Add the possibility to create custom 2d orthographic cameras

Author: nsarlin

crates/bevy_render/src/camera/bundle.rs

@@ -93,11 +93,16 @@ impl OrthographicCameraBundle {
     /// corresponding to `Z=+999.9` (closest to camera) to `Z=-0.1` (furthest away from
     /// camera) in world space.
     pub fn new_2d() -> Self {
+        Self::custom_2d(1000.0, 1.0)
+    }
+
+    /// Create an orthographic projection camera with a custom Z position and scale.
+    pub fn custom_2d(far: f32, scale: f32) -> Self {
         // we want 0 to be "closest" and +far to be "farthest" in 2d, so we offset
         // the camera's translation by far and use a right handed coordinate system
-        let far = 1000.0;
         let orthographic_projection = OrthographicProjection {
             far,
+            scale,
             depth_calculation: DepthCalculation::ZDifference,
             ..Default::default()
         };