Simulant  21.12-194
A portable game engine for Windows, OSX, Linux, Dreamcast, and PSP
adjacency_info.h
1 #pragma once
2 
3 #include <vector>
4 #include <functional>
5 #include "../math/vec3.h"
6 
7 namespace smlt {
8 
9 class Mesh;
10 
11 
12 /*
13  * Describes an edge between two vertices that may be shared with up to 2 triangles.
14  *
15  * If an edge is shared by more than two triangles in a mesh then this struct will only
16  * store up to two, ignoring any others. The mesh would be weird if this was the case.
17  */
18 struct EdgeInfo {
19  uint32_t indexes[2]; // The indexes that make this edge
20  uint32_t triangle_indexes[2]; // The indexes to additional vertices that make triangles
21  uint8_t triangle_count; // Either 0, 1, 2
22  smlt::Vec3 normals[2]; // Triangle normals
23 };
24 
26 public:
27  AdjacencyInfo(Mesh* mesh);
28  void rebuild();
29 
30  uint32_t edge_count() const { return edges_.size(); }
31  void each_edge(const std::function<void (std::size_t, const EdgeInfo &)> &cb);
32 private:
33  Mesh* mesh_ = nullptr;
34  std::vector<EdgeInfo> edges_;
35 
36 };
37 
38 }
smlt::Vec3
Definition: vec3.h:23
smlt
Definition: animation.cpp:25
smlt::Mesh
Definition: mesh.h:127
smlt::AdjacencyInfo
Definition: adjacency_info.h:25
smlt::EdgeInfo
Definition: adjacency_info.h:18