123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103 |
- /*!
- * \file src/Mesh.cpp
- * \brief OpenGL Mesh
- *
- * \author Mongoose
- */
-
- #include <map>
- #include <stdlib.h>
-
- #include "global.h"
- #include "TextureManager.h"
- #include "system/Window.h"
- #include "Mesh.h"
-
- Mesh::Mesh(const std::vector<RoomVertexTR2>& vert,
- const std::vector<RoomRectangleTR2>& rect,
- const std::vector<RoomTriangleTR2>& tri) {
- for (auto& t : rect) {
- indices.push_back(0);
- vertices.push_back(glm::vec3(vert.at(t.v1).x, vert.at(t.v1).y, vert.at(t.v1).z));
- vertices.push_back(glm::vec3(vert.at(t.v2).x, vert.at(t.v2).y, vert.at(t.v2).z));
- vertices.push_back(glm::vec3(vert.at(t.v3).x, vert.at(t.v3).y, vert.at(t.v3).z));
- vertices.push_back(glm::vec3(vert.at(t.v4).x, vert.at(t.v4).y, vert.at(t.v4).z));
- textures.push_back(t.texture);
- }
-
- for (auto& t : tri) {
- indices.push_back(1);
- vertices.push_back(glm::vec3(vert.at(t.v1).x, vert.at(t.v1).y, vert.at(t.v1).z));
- vertices.push_back(glm::vec3(vert.at(t.v2).x, vert.at(t.v2).y, vert.at(t.v2).z));
- vertices.push_back(glm::vec3(vert.at(t.v3).x, vert.at(t.v3).y, vert.at(t.v3).z));
- textures.push_back(t.texture);
- }
- }
-
- struct PackedVertex {
- glm::vec3 pos;
- glm::vec2 uv;
- unsigned int tex;
-
- PackedVertex(glm::vec3 p, glm::vec2 u, unsigned int t) : pos(p), uv(u), tex(t) { }
- bool operator<(const PackedVertex& v) const { return memcmp(this, &v, sizeof(PackedVertex)) > 0; }
- };
-
- static bool findSimilarVertex(PackedVertex& v,
- std::map<PackedVertex, unsigned short> m,
- unsigned short& s) {
- auto it = m.find(v);
- if (it == m.end())
- return false;
- else {
- s = it->second;
- return true;
- }
- }
-
- void Mesh::prepare() {
- std::vector<unsigned short> ind;
- std::vector<glm::vec3> vert;
- std::vector<unsigned int> tex;
-
- std::map<PackedVertex, unsigned short> vertexMap;
-
- int vertIndex = 0;
- for (int i = 0; i < indices.size(); i++) {
- unsigned int texture = getTextureManager().getTile(textures.at(i)).getTexture();
- for (int v = 0; v < ((indices.at(i) == 0) ? 4 : 3); v++) {
- glm::vec2 uv = getTextureManager().getTile(textures.at(i)).getUV(v);
- PackedVertex p(vertices.at(vertIndex + v), uv, texture);
- unsigned short s;
- if (findSimilarVertex(p, vertexMap, s)) {
- ind.push_back(s); // Vertex already cached
- } else {
- vertexMap[p] = vert.size();
- ind.push_back(vert.size());
- vert.push_back(p.pos);
- uvs.push_back(p.uv);
- tex.push_back(p.tex);
- }
- }
-
- if (indices.at(i) == 0) {
- ind.push_back(ind.at(ind.size() - 1));
- ind.push_back(ind.at(ind.size() - 3));
- }
-
- vertIndex += (indices.at(i) == 0) ? 4 : 3;
- }
-
- indices = ind;
- vertices = vert;
- textures = tex;
- }
-
- void Mesh::display(glm::mat4 model, glm::mat4 view, glm::mat4 projection) {
- glm::mat4 MVP = projection * view * model;
-
- // TODO handle different textures!
-
- Window::drawGL(vertices, uvs, indices, MVP, textures.at(0));
- }
|