ray.h

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#pragma once
 
#include "base/vec3.h"
#include "base/mat4.h"
 
namespace eu
{
    struct UnitRay3f
    {
        vec3f from;
        unit3f dir;
 
        UnitRay3f(const vec3f& from, const unit3f& dir);
 
        [[nodiscard]] static UnitRay3f from_to(const vec3f& from, const vec3f& to);
        [[nodiscard]] static UnitRay3f from_direction(const unit3f& dir);
 
        [[nodiscard]] vec3f get_point(float at) const;
        [[nodiscard]] UnitRay3f get_transform(const mat4f& m) const;
    };
 
 
    struct Ray2f
    {
        vec2f position;
        vec2f direction;
 
        Ray2f(const vec2f& p, const vec2f& d);
 
        [[nodiscard]] static Ray2f from_to(const vec2f& from, const vec2f& to);
        [[nodiscard]] static Ray2f from_direction(const vec2f& direction, const vec2f& pos = zero2f);
 
        [[nodiscard]] vec2f get_position(float d) const;
    };
 
    struct Ray3f
    {
        vec3f from;
        vec3f dir;
 
        Ray3f(const vec3f& from, const vec3f& dir);
 
        [[nodiscard]] static Ray3f from_to(const vec3f& from, const vec3f& to);
        [[nodiscard]] static Ray3f from_direction(const vec3f& dir);
 
        [[nodiscard]] vec3f get_point(float at) const;
        [[nodiscard]] UnitRay3f get_normalized() const;
    };
 
}