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  1. using System;
  2.  
  3. public class Test
  4. {
  5. 	public static void Main()
  6. 	{
  7. 		// your code goes here
  8. 	}
  9.  
  10. 	// 関数：ノーマル生成
  11. 		private Bitmap GetNormal()
  12. 		{
  13. 			Bitmap bm = new Bitmap(WIDTH, HEIGHT);
  14.  
  15. 			// 傾斜の強度
  16. 			int x1 = int.Parse(comboBox1.SelectedItem.ToString()) * -1;
  17. 			int x2 = int.Parse(comboBox1.SelectedItem.ToString());
  18.  
  19. 			double dPre, dNow, dNex;
  20. 			double y1, y2;
  21. 			int result, r, g, b = 255;
  22. 			int[,] RN = new int[WIDTH, HEIGHT];
  23. 			int[,] GN = new int[WIDTH, HEIGHT];
  24.  
  25. 			// 端の1ピクセルの法線カラーは 127 の固定値に設定
  26. 			for (int i = 0; i < WIDTH; i++)
  27. 			{
  28. 				RN[i, 0] = 127;
  29. 				GN[i, 0] = 127;
  30. 				RN[i, HEIGHT - 1] = 127;
  31. 				GN[i, HEIGHT - 1] = 127;
  32. 			}
  33. 			for (int j = 0; j < HEIGHT; j++)
  34. 			{
  35. 				RN[0, j] = 127;
  36. 				GN[0, j] = 127;
  37. 				RN[WIDTH - 1, j] = 127;
  38. 				GN[WIDTH - 1, j] = 127;
  39. 			}
  40.  
  41. 			// 横方向で法線算出
  42. 			for (int j = 1; j < HEIGHT - 1; j++)
  43. 				for (int i = 1; i < WIDTH - 1; i++)
  44. 				{
  45. 					dPre	= pdataGray[i - 1, j];
  46. 					dNow	= pdataGray[i, j];
  47. 					dNex	= pdataGray[i + 1, j];
  48. 					y1 = dPre - dNow;
  49. 					y2 = dNex - dNow;
  50.  
  51. 					result = GetRadianFrom2Vec(x1, x2, y1, y2);
  52.  
  53. 					RN[i, j] = result;
  54. 				}
  55. 			// 縦方向で法線算出
  56. 			for (int j = 1; j < HEIGHT - 1; j++)
  57. 				for (int i = 1; i < WIDTH - 1; i++)
  58. 				{
  59. 					dPre = pdataGray[i, j - 1];
  60. 					dNow = pdataGray[i, j];
  61. 					dNex = pdataGray[i, j + 1];
  62. 					y1 = dPre - dNow;
  63. 					y2 = dNex - dNow;
  64.  
  65. 					result = GetRadianFrom2Vec(x1, x2, y1, y2);
  66.  
  67. 					GN[i, j] = result;
  68. 				}
  69.  
  70. 			// 法線カラーを適用
  71. 			for (int j = 0; j < HEIGHT; j++)
  72. 				for (int i = 0; i < WIDTH; i++)
  73. 				{
  74. 					r = 255 - RN[i, j];
  75. 					g = 255 - GN[i, j];
  76.  
  77. 					bm.SetPixel(i, j, Color.FromArgb(r, g, b));
  78. 				}
  79.  
  80. 			return bm;
  81. 		}
  82. 		// 関数：2つのベクトルのなす角度を求める
  83. 		private int GetRadianFrom2Vec(double x1, double x2, double y1, double y2)
  84. 		{
  85. 			double rad1, rad2, rad3;
  86. 			int result;
  87.  
  88. 			// X軸ベクトルとのなす角を求める
  89. 			rad1 = Math.Atan2(y1, x1);
  90. 			rad2 = Math.Atan2(y2, x2);
  91. 			// 結果がマイナスの場合にプラスに変換
  92. 			int i1 = Math.Sign(rad1);
  93. 			if (i1 == -1) rad1 += (Math.PI * 2);
  94.  
  95. 			// 90度の補正を入れる（傾斜を法線にするため）
  96. 			rad1 = rad1 - (Math.PI / 2);
  97. 			rad2 = rad2 + (Math.PI / 2);
  98.  
  99. 			// 最終的な角を求める
  100. 			rad3 = (rad1 + rad2) / 2;
  101.  
  102. 			// 1πラジアンが1になるよう補正
  103. 			rad3 = rad3 / Math.PI;
  104. 			// 8bitの値に変換
  105. 			result = (int)(rad3 * 255);
  106. 			result = Math.Max(0, result);
  107. 			result = Math.Min(255, result);
  108.  
  109. 			return (result);
  110. 		}
  111. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cs(11,11): error CS0246: The type or namespace name `Bitmap' could not be found. Are you missing `System.Drawing' using directive?
Compilation failed: 1 error(s), 0 warnings
stdout
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Standard output is empty
https://ideone.com/75BfFQ
language:
C# (gmcs 5.20.1)
created:
5 years ago
visibility:
public

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