/** Build a new mesh for a sprite */
public SpriteMesh CreateMesh(Sprite sprite, bool exists)
{
SpriteMesh rtn = null;
if (!exists) {
var shader = Shader.Find("Custom/nPropShader");
rtn = new SpriteMesh() {
Material = new Material(shader),
Mesh = new Mesh(),
Position = new Vector3(),
Rotation = new Quaternion()
};
_cache[sprite.Id] = rtn;
}
else
rtn = _cache[sprite.Id];
UpdateMesh(rtn, sprite);
return rtn;
}
/** Rebuild parts of a mesh without creating a new one */
public void UpdateMesh(SpriteMesh sm, Sprite sprite)
{
nLog.Debug("Update!");
/* mesh, uvs, etc */
var verticies = new Vector3[4] {
new Vector3(sprite.Points[0], sprite.Points[1], 0f),
new Vector3(sprite.Points[2], sprite.Points[3], 0f),
new Vector3(sprite.Points[4], sprite.Points[5], 1f),
new Vector3(sprite.Points[6], sprite.Points[7], 1f)
};
var uvs = new Vector2[4] {
new Vector2(sprite.UV[0], sprite.UV[1]),
new Vector2(sprite.UV[2], sprite.UV[3]),
new Vector2(sprite.UV[4], sprite.UV[5]),
new Vector2(sprite.UV[6], sprite.UV[7])
};
var triangles = new int[6] {
0, 1, 2,
2, 1, 3,
};
sm.Mesh.vertices = verticies;
sm.Mesh.uv = uvs;
sm.Mesh.triangles = triangles;
sm.Mesh.RecalculateNormals();
/* material */
sm.Material.color = new Color(sprite.Color[0], sprite.Color[1], sprite.Color[2], sprite.Color[3]);
sm.Material.mainTexture = sprite.Texture;
/* position */
sm.Position[0] = sprite.Position[0];
sm.Position[1] = sprite.Position[1];
sm.Position[2] = sprite.Depth;
/* rotation */
sm.Rotation = Quaternion.AngleAxis(sprite.Rotation, new Vector3(sprite.Origin[0], sprite.Origin[1], 1.0f));
/* cache result */
sprite.Invalid = false;
}