[EDIT] code style guide - renderengine

src/renderEngine/obj_loader.cpp

@@ -0,0 +1,129 @@
+#include <fstream>
+#include <iostream>
+#include <vector>
+#include <sstream>
+#include <glm/gtc/matrix_transform.hpp>
+#include "loader.h"
+#include "obj_loader.h"
+
+static void Split(const std::string& s, char delim, std::vector<std::string>& elems)
+{
+    std::stringstream ss;
+    ss.str(s);
+    std::string item;
+    while (getline(ss, item, delim)) {
+        elems.push_back(item);
+    }
+}
+
+static std::vector<std::string> Split(const std::string& s, char delim)
+{
+    std::vector<std::string> elems;
+    Split(s, delim, elems);
+    return elems;
+}
+
+static void ProcessVertex(const std::vector<std::string>& vertex_data,
+    const std::vector<glm::vec3>& normals,
+    const std::vector<glm::vec2>& textures,
+    std::vector<GLuint>& indices,
+    std::vector<GLfloat>& texture_array,
+    std::vector<GLfloat>& normal_array)
+{
+    GLuint current_vertex_pointer = std::stoi(vertex_data.at(0)) - 1;
+    indices.push_back(current_vertex_pointer);
+
+    glm::vec2 current_texture = textures.at(std::stoi(vertex_data.at(1)) - 1);
+    texture_array[(current_vertex_pointer * 2) % texture_array.size()] = current_texture.x;
+    texture_array[(current_vertex_pointer * 2 + 1) % texture_array.size()] = 1 - current_texture.y;
+
+    glm::vec3 current_norm = normals.at(std::stoi(vertex_data.at(2)) - 1);
+    normal_array[current_vertex_pointer * 3] = current_norm.x;
+    normal_array[current_vertex_pointer * 3 + 1] = current_norm.y;
+    normal_array[current_vertex_pointer * 3 + 2] = current_norm.z;
+}
+
+models::RawModel LoadObjModel(std::string file_name)
+{
+    std::ifstream inFile (file_name);
+    if ( !inFile.is_open() ) 
+    {
+        throw std::runtime_error ( "Could not open model file " + file_name + ".obj!" );
+    }
+    std::vector<glm::vec3> vertices;
+    std::vector<glm::vec3> normals;
+    std::vector<glm::vec2> textures;
+    std::vector<GLuint> indices;
+    std::vector<GLfloat> vertex_array;
+    std::vector<GLfloat> normal_array;
+    std::vector<GLfloat> texture_array;
+    std::string line;
+	
+    try
+    {
+        while (std::getline(inFile, line))
+        {
+            std::vector<std::string> split_line = Split(line, ' ');
+            if (split_line.at(0) == "v")
+            {
+                glm::vec3 vertex;
+                vertex.x = std::stof(split_line.at(1));
+                vertex.y = std::stof(split_line.at(2));
+                vertex.z = std::stof(split_line.at(3));
+                vertices.push_back(vertex);
+            }
+            else if (split_line.at(0) == "vt")
+            {
+                glm::vec2 texture;
+                texture.x = std::stof(split_line.at(1));
+                texture.y = std::stof(split_line.at(2));
+                textures.push_back(texture);
+            }
+            else if (split_line.at(0) == "vn")
+            {
+                glm::vec3 normal;
+                normal.x = std::stof(split_line.at(1));
+                normal.y = std::stof(split_line.at(2));
+                normal.z = std::stof(split_line.at(3));
+                normals.push_back(normal);
+            }
+            else if (split_line.at(0) == "f")
+            {
+                normal_array = std::vector<GLfloat>(vertices.size() * 3);
+                texture_array = std::vector<GLfloat>(textures.size() * 2);
+                break;
+            }
+        }
+    	
+        while (true)
+        {
+            std::vector<std::string> split = Split(line, ' ');
+            std::vector<std::string> vertex1 = Split(split.at(1), '/');
+            std::vector<std::string> vertex2 = Split(split.at(2), '/');
+            std::vector<std::string> vertex3 = Split(split.at(3), '/');
+            ProcessVertex(vertex1, normals, textures, indices, texture_array, normal_array);
+            ProcessVertex(vertex2, normals, textures, indices, texture_array, normal_array);
+            ProcessVertex(vertex3, normals, textures, indices, texture_array, normal_array);
+            if (!std::getline(inFile, line))
+            {
+                break;
+            }
+        }
+    } catch (const std::exception& e)
+    {
+    	// Always go in here
+    }
+
+    inFile.close();
+	
+    vertex_array = std::vector<GLfloat>( vertices.size() * 3 );
+    int p = 0;
+    for ( auto& vertex : vertices ) 
+    {
+        vertex_array[p++] = vertex.x;
+        vertex_array[p++] = vertex.y;
+        vertex_array[p++] = vertex.z;
+    }
+
+    return render_engine::loader::LoadToVAO( vertex_array, texture_array, indices);
+}