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| #include <stdlib.h>
#include <time.h>
#include <grx20.h>
#include <grxkeys.h>
#include <math.h>
struct TPoint{
int x,y;
int w,h;
int r;
int color;
int vx,vy;
float va,vs;
float a, s;
TPoint(int ix,int iy,int icolor);
virtual ~TPoint();
virtual void Draw(int icolor);
void Show();
void Hide();
void MoveXY(int ix, int iy);
};
struct TBox: public TPoint{
TBox(int ix,int iy,int iw,int ih,int icolor);
virtual ~TBox();
virtual void Draw(int icolor);
virtual void SizeX (int iw, int ix);
virtual void SizeY (int ih, int iy);
};
struct TCircle: public TPoint{
TCircle(int ix,int iy,int icolor,int ir);
virtual ~TCircle();
virtual void Draw(int icolor);
virtual void SizeR (int ir);
};
struct TLine: public TPoint {
TLine(int ix, int iy, int icolor, int ir);
virtual ~TLine();
virtual void Draw(int icolor);
virtual void SizeR(int ir);
};
TPoint::TPoint(int ix,int iy,int icolor){
color=icolor;
x=ix; y=iy;
a=0; s=0;
vx=rand()%7-3;
vy=rand()%7-3;
va=0.05;
vs=0.5;
}
TPoint::~TPoint()
{Hide();}
void TPoint::Draw(int icolor){
GrPlot(x,y,icolor);
GrPlot(x+1,y,icolor);
GrPlot(x,y+1,icolor);
GrPlot(x+1,y+1,icolor);
}
void TPoint::Show()
{Draw(color);}
void TPoint::Hide()
{Draw(0);}
void TPoint::MoveXY(int ix,int iy)
{
Hide();
//x=ix;
//y=iy;
//if (ix >= GrMaxX()-1){x = 1;};
//if (ix <= 1){x = GrMaxX()-1;};
//if (iy >= GrMaxY()-1){y = 0;};
//if (iy <= 1){y = GrMaxY()-1;};
a=a+va;
s=s+vs;
x=(GrMaxX()/2+s*cos(a));
y=(GrMaxY()/2-s*sin(a));
Show();
}
TBox::TBox(int ix,int iy,int iw,int ih,int icolor):TPoint(ix,iy,icolor)
{w=iw; h=ih;}
TBox::~TBox(){Hide();}
void TBox::Draw(int icolor)
{
GrBox(x-w/2,y-h/2,x+(w-w/2),y+(h-h/2),icolor);
}
void TBox::SizeX(int ix,int iw)
{w=rand()%49+1;};
void TBox::SizeY(int iy,int ih)
{h=rand()%49+1;};
TLine::TLine(int ix,int iy, int icolor, int ir): TPoint(ix,iy,icolor)
{r=ir;}
TLine::~TLine(){Hide();}
void TLine::Draw(int icolor)
{
GrLine(x-r,y-r,x+r,y+r,icolor);
}
void TLine::SizeR(int ir)
{r=rand()%49+1;};
TCircle::TCircle(int ix,int iy,int icolor,int ir): TPoint(ix,iy,icolor)
{r=ir;}
TCircle::~TCircle()
{Hide();}
void TCircle::Draw(int icolor)
{GrEllipse(x,y,r/2,r,icolor);}
void TCircle::SizeR(int ir)
{r=rand()%49+1;};
#define M 100
main()
{int N=3;
TPoint *obj[M];
GrSetMode(GR_default_graphics);
srand(time(0));
obj[0]=new TPoint(GrMaxX()/2,GrMaxY()/2,0);
obj[1]=new TPoint(GrMaxX()/2,GrMaxY()/2,0);
for(int i=2; i<N; i++){
switch(rand()%4){
case 0:obj[i]=new TPoint(GrMaxX()/2,GrMaxY()/2,9);break;
case 1:obj[i]=new TBox(GrMaxX()/2,GrMaxY()/2,rand()%15+10,rand()%15+10,12);break;
case 2:obj[i]=new TCircle(GrMaxX()/2,GrMaxY()/2,10, rand()%15+2);break;
case 3:obj[i]=new TLine(GrMaxX()/2,GrMaxY()/2,10, rand()%15+2);break;
}
obj[i]->Show();
}
GrKeyType key;
do{
while (!GrKeyPressed()){
GrSleep(40);
for(int i=0; i<N; i++){
obj[i]->MoveXY(obj[i]->x+obj[i]->vx,obj[i]->y+obj[i]->vy);
if (rand()%100==50){
obj[i]->vx=rand()%11-5; obj[i]->vy=rand()%11-5;
}
}
}
key=GrKeyRead();
switch(key){
case GrKey_Insert:
if (N<M){
switch(rand()%4){
case 0:obj[N]=new TPoint(GrMaxX()/2,GrMaxY()/2,9);break;
case 1:obj[N]=new TBox(GrMaxX()/2,GrMaxY()/2,rand()%15+10,rand()%15+10,12);break;
case 2:obj[N]=new TCircle(GrMaxX()/2,GrMaxY()/2,10, rand()%15+2);break;
case 3:obj[N]=new TLine(GrMaxX()/2,GrMaxY()/2,10, rand()%15+2);break;
}
N++;
}
break;
case GrKey_Delete:
if (N>0){
delete obj[N-1];
N--;
}
break;
}
}
while(key!=GrKey_Escape);
for(int i=0; i<N; i++){
delete obj[i];}
} |
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