public Mesh CreateMeshFromPoints(bool combine)
{
if (spriteRenderer != null && points.Length > 2) {
int pointNum = points.Length;
if (combine && combineMesh != null) {
pointNum = points.Length + combineMesh.vertices.Length;
}
//Create triangle.NET geometry
TriangleNet.Geometry.InputGeometry geometry = new TriangleNet.Geometry.InputGeometry(pointNum);
geometry.AddPolygon(points);
if (combine && combineMesh != null) {
geometry.AddPolygon(combineMesh.vertices.Select(x => (Vector2)x).ToArray());
}
//Triangulate
TriangleNet.Mesh triangleMesh = new TriangleNet.Mesh();
triangleMesh.Triangulate(geometry);
//transform vertices
points = new Vector2[triangleMesh.Vertices.Count];
Vector3[] vertices = new Vector3[triangleMesh.Vertices.Count];
Vector3[] normals = new Vector3[triangleMesh.Vertices.Count];
int n = 0;
foreach(TriangleNet.Data.Vertex v in triangleMesh.Vertices)
{
points[n] = new Vector2((float)v.X, (float)v.Y);
vertices[n] = new Vector3((float)v.X, (float)v.Y, 0);
normals[n]=new Vector3(0,0,-1);
n++;
}
//transform triangles
int[] triangles = triangleMesh.Triangles.ToUnityMeshTriangleIndices();
mesh.Clear();
mesh = new Mesh();
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.uv = genUV(mesh.vertices);
mesh.normals = normals;
return mesh;
}
else {
return null;
}
}
public Mesh CreateMeshFromPoints(bool combine)
{
if (spriteRenderer != null && points.Length > 2)
{
int pointNum = points.Length;
if (combine && combineMesh != null)
{
pointNum = points.Length + combineMesh.vertices.Length;
}
//Create triangle.NET geometry
TriangleNet.Geometry.InputGeometry geometry = new TriangleNet.Geometry.InputGeometry(pointNum);
geometry.AddPolygon(points);
if (combine && combineMesh != null)
{
geometry.AddPolygon(combineMesh.vertices.Select(x => (Vector2)x).ToArray());
}
//Triangulate
TriangleNet.Mesh triangleMesh = new TriangleNet.Mesh();
triangleMesh.Triangulate(geometry);
//transform vertices
points = new Vector2[triangleMesh.Vertices.Count];
Vector3[] vertices = new Vector3[triangleMesh.Vertices.Count];
Vector2[] uvs = new Vector2[triangleMesh.Vertices.Count];
Vector3[] normals = new Vector3[triangleMesh.Vertices.Count];
int n = 0;
foreach (TriangleNet.Data.Vertex v in triangleMesh.Vertices)
{
points[n] = new Vector2((float)v.X, (float)v.Y);
vertices[n] = new Vector3((float)v.X, (float)v.Y, 0);
normals[n] = new Vector3(0, 0, -1);
n++;
}
//transform triangles
int[] triangles = triangleMesh.Triangles.ToUnityMeshTriangleIndices();
mesh.Clear();
mesh = new Mesh();
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.uv = genUV(mesh.vertices);
mesh.normals = normals;
return(mesh);
}
else
{
return(null);
}
}
private void CreateMesh()
{
Sprite sprite = spriteRenderer.sprite;
Rect bounds = GetBounds(polygon);
TriangleNet.Mesh tnMesh = new TriangleNet.Mesh();
TriangleNet.Geometry.InputGeometry input = new TriangleNet.Geometry.InputGeometry();
input.AddPolygon(polygon);
tnMesh.Triangulate(input);
Mesh mesh = new Mesh();
mesh.vertices = tnMesh.Vertices.Select(p => new Vector3((float)p.X, (float)p.Y, 0)).ToArray();
// Not sure about winding
// If there is an interesting error, It is probably because of cw/ccw windings
int[] tris = tnMesh.Triangles.ToUnityMeshTriangleIndices();
mesh.triangles = tris;
List<Vector2> uv = new List<Vector2>();
Vector3 lower = new Vector3(bounds.x, bounds.y);
Vector3 size = new Vector3(bounds.xMax, bounds.yMax) - lower;
Rect uv_bounds = new Rect(sprite.rect.x / sprite.texture.width, sprite.rect.y / sprite.texture.height, sprite.rect.width / sprite.texture.width, sprite.rect.height / sprite.texture.height);
float scalex = sprite.bounds.size.x / bounds.width;
float scaley = sprite.bounds.size.y / bounds.height;
Vector3[] scaled = mesh.vertices;
for (int i = 0; i < mesh.vertices.Length; i++) {
Vector3 v = scaled[i];
Vector3 rel = v - lower;
uv.Add(new Vector2(rel.x / size.x * uv_bounds.width, rel.y / size.y * uv_bounds.height) + new Vector2(uv_bounds.x, uv_bounds.y));
scaled[i] = new Vector3(v.x * scalex, v.y * scaley, v.z) - ((Vector3)bounds.center * scalex) + sprite.bounds.center;
}
mesh.MarkDynamic();
mesh.vertices = scaled;
mesh.uv = uv.ToArray();
mesh.RecalculateNormals();
mesh.RecalculateBounds();
//GameObject go = new GameObject();
//MeshFilter mf = go.AddComponent<MeshFilter>();
//mf.sharedMesh = mesh;
//MeshRenderer mr = go.AddComponent<MeshRenderer>();
//mr.sharedMaterial = spriteRenderer.sharedMaterial;
// Check if the Meshes directory exists, if not, create it.
