UvFlipMesh.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2022 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "TransformMesh.hpp"
 
namespace CeresEngine::MeshGenerator {
 
    template<typename Mesh> class UvFlipMesh {
    private:
        using Impl = TransformMesh<Mesh>;
        Impl mTransformMesh;
 
    public:
        UvFlipMesh(Mesh mesh, bool u, bool v)
                : mTransformMesh{std::move(mesh), [u, v](MeshVertex& vertex) {
                                     if(u)
                                         vertex.texCoord[0] = 1.0 - vertex.texCoord[0];
                                     if(v)
                                         vertex.texCoord[1] = 1.0 - vertex.texCoord[1];
                                 }} {}
 
        using Triangles = typename Impl::Triangles;
 
        [[nodiscard]] Triangles triangles() const noexcept { return mTransformMesh.triangles(); }
 
        using Vertices = typename Impl::Vertices;
 
        [[nodiscard]] Vertices vertices() const noexcept { return mTransformMesh.vertices(); }
    };
 
    template<typename Mesh> UvFlipMesh<Mesh> uvFlipMesh(Mesh mesh) { return UvFlipMesh<Mesh>{std::move(mesh)}; }
 
} // namespace CeresEngine::MeshGenerator