Obtain rectangle indicating 2D world space camera can see
- by Gareth
I have a 2D tile based game in XNA, with a moveable camera that can scroll around and zoom.
I'm trying to obtain a rectangle which indicates the area, in world space, that my camera is looking at, so I can render anything this rectangle intersects with (currently, everything is rendered).
So, I'm drawing the world like this:
_SpriteBatch.Begin(
SpriteSortMode.FrontToBack,
null,
SamplerState.PointClamp, // Don't smooth
null, null, null,
_Camera.GetTransformation());
The GetTransformation() method on my Camera object does this:
public Matrix GetTransformation()
{
_transform =
Matrix.CreateTranslation(new Vector3(-_pos.X, -_pos.Y, 0)) *
Matrix.CreateRotationZ(Rotation) *
Matrix.CreateScale(new Vector3(Zoom, Zoom, 1)) *
Matrix.CreateTranslation(new Vector3(_viewportWidth * 0.5f,
_viewportHeight * 0.5f, 0));
return _transform;
}
The camera properties in the method above should be self explanatory.
How can I get a rectangle indicating what the camera is looking at in world space?
