cscの作法 その580

概要

cscの作法、調べてみた。
OpenRCF v2.8、見つけたので、windows11で、MSbuildしてみた。
練習問題やってみた。

練習問題

objの文字列から、プリミティブを作れ。

写真

サンプルコード

	class Obj {
		private float radius = 0.5f;
		private float[][] Vertex = new float[12][];
		private static class BaseVertex {
			public static float[][] Vertex = new float[12][];
			static BaseVertex() {
				string code = @"
v -1 -1 0
v  1 -1 0
v  1  1 0
v -1  1 0
v  0  0 1

f 5 1 2
f 5 2 3
f 5 3 4
f 5 4 1
";
				code = code.Replace("  ", " ");
				string[] lines = code.Split(new string[] {
					"\n"
				}, StringSplitOptions.None);
				int n = 0;
				int t = 0;
				float[,] v = new float[5, 3];
				float[,] f = new float[12, 3];
				for (int i = 0; i < lines.Length; i++)
				{
					string[] spline = lines[i].Split(new string[] {
						" "
					}, StringSplitOptions.None);
					switch (spline[0])
					{
					case "v":
						v[n, 0] = float.Parse(spline[1]);
						v[n, 1] = float.Parse(spline[2]);
						v[n, 2] = float.Parse(spline[3]);
						n++;
					break;
					case "f":
						f[t, 0] = v[int.Parse(spline[1]) - 1, 0];
						f[t, 1] = v[int.Parse(spline[1]) - 1, 1];
						f[t, 2] = v[int.Parse(spline[1]) - 1, 2];
						f[t + 1, 0] = v[int.Parse(spline[2]) - 1, 0];
						f[t + 1, 1] = v[int.Parse(spline[2]) - 1, 1];
						f[t + 1, 2] = v[int.Parse(spline[2]) - 1, 2];
						f[t + 2, 0] = v[int.Parse(spline[3]) - 1, 0];
						f[t + 2, 1] = v[int.Parse(spline[3]) - 1, 1];
						f[t + 2, 2] = v[int.Parse(spline[3]) - 1, 2];
						t = t + 3;
					break;
					default:
					break;
					}
				}
				for (int i = 0; i < 12; i++)
				{
					Vertex[i] = new float[3] { f[i, 2],  f[i, 1], f[i, 0] };
				}
			}
		}
		public Vector Position = new Vector(3);
		public RotationMatrix Rotate = new RotationMatrix();
		public Color Color = new Color();
		public float Size = 0.5f;
		public float Radius {
			get {
				return radius;
			}
			set {
				radius = value;
			}
		}
		public Obj(float size = 0.5f) {
			Size = size;
		}
		public void Draw() {
			VertexUpdate();
			Color.EnableBodyColor();
			DrawVertex(PrimitiveType.Polygon);
		}
		private void DrawVertex(PrimitiveType primitiveType) {
			GL.Begin(primitiveType);
			GL.Normal3(Rotate[0, 2], Rotate[1, 2], Rotate[2, 2]);
			for (int i = 0; i < Vertex.GetLength(0); i++)
			{
				GL.Vertex3(Vertex[i]);
			}
			GL.End();
		}
		private void VertexUpdate() {
			float[] vector = new float[3];
			for (int i = 0; i < Vertex.GetLength(0); i++)
			{
				vector[0] = Size * BaseVertex.Vertex[i][0];
				vector[1] = Size * BaseVertex.Vertex[i][1];
				vector[2] = Size * BaseVertex.Vertex[i][2];
				Vertex[i] = Position.Plus(Rotate * vector);
			}
		}
	}

以上。