triangle-cull-state
GPU-accelerated rendering » GPU state

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Vocabulary
gpu.state

Class description
The triangle-cull-state controls what faces of triangles are rasterized.

•	The front-face slot determines which vertex winding order is considered the front face of a triangle: face-ccw or face-cw.
•	The cull slot determines which triangle faces are discarded: cull-front, cull-back, cull-all, or f to disable triangle culling.

See also
<triangle-cull-state>, get-triangle-cull-state

Definition

IN: gpu.state

TUPLE: triangle-cull-state
    { front-face triangle-face read-only initial: face-ccw }
    { cull maybe{ triangle-cull } read-only initial: f } ;

Methods

USING: accessors combinators gpu.state gpu.state.private kernel
opengl.gl ;

M: triangle-cull-state set-gpu-state*
    {
        [ front-face>> gl-triangle-face glFrontFace ]
        [
            GL_CULL_FACE swap cull>>
            [ gl-triangle-cull glCullFace glEnable ]
            [ glDisable ] if*
        ]
    } cleave ;