private void CreateBodiesForEachFace(DoublyConnectedEdgeList dcel, Material material, Vector3 originalPosition)
{
float vWidth = dcel.ux - dcel.lx;
float vHeight = dcel.uy - dcel.ly;
float ox = originalPosition.x - width / 2;
float oy = originalPosition.z - height / 2;
//TODO hardcoded for now to figure out what the problem is
ox = -9.45f;
oy = -7.92f;
foreach (Face face in dcel.faceList)
{
float x = face.siteEvent.x * width / (vWidth * 4);
float y = face.siteEvent.y * height / (vHeight * 3);
GameObject fragment = new GameObject();
fragment.AddComponent <Rigidbody>();
MeshFilter meshFilter = fragment.AddComponent <MeshFilter>() as MeshFilter;
MeshRenderer meshRenderer = fragment.AddComponent <MeshRenderer>() as MeshRenderer;
meshRenderer.material = material;
meshFilter.mesh = GetMeshFor(face, dcel);
MeshCollider meshCollider = fragment.AddComponent <MeshCollider>() as MeshCollider;
meshCollider.convex = true;
meshCollider.sharedMesh = meshFilter.mesh;
fragment.transform.position = new Vector3(ox + x, originalPosition.y, oy + y);
}
}
void OnCollisionEnter(Collision col)
{
if (col.gameObject.tag == "Projectile")
{
Debug.Log("Entered collision with Projectile");
//remove this game object's mesh renderer,box collider,Mesh filter and rigid body
Vector3 originalPosition = transform.position;
Material material = this.RemoveAllComponents();
//create two game objects of half the the width as this cube
//add them as child to this cube
// GameObject first = Instantiate(Resources.Load("SplitHalf 1", typeof(GameObject))) as GameObject;
// GameObject second = Instantiate(Resources.Load("SplitHalf 2", typeof(GameObject))) as GameObject;
DoublyConnectedEdgeList dcel = new VoronoiFracture().GetVoronoiDiagram();
CreateBodiesForEachFace(dcel, material, originalPosition);
DoublyConnectedEdgeList d = null;
// d.ToString();//intentional program crash for pausing
}
}
public DoublyConnectedEdgeList GetVoronoiDiagram()
{
//input
float [,] input = new float[, ] {
{ 20, 80 }, { 40, 60 }, { 20, 30 }, { 70, 70 }, { 60, 50 }
};
DoublyConnectedEdgeList dcel = new DoublyConnectedEdgeList(0, 0, 100, 100);
SiteEvent siteEvent;
Face face;
//20,30
siteEvent = new SiteEvent(20, 20);
face = new Face(siteEvent);
siteEvent.face = face;
dcel.faceList.Add(face);
face.AddEdge(new Edge(new Vertex(50, 0)));
face.AddEdge(new Edge(new Vertex(48, 15)));
face.AddEdge(new Edge(new Vertex(15, 45)));
face.AddEdge(new Edge(new Vertex(0, 45)));
face.AddEdge(new Edge(new Vertex(0, 0)));
//70,30
siteEvent = new SiteEvent(70, 30);
face = new Face(siteEvent);
siteEvent.face = face;
dcel.faceList.Add(face);
face.AddEdge(new Edge(new Vertex(50, 0)));
face.AddEdge(new Edge(new Vertex(100, 0)));
face.AddEdge(new Edge(new Vertex(100, 58)));
face.AddEdge(new Edge(new Vertex(55, 35)));
face.AddEdge(new Edge(new Vertex(48, 15)));
//40,60
siteEvent = new SiteEvent(40, 40);
face = new Face(siteEvent);
siteEvent.face = face;
dcel.faceList.Add(face);
face.AddEdge(new Edge(new Vertex(48, 15)));
face.AddEdge(new Edge(new Vertex(55, 35)));
face.AddEdge(new Edge(new Vertex(43, 65)));
face.AddEdge(new Edge(new Vertex(15, 45)));
//60,50
siteEvent = new SiteEvent(60, 50);
face = new Face(siteEvent);
siteEvent.face = face;
dcel.faceList.Add(face);
face.AddEdge(new Edge(new Vertex(55, 35)));
face.AddEdge(new Edge(new Vertex(100, 58)));
face.AddEdge(new Edge(new Vertex(100, 100)));
face.AddEdge(new Edge(new Vertex(50, 100)));
face.AddEdge(new Edge(new Vertex(43, 65)));
//20,70
siteEvent = new SiteEvent(20, 70);
face = new Face(siteEvent);
siteEvent.face = face;
dcel.faceList.Add(face);
face.AddEdge(new Edge(new Vertex(0, 45)));
face.AddEdge(new Edge(new Vertex(15, 45)));
face.AddEdge(new Edge(new Vertex(43, 65)));
face.AddEdge(new Edge(new Vertex(50, 100)));
face.AddEdge(new Edge(new Vertex(0, 100)));
return(dcel);
}
private Mesh GetMeshFor(Face face, DoublyConnectedEdgeList dcel)
{
float vWidth = dcel.ux - dcel.lx;
float vHeight = dcel.uy - dcel.ly;
List <Vector3> vertexList = new List <Vector3>();
List <Vector2> uvList = new List <Vector2>();
Edge t = face.GetStartingEdge();
do
{
float x = t.origin.x * width / vWidth;
float y = t.origin.y * height / vHeight;
Vector3 vertex = new Vector3(x, thickness, y);
vertexList.Add(vertex);
uvList.Add(new Vector2(t.origin.x / vWidth, t.origin.y / vHeight));
t = t.next;
}while(t != face.GetStartingEdge());
//repeat for lower side
t = face.GetStartingEdge();
do
{
float x = t.origin.x * width / vWidth;
float y = t.origin.y * height / vHeight;
Vector3 vertex = new Vector3(x, -thickness, y);
vertexList.Add(vertex);
uvList.Add(new Vector2(t.origin.x / vWidth, t.origin.y / vHeight));
t = t.next;
}while(t != face.GetStartingEdge());
Vector3 [] vertices = vertexList.ToArray();
//there are n-2 triangles on this convex polygon
List <int> triangles = new List <int>();
//polyogn on upper side
for (int i = 1; i < vertices.Length / 2 - 1; i++)
{
//always add group of 3
triangles.Add(0);
triangles.Add(i + 1);
triangles.Add(i);
}
//polyogn on lower side
int resetIndex = vertices.Length / 2;
for (int i = 1; i < vertices.Length / 2 - 1; i++)
{
//always add group of 3
triangles.Add(resetIndex + 0);
triangles.Add(resetIndex + i);
triangles.Add(resetIndex + i + 1);
}
//triangles for thickness sides
for (int i = 0; i < vertices.Length / 2 - 1; i++)
{
// add group of 3 for one triangle of rectangle
triangles.Add(i);
triangles.Add(i + 1);
triangles.Add(resetIndex + i + 1);
triangles.Add(i);
triangles.Add(resetIndex + i + 1);
triangles.Add(resetIndex + i);
}
//handle the last case seperately because its wrapping around
// add group of 3 for one triangle of rectangle (using exisitng i)
int j = vertices.Length / 2 - 1;
triangles.Add(j);
triangles.Add(0);
triangles.Add(resetIndex + 0);
triangles.Add(j);
triangles.Add(resetIndex + 0);
triangles.Add(resetIndex + j);
int [] trianglesArray = triangles.ToArray();
Mesh mesh = new Mesh();
mesh.vertices = vertices;
mesh.triangles = trianglesArray;
mesh.uv = uvList.ToArray();
return(mesh);
}
