# Tetra-Demo {#v4d_tetra}

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| Original author | Amir Hassan (kallaballa) <amir@viel-zu.org> |
| Compatibility | OpenCV >= 4.7 |

Renders a rainbow tetrahedron on blue background using OpenGL, applies a glow effect using OpenCV (OpenCL) and encodes on the GPU (VAAPI).

@youtube{ljV9FogPTpM}

@include samples/cpp/tetra/tetra-demo.cpp