;Astroid.asm
;星形线极坐标方程如下：
;x=acos^3t
;y=asin^3t
;不足之处，敬请指导。
;QQ:112426112
;Email:leguanyuan at 126 dot com
;Homtpage:http://correy.webs.com
.386
.model flat,stdcall
option casemap:none
include windows.inc
include kernel32.inc
include user32.inc
includelib user32.lib
includelib kernel32.lib
include gdi32.inc
includelib gdi32.lib

.data?
hInstance dd ?
hWinMain dd ?
stMsg MSG <>

.code
szClassName db "correy",0
szCaptionMain db "made by correy",0
pwndclassex dd 48,3,offset liuchunli,0,0,0,0,0,6,0,offset szClassName,0

liuchunli proc uses ebx edi esi,hWnd,uMsg,wParam,lParam
LOCAL ps:PAINTSTRUCT
LOCAL hdc:HDC
LOCAL rect:RECT
local Count:DWORD, Linelength:DWORD, base:DWORD
local x_offset:dword,y_offset:dword,temp:dword
.if uMsg == WM_CLOSE
  invoke DestroyWindow,hWinMain
  invoke PostQuitMessage,0  
.elseif uMsg == WM_PAINT
  invoke  BeginPaint, hWnd, addr ps
  mov     hdc, eax
  finit
  mov     Count, 0
  mov x_offset,128h
  mov y_offset,123h
  mov     eax, y_offset
  mov     Linelength, eax
  mov     esi,y_offset
  shl     esi, 1
  .while   Count < esi
    mov     eax, Count
    mov     temp, eax
    shl     temp, 1
    fild    temp
    fimul   Linelength
    fild    Count
    fmul    st(0),st(0)
    fsubp   st(1),st(0)   
    fsqrt      
    fistp   base
    mov     eax, Count
    invoke  MoveToEx,hdc,x_offset,eax,0
    mov     eax, base
    add     eax, x_offset
    invoke  LineTo,hdc,eax,y_offset
    mov     eax, Count
    invoke  MoveToEx, hdc,x_offset,eax, 0
    mov     eax, x_offset
    sub     eax, base
    invoke  LineTo, hdc,eax,y_offset
    mov     eax, y_offset
    shl     eax, 1
    sub     eax, Count
    invoke  MoveToEx, hdc,x_offset,eax,0
    mov     eax, x_offset
    add     eax, base
    invoke  LineTo, hdc,eax,y_offset
    mov     eax,y_offset
    shl     eax,1
    sub     eax,Count
    invoke  MoveToEx,hdc,x_offset,eax,0
    mov     eax,x_offset
    sub     eax,base
    invoke  LineTo,hdc,eax,y_offset
    add     Count, 4
    .endw
  invoke  EndPaint,hWnd,addr ps
.else
  invoke DefWindowProc,hWnd,uMsg,wParam,lParam
  ret
.endif
xor eax,eax
ret
liuchunli endp

start:invoke GetModuleHandle,0
mov hInstance,eax
mov pwndclassex+20,eax
invoke LoadIcon,hInstance,1;加载图标，图标定义在资源文件中。
mov pwndclassex+24,eax
invoke LoadCursor,0,32512;加载箭头鼠标
mov pwndclassex+28,eax
invoke RegisterClassEx,addr pwndclassex
invoke CreateWindowEx,200h,offset szClassName,offset szCaptionMain,0Ca0000h,80000000h,80000000h,620,620,0,0,hInstance,0
mov hWinMain,eax
invoke ShowWindow,hWinMain,1
invoke UpdateWindow,hWinMain
again:invoke GetMessage,addr stMsg,0,0,0
  cmp eax,0
  je exit
  invoke TranslateMessage,addr stMsg
  invoke DispatchMessage,addr stMsg
jmp again
exit:invoke ExitProcess,0
end start
;made at 2010.03.26
;代码如诗，那是需要咬文嚼字的，更需要有品味的人欣赏。

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