// Return a new CSG solid representing space in either this solid or in the
// solid `csg`. Neither this solid nor the solid `csg` are modified.
//
// +-------+ +-------+
// | | | |
// | A | | |
// | +--+----+ = | +----+
// +----+--+ | +----+ |
// | B | | |
// | | | |
// +-------+ +-------+
//
public static Mesh Union(Mesh a1, Mesh b1)
{
CsgAcceleratedMesh a = new CsgAcceleratedMesh(a1);
CsgAcceleratedMesh b = new CsgAcceleratedMesh(b1);
a.SplitOnAllEdgeIntersections(b);
b.SplitOnAllEdgeIntersections(a);
a.MarkInternalVertices(b);
b.MarkInternalVertices(a);
a.RemoveAllInternalEdges();
b.RemoveAllInternalEdges();
a.MergeWith(b);
return a.mesh;
}
// Return a new CSG solid representing space in either this solid or in the
// solid `csg`. Neither this solid nor the solid `csg` are modified.
//
// +-------+ +-------+
// | | | |
// | A | | |
// | +--+----+ = | +----+
// +----+--+ | +----+ |
// | B | | |
// | | | |
// +-------+ +-------+
//
public static Mesh Union(Mesh a1, Mesh b1)
{
CsgAcceleratedMesh a = new CsgAcceleratedMesh(a1);
CsgAcceleratedMesh b = new CsgAcceleratedMesh(b1);
a.SplitOnAllEdgeIntersections(b);
b.SplitOnAllEdgeIntersections(a);
a.MarkInternalVertices(b);
b.MarkInternalVertices(a);
a.RemoveAllInternalEdges();
b.RemoveAllInternalEdges();
a.MergeWith(b);
return(a.mesh);
}
public void SplitOnAllEdgeIntersections(CsgAcceleratedMesh meshWidthEdges)
{
AxisAlignedBoundingBox boundsForFaces = this.mesh.GetAxisAlignedBoundingBox();
AxisAlignedBoundingBox boundsForEdges = meshWidthEdges.mesh.GetAxisAlignedBoundingBox();
AxisAlignedBoundingBox faceEdgeBoundsIntersection = AxisAlignedBoundingBox.Intersection(boundsForEdges, boundsForFaces);
foreach (var meshEdge in meshWidthEdges.GetMeshEdgesTouching(faceEdgeBoundsIntersection))
{
// Check the mesh edge bounds agains all polygons. If there is an intersection
// subdivide the mesh edge and if the face that is hit. If hit face on an edge only split the edge.
Vector3 end0 = meshEdge.VertexOnEnd[0].Position;
Vector3 end1 = meshEdge.VertexOnEnd[1].Position;
Ray ray = new Ray(end0, (end1 - end0).GetNormal());
AxisAlignedBoundingBox edgeBounds = new AxisAlignedBoundingBox(Vector3.ComponentMin(end0, end1), Vector3.ComponentMax(end0, end1));
foreach (Face face in GetFacesTouching(edgeBounds))
{
Vector3 intersectionPosition;
// intersect the face with the edge
switch (face.Intersection(ray, out intersectionPosition))
{
case FaceHelper.IntersectionType.Vertex:
break;
case FaceHelper.IntersectionType.MeshEdge:
{
SplitMeshEdge(meshEdge, intersectionPosition);
// split the face at intersectionPosition
SplitMeshEdgeAtPosition(face, intersectionPosition);
}
break;
case FaceHelper.IntersectionType.Face:
{
SplitMeshEdge(meshEdge, intersectionPosition);
// split the face at intersectionPosition
SplitFaceAtPosition(face, intersectionPosition);
}
break;
}
}
}
}
public void SplitOnAllEdgeIntersections(CsgAcceleratedMesh meshWidthEdges)
{
foreach (var meshEdge in meshWidthEdges.mesh.MeshEdges)
{
// Check the mesh edge bounds agains all polygons. If there is an intersection
// subdivide the mesh edge and if the face that is hit. If hit face on an edge only split the edge.
Vector3 end0 = meshEdge.VertexOnEnd[0].Position;
Vector3 end1 = meshEdge.VertexOnEnd[1].Position;
AxisAlignedBoundingBox edgeBounds = new AxisAlignedBoundingBox(Vector3.ComponentMin(end0, end1), Vector3.ComponentMax(end0, end1));
foreach (Face face in GetFacesTouching(edgeBounds))
{
Vector3 intersectionPosition;
// intersect the face with the edge
switch (face.Intersection(end0, end1, out intersectionPosition))
{
case FaceHelper.IntersectionType.Vertex:
break;
case FaceHelper.IntersectionType.MeshEdge:
{
SplitMeshEdgeIfRequired(meshEdge, intersectionPosition);
// split the face at intersectionPosition
SplitMeshEdgeAtPosition(face, intersectionPosition);
}
break;
case FaceHelper.IntersectionType.Face:
{
SplitMeshEdgeIfRequired(meshEdge, intersectionPosition);
// split the face at intersectionPosition
SplitFaceAtPosition(face, intersectionPosition);
}
break;
}
}
}
}
internal void MergeWith(CsgAcceleratedMesh b)
{
throw new NotImplementedException();
}
internal void MarkInternalVertices(CsgAcceleratedMesh b)
{
throw new NotImplementedException();
}
internal void MergeWith(CsgAcceleratedMesh b)
{
throw new NotImplementedException();
}
internal void MarkInternalVertices(CsgAcceleratedMesh b)
{
throw new NotImplementedException();
}
