src/graphics/SkyBoxMesh.hpp

   1 #ifndef GONG_GRAPHICS_SKYBOXMESH_HPP_
   2 #define GONG_GRAPHICS_SKYBOXMESH_HPP_
   3
   4 #include "glm.hpp"
   5 #include "VertexArray.hpp"
   6
   7 #include <vector>
   8
   9
  10 namespace gong {
  11 namespace graphics {
  12
  13 class SkyBoxMesh {
  14
  15 public:
  16         using Position = glm::vec3;
  17         using Index = unsigned int;
  18
  19         using Positions = std::vector<Position>;
  20         using Indices = std::vector<Index>;
  21
  22         enum Attribute {
  23                 ATTRIB_VERTEX,
  24                 ATTRIB_INDEX,
  25                 ATTRIB_COUNT,
  26         };
  27
  28         struct Buffer {
  29
  30                 Positions vertices;
  31                 Indices indices;
  32
  33                 void Clear() noexcept {
  34                         vertices.clear();
  35                         indices.clear();
  36                 }
  37
  38                 void Reserve(size_t p, size_t i) {
  39                         vertices.reserve(p);
  40                         indices.reserve(i);
  41                 }
  42
  43         };
  44
  45         using VAO = VertexArray<ATTRIB_COUNT>;
  46
  47 public:
  48         void LoadUnitBox();
  49         void Update(const Buffer &) noexcept;
  50
  51         bool Empty() const noexcept {
  52                 return vao.Empty();
  53         }
  54
  55         void Draw() const noexcept {
  56                 vao.DrawTriangleElements();
  57         }
  58
  59 private:
  60         VAO vao;
  61
  62 };
  63
  64 }
  65 }
  66
  67 #endif