/**
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* Transforms a plane.
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*
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* @name czm_transformPlane
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* @glslFunction
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*
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* @param {vec4} plane The plane in Hessian Normal Form.
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* @param {mat4} transform The inverse-transpose of a transformation matrix.
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*/
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vec4 czm_transformPlane(vec4 plane, mat4 transform) {
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vec4 transformedPlane = transform * plane;
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// Convert the transformed plane to Hessian Normal Form
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float normalMagnitude = length(transformedPlane.xyz);
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return transformedPlane / normalMagnitude;
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}
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