DOC_TBA
Example
// Compute the outward-facing cone normal where a ray first intersects a cone czm_ray ray = czm_ray(vec3(0.0), vec3(0.0, 0.0, 1.0)); // origin, direction czm_cone cone = czm_coneNew(vec3(0.0, 0.0, 1.0), vec3(0.0, 0.0, 1.0), radians(45.0)); // vertex, axis, halfAperture czm_raySegment i = czm_rayConeIntersectionInterval(ray, cone); vec3 normal = czm_coneNormal(cone, czm_pointAlongRay(ray, i.start));