From: Alexis Laferrière Date: Mon, 1 Feb 2016 19:35:52 +0000 (-0500) Subject: lib/gamnit flat: rotation follows the right hand rule on the Z axis X-Git-Url: http://nitlanguage.org lib/gamnit flat: rotation follows the right hand rule on the Z axis Signed-off-by: Alexis Laferrière --- diff --git a/lib/gamnit/flat.nit b/lib/gamnit/flat.nit index b489f1c..b74da82 100644 --- a/lib/gamnit/flat.nit +++ b/lib/gamnit/flat.nit @@ -52,7 +52,7 @@ class Sprite # Position of this sprite in world coordinates var center: Point3d[Float] is writable - # Rotation on the Z axis + # Rotation on the Z axis, where 0.0 points right and `0.5*pi` points up var rotation = 0.0 is writable # Mirror `texture` horizontally, inverting each pixel on the X axis @@ -95,7 +95,7 @@ class Sprite else texture.texture_coords, 2) simple_2d_program.coord.array(texture.vertices, 3) - simple_2d_program.rotation.uniform new Matrix.rotation(rotation, 0.0, 0.0, 1.0) + simple_2d_program.rotation.uniform new Matrix.rotation(rotation, 0.0, 0.0, -1.0) glDrawArrays(gl_TRIANGLE_STRIP, 0, 4) end