DirectoryInfo meshDir = new DirectoryInfo("Assets/Meshes");
if (Directory.Exists(meshDir.FullName) == false)
{
Directory.CreateDirectory(meshDir.FullName);
}
ScriptableObjectUtility.CreateAsset(mesh, "Meshes/" + spriteRenderer.gameObject.name + ".Mesh");
}
private void CreateMesh()
{
Sprite sprite = spriteRenderer.sprite;
Rect bounds = GetBounds(polygon);
TriangleNet.Mesh tnMesh = new TriangleNet.Mesh();
TriangleNet.Geometry.InputGeometry input = new TriangleNet.Geometry.InputGeometry();
input.AddPolygon(polygon);
tnMesh.Triangulate(input);
Mesh mesh = new Mesh();
mesh.vertices = tnMesh.Vertices.Select(p => new Vector3((float)p.X, (float)p.Y, 0)).ToArray();
// Not sure about winding
// If there is an interesting error, It is probably because of cw/ccw windings
int[] tris = tnMesh.Triangles.ToUnityMeshTriangleIndices();
mesh.triangles = tris;
List <Vector2> uv = new List <Vector2>();
Vector3 lower = new Vector3(bounds.x, bounds.y);
Vector3 size = new Vector3(bounds.xMax, bounds.yMax) - lower;
Rect uv_bounds = new Rect(sprite.rect.x / sprite.texture.width, sprite.rect.y / sprite.texture.height, sprite.rect.width / sprite.texture.width, sprite.rect.height / sprite.texture.height);
float scalex = sprite.bounds.size.x / bounds.width;
float scaley = sprite.bounds.size.y / bounds.height;
Vector3[] scaled = mesh.vertices;
for (int i = 0; i < mesh.vertices.Length; i++)
{
Vector3 v = scaled[i];
Vector3 rel = v - lower;
uv.Add(new Vector2(rel.x / size.x * uv_bounds.width, rel.y / size.y * uv_bounds.height) + new Vector2(uv_bounds.x, uv_bounds.y));
scaled[i] = new Vector3(v.x * scalex, v.y * scaley, v.z) - ((Vector3)bounds.center * scalex) + sprite.bounds.center;
}
mesh.MarkDynamic();
mesh.vertices = scaled;
mesh.uv = uv.ToArray();
mesh.RecalculateNormals();
mesh.RecalculateBounds();
mesh.Optimize();
//GameObject go = new GameObject();
//MeshFilter mf = go.AddComponent<MeshFilter>();
//mf.sharedMesh = mesh;
//MeshRenderer mr = go.AddComponent<MeshRenderer>();
//mr.sharedMaterial = spriteRenderer.sharedMaterial;
// Check if the Meshes directory exists, if not, create it.
DirectoryInfo meshDir = new DirectoryInfo("Assets/Meshes");
if (Directory.Exists(meshDir.FullName) == false)
{
Directory.CreateDirectory(meshDir.FullName);
}
ScriptableObjectUtility.CreateAsset(mesh, "Meshes/" + spriteRenderer.gameObject.name + ".Mesh");
}