//Function to create quad mesh
void OnWizardCreate()
{
if (meshSource == null)
{
Debug.LogError("You have to select a mesh");
return;
}
/// 2d ColliderGen v1.4 takes a "z-thickness" property for the mesh generation and locates
/// one plane at z-thicknes/2 and the other at -z-thickness/2.
/// Also the amount of vertices we set in the "Outline Vertex Count" property is quadruplied.
/// Eg: having an outline of 24 verts will generate a mesh collider of 92 verts.
/// So we need to extract only frontal vertices (z = z-thickness/2) and avoid duplicates
Vector3[] colliderVerts = meshSource.vertices;
HashSet <Vector3> vertsSet = new HashSet <Vector3> (new Vector3Comparer());
for (int i = 0, c = colliderVerts.Length; i < c; ++i)
{
vertsSet.Add(colliderVerts [i]);
}
// the set should contain colliderVerts/2 verts according to my analysis
if (vertsSet.Count != colliderVerts.Length / 2)
{
Debug.LogWarning("Set of vertices should contain colliderVerts/2 verts. The set has " +
vertsSet.Count + " and colliderVerts/2 = " + colliderVerts.Length / 2);
}
// although we only take frontal vertices, some of them may be duplicated
HashSet <Vector2> verts2DSet = new HashSet <Vector2> (new Vector2Comparer());
float z = sourceZThickness / 2f;
foreach (Vector3 v in vertsSet)
{
if (v.z == z)
{
verts2DSet.Add((Vector2)v);
}
}
Vector2[] verts = new Vector2[verts2DSet.Count];
verts2DSet.CopyTo(verts);
// triangulate
Mesh mesh = Triangulator.CreateMesh3D(verts, 0f); // use 0 for no extruding
mesh.name = meshName;
// it seems that 2D ColliderGen creates meshes normalized inside unitary XY plane center in 0.0, so the UVs are offset by 0.5
Vector2[] uvs = mesh.uv;
for (int i = 0, c = uvs.Length; i < c; ++i)
{
uvs[i].x += 0.5f;
uvs[i].y += 0.5f;
}
mesh.uv = uvs;
//Create or Replace asset in database
CreateOrReplaceAsset(mesh);
//Create game object to locate into the scene
if (createGameObject)
{
GameObject _2d_mesh = new GameObject(gameObjectName);
MeshFilter meshFilter = (MeshFilter)_2d_mesh.AddComponent(typeof(MeshFilter));
_2d_mesh.AddComponent(typeof(MeshRenderer));
_2d_mesh.GetComponent <MeshRenderer>().castShadows = false;
_2d_mesh.GetComponent <MeshRenderer>().receiveShadows = false;
_2d_mesh.GetComponent <MeshRenderer>().sharedMaterial = materialToUse;
meshFilter.sharedMesh = mesh;
}
}
