cube_face_basis.hpp

Go to the documentation of this file.

 
#pragma once
 
#include <cstdint>
#include <glm/glm.hpp>
 
namespace renderer {
 
struct CubeFaceBasis {
  glm::vec3 right;
  glm::vec3 up;
  glm::vec3 forward;
};

[[nodiscard]]
inline auto cubeFaceBasis(uint32_t face) -> CubeFaceBasis {
  switch (face) {
    case 0:
      return {
        {0.0f,  0.0f, -1.0f},
        {0.0f, -1.0f,  0.0f},
        {1.0f,  0.0f,  0.0f}
      };
    case 1:
      return {
        { 0.0f,  0.0f, 1.0f},
        { 0.0f, -1.0f, 0.0f},
        {-1.0f,  0.0f, 0.0f}
      };
    case 2:
      return {
        {1.0f, 0.0f, 0.0f},
        {0.0f, 0.0f, 1.0f},
        {0.0f, 1.0f, 0.0f}
      };
    case 3:
      return {
        {1.0f,  0.0f,  0.0f},
        {0.0f,  0.0f, -1.0f},
        {0.0f, -1.0f,  0.0f}
      };
    case 4:
      return {
        {1.0f,  0.0f, 0.0f},
        {0.0f, -1.0f, 0.0f},
        {0.0f,  0.0f, 1.0f}
      };
    default:
      return {
        {-1.0f,  0.0f,  0.0f},
        { 0.0f, -1.0f,  0.0f},
        { 0.0f,  0.0f, -1.0f}
      };
  }
}
 
}