using OpenTK.Graphics.OpenGL;
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namespace Yw.WinFrmUI.Hydro
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{
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/// <summary>
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/// 绘制水源2d辅助类
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/// </summary>
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internal static class DrawSource2dExtensions
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{
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/// <summary>
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/// 绘制水源
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/// </summary>
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public static void Draw2d(this SourceL3d source, float zoom)
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{
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var radiu = source.Style2d.Normal.Radiu;
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var color = source.Style2d.Normal.Color;
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if (source.IsSelected)
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{
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radiu = source.Style2d.Selected.Radiu;
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color = source.Style2d.Selected.Color;
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}
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if (source.IsHovered)
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{
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radiu = source.Style2d.Hovered.Radiu;
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color = source.Style2d.Hovered.Color;
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}
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radiu *= zoom;
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float z = source.Position.Z;
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//计算水池下方矩形的四个顶点相对于中心点的坐标
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float left_b = source.Position.X - radiu * 1f;
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float right_b = source.Position.X + radiu * 1f;
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float bottom_b = source.Position.Y - radiu * 1.5f;
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float top_b = source.Position.Y;
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float left_t = source.Position.X - radiu * 2f;
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float right_t = source.Position.X + radiu * 2f;
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float bottom_t = source.Position.Y;
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float top_t = source.Position.Y + radiu * 1.5f;
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GL.Color3(color);
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// 绘制下方矩形
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GL.Begin(PrimitiveType.Quads);
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GL.Vertex3(left_b, bottom_b, z);
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GL.Vertex3(right_b, bottom_b, z);
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GL.Vertex3(right_b, top_b, z);
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GL.Vertex3(left_b, top_b, z);
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GL.End();
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// 绘制水池中的水
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GL.Begin(PrimitiveType.Quads);
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GL.Vertex3(left_t, bottom_t, z);
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GL.Vertex3(right_t, bottom_t, z);
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GL.Vertex3(right_t, top_t, z);
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GL.Vertex3(left_t, top_t, z);
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GL.End();
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}
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}
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}
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