56 lines
1.4 KiB
C#
56 lines
1.4 KiB
C#
using StgSharp.Graphics;
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using StgSharp.Math;
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namespace StgSharp.Geometries
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{
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/// <summary>
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/// 平面几何体。包含三角形，对称四边形，自由多边形等。最多可由16个点参数定义。
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/// </summary>
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public abstract class PlainGeometry
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{
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protected FrameTimer time;
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internal PartialPlainCoordinate coordinate;
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internal Matrix2x4 textureFrame;
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public PartialPlainCoordinate ReferenceCoordinate
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{
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get => this.coordinate;
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}
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/// <summary>
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/// Tick time this geometry eas crested
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/// </summary>
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public uint BornTime => time;
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internal abstract int[] Indices { get; }
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public PlainGeometry(Form form)
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{
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time = new FrameTimer(form);
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}
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public PlainGeometry() { }
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internal abstract void UpdateCoordinate(uint tick);
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/// <summary>
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/// Get all sides of this <see cref="PlainGeometry"/>.
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/// </summary>
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/// <returns>A array contains all straight <see cref="Line"/>s of current geometry item.</returns>
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public abstract Line[] GetAllSides();
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/// <summary>
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/// Get a flat <see cref="Plain"/> cincide with current geometry.
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/// </summary>
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/// <returns></returns>
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public abstract Plain GetPlain();
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//public abstract Rectangle GetRenderFrame();
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}
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}
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