RotateMesh.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 "Axis.hpp"
#include "TransformMesh.hpp"
 
namespace CeresEngine::MeshGenerator {
 
    template<typename Mesh> class RotateMesh {
    private:
        using Impl = TransformMesh<Mesh>;
        Impl mTransformMesh;
 
    public:
        RotateMesh(Mesh mesh, const Quaternion& rotation)
                : mTransformMesh{std::move(mesh), [rotation](MeshVertex& value) {
                                     value.position = Math::transform(rotation, value.position);
                                     value.normal = Math::transform(rotation, value.normal);
                                 }} {}
 
        RotateMesh(Mesh mesh, const double angle, const Vector3& axis) : RotateMesh{std::move(mesh), qrotate(angle, axis)} {}
 
        RotateMesh(Mesh mesh, const double angle, const Axis axis)
                : RotateMesh{std::move(mesh),
                      qrotate(angle, axis == Axis::X ? Vector3{1.0, 0.0, 0.0} : (axis == Axis::Y ? Vector3{0.0, 1.0, 0.0} : Vector3{0.0, 0.0, 1.0}))} {}
 
        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> RotateMesh<Mesh> rotateMesh(Mesh mesh, const Quaternion& rotation) { return RotateMesh<Mesh>{std::move(mesh), rotation}; }
 
    template<typename Mesh> RotateMesh<Mesh> rotateMesh(Mesh mesh, double angle, const Vector3& axis) { return RotateMesh<Mesh>{std::move(mesh), angle, axis}; }
 
    template<typename Mesh> RotateMesh<Mesh> rotateMesh(Mesh mesh, double angle, Axis axis) { return RotateMesh<Mesh>{std::move(mesh), angle, axis}; }
 
} // namespace CeresEngine::MeshGenerator