Magic_Game/easy2d/2d/Geometry.h

// Copyright (c) 2016-2018 Easy2D - Nomango
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include "include-forwards.h"
#include <d2d1.h>

namespace easy2d
{
	// <20><><EFBFBD>γ<EFBFBD><CEB3><EFBFBD>
	class E2D_API Geometry
		: public virtual Object
	{
		friend class Canvas;
		friend class GeometryNode;

	public:
		Geometry();

		virtual ~Geometry();

		// <20><>ȡ<EFBFBD><C8A1><EFBFBD>а<EFBFBD>Χ<EFBFBD><CEA7>
		Rect GetBoundingBox();

		// <20>ж<EFBFBD>ͼ<EFBFBD><CDBC><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		bool ContainsPoint(
			Point const& point
		);

		// <20><>ȡͼ<C8A1><CDBC>չ<EFBFBD><D5B9><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ֱ<EFBFBD>ߵij<DFB5><C4B3><EFBFBD>
		float GetLength();

		// <20><><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC>·<EFBFBD><C2B7><EFBFBD>ϵ<EFBFBD><CFB5><EFBFBD>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		bool ComputePointAt(
			float length,
			Point* point,
			Point* tangent
		);

		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		float ComputeArea();

	protected:
		ComPtr<ID2D1Geometry> geo_;
	};


	// ֱ<><D6B1>
	class E2D_API LineGeometry
		: public Geometry
	{
	public:
		LineGeometry();

		LineGeometry(
			Point const& begin,
			Point const& end
		);

		virtual ~LineGeometry();

		Point const& GetBegin() const { return begin_; }

		Point const& GetEnd() const { return end_; }

		void SetLine(
			Point const& begin,
			Point const& end
		);

		void SetBegin(
			Point const& begin
		);

		void SetEnd(
			Point const& end
		);

	protected:
		Point begin_;
		Point end_;
	};


	// <20><><EFBFBD>ξ<EFBFBD><CEBE><EFBFBD>
	class E2D_API RectangleGeometry
		: public Geometry
	{
	public:
		RectangleGeometry();

		RectangleGeometry(
			Rect const& rect
		);

		RectangleGeometry(
			Point const& left_top,
			Size const& size
		);

		virtual ~RectangleGeometry();

		Rect const& GetRect() const { return rect_; }

		void SetRect(Rect const& rect);

	protected:
		Rect rect_;
	};


	// <20><><EFBFBD><EFBFBD>Բ<EFBFBD><D4B2>
	class E2D_API CircleGeometry
		: public Geometry
	{
	public:
		CircleGeometry();

		CircleGeometry(
			Point const& center,
			float radius
		);

		virtual ~CircleGeometry();

		float GetRadius() const { return radius_; }

		void SetRadius(
			float radius
		);

		Point const& GetCenter() const { return center_; }

		void SetCenter(
			Point const& center
		);

		void SetCircle(
			Point const& center,
			float radius
		);

	protected:
		Point center_;
		float radius_;
	};


	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ
	class E2D_API EllipseGeometry
		: public Geometry
	{
	public:
		EllipseGeometry();

		EllipseGeometry(
			Point const& center,
			float radius_x,
			float radius_y
		);

		virtual ~EllipseGeometry();

		float GetRadiusX() const { return radius_x_; }

		float GetRadiusY() const { return radius_y_; }

		void SetRadius(
			float radius_x,
			float radius_y
		);

		Point const& GetCenter() const { return center_; }

		void SetCenter(
			Point const& center
		);

		void SetEllipse(
			Point const& center,
			float radius_x,
			float radius_y
		);

	protected:
		Point center_;
		float radius_x_;
		float radius_y_;
	};


	// <20><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
	class E2D_API PathGeometry
		: public Geometry
	{
	public:
		PathGeometry();

		virtual ~PathGeometry();

		// <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		void BeginPath(
			Point const& begin_pos = Point{}	/* <20><>ʼ<EFBFBD><CABC> */
		);

		// <20><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		void EndPath(
			bool closed = true		/* ·<><C2B7><EFBFBD>Ƿ<EFBFBD><C7B7>պ<EFBFBD> */
		);

		// <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>߶<EFBFBD>
		void AddLine(
			Point const& point		/* <20>˵<EFBFBD> */
		);

		// <20><><EFBFBD>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD>߶<EFBFBD>
		void AddLines(
			Array<Point> const& points
		);

		// <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>η<EFBFBD><CEB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		void AddBezier(
			Point const& point1,	/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵ<DFB5>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD> */
			Point const& point2,	/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵڶ<C4B5><DAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD> */
			Point const& point3		/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD><DFB5>յ<EFBFBD> */
		);

		// <20><><EFBFBD>ӻ<EFBFBD><D3BB><EFBFBD>
		void AddArc(
			Point const& point,		/* <20>յ<EFBFBD> */
			Size const& radius,		/* <20><>Բ<EFBFBD>뾶 */
			float rotation,			/* <20><>Բ<EFBFBD><D4B2>ת<EFBFBD>Ƕ<EFBFBD> */
			bool clockwise = true,	/* ˳ʱ<CBB3><CAB1> or <20><>ʱ<EFBFBD><CAB1> */
			bool is_small = true	/* <20>Ƿ<EFBFBD>ȡС<C8A1><D0A1> 180<38><30> <20>Ļ<EFBFBD> */
		);

		// <20><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		void ClearPath();

	protected:
		ComPtr<ID2D1PathGeometry>	current_geometry_;
		ComPtr<ID2D1GeometrySink>	current_sink_;
	};


	// <20><><EFBFBD><EFBFBD>Բ<EFBFBD>Ǿ<EFBFBD><C7BE><EFBFBD>
	class E2D_API RoundedRectGeometry
		: public Geometry
	{
	public:
		RoundedRectGeometry();

		RoundedRectGeometry(
			Rect const& rect,
			float radius_x,
			float radius_y
		);

		virtual ~RoundedRectGeometry();

		float GetRadiusX() const { return radius_x_; }

		float GetRadiusY() const { return radius_y_; }

		void SetRadius(
			float radius_x,
			float radius_y
		);

		Rect const& GetRect() const { return rect_; }

		void SetRect(
			Rect const& rect
		);

		void SetRoundedRect(
			Rect const& rect,
			float radius_x,
			float radius_y
		);

	protected:
		Rect	rect_;
		float	radius_x_;
		float	radius_y_;
	};
}