INNER CODE UNIT · Python

CubeDrawable

mosra/magnum-examples · src/python/magnum-primitives-scenegraph.py:38

class CubeDrawable(scenegraph.Drawable3D):
    def __init__(self, object: Object3D, drawables: scenegraph.DrawableGroup3D,
                 mesh: gl.Mesh, shader: shaders.PhongGL, color: Color4):
        scenegraph.Drawable3D.__init__(self, object, drawables)

        self._mesh = mesh
        self._shader = shader
        self.color = color # Settable from outside

    def draw(self, transformation_matrix: Matrix4, camera: scenegraph.Camera3D):
        self._shader.light_positions = [
            Vector4(camera.camera_matrix.transform_point((-3.0, 5.0, 10.0)), 0.0)
        ]
        self._shader.light_colors = [Color3(1.0)]
        self._shader.diffuse_color = self.color
        self._shader.ambient_color = Color3.from_hsv(self.color.hue(), 1.0, 0.3)
        self._shader.transformation_matrix = transformation_matrix
        self._shader.normal_matrix = transformation_matrix.rotation_scaling()

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