【水】基于ege的简单3D模拟

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

 #include <graphics.h>
 #include <cstdio>
     VECTOR3D a;
     VECTOR3D b;
     VECTOR3D c;
     VECTOR3D d;
     VECTOR3D a1;
     VECTOR3D b1;
     VECTOR3D c1;
     VECTOR3D d1;
 float k=;
 #define fudu 0.1
 #define len 1
 #define lenz 20
 #define ox 300
 #define oy 300
 int one=;
 float sdx(VECTOR3D a)
 {
     return (ox+one*a.x/(a.z+lenz)*len);
 }
 float sdy(VECTOR3D a)
 {
     return (oy+one*a.y/(a.z+lenz)*len);
 }
 void li(VECTOR3D a,VECTOR3D b)
 {
     line_f(sdx(a),sdy(a),sdx(b),sdy(b));
 }
 void mia(VECTOR3D a,VECTOR3D b,VECTOR3D c)
 {
     int mian[]=
     {
         sdx(a),sdy(a),
         sdx(b),sdy(b),
         sdx(c),sdy(c),
     };
     fillpoly(,mian);
 }
 void print()
 {
     cleardevice();
     setcolor(0xFFFFFF);
     setfillcolor(0x9999FF);
     mia(a,b,c);
     mia(a,b,d);
     mia(a,c,d);
     mia(d,b,c);
     mia(a1,b1,c1);
     mia(a1,b1,d1);
     mia(a1,c1,d1);
     mia(d1,b1,c1);
     li(a,b);
     li(b,c);
     li(c,d);
     li(d,a);
     li(a,c);
     li(b,d);
     li(a1,b1);
     li(b1,c1);
     li(c1,d1);
     li(d1,a1);
     li(a1,c1);
     li(b1,d1);
     delay_ms();
 }
 void change()
 {
     char ch=getch();
     if(ch=='w')
     {
     a.Rotate(fudu,,,);
     b.Rotate(fudu,,,);
     c.Rotate(fudu,,,);
     d.Rotate(fudu,,,);
     a1.Rotate(fudu,,,);
     b1.Rotate(fudu,,,);
     c1.Rotate(fudu,,,);
     d1.Rotate(fudu,,,);
     }
     else
     if(ch=='s')
     {
     a.Rotate(fudu,-,,);
     b.Rotate(fudu,-,,);
     c.Rotate(fudu,-,,);
     d.Rotate(fudu,-,,);
     a1.Rotate(fudu,-,,);
     b1.Rotate(fudu,-,,);
     c1.Rotate(fudu,-,,);
     d1.Rotate(fudu,-,,);
     }
     else
     if(ch=='a')
     {
     a.Rotate(fudu,,,);
     b.Rotate(fudu,,,);
     c.Rotate(fudu,,,);
     d.Rotate(fudu,,,);
     a1.Rotate(fudu,,,);
     b1.Rotate(fudu,,,);
     c1.Rotate(fudu,,,);
     d1.Rotate(fudu,,,);
     }
     else
     if(ch=='d')
     {
     a.Rotate(fudu,,-,);
     b.Rotate(fudu,,-,);
     c.Rotate(fudu,,-,);
     d.Rotate(fudu,,-,);
     a1.Rotate(fudu,,-,);
     b1.Rotate(fudu,,-,);
     c1.Rotate(fudu,,-,);
     d1.Rotate(fudu,,-,);
     }
     else
     if(ch==' ')
     {
     a.Rotate(fudu,,,);
     b.Rotate(fudu,,,);
     c.Rotate(fudu,,,);
     d.Rotate(fudu,,,);
     a1.Rotate(fudu,,,);
     b1.Rotate(fudu,,,);
     c1.Rotate(fudu,,,);
     d1.Rotate(fudu,,,);
     }
     else
     if(ch=='[')
         one-=;
     else
     if(ch==']')
         one+=;
 }
 int main()
 {
     printf("wasd旋转[]缩放");
     delay();
     initgraph(ox*,oy*);
     setrendermode(RENDER_MANUAL);
     a.x=;
     a.y=;
     a.z=-1.4142135623730950488016887242097/;
     b.x=;
     b.y=;
     b.z=1.4142135623730950488016887242097*1.5;
     c.x=-1.7320508075688772935274463415059;
     c.y=-;
     c.z=-1.4142135623730950488016887242097/;
     d.x=1.7320508075688772935274463415059;
     d.y=-;
     d.z=-1.4142135623730950488016887242097/;
     a1.x=1.7320508075688772935274463415059;
     a1.y=;
     a1.z=1.4142135623730950488016887242097/;
     b1.x=-1.7320508075688772935274463415059;
     b1.y=;
     b1.z=1.4142135623730950488016887242097/;
     c1.x=;
     c1.y=-;
     c1.z=1.4142135623730950488016887242097/;
     d1.x=;
     d1.y=;
     d1.z=-1.4142135623730950488016887242097*1.5;
     print();
     while()
     {
         change();
         print();
     }
 }

画了一个梅塔特隆立方体玩玩，看着应该比较顺眼