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# Untitled

a guest Mar 13th, 2018 50 Never
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1. Point[] points = new Point[3] { left, top, right };
2.
3. DrawField();DrawCoordinateSystem();
4.
5. graph.FillPolygon(Brushes.ForestGreen, points);
6.
7. Point[] pointsCopy = (Point[]) points.Clone();
8.
9. x = A.x + (A.x - P0.x)
10. y = A.y + (A.y - P0.y)
11.
12. |B*P0.x + C*P0.y,  C|
13.       |C*P1.x - B*P1.y, -B|
14.  A.x = --------------------- ,
15.           -B*B - C*C
16.
17.       |B,  B*P0.x + C*P0.y|
18.       |C,  C*P1.y - B*P1.y|
19.  A.y = ---------------------
20.           -B*B - C*C
21.
22.  B = P2.x - P1.x
23.  C = P2.y - P1.y
24.
25. by = -ax - c
26. y = -a/b x - c/b
27.
28. Point A = new Point( -width, -(a / b) * -width - c / b );
29. Point B = new Point( width, -(a / b) * width - c / b );
30.
31. float[,] L = new float[2, 3] {
32.     { A.X, A.Y, 1 },
33.     { B.X, B.Y, 1 }
34. };
35.
36. float[,] X = new float[3, 3] {
37.     { points[0].X, points[0].Y, 1 },
38.     { points[1].X, points[1].Y, 1 },
39.     { points[2].X, points[2].Y, 1 }
40. };
41.
42. private static float[,] MultiplyMatrix(float[,] a, float[,] b)
43. {
44.     float[,] product = new float[a.GetLength(0), b.GetLength(1)];
45.
46.     for (int row = 0; row  product.GetLength(0); row++)
47.         for (int col = 0; col  product.GetLength(1); col++)
48.             // Multiply the row of A by the column of B
49.             for (int inner = 0; inner  a.GetLength(1); inner++)
50.                 product[row, col] += a[row, inner] * b[inner, col];
51.
52.     return product;
53. }
54.
55. float ys = -(a / b) * 0 - c / b;
56.
57. float[,] T = new float[3, 3] {
58.     { 1, 0, 0 },
59.     { 0, 1, 0 },
60.     { 0, -ys, 1 }
61. };
62.
63. L = MultiplyMatrix(L, T);
64. X = MultiplyMatrix(X, T);
65.
66. double radians = Math.Atan(-(a / b));
67.
68. float[,] R = new float[3, 3] {
71.     { 0, 0, 1 }
72. };
73.
74. L = MultiplyMatrix(L, R);
75. X = MultiplyMatrix(X, R);
76.
77. float[,] Rr = new float[3, 3] {
78.     { 1, 0, 0 },
79.     { 0, -1, 0 },
80.     { 0, 0, 1 }
81. };
82.
83. X = MultiplyMatrix(X, Rr);
84.
85. float[,] Rh = new float[3, 3] {
88.     { 0, 0, 1 }
89. };
90.
91. L = MultiplyMatrix(L, Rh);
92. X = MultiplyMatrix(X, Rh);
93.
94. float[,] Th = new float[3, 3] {
95.     { 1, 0, 0 },
96.     { 0, 1, 0 },
97.     { 0, ys, 1 }
98. };
99.
100. L = MultiplyMatrix(L, Th);
101. X = MultiplyMatrix(X, Th);
102.
103. for (int i = 0; i  p.Length; i++)
104. {
105.     points[i].X = X[i, 0];
106.     points[i].Y = X[i, 1];
107. }
108.
109. graph.FillPolygon(Brushes.RoyalBlue, points);
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