发过一个球体 http://www.bathome.net/thread-31264-1-1.html 是 dostips 上的外国人做的.
因为是以坐标轴方向为视线方向, 而且球面在 比较 远处始终可近似认为 正好朝着观察者的半个球面是可见的(实际上小于半个球面)
这样, 消隐算法可以简化成对单一坐标数值的检测. 比如 z > 0 可见, 否则, 不可见.
这里做了一个, 很简单的, 物体不是 "体" 一个面而已, 就不管消隐了, 为了简化.
空间坐标系: X 正向右, Y 正向上, Z 正向着你, 小心被扎到哦.
旋转轴 没有采用任意轴, 而是 过原点的, 由两点确定 {0,0,0} -- {u,v,w}, 而且须 u^2 + v^2 + w^2 = 100 (原始公式 u^2 + v^2 + w^2 = 1, 这里为了把 u,v,w 都放大 10 倍)
u,v,w 的组合:
{10,0,0} 绕 X 轴
{0,10,0} 绕 Y 轴
{0,0,10} 绕 Z 轴
运行速度并不理想, 呃, 我没有提速的好点子了 | @echo off & setlocal enabledelayedexpansion & color 0a & chcp 437 & title CMD 3D | | | | if "%1"=="" ( | | for %%a in ( FontSize:00080008 FontFamily:00000030 WindowSize:00560055 | | ScreenColors:0000000f CodePage:000001b5 ScreenBufferSize:00560055 | | ) do for /f "tokens=1,2 delims=:" %%b in ("%%a") do ( | | >nul reg add HKCU\Console\3D_ROTATE /v %%b /t reg_dword /d 0x%%c /f | | ) | | | | start "3D_ROTATE" /max "%ComSpec%" /c "%~s0" 1&goto:eof | | ) else ( | | >nul reg delete HKCU\Console\3D_ROTATE /f | | ) | | | | set "SIN=(A-A*A/1875*A/320000+A*A/1875*A/15625*A/16000*A/2560000-A*A/1875*A/15360*A/15625*A/15625*A/16000*A/44800000)" | | set "COS=(10000-A*A/20000+A*A/1875*A/15625*A/819200-A*A/1875*A/15360*A/15625*A/15625*A/10240000+A*A/1875*A/15360*A/15625*A/15625*A/16000*A/15625*A/229376000)" | | set /a "ZM=10000, p=31416, p2=62832, pn2=-62832, p#2=15708, p3#2=47124, p3#2_=p3#2-1, DEG=31416/180" | | | | set "DOT=? | | for %%a in ( " | | " ## ## ##" | | " #### ## ##" | | " ## ## ##" | | " ## ## ##" | | "###### ###### " ) do ( | | set "s1=!s1!%%~a=" | | ) | | set "s1=!s1:#=%DOT%!" | | | | set "t=" & set /a "x=0,y=0,pcnt=0" | | for /l %%a in (0 1 300) do ( | | if "!s1:~%%a,1!" equ "%DOT%" ( | | set /a "pcnt+=1" | | set /a "xs!pcnt!=(x-7)*3,ys!pcnt!=(y-3)*3" | | ) | | | | if "!s1:~%%a,1!" equ "=" (set /a "y+=1,x=0") else (set /a "x+=1") | | ) | | | | set /a "wid=0X55, Cols=wid, lines=wid+1, iMax=wid*wid" | | MODE !Cols!,!lines! | | | | for /l %%i in (1 1 !iMax!) do set "scr= !scr!" | | set "emp=!scr!" | | | | set /a "th=0, XC = Cols/2, YC = lines/2, zscr = 30, zeye = 200, zs = zscr, u = 6, v = 8, w = 0" | | for /l %%a in () do ( | | set /a "th+=p2+10*DEG, th %%= p2, th += th>>31&p2, t=th, s1=(t-p#2^t-p3#2)>>31, s3=p3#2_-t>>31, t=(-t&s1)+(t&~s1)+(p&s1)+(pn2&s3), SINt=%SIN:A=t%, t=%COS:A=t%, COSt=(-t&s1)+(t&~s1)" | | | | for /l %%i in (1 1 !pcnt!) do ( | | set /a "zs2e=zscr-zeye,uxvywz=u*xs%%i+v*ys%%i+w*zs,v_1_COSt=ZM-COSt,uvwM1_COSt=uxvywz*v_1_COSt,z_t2eye_ZM=(w*uvwM1_COSt/100+zs*COSt+(-v*xs%%i+w*ys%%i)*SINt/10)-zeye*ZM, x=XC + (u*uvwM1_COSt/100 + xs%%i*COSt + (-w*ys%%i + v*zs)*SINt/10)*zs2e/z_t2eye_ZM, y=YC + (v*uvwM1_COSt/100 + ys%%i*COSt + (+w*xs%%i - u*zs)*SINt/10)*zs2e/z_t2eye_ZM, inScr=(x-0^x-wid)&(y-0^y-wid)" | | if !inScr! lss 0 ( | | set /a "ind=x+y*wid+1, lenL=ind-1, lenR=iMax-ind" | | for /f "tokens=1,2,3" %%a in ("!lenL! !ind! !lenR!") do (set scr=!scr:~0,%%a!!DOT!!scr:~%%b,%%c!) | | ) | | ) | | | | cls &(<nul set /p=!scr:~0,-1!) | | set "scr=!emp!" | | )COPY |
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