Transform.hpp

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/*
   Copyright 2022 Rishi Challa
 
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
 
       http://www.apache.org/licenses/LICENSE-2.0
 
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
 
#pragma once
 
#include <Kale/Math/Matrix/Matrix.hpp>
#include <Kale/Math/RotatedRect/RotatedRect.hpp>
#include <Kale/Math/Rect/Rect.hpp>
#include <Kale/Math/Ray/Ray.hpp>
#include <Kale/Math/Line/Line.hpp>
#include <Kale/Math/Circle/Circle.hpp>
#include <Kale/Math/Utils/Utils.hpp>
 
#include <type_traits>
 
#include <nlohmann/json.hpp>
 
namespace Kale {
 
    using JSON = nlohmann::json;
 
    class Transform : public Matrix3f {
    public:
 
        Transform();
 
        Transform(const Matrix3f& matrix);
 
        Transform(Matrix3f&& matrix);
 
        Transform(const std::array<float, 9>& arr);
 
        Transform(std::array<float, 9>&& arr);
 
        Transform(const Vector2f& translation, float rotation, const Vector2f& scaleFactor, AngleUnit unit);
 
        Transform(float translateX, float translateY, float rotation, float scaleX, float scaleY, AngleUnit unit);
 
        void setIdentity();
 
        void scale(const Vector2f& vec);
 
        void scale(float x, float y);
 
        void scale(float factor);
 
        void scale(float factor, const Vector2f& origin);
 
        void scale(float x, float y, const Vector2f& origin);
 
        void translate(const Vector2f& vec);
 
        void translate(float x, float y);
 
        void rotate(float angle, AngleUnit unit);
 
        void rotate(float angle, AngleUnit unit, const Vector2f& origin);
 
        void setTranslation(float x, float y);
 
        void setTranslation(const Vector2f& vec);
 
        Vector2f getTranslation() const;
 
        void setRotation(float angle, AngleUnit unit);
 
        float getRotation(AngleUnit unit) const;
 
        void setScale(float scaleX, float scaleY);
 
        void setScale(float scale);
 
        Vector2f getScale() const;
 
        Vector2f transform(const Vector2f& vec) const;
 
        void transformInplace(Vector2f& vec) const;
 
        Vector2f inverseTransform(const Vector2f& vec) const;
 
        void inverseTransformInplace(Vector2f& vec) const;
 
        RotatedRect transform(const RotatedRect& rect) const;
 
        RotatedRect inverseTransform(const RotatedRect& rect) const;
 
        RotatedRect transform(const Rect& rect) const;
 
        RotatedRect inverseTransform(const Rect& rect) const;
        
        Ray transform(const Ray& ray) const;
        
        Ray inverseTransform(const Ray& ray) const;
        
        Line transform(const Line& line) const;
        
        Line inverseTransform(const Line& line) const;
        
        Circle transform(const Circle& circle) const;
        
        Circle inverseTransform(const Circle& circle) const;
 
        template <typename T> typename std::enable_if<std::is_base_of<Geometry, T>::value, bool>::type
        isInView(const T& geometry, const Rect& sceneBounds) {
            return geometry.rectCollision(transform(sceneBounds));
        }
 
    };
 
    typedef Transform Camera;
 
    inline void from_json(const JSON& j, Transform& p) {
        from_json(j, dynamic_cast<Matrix3f&>(p));
    }
 
    inline void to_json(JSON& j, const Transform& p) {
        to_json(j, dynamic_cast<const Matrix3f&>(p));
    }
 
}