| 1 | #include "FROG_Primitives.h"
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| 2 |
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| 3 | void SetNormal(float C1X, float C1Y, float C1Z,
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| 4 | float C2X, float C2Y, float C2Z,
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| 5 | float C3X, float C3Y, float C3Z){
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| 6 |
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| 7 | #ifdef FROG_LIGHTING
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| 8 | float X = (C1Y-C2Y)*(C2Z-C3Z) - (C1Z-C2Z)*(C2Y-C3Y);
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| 9 | float Y = (C1Z-C2Z)*(C2X-C3X) - (C1X-C2X)*(C2Z-C3Z);
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| 10 | float Z = (C1X-C2X)*(C2Y-C3Y) - (C1Y-C2Y)*(C2X-C3X);
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| 11 | float N = sqrt(X*X+Y*Y+Z*Z);
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| 12 | X /= N;Y /= N;Z /= N;
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| 13 |
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| 14 | glNormal3f(X,Y,Z);
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| 15 | #endif
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| 16 | }
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| 17 |
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| 18 | void DrawNormal(float C1X, float C1Y, float C1Z,
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| 19 | float C2X, float C2Y, float C2Z,
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| 20 | float C3X, float C3Y, float C3Z){
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| 21 | /*
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| 22 | glBegin (GL_TRIANGLES);
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| 23 | glVertex3f (C1X,C1Y,C1Z);
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| 24 | glVertex3f (C2X,C2Y,C2Z);
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| 25 | glVertex3f (C3X,C3Y,C3Z);
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| 26 | glEnd();
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| 27 | */
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| 28 | float X = (C1Y-C2Y)*(C2Z-C3Z) - (C1Z-C2Z)*(C2Y-C3Y);
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| 29 | float Y = (C1Z-C2Z)*(C2X-C3X) - (C1X-C2X)*(C2Z-C3Z);
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| 30 | float Z = (C1X-C2X)*(C2Y-C3Y) - (C1Y-C2Y)*(C2X-C3X);
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| 31 | float N = sqrt(X*X+Y*Y+Z*Z);
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| 32 | N /= 25;
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| 33 | X /= N;Y /= N;Z /= N;
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| 34 |
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| 35 | glColor3f(0,1,0);
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| 36 | glBegin (GL_LINES);
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| 37 | glVertex3f ((C1X+C2X+C3X)/3 ,(C1Y+C2Y+C3Y)/3 ,(C1Z+C2Z+C3Z)/3 ); //+++
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| 38 | glVertex3f ((C1X+C2X+C3X)/3+X,(C1Y+C2Y+C3Y)/3+Y,(C1Z+C2Z+C3Z)/3+Z); //+-+
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| 39 | glEnd();
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| 40 | }
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| 41 |
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| 42 | void DrawCube(float C1X, float C1Y, float C1Z,
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| 43 | float C2X, float C2Y, float C2Z,
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| 44 | float C3X, float C3Y, float C3Z,
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| 45 | float C4X, float C4Y, float C4Z,
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| 46 | float C5X, float C5Y, float C5Z,
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| 47 | float C6X, float C6Y, float C6Z,
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| 48 | float C7X, float C7Y, float C7Z,
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| 49 | float C8X, float C8Y, float C8Z){
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| 50 |
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| 51 | glBegin (GL_QUADS);
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| 52 | SetNormal(C1X,C1Y,C1Z,C4X,C4Y,C4Z,C3X,C3Y,C3Z);
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| 53 | glVertex3f (C1X,C1Y,C1Z); //+++
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| 54 | glVertex3f (C4X,C4Y,C4Z); //+-+
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| 55 | glVertex3f (C3X,C3Y,C3Z); //--+
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| 56 | glVertex3f (C2X,C2Y,C2Z); //-++
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| 57 |
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| 58 | SetNormal(C5X,C5Y,C5Z,C6X,C6Y,C6Z,C7X,C7Y,C7Z);
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| 59 | glVertex3f (C5X,C5Y,C5Z); //++-
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| 60 | glVertex3f (C6X,C6Y,C6Z); //-+-
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| 61 | glVertex3f (C7X,C7Y,C7Z); //---
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| 62 | glVertex3f (C8X,C8Y,C8Z); //+--
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| 63 |
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| 64 | SetNormal(C1X,C1Y,C1Z,C2X,C2Y,C2Z,C6X,C6Y,C6Z);
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| 65 | glVertex3f (C1X,C1Y,C1Z); //+++
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| 66 | glVertex3f (C2X,C2Y,C2Z); //-++
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| 67 | glVertex3f (C6X,C6Y,C6Z); //-+-
