGo.gameObject, false, false);
Model csg_model_b = new Model(brushGo.gameObject, true, false);
Node a = new Node(csg_model_a.ToPolygons());
Node b = new Node(csg_model_b.ToPolygons());
//Debug.Log(this.clone().polygons.Count + " -- " + csg.clone().polygons.Count);
//Debug.Log("CSG.subtract: Node a = " + a.polygons.Count + " polys, Node b = " + b.polygons.Count + " polys.");
a.invert();
a.clipTo(b);
b.clipTo(a);
b.invert();
b.clipTo(a);
b.invert();
a.build(b.allPolygons());
a.invert();
return(CSG.fromPolygons(a.allPolygons()));
}
/// <summary>
/// Create CSG from array, does not clone the polygons
/// </summary>
/// <param name="polygon"></param>
/// <returns></returns>
private static CSG fromPolygons(Polygon[] polygons)
{
//TODO: Optimize polygons to share vertices
CSG csg = new CSG();
csg.polygons.AddRange(polygons);
return csg;
}
/// <summary>
/// Construct a CSG solid from a list of `Polygon` instances.
/// The polygons are cloned
/// </summary>
/// <param name="polygons"></param>
/// <returns></returns>
public static CSG fromPolygons(List<Polygon> polygons)
{
//TODO: Optimize polygons to share vertices
CSG csg = new CSG();
foreach (Polygon p in polygons)
{
csg.polygons.Add(p.clone());
}
return csg;
}
/// <summary>
/// Return a new CSG solid representing space both this solid and in the
/// solid `csg`. Neither this solid nor the solid `csg` are modified.
/// </summary>
/// <remarks>
/// A.intersect(B)
///
/// +-------+
/// | |
/// | A |
/// | +--+----+ = +--+
/// +----+--+ | +--+
/// | B |
/// | |
/// +-------+
/// </remarks>
/// <param name="csg"></param>
/// <returns>CSG of the intersection</returns>
public CSG intersect(CSG csg)
{
Node a = new Node(this.polygons);
Node b = new Node(csg.polygons);
a.invert();
b.invert();
a.clipTo(b);
b.clipTo(a);
a.build(b.allPolygons());
return CSG.fromPolygons(a.allPolygons()).inverse();
}
/// <summary>
/// Return a new CSG solid representing space in this solid but not in the
/// solid `csg`. Neither this solid nor the solid `csg` are modified.
/// </summary>
/// <remarks>
/// A.subtract(B)
/// +-------+ +-------+
/// | | | |
/// | A | | |
/// | +--+----+ = | +--+
/// +----+--+ | +----+
/// | B |
/// | |
/// +-------+
/// </remarks>
/// <param name="csg"></param>
/// <returns></returns>
public CSG subtract(CSG csg)
{
Node a = new Node(this.polygons);
Node b = new Node(csg.polygons);
//Debug.Log(this.clone().polygons.Count + " -- " + csg.clone().polygons.Count);
//Debug.Log("CSG.subtract: Node a = " + a.polygons.Count + " polys, Node b = " + b.polygons.Count + " polys.");
a.invert();
a.clipTo(b);
b.clipTo(a);
b.invert();
b.clipTo(a);
b.invert();
a.build(b.allPolygons());
a.invert();
return CSG.fromPolygons(a.allPolygons());
}