internal SurfaceType GetSurfaceTypeByTriangle(int triangleIndex)
{
if (_mesh == null)
{
return(SurfaceType.Generic);
}
if (surfaceTypes.Length == 1)
{
return(surfaceTypes[0]);
}
//Get the sub mesh index of the supplied triangle index and find the surface type associated with it
int subMeshIndex = MeshHelper.GetSubMeshIndexByTriangle(triangleIndex, _mesh.subMeshCount, _meshSubMeshTriangleRanges);
return(subMeshIndex >= surfaceTypes.Length ? SurfaceType.Generic : surfaceTypes[subMeshIndex]);
}
internal void Project()
{
Initialize();
if (_meshFilter.sharedMesh != null)
{
return;
}
this.transform.localScale = Vector3.one * _scale;
// Randomly rotate the decal before projection
this.transform.eulerAngles += new Vector3(180, 0, Random.Range(0f, 360f));
RaycastHit raycastHit;
bool hit = Physics.Raycast(this.transform.position, this.transform.forward, out raycastHit, _scale);
if (!hit)
{
Destroy(this.gameObject);
return;
}
else if (raycastHit.collider.gameObject.GetComponent <Rigidbody>() != null)
{
Destroy(this.gameObject);
return;
}
else if (raycastHit.collider.gameObject.layer != Globals.STRUCTURE_LAYER)
{
Destroy(this.gameObject);
return;
}
UnityEngine.Mesh surfaceMesh = MeshHelper.GetObjectMesh(raycastHit.collider.gameObject);
if (surfaceMesh == null)
{
Destroy(this.gameObject);
return;
}
BooleanMesh(surfaceMesh, raycastHit);
}
private void Initialize()
{
_mesh = MeshHelper.GetObjectMesh(this.gameObject);
_meshSubMeshTriangleRanges = MeshHelper.GetMeshSubMeshTriangleRanges(_mesh);
}
private void BooleanMesh(UnityEngine.Mesh surfaceMesh, RaycastHit raycastHit)
{
// Define the surfaces vertices and triangles
Vector3[] vertices = surfaceMesh.vertices;
int[] triangles = surfaceMesh.triangles;
int startTriangle = 0;
int endTriangle = triangles.Length;
if (_onlyBooleanHitSubMesh)
{
int[] subMeshRanges = MeshHelper.GetMeshSubMeshTriangleRanges(surfaceMesh);
int subMeshIndex = MeshHelper.GetSubMeshIndexByTriangle(raycastHit.triangleIndex, surfaceMesh.subMeshCount, subMeshRanges);
MeshHelper.GetSubMeshRange(subMeshRanges, subMeshIndex, out startTriangle, out endTriangle);
}
// Define clipping planes
Plane right = new Plane(Vector3.right, Vector3.right / 2f);
Plane left = new Plane(-Vector3.right, -Vector3.right / 2f);
Plane top = new Plane(Vector3.up, Vector3.up / 2f);
Plane bottom = new Plane(-Vector3.up, -Vector3.up / 2f);
Plane front = new Plane(Vector3.forward, Vector3.forward / 2f);
Plane back = new Plane(-Vector3.forward, -Vector3.forward / 2f);
// Define vertex matrix
Matrix4x4 matrix = this.transform.worldToLocalMatrix * raycastHit.collider.transform.localToWorldMatrix;
for (int i = startTriangle; i < endTriangle; i += 3)
{
// Define indices
int indice0 = triangles[i];
int indice1 = triangles[i + 1];
int indice2 = triangles[i + 2];
// Define and offset verts to world space
Vector3 vertice0 = matrix.MultiplyPoint(vertices[indice0]);
Vector3 vertice1 = matrix.MultiplyPoint(vertices[indice1]);
Vector3 vertice2 = matrix.MultiplyPoint(vertices[indice2]);
Vector3 normal = GetTriangleNormal(vertice0, vertice1, vertice2);
if (Vector3.Angle(-Vector3.forward, normal) >= _maxAngle)
{
continue;
}
List <Vector3> poly = new List <Vector3> {
vertice0, vertice1, vertice2
};
ClipPoly(ref poly, right);
if (poly.Count == 0)
{
continue;
}
ClipPoly(ref poly, left);
if (poly.Count == 0)
{
continue;
}
ClipPoly(ref poly, top);
if (poly.Count == 0)
{
continue;
}
ClipPoly(ref poly, bottom);
if (poly.Count == 0)
{
continue;
}
ClipPoly(ref poly, front);
if (poly.Count == 0)
{
continue;
}
ClipPoly(ref poly, back);
if (poly.Count == 0)
{
continue;
}
AddPoly(poly, normal);
}
FinalizeMesh();
CompositeMesh();
}