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| 68 | glVertex3f (C5X,C5Y,C5Z); //++-
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| 69 |
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| 70 | SetNormal(C4X,C4Y,C4Z,C8X,C8Y,C8Z,C7X,C7Y,C7Z);
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| 71 | glVertex3f (C4X,C4Y,C4Z); //+-+
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| 72 | glVertex3f (C8X,C8Y,C8Z); //+--
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| 73 | glVertex3f (C7X,C7Y,C7Z); //---
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| 74 | glVertex3f (C3X,C3Y,C3Z); //--+
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| 75 |
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| 76 | SetNormal(C1X,C1Y,C1Z,C5X,C5Y,C5Z,C8X,C8Y,C8Z);
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| 77 | glVertex3f (C1X,C1Y,C1Z); //+++
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| 78 | glVertex3f (C5X,C5Y,C5Z); //++-
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| 79 | glVertex3f (C8X,C8Y,C8Z); //+--
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| 80 | glVertex3f (C4X,C4Y,C4Z); //+-+
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| 81 |
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| 82 | SetNormal(C2X,C2Y,C2Z,C3X,C3Y,C3Z,C7X,C7Y,C7Z);
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| 83 | glVertex3f (C2X,C2Y,C2Z); //-++
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| 84 | glVertex3f (C3X,C3Y,C3Z); //--+
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| 85 | glVertex3f (C7X,C7Y,C7Z); //---
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| 86 | glVertex3f (C6X,C6Y,C6Z); //-+-
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| 87 | glEnd();
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| 88 |
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| 89 | /*
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| 90 | glEnable(GL_POLYGON_OFFSET_LINE);
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| 91 | glPolygonOffset(0,100);
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| 92 | glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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| 93 | glBegin (GL_QUADS);
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| 94 | SetNormal(C1X,C1Y,C1Z,C4X,C4Y,C4Z,C3X,C3Y,C3Z);
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| 95 | glVertex3f (C1X,C1Y,C1Z); //+++
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| 96 | glVertex3f (C4X,C4Y,C4Z); //+-+
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| 97 | glVertex3f (C3X,C3Y,C3Z); //--+
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| 98 | glVertex3f (C2X,C2Y,C2Z); //-++
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| 99 |
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| 100 | SetNormal(C5X,C5Y,C5Z,C6X,C6Y,C6Z,C7X,C7Y,C7Z);
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| 101 | glVertex3f (C5X,C5Y,C5Z); //++-
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| 102 | glVertex3f (C6X,C6Y,C6Z); //-+-
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| 103 | glVertex3f (C7X,C7Y,C7Z); //---
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| 104 | glVertex3f (C8X,C8Y,C8Z); //+--
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| 105 |
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| 106 | SetNormal(C1X,C1Y,C1Z,C2X,C2Y,C2Z,C6X,C6Y,C6Z);
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| 107 | glVertex3f (C1X,C1Y,C1Z); //+++
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| 108 | glVertex3f (C2X,C2Y,C2Z); //-++
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| 109 | glVertex3f (C6X,C6Y,C6Z); //-+-
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| 110 | glVertex3f (C5X,C5Y,C5Z); //++-
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| 111 |
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| 112 | SetNormal(C4X,C4Y,C4Z,C8X,C8Y,C8Z,C7X,C7Y,C7Z);
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| 113 | glVertex3f (C4X,C4Y,C4Z); //+-+
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| 114 | glVertex3f (C8X,C8Y,C8Z); //+--
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| 115 | glVertex3f (C7X,C7Y,C7Z); //---
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| 116 | glVertex3f (C3X,C3Y,C3Z); //--+
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| 117 |
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| 118 | SetNormal(C1X,C1Y,C1Z,C5X,C5Y,C5Z,C8X,C8Y,C8Z);
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| 119 | glVertex3f (C1X,C1Y,C1Z); //+++
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| 120 | glVertex3f (C5X,C5Y,C5Z); //++-
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| 121 | glVertex3f (C8X,C8Y,C8Z); //+--
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| 122 | glVertex3f (C4X,C4Y,C4Z); //+-+
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| 123 |
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| 124 | SetNormal(C2X,C2Y,C2Z,C3X,C3Y,C3Z,C7X,C7Y,C7Z);
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| 125 | glVertex3f (C2X,C2Y,C2Z); //-++
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| 126 | glVertex3f (C3X,C3Y,C3Z); //--+
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| 127 | glVertex3f (C7X,C7Y,C7Z); //---
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| 128 | glVertex3f (C6X,C6Y,C6Z); //-+-
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| 129 | glEnd();
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| 130 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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| 131 | */
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| 132 | }
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| 133 |
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