public static Object2ObjectBoxSnapData Create(GameObject meshObject)
{
if (meshObject == null)
{
return(null);
}
Mesh objectMesh = meshObject.GetMeshFromFilterOrSkinnedMeshRenderer();
if (objectMesh == null)
{
return(null);
}
Renderer renderer = meshObject.GetRenderer();
if (renderer == null || !renderer.enabled)
{
return(null);
}
Octave3DMesh octaveMesh = Octave3DMeshDatabase.Get().GetOctave3DMesh(objectMesh);
if (octaveMesh == null)
{
return(null);
}
List <Box> modelVertOverlapBoxes = BuildModelVertOverlapBoxes(octaveMesh);
var snapBoxIDs = Object2ObjectBoxSnapData.GetAllSnapBoxIDs();
var modelSnapBoxes = new List <Box>(snapBoxIDs.Length);
Box modelMeshBox = octaveMesh.ModelAABB;
BoxFace[] meshBoxFaces = Object2ObjectBoxSnapData.GetBoxFaceToSnapBoxIDMap();
foreach (var snapBox in snapBoxIDs)
{
Box overlapBox = modelVertOverlapBoxes[(int)snapBox];
List <Vector3> overlappedVerts = octaveMesh.GetOverlappedModelVerts(overlapBox);
Plane meshFacePlane = modelMeshBox.GetBoxFacePlane(meshBoxFaces[(int)snapBox]);
overlappedVerts = meshFacePlane.ProjectAllPoints(overlappedVerts);
modelSnapBoxes.Add(Box.FromPoints(overlappedVerts));
}
return(new Object2ObjectBoxSnapData(meshObject, modelSnapBoxes));
}
private static List <Box> BuildModelVertOverlapBoxes(Octave3DMesh octaveMesh)
{
const float overlapAmount = 0.2f;
float halfOverlapAmount = overlapAmount * 0.5f;
Box modelMeshBox = octaveMesh.ModelAABB;
Vector3 meshBoxSize = modelMeshBox.Size;
BoxFace[] meshBoxFaces = Object2ObjectBoxSnapData.GetBoxFaceToSnapBoxIDMap();
// Must have 1 to 1 mapping with Object2ObjectBoxSnapData.SnapBox enum
const float sizeEps = 0.001f;
Vector3[] overlapBoxSizes = new Vector3[]
{
// Left and right
new Vector3(overlapAmount, meshBoxSize.y + sizeEps, meshBoxSize.z + sizeEps),
new Vector3(overlapAmount, meshBoxSize.y + sizeEps, meshBoxSize.z + sizeEps),
// Bottom and top
new Vector3(meshBoxSize.x + sizeEps, overlapAmount, meshBoxSize.z + sizeEps),
new Vector3(meshBoxSize.x + sizeEps, overlapAmount, meshBoxSize.z + sizeEps),
// Back and front
new Vector3(meshBoxSize.x + sizeEps, meshBoxSize.y + sizeEps, overlapAmount),
new Vector3(meshBoxSize.x + sizeEps, meshBoxSize.y + sizeEps, overlapAmount),
};
var overlapBoxes = new List <Box>();
for (int boxFaceIndex = 0; boxFaceIndex < meshBoxFaces.Length; ++boxFaceIndex)
{
BoxFace meshBoxFace = meshBoxFaces[boxFaceIndex];
Vector3 faceCenter = modelMeshBox.GetBoxFaceCenter(meshBoxFace);
Vector3 faceNormal = modelMeshBox.GetBoxFacePlane(meshBoxFace).normal;
Vector3 overlapCenter = faceCenter - faceNormal * halfOverlapAmount;
overlapBoxes.Add(new Box(overlapCenter, overlapBoxSizes[boxFaceIndex]));
}
return(overlapBoxes);
}