| public GetPickingRay ( System.Vector2 sp, System.Vector2 screenDims ) : Ray | ||
| sp | System.Vector2 | |
| screenDims | System.Vector2 | |
| return | Ray | |
public Ray GetPickingRay(Vector2 sp, Vector2 screenDims) {
// convert screen pixel to view space
var vx = (2.0f * sp.X / screenDims.X - 1.0f) / Proj.M11;
var vy = (-2.0f * sp.Y / screenDims.Y + 1.0f) / Proj.M22;
var ray = new Ray(new Vector3(), new Vector3(vx, vy, 1.0f));
ray = new Ray(Vector3.TransformCoordinate(ray.Position, ViewInvert), Vector3.TransformNormal(ray.Direction, ViewInvert));
ray.Direction.Normalize();
return ray;
}
