ShapeToPath.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 "PathVertex.hpp"
#include "ShapeVertex.hpp"
#include "Utility.hpp"
 
namespace CeresEngine::MeshGenerator {
 
    template<typename Shape> class ShapeToPath {
    private:
        using Impl = Shape;
        Impl mShape;
 
    public:
        class Vertices {
        public:
            PathVertex generate() const {
                const ShapeVertex shapeVertex = vertices_.generate();
 
                PathVertex vertex;
 
                vertex.position = Vector3(shapeVertex.position, 0.0);
 
                vertex.tangent = Vector3(shapeVertex.tangent, 0.0);
                vertex.normal = Vector3{0.0, 0.0, 1.0};
 
                vertex.texCoord = shapeVertex.texCoord;
 
                return vertex;
            }
 
            [[nodiscard]] bool done() const noexcept { return vertices_.done(); }
 
            void next() { vertices_.next(); }
 
        private:
            typename VertexGeneratorType<Shape>::Type vertices_;
 
            Vertices(const Shape& shape) : vertices_{shape.vertices()} {}
 
            friend class ShapeToPath;
        };
 
        ShapeToPath(Shape shape) : mShape{std::move(shape)} {}
 
        using Edges = typename Impl::Edges;
 
        [[nodiscard]] Edges edges() const noexcept { return mShape.edges(); }
 
        [[nodiscard]] Vertices vertices() const { return *this; }
    };
 
    template<typename Shape> ShapeToPath<Shape> shapeToPath(Shape shape) { return ShapeToPath<Shape>{std::move(shape)}; }
 
} // namespace CeresEngine::MeshGenerator