70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include "Scene/Geometry.hpp"
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#include <utility>
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#include <string>
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#include <sstream>
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#include <fmt/core.h>
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namespace OpenVulkano::Scene
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{
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// Returns [objContents, mtlContents]
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std::pair<std::string, std::string> GetObjContents(Geometry* geometry, const std::string& texturePath)
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{
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std::pair<std::string, std::string> result;
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bool useTexture = texturePath.size() != 0;
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std::stringstream objContent;
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objContent << "# OBJ file generated by OpenVulkanoCpp\n";
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if (useTexture)
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{
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std::stringstream mtlContent;
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std::string materialName = "Material0";
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mtlContent << "newmtl " << materialName << R"(
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Ka 1.000 1.000 1.000
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Kd 1.000 1.000 1.000
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Ks 0.000 0.000 0.000
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map_Ka texture.png
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map_Kd texture.png
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)";
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objContent << "mtllib material.mtl\nusemtl " << materialName << "\n";
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result.second = mtlContent.str();
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}
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for (int i = 0; i < geometry->vertexCount; ++i)
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{
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const auto& v = geometry->vertices[i];
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objContent << fmt::format("v {} {} {}\n", v.position.x, v.position.y, v.position.z);
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}
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for (int i = 0; i < geometry->vertexCount; ++i)
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{
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const auto& v = geometry->vertices[i];
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objContent << fmt::format("vn {} {} {}\n", v.normal.x, v.normal.y, v.normal.z);
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}
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for (int i = 0; i < geometry->vertexCount; ++i)
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{
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const auto& v = geometry->vertices[i];
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objContent << fmt::format("vt {} {}\n", v.textureCoordinates.x, v.textureCoordinates.y);
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}
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for (int i = 0; i < geometry->indexCount; i += 3)
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{
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uint32_t i0 = geometry->GetIndex(i + 0) + 1;
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uint32_t i1 = geometry->GetIndex(i + 1) + 1;
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uint32_t i2 = geometry->GetIndex(i + 2) + 1;
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objContent << fmt::format("f {0}/{0}/{0} {1}/{1}/{1} {2}/{2}/{2}\n", i0, i1, i2);
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}
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result.first = objContent.str();
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return result;
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}
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} |