BorlandTalk.com

Bongo · Guest

I am trying to draw a circle on an image, but it seems to be very slow.
Here is a snippet of my code:

/*
Size, XCoord and YCoord are passed into the function. They represent
the number of pixels required in the circle, and its position in the
image
*/

double rad = sqrt(Size/M_PI);
float deg = 0;
int X, Y;
do {
for (int i = 0; i <= rad; i++)
for (int j = 0; j <= rad; j++){
X = floor(i * cos(deg));
Y = floor(j * sin(deg));
if (Form1->Image1->Canvas->Pixels[X+XCoord][Y+YCoord]!= clBlue)
Form1->Image1->Canvas->Pixels[X+XCoord][Y+YCoord] = clBlue;
}deg += 0.005;
}
while (deg <= 6.4);

Is using 'Image1->Canvas->Pixels[x][y]' the correct way to go about
doing this, or is there a better way?

Any suggestions are appreciated,
Thanks