point_ray_distance_sq()

float MayaFlux::Kinesis::point_ray_distance_sq ( const Ray &  ray, const glm::vec3 &  point, float *  out_t = nullptr  )

inline

Squared perpendicular distance from a point to an infinite ray.

Parameters

ray	World-space ray.
point	World-space position.
out_t	If non-null, receives the projection parameter along the ray. Negative values indicate the point is behind the origin.

Returns

Squared perpendicular distance.

Definition at line 84 of file HitTest.hpp.

{
    glm::vec3 op = point - ray.origin;
    float t = glm::dot(op, ray.direction);
    glm::vec3 closest = ray.origin + ray.direction * t;
    glm::vec3 diff = point - closest;
    if (out_t) {
        *out_t = t;
    }
    return glm::dot(diff, diff);
}

References MayaFlux::Kinesis::Ray::direction, and MayaFlux::Kinesis::Ray::origin.

Referenced by ray_cast(), and ray_cast_all().

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