模型加载，基础功能缩放、平移、旋转

lixiaojun

2025-03-18 90c8d96d1c7f02dd10a114811a668915921b8834

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using OpenTK.Graphics.OpenGL;
using OpenTK.Mathematics;
 
namespace Yw.WinFrmUI.Hydro
{
    /// <summary>
    /// 绘制2d点辅助类
    /// </summary>
    internal class DrawPoint2dHelper
    {
        /// <summary>
        /// 绘制
        /// </summary>
        /// <param name="size">点大小</param>
        /// <param name="color">点颜色</param>
        /// <param name="pt">点位置</param>
        public static void Draw(float size, Color color, PointL3d pt)
        {
            GL.PointSize(size);
            GL.Begin(PrimitiveType.Points);
            GL.Color3(Color.Red);
            GL.Vertex3(pt.X, pt.Y, pt.Z);
            GL.End();
        }
 
        /// <summary>
        /// 绘制
        /// </summary>
        /// <param name="size">点大小</param>
        /// <param name="color">点颜色</param>
        /// <param name="pt">点位置</param>
        public static void Draw(float size, Color color, Vector3 pt)
        {
            GL.PointSize(size);
            GL.Begin(PrimitiveType.Points);
            GL.Color3(Color.Red);
            GL.Vertex3(pt.X, pt.Y, pt.Z);
            GL.End();
        }
 
    }
}