/*
* 设置贴花类型
*/
void SetDecalType(CLIPSHAPE_TYPE type)
{
getDecal().shapeType = type;
getDecal().UpdateSelf();
}
public static void BuildDecalForObject(Decal decal, CLIPSHAPE_TYPE eShapeType, float fAngle, GameObject affectedObject)
{
Mesh affectedMesh = null;
MeshCollider mc = affectedObject.GetComponent <MeshCollider>();
if (mc != null)
{
affectedMesh = mc.sharedMesh;
}
else
{
MeshFilter mf = affectedObject.GetComponent <MeshFilter>();
if (mf != null)
{
affectedMesh = mf.sharedMesh;
}
}
if (affectedMesh == null || affectedMesh.isReadable == false)
{
return;
}
float maxSlopeAngle = decal.maxSlopeAngle;
Vector3[] vertices = affectedMesh.vertices;
int[] triangles = affectedMesh.triangles;
int startVertexCount = bufVertices.Count;
Matrix4x4 matrix = decal.transform.worldToLocalMatrix * affectedObject.transform.localToWorldMatrix;
for (int i = 0; i < triangles.Length; i += 3)
{
int i1 = triangles[i];
int i2 = triangles[i + 1];
int i3 = triangles[i + 2];
Vector3 v1 = matrix.MultiplyPoint(vertices[i1]);
Vector3 v2 = matrix.MultiplyPoint(vertices[i2]);
Vector3 v3 = matrix.MultiplyPoint(vertices[i3]);
Vector3 side1 = v2 - v1;
Vector3 side2 = v3 - v1;
Vector3 normal = Vector3.Cross(side1, side2).normalized;
if (Vector3.Angle(Vector3.up, normal) >= maxSlopeAngle)
{
continue;
}
if (eShapeType == CLIPSHAPE_TYPE.CST_SQUARE)
{
DecalPolygon poly = ClipPolygonBySquare(v1, v2, v3);
if (poly != null)
{
AddPolygon(poly, normal);
}
}
else if (eShapeType == CLIPSHAPE_TYPE.CST_SECTOR)
{
if (fAngle <= 0f && fAngle >= 360f)
{
LogMgr.UnityError("Sector angle beyond Range! Must limit it greater than 0 degree and less than 360 degree.");
continue;
}
if (fAngle <= 180f)
{
DecalPolygon poly = ClipPolygonByConvexSector(fAngle, v1, v2, v3);
if (poly != null)
{
AddPolygon(poly, normal);
}
}
else
{
DecalPolygon poly = ClipPolygonByNonConvexSector(fAngle, v1, v2, v3, false);
if (poly != null)
{
AddPolygon(poly, normal);
}
DecalPolygon polySec = ClipPolygonByNonConvexSector(fAngle, v1, v2, v3, true);
if (polySec != null)
{
AddPolygon(polySec, normal);
}
}
}
}
//GenerateTexCoords(startVertexCount, decal.sprite);
GenerateTexCoords(startVertexCount, decal);
}