107 lines
No EOL
3.3 KiB
C++
107 lines
No EOL
3.3 KiB
C++
#include "Mesh.h"
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agl::Mesh::Mesh(char *filename) {
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loadFromFile(filename);
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}
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int agl::Mesh::loadFromFile(char *filename) {
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char line[1024], *giblet;
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int bytesRead, count = 0, type = 0;
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std::string aids;
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FILE *fp = fopen(filename, "rb");
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glm::vec3 tmpv;
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Index tmpix[3];
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while(!feof(fp)) {
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fgets(line, 1024, fp);
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if(line[0] == 'v' && line[1] == ' ') {
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sscanf(line, "%*s %f %f %f", &tmpv.x, &tmpv.y, &tmpv.z);
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vertices.push_back(tmpv);
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} else if(line[0] == 'v' && line[1] == 'n') {
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sscanf(line, "%*s %f %f %f", &tmpv.x, &tmpv.y, &tmpv.z);
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normals.push_back(tmpv);
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} else if(line[0] == 'v' && line[1] == 't') {
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sscanf(line, "%*s %f %f", &tmpv.x, &tmpv.y);
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textices.push_back(glm::vec2(tmpv));
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} else if(line[0] == 'f' && line[1] == ' ') {
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sscanf(line, "%*s %i/%i/%i %i/%i/%i %i/%i/%i", &tmpix[0].vertexIndex, &tmpix[0].texIndex, &tmpix[0].normalIndex, &tmpix[1].vertexIndex, &tmpix[1].texIndex, &tmpix[1].normalIndex, &tmpix[2].vertexIndex, &tmpix[2].texIndex, &tmpix[2].normalIndex);
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indices.push_back(tmpix[0]);
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indices.push_back(tmpix[1]);
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indices.push_back(tmpix[2]);
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} else continue;
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}
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fclose(fp);
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vertexData = new float[indices.size()*3];
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normalData = new float[indices.size()*3];
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texData = new float[indices.size()*2];
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for(int i = 0; i < indices.size(); i++) {
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vertexData[i*3] = vertices[indices[i].vertexIndex - 1].x;
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vertexData[i*3+1] = vertices[indices[i].vertexIndex - 1].y;
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vertexData[i*3+2] = vertices[indices[i].vertexIndex - 1].z;
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normalData[i*3] = normals[indices[i].normalIndex - 1].x;
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normalData[i*3+1] = normals[indices[i].normalIndex - 1].y;
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normalData[i*3+2] = normals[indices[i].normalIndex - 1].z;
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texData[i*2] = textices[indices[i].texIndex - 1].x;
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texData[i*2+1] = textices[indices[i].texIndex - 1].y;
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}
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glGenBuffers(1, &vbuf);
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glBindBuffer(GL_ARRAY_BUFFER, vbuf);
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glBufferData(GL_ARRAY_BUFFER, (indices.size()*3)*sizeof(float), vertexData, GL_STATIC_DRAW);
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glGenBuffers(1, &nbuf);
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glBindBuffer(GL_ARRAY_BUFFER, nbuf);
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glBufferData(GL_ARRAY_BUFFER, (indices.size()*3)*sizeof(float), normalData, GL_STATIC_DRAW);
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glGenBuffers(1, &tbuf);
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glBindBuffer(GL_ARRAY_BUFFER, tbuf);
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glBufferData(GL_ARRAY_BUFFER, (indices.size()*2)*sizeof(float), texData, GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glGenVertexArrays(1, &vao);
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glBindVertexArray(vao);
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glEnableVertexAttribArray(0);
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glBindBuffer(GL_ARRAY_BUFFER, vbuf);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
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glEnableVertexAttribArray(1);
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glBindBuffer(GL_ARRAY_BUFFER, nbuf);
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
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glEnableVertexAttribArray(2);
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glBindBuffer(GL_ARRAY_BUFFER, tbuf);
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glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 0, (void*)0);
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glBindVertexArray(0);
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rnum = indices.size();
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return 0;
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}
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void agl::Mesh::Render() {
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glBindVertexArray(vao);
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glDrawArrays(GL_TRIANGLES, 0, rnum);
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glBindVertexArray(0);
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}
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void agl::Mesh::test() {
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printf("VERTICES:\n");
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for(int i = 0; i < rnum*3; i+=3)
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printf("(%f, %f, %f)\n", vertexData[i], vertexData[i+1], vertexData[i+2]);
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printf("\nNORMALS:\n");
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for(int i = 0; i < rnum*3; i+=3)
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printf("(%f, %f, %f)\n", normalData[i], normalData[i+1], normalData[i+2]);
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printf("\nTEXTICES:\n");
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for(int i = 0; i < rnum*2; i+=2)
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printf("(%f, %f)\n", texData[i], texData[i+1]);
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}
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agl::Mesh::~Mesh() {
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} |