gamnit: intro more anchor points

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/gamnit/cameras.nit b/lib/gamnit/cameras.nit
index 0756a38..401e1ce 100644 (file)
--- a/lib/gamnit/cameras.nit
+++ b/lib/gamnit/cameras.nit
@@ -240,16 +240,28 @@ class UICamera
        # Center of the screen, from the point of view of the camera, at z = 0
        fun center: Point3d[Float] do return new Point3d[Float](position.x + width / 2.0, position.y - height / 2.0, 0.0)
 
-       # Anchor in the top left corner of the screen, at z = 0
+       # Center of the top of the screen, at z = 0
+       fun top: Point3d[Float] do return new Point3d[Float](position.x + width / 2.0, position.y, 0.0)
+
+       # Center of the bottom of the screen, at z = 0
+       fun bottom: Point3d[Float] do return new Point3d[Float](position.x + width / 2.0, position.y - height, 0.0)
+
+       # Center of the left border of the screen, at z = 0
+       fun left: Point3d[Float] do return new Point3d[Float](position.x, position.y - height / 2.0, 0.0)
+
+       # Center of the right border of the screen, at z = 0
+       fun right: Point3d[Float] do return new Point3d[Float](position.x + width, position.y - height / 2.0, 0.0)
+
+       # Top left corner of the screen, at z = 0
        fun top_left: Point3d[Float] do return new Point3d[Float](position.x, position.y, 0.0)
 
-       # Anchor in the top right corner of the screen, at z = 0
+       # Top right corner of the screen, at z = 0
        fun top_right: Point3d[Float] do return new Point3d[Float](position.x + width, position.y, 0.0)
 
-       # Anchor in the bottom left corner of the screen, at z = 0
+       # Bottom left corner of the screen, at z = 0
        fun bottom_left: Point3d[Float] do return new Point3d[Float](position.x, position.y - height, 0.0)
 
-       # Anchor in the bottom right corner of the screen, at z = 0
+       # Bottom right corner of the screen, at z = 0
        fun bottom_right: Point3d[Float] do return new Point3d[Float](position.x + width, position.y - height, 0.0)
 
        # TODO cache the anchors and the matrix