我们模拟从被观察物体射出光线，在眼球焦点交汇，然后打到视网膜上成像
——足够了吧，剩下的难度应该是普及-
只是有一些常数可以自己调一下，看着顺眼就好
1 #include <graphics.h> 2 #include <cstdio> 3 VECTOR3D a; 4 VECTOR3D b; 5 VECTOR3D c; 6 VECTOR3D d; 7 VECTOR3D a1; 8 VECTOR3D b1; 9 VECTOR3D c1; 10 VECTOR3D d1; 11 float k=0; 12 #define fudu 0.1 13 #define len 1 14 #define lenz 20 15 #define ox 300 16 #define oy 300 17 int one=500; 18 float sdx(VECTOR3D a) 19 { 20 return (ox+one*a.x/(a.z+lenz)*len); 21 } 22 float sdy(VECTOR3D a) 23 { 24 return (oy+one*a.y/(a.z+lenz)*len); 25 } 26 void li(VECTOR3D a,VECTOR3D b) 27 { 28 line_f(sdx(a),sdy(a),sdx(b),sdy(b)); 29 } 30 void mia(VECTOR3D a,VECTOR3D b,VECTOR3D c) 31 { 32 int mian[]= 33 { 34 sdx(a),sdy(a), 35 sdx(b),sdy(b), 36 sdx(c),sdy(c), 37 }; 38 fillpoly(3,mian); 39 } 40 void print() 41 { 42 cleardevice(); 43 setcolor(0xFFFFFF); 44 setfillcolor(0x9999FF); 45 mia(a,b,c); 46 mia(a,b,d); 47 mia(a,c,d); 48 mia(d,b,c); 49 mia(a1,b1,c1); 50 mia(a1,b1,d1); 51 mia(a1,c1,d1); 52 mia(d1,b1,c1); 53 li(a,b); 54 li(b,c); 55 li(c,d); 56 li(d,a); 57 li(a,c); 58 li(b,d); 59 li(a1,b1); 60 li(b1,c1); 61 li(c1,d1); 62 li(d1,a1); 63 li(a1,c1); 64 li(b1,d1); 65 delay_ms(0); 66 } 67 void change() 68 { 69 char ch=getch(); 70 if(ch=='w') 71 { 72 a.Rotate(fudu,1,0,0); 73 b.Rotate(fudu,1,0,0); 74 c.Rotate(fudu,1,0,0); 75 d.Rotate(fudu,1,0,0); 76 a1.Rotate(fudu,1,0,0); 77 b1.Rotate(fudu,1,0,0); 78 c1.Rotate(fudu,1,0,0); 79 d1.Rotate(fudu,1,0,0); 80 } 81 else 82 if(ch=='s') 83 { 84 a.Rotate(fudu,-1,0,0); 85 b.Rotate(fudu,-1,0,0); 86 c.Rotate(fudu,-1,0,0); 87 d.Rotate(fudu,-1,0,0); 88 a1.Rotate(fudu,-1,0,0); 89 b1.Rotate(fudu,-1,0,0); 90 c1.Rotate(fudu,-1,0,0); 91 d1.Rotate(fudu,-1,0,0); 92 } 93 else 94 if(ch=='a') 95 { 96 a.Rotate(fudu,0,1,0); 97 b.Rotate(fudu,0,1,0); 98 c.Rotate(fudu,0,1,0); 99 d.Rotate(fudu,0,1,0); 100 a1.Rotate(fudu,0,1,0); 101 b1.Rotate(fudu,0,1,0); 102 c1.Rotate(fudu,0,1,0); 103 d1.Rotate(fudu,0,1,0); 104 } 105 else 106 if(ch=='d') 107 { 108 a.Rotate(fudu,0,-1,0); 109 b.Rotate(fudu,0,-1,0); 110 c.Rotate(fudu,0,-1,0); 111 d.Rotate(fudu,0,-1,0); 112 a1.Rotate(fudu,0,-1,0); 113 b1.Rotate(fudu,0,-1,0); 114 c1.Rotate(fudu,0,-1,0); 115 d1.Rotate(fudu,0,-1,0); 116 } 117 else 118 if(ch==' ') 119 { 120 a.Rotate(fudu,0,0,1); 121 b.Rotate(fudu,0,0,1); 122 c.Rotate(fudu,0,0,1); 123 d.Rotate(fudu,0,0,1); 124 a1.Rotate(fudu,0,0,1); 125 b1.Rotate(fudu,0,0,1); 126 c1.Rotate(fudu,0,0,1); 127 d1.Rotate(fudu,0,0,1); 128 } 129 else 130 if(ch=='[') 131 one-=10; 132 else 133 if(ch==']') 134 one+=10; 135 } 136 int main() 137 { 138 printf("wasd旋转[]缩放"); 139 delay(1000); 140 initgraph(ox*2,oy*2); 141 setrendermode(RENDER_MANUAL); 142 a.x=0; 143 a.y=2; 144 a.z=-1.4142135623730950488016887242097/2; 145 b.x=0; 146 b.y=0; 147 b.z=1.4142135623730950488016887242097*1.5; 148 c.x=-1.7320508075688772935274463415059; 149 c.y=-1; 150 c.z=-1.4142135623730950488016887242097/2; 151 d.x=1.7320508075688772935274463415059; 152 d.y=-1; 153 d.z=-1.4142135623730950488016887242097/2; 154 a1.x=1.7320508075688772935274463415059; 155 a1.y=1; 156 a1.z=1.4142135623730950488016887242097/2; 157 b1.x=-1.7320508075688772935274463415059; 158 b1.y=1; 159 b1.z=1.4142135623730950488016887242097/2; 160 c1.x=0; 161 c1.y=-2; 162 c1.z=1.4142135623730950488016887242097/2; 163 d1.x=0; 164 d1.y=0; 165 d1.z=-1.4142135623730950488016887242097*1.5; 166 print(); 167 while(1) 168 { 169 change(); 170 print(); 171 } 172 }
画了一个梅塔特隆立方体玩玩，看着应该比较顺眼
