Is there anyway to rotate an image of wheel continuously?

[RaaZ Shrestha]

I want to spin image of an wheel continuously in C++ using C++Builder. I was able to rotate the wheel for only one time. Help needed.
Here is the code:

void __fastcall TForm1::Button1Click(TObject *Sender)
{
int angle=45; //45° for example
Graphics::TBitmap *SrcBitmap=new Graphics::TBitmap;
Graphics::TBitmap *DestBitmap=new Graphics::TBitmap;
SrcBitmap->LoadFromFile("image1.bmp");
//Convert degrees to radians
float radians=(2*3.1416*angle)/360;

float cosine=(float)cos(radians);
float sine=(float)sin(radians);

float Point1x=(-SrcBitmap->Height*sine);
float Point1y=(SrcBitmap->Height*cosine);
float Point2x=(SrcBitmap->Width*cosine-SrcBitmap->Height*sine);
float Point2y=(SrcBitmap->Height*cosine+SrcBitmap->Width*sine);
float Point3x=(SrcBitmap->Width*cosine);
float Point3y=(SrcBitmap->Width*sine);

float minx=min(0,min(Point1x,min(Point2x,Point3x)));
float miny=min(0,min(Point1y,min(Point2y,Point3y)));
float maxx=max(Point1x,max(Point2x,Point3x));
float maxy=max(Point1y,max(Point2y,Point3y));

int DestBitmapWidth=(int)ceil(fabs(maxx)-minx);
int DestBitmapHeight=(int)ceil(fabs(maxy)-miny);

DestBitmap->Height=DestBitmapHeight;
DestBitmap->Width=DestBitmapWidth;
Form1->Refresh();
for(int x=0;x<DestBitmapWidth;x++)
{
for(int y=0;y<DestBitmapHeight;y++)
{
int SrcBitmapx=(int)((x+minx)*cosine+(y+miny)*sine);
int SrcBitmapy=(int)((y+miny)*cosine-(x+minx)*sine);
if(SrcBitmapx>=0&&SrcBitmapx<SrcBitmap->Width&&SrcBitmapy>=0&&
SrcBitmapy<SrcBitmap->Height)
{
DestBitmap->Canvas->Pixels[x][y]=
SrcBitmap->Canvas->Pixels[SrcBitmapx][SrcBitmapy];
}
}
}
//Show the rotated bitmap
Image1->Picture->Bitmap=DestBitmap;
delete DestBitmap;
delete SrcBitmap;
}

[Phongphan]

Try to adding some code : making step's parameter in while loop.

[Phongphan]

Cos(∆) = e^(i∆) = 1 -(∆^2n)/2! + (-1)^2n-1*(∆^2n)/2n! ; n=1..N

[Phongphan]

You may try to make the table of angle.

[Phongphan]

Or you may show wheel picture by each angle one by one form loaded picture set.

See : making picture... By mauro