42 lines
1.0 KiB
C#
42 lines
1.0 KiB
C#
using StgSharp.Math;
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namespace StgSharp.Geometries
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{
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public class Rectangle : Polygon4
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{
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internal Point center;
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public sealed override Point RefPoint01 => center;
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public sealed override Point RefPoint02 => vertex01;
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public sealed override Point RefPoint03 => vertex02;
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/// <summary>
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/// 计算中心点相对于参考原点的位移
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/// </summary>
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/// <param name="tick">当前游戏刻</param>
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/// <returns></returns>
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public virtual vec3d MovCenter(uint tick) => default(vec3d);
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public sealed override vec3d MovVertex03(uint tick)
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{
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return this.center.Position * 2 - this.vertex01.Position;
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}
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public sealed override vec3d MovVertex04(uint tick)
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{
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return this.center.Position * 2 - this.vertex02.Position;
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}
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internal sealed override void OnRender(uint tick)
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{
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tick -= bornTick;
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this.MovCenter(tick);
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}
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}
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}
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