mirror of
https://github.com/RGBCube/serenity
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129 lines
4.6 KiB
C++
129 lines
4.6 KiB
C++
/*
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
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* Copyright (c) 2021, Mathieu Gaillard <gaillard.mathieu.39@gmail.com>
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* Copyright (c) 2021, Pedro Pereira <pmh.pereira@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "WavefrontOBJLoader.h"
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#include <LibCore/File.h>
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#include <stdlib.h>
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RefPtr<Mesh> WavefrontOBJLoader::load(Core::File& file)
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{
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Vector<Vertex> vertices;
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Vector<Vertex> normals;
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Vector<TexCoord> tex_coords;
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Vector<Triangle> triangles;
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dbgln("Wavefront: Loading {}...", file.name());
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// Start reading file line by line
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for (auto object_line : file.lines()) {
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// Ignore file comments
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if (object_line.starts_with("#"))
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continue;
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if (object_line.starts_with("vt")) {
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auto tex_coord_line = object_line.split_view(' ');
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if (tex_coord_line.size() != 3) {
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dbgln("Wavefront: Malformed TexCoord line. Aborting.");
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dbgln("{}", object_line);
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return nullptr;
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}
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tex_coords.append({ static_cast<GLfloat>(atof(String(tex_coord_line.at(1)).characters())),
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static_cast<GLfloat>(atof(String(tex_coord_line.at(2)).characters())) });
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continue;
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}
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if (object_line.starts_with("vn")) {
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auto normal_line = object_line.split_view(' ');
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if (normal_line.size() != 4) {
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dbgln("Wavefront: Malformed vertex normal line. Aborting.");
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return nullptr;
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}
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normals.append({ static_cast<GLfloat>(atof(String(normal_line.at(1)).characters())),
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static_cast<GLfloat>(atof(String(normal_line.at(2)).characters())),
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static_cast<GLfloat>(atof(String(normal_line.at(3)).characters())) });
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continue;
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}
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// This line describes a vertex (a position in 3D space)
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if (object_line.starts_with("v")) {
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auto vertex_line = object_line.split_view(' ');
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if (vertex_line.size() != 4) {
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dbgln("Wavefront: Malformed vertex line. Aborting.");
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return nullptr;
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}
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vertices.append({ static_cast<GLfloat>(atof(String(vertex_line.at(1)).characters())),
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static_cast<GLfloat>(atof(String(vertex_line.at(2)).characters())),
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static_cast<GLfloat>(atof(String(vertex_line.at(3)).characters())) });
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continue;
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}
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// This line describes a face (a collection of 3 vertices, aka a triangle)
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if (object_line.starts_with("f")) {
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auto face_line = object_line.split_view(' ');
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if (face_line.size() != 4) {
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dbgln("Wavefront: Malformed face line. Aborting.");
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return nullptr;
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}
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GLuint vert_index[3];
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GLuint tex_coord_index[3];
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GLuint normal_index[3];
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if (object_line.contains("/")) {
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for (int i = 1; i <= 3; ++i) {
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auto vertex_data = face_line.at(i).split_view("/", true);
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vert_index[i - 1] = vertex_data.at(0).to_uint().value_or(1);
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tex_coord_index[i - 1] = vertex_data.at(1).to_uint().value_or(1);
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if (vertex_data.size() == 3)
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normal_index[i - 1] = vertex_data.at(2).to_uint().value_or(1);
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else
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normal_index[i - 1] = 1;
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}
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} else {
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vert_index[0] = (face_line.at(1).to_uint().value_or(1));
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vert_index[1] = (face_line.at(2).to_uint().value_or(1));
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vert_index[2] = (face_line.at(3).to_uint().value_or(1));
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tex_coord_index[0] = 0;
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tex_coord_index[1] = 0;
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tex_coord_index[2] = 0;
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normal_index[0] = 0;
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normal_index[1] = 0;
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normal_index[2] = 0;
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}
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// Create a new triangle
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triangles.append(
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{
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vert_index[0] - 1,
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vert_index[1] - 1,
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vert_index[2] - 1,
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tex_coord_index[0] - 1,
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tex_coord_index[1] - 1,
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tex_coord_index[2] - 1,
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normal_index[0] - 1,
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normal_index[1] - 1,
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normal_index[2] - 1,
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});
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}
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}
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if (vertices.is_empty()) {
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dbgln("Wavefront: Failed to read any data from 3D file: {}", file.name());
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return nullptr;
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}
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dbgln("Wavefront: Done.");
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return adopt_ref(*new Mesh(vertices, tex_coords, normals, triangles));
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}
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