model/Shape.hpp

   1 #ifndef BLANK_MODEL_SHAPE_HPP_
   2 #define BLANK_MODEL_SHAPE_HPP_
   3
   4 #include "CollisionBounds.hpp"
   5 #include "../geometry/primitive.hpp"
   6 #include "../graphics/BlockMesh.hpp"
   7 #include "../graphics/EntityMesh.hpp"
   8 #include "../graphics/glm.hpp"
   9 #include "../world/Block.hpp"
  10
  11 #include <memory>
  12 #include <vector>
  13
  14
  15 namespace blank {
  16
  17 class TokenStreamReader;
  18
  19 class Shape {
  20
  21 public:
  22         struct Faces {
  23                 bool face[Block::FACE_COUNT];
  24                 Faces &operator =(const Faces &other) noexcept {
  25                         for (int i = 0; i < Block::FACE_COUNT; ++i) {
  26                                 face[i] = other.face[i];
  27                         }
  28                         return *this;
  29                 }
  30                 bool operator [](Block::Face f) const noexcept {
  31                         return face[f];
  32                 }
  33         };
  34
  35
  36 public:
  37         Shape();
  38
  39         void Read(TokenStreamReader &);
  40
  41         bool FaceFilled(Block::Face face) const noexcept {
  42                 return fill[face];
  43         }
  44
  45         std::size_t VertexCount() const noexcept { return vertices.size(); }
  46         std::size_t IndexCount() const noexcept { return indices.size(); }
  47
  48         const glm::vec3 &VertexNormal(size_t idx) const noexcept {
  49                 return vertices[idx].normal;
  50         }
  51         glm::vec3 VertexNormal(size_t idx, const glm::mat4 &M) const noexcept {
  52                 return glm::vec3(M * glm::vec4(VertexNormal(idx), 0.0f));
  53         }
  54
  55         void Fill(
  56                 EntityMesh::Buffer &,
  57                 const std::vector<float> &tex_map
  58         ) const;
  59         void Fill(
  60                 EntityMesh::Buffer &,
  61                 const glm::mat4 &transform,
  62                 const std::vector<float> &tex_map
  63         ) const;
  64         void Fill(
  65                 BlockMesh::Buffer &,
  66                 const glm::mat4 &transform,
  67                 const std::vector<float> &tex_map,
  68                 std::size_t idx_offset = 0
  69         ) const;
  70
  71         size_t OutlineCount() const noexcept;
  72         size_t OutlineIndexCount() const noexcept;
  73         void Outline(PrimitiveMesh::Buffer &out) const;
  74
  75         bool Intersects(
  76                 const Ray &,
  77                 const glm::mat4 &,
  78                 float &dist,
  79                 glm::vec3 &normal
  80         ) const noexcept;
  81         bool Intersects(
  82                 const glm::mat4 &M,
  83                 const AABB &box,
  84                 const glm::mat4 &box_M,
  85                 float &depth,
  86                 glm::vec3 &normal
  87         ) const noexcept;
  88
  89 private:
  90         static float TexR(const std::vector<float> &, std::size_t) noexcept;
  91
  92 private:
  93         std::unique_ptr<CollisionBounds> bounds;
  94         struct Vertex {
  95                 glm::vec3 position;
  96                 glm::vec3 normal;
  97                 glm::vec2 tex_st;
  98                 std::size_t tex_id;
  99         };
 100         std::vector<Vertex> vertices;
 101         std::vector<std::size_t> indices;
 102         Faces fill;
 103
 104 };
 105
 106 }
 107
 108 #endif