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103 lines
2.2 KiB
JavaScript
103 lines
2.2 KiB
JavaScript
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#pragma strict
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static var meshes : Mesh[];
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static var currentTris : int = 0;
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static function HasMeshes () : boolean {
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if (!meshes)
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return false;
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for (var m : Mesh in meshes)
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if (null == m)
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return false;
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return true;
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}
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static function Cleanup () {
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if (!meshes)
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return;
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for (var m : Mesh in meshes) {
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if (null != m) {
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DestroyImmediate (m);
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m = null;
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}
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}
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meshes = null;
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}
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static function GetMeshes (totalWidth : int, totalHeight : int) : Mesh[]
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{
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if (HasMeshes () && (currentTris == (totalWidth * totalHeight))) {
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return meshes;
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}
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var maxTris : int = 65000 / 3;
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var totalTris : int = totalWidth * totalHeight;
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currentTris = totalTris;
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var meshCount : int = Mathf.CeilToInt ((1.0f * totalTris) / (1.0f * maxTris));
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meshes = new Mesh[meshCount];
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var i : int = 0;
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var index : int = 0;
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for (i = 0; i < totalTris; i += maxTris) {
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var tris : int = Mathf.FloorToInt (Mathf.Clamp ((totalTris-i), 0, maxTris));
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meshes[index] = GetMesh (tris, i, totalWidth, totalHeight);
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index++;
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}
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return meshes;
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}
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static function GetMesh (triCount : int, triOffset : int, totalWidth : int, totalHeight : int) : Mesh
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{
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var mesh = new Mesh ();
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mesh.hideFlags = HideFlags.DontSave;
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var verts : Vector3[] = new Vector3[triCount*3];
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var uvs : Vector2[] = new Vector2[triCount*3];
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var uvs2 : Vector2[] = new Vector2[triCount*3];
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var tris : int[] = new int[triCount*3];
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var size : float = 0.0075f;
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for (var i : int = 0; i < triCount; i++)
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{
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var i3 : int = i * 3;
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var vertexWithOffset : int = triOffset + i;
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var x : float = Mathf.Floor(vertexWithOffset % totalWidth) / totalWidth;
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var y : float = Mathf.Floor(vertexWithOffset / totalWidth) / totalHeight;
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var position : Vector3 = Vector3 (x*2-1,y*2-1, 1.0);
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verts[i3 + 0] = position;
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verts[i3 + 1] = position;
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verts[i3 + 2] = position;
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uvs[i3 + 0] = Vector2 (0.0f, 0.0f);
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uvs[i3 + 1] = Vector2 (1.0f, 0.0f);
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uvs[i3 + 2] = Vector2 (0.0f, 1.0f);
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uvs2[i3 + 0] = Vector2 (x, y);
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uvs2[i3 + 1] = Vector2 (x, y);
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uvs2[i3 + 2] = Vector2 (x, y);
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tris[i3 + 0] = i3 + 0;
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tris[i3 + 1] = i3 + 1;
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tris[i3 + 2] = i3 + 2;
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}
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mesh.vertices = verts;
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mesh.triangles = tris;
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mesh.uv = uvs;
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mesh.uv2 = uvs2;
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return mesh;
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}
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