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Copy pathObjLoader.h
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95 lines (84 loc) · 2.6 KB
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#pragma once
#include <vector>
#include <stdio.h>
#include <string>
#include <cstring>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
bool LoadFromFile(const char* path, std::vector<glm::vec3>& out_vertices, std::vector<glm::vec2>& out_uvs, std::vector<glm::vec3>& out_normals)
{
std::vector<unsigned int> vertexIndices, uvIndices, normalIndices;
std::vector<glm::vec3> temp_vertices;
std::vector<glm::vec2> temp_uvs;
std::vector<glm::vec3> temp_normals;
FILE* file = fopen( path, "r");
if (file == NULL)
{
printf("File not found!\n");
return false;
}
while (1)
{
char lineHeader[128];
int res = fscanf(file, "%s", lineHeader);
if (res == EOF)
{
break;
}
if (strcmp(lineHeader, "v") == 0)
{
glm::vec3 vertex;
fscanf(file, "%f %f %f\n", &vertex.x, &vertex.y, &vertex.z);
temp_vertices.push_back(vertex);
}else if (strcmp(lineHeader, "vt") == 0)
{
glm::vec2 uv;
fscanf(file, "%f %f\n", &uv.x, &uv.y);
//uv.y = -uv.y;
temp_uvs.push_back(uv);
}else if (strcmp(lineHeader, "vn") == 0)
{
glm::vec3 normal;
fscanf(file, "%f %f %f\n", &normal.x, &normal.y, &normal.z);
temp_normals.push_back(normal);
}else if(strcmp(lineHeader, "f") == 0)
{
unsigned int vertexIndex[3], uvIndex[3], normalIndex[3];
int matches = fscanf(file, "%d/%d/%d %d/%d/%d %d/%d/%d\n", &vertexIndex[0], &uvIndex[0], &normalIndex[0], &vertexIndex[1], &uvIndex[1], &normalIndex[1], &vertexIndex[2], &uvIndex[2], &normalIndex[2]);
if (matches != 9)
{
printf("Cannot read by our sample parser.\n");
return false;
}
// triangle one
vertexIndices.push_back(vertexIndex[0]);
vertexIndices.push_back(vertexIndex[1]);
vertexIndices.push_back(vertexIndex[2]);
uvIndices.push_back(uvIndex[0]);
uvIndices.push_back(uvIndex[1]);
uvIndices.push_back(uvIndex[2]);
normalIndices.push_back(normalIndex[0]);
normalIndices.push_back(normalIndex[1]);
normalIndices.push_back(normalIndex[2]);
}else
{
char stupidBuffer[1000];
fgets(stupidBuffer, 1000, file);
}
}
for (unsigned int i = 0; i < vertexIndices.size(); i++)
{
unsigned int vertexIndex = vertexIndices[i];
unsigned int uvIndex = uvIndices[i];
unsigned int normalIndex = normalIndices[i];
glm::vec3 vertex = temp_vertices[vertexIndex - 1];
glm::vec2 uv = temp_uvs[uvIndex - 1];
glm::vec3 normal = temp_normals[normalIndex - 1];
out_vertices.push_back(vertex);
out_uvs.push_back(uv);
out_normals.push_back(normal);
}
fclose(file);
return true;
}