#include "myWin.h"
#include "math.h"
#define PI 3.14159265358979
static double curX, curY, Theta;
void t_pos(double X, double Y){ curX = X; curY = Y;}
void t_deg (double T){ Theta  = T;}
void t_turn(double T){ Theta += T;}
void t_forward(HDC hdc,double length){
	double TH = Theta * PI / 180;
	double X  = curX+length*cos(TH);
	double Y  = curY+length*sin(TH);
	MoveToEx(hdc,(int)curX, 100 -(int)curY, NULL);
	LineTo (hdc,(int) X, 100 -(int) Y);
	curX=X; curY=Y;
}
void koch(HDC hdc,int n, double length){
	if(n<=0) { t_forward(hdc,length); return; }
	int nn=n -1;double len=length/3;
	koch(hdc,nn,len);t_turn(  60);
	koch(hdc,nn,len);t_turn(-120);
	koch(hdc,nn,len);t_turn(  60);
	koch(hdc,nn,len);
}
void procPaint(HWND hw, WPARAM wp,LPARAM lp){
	PAINTSTRUCT ps;	HDC hdc=BeginPaint(hw, &ps);
	t_pos(0,0); t_deg(0); koch(hdc,5,300);
	EndPaint(hw,&ps);
}
void procCreate(HWND hw, WPARAM wp,LPARAM lp){
	SetWindowText(hw,TEXT("ƒRƒbƒz‹È�ü"));
	MoveWindow(hw,0,0,300,200,TRUE);
}
LRESULT CALLBACK WndProc(HWND hw, UINT msg, WPARAM wp,LPARAM lp){
	switch(msg){
	case WM_DESTROY : PostQuitMessage(0)  ; return 0;
	case WM_CREATE  : procCreate(hw,wp,lp); return 0;
	case WM_PAINT   : procPaint(hw,wp,lp) ; return 0;
	}
	return DefWindowProc(hw,msg,wp,lp);
}