void testRays() {
Pixelator p( 512, 512, 64, 64 );
const unsigned int w = p.getWidth();
const unsigned int h = p.getHeight();
//some test cases
for(unsigned int y = 0; y < h; y += 8)
{
drawLineBresenham(p, w/2, h/2, w - 1, y, 255, 255, (255 * y) / h);
}
for(unsigned int x = 0; x < w; x += 8)
{
drawLineBresenham(p, w/2, h/2, x, h - 1, 0, (255 * x) / h, 255);
}
for(unsigned int y = 0; y < h; y += 8)
{
drawLineBresenham(p, w/2, h/2, 0, y, (255 * y) / h, 255, 255);
}
for(unsigned int x = 0; x < w; x += 8)
{
drawLineBresenham(p, w/2, h/2, x, 0, 255, (255 * x) / h, 0);
}
p.writeBMP("rays.bmp");
}
void drawPolygon(Polygon p) {
int i;
for (i=0 ; i<p.nPoint-1 ; i++) {
drawLineBresenham(p.lp[i].x , p.lp[i].y , p.lp[i+1].x, p.lp[i+1].y, p.color);
}
drawLineBresenham(p.lp[p.nPoint-1].x , p.lp[p.nPoint-1].y , p.lp[0].x, p.lp[0].y, p.color);
}
void testRand() {
Pixelator p( 512, 512, 64, 64 );
//some test cases
drawLineBresenham(p, 0, 0, 10, 10, 255, 255, 255);
drawLineBresenham(p, 20, 20, 12, 13, 255, 0, 255);
drawLineBresenham(p, 0, 15, 3, 11, 255, 0, 0);
drawLineBresenham(p, 9, 5, 9, 5, 0, 255, 0);
drawLineBresenham(p, 30, 5, 25, 6, 0, 0, 255);
drawLineBresenham(p, 40, 2, 40, 22, 0, 255, 255);
drawLineBresenham(p, 10, 2, 35, 2, 255, 255, 0);
// some random lines to a random bluish redish color
for( int i = 0; i < 100; i++ )
drawLineBresenham(p
, rand()%p.getCanvasWidth(), p.getCanvasHeight() / 2 + rand()%(2 * p.getCanvasHeight())
, rand()%p.getCanvasWidth(), p.getCanvasHeight() / 2 + rand()%(2 * p.getCanvasHeight())
, 100, 0, rand()%256 );
p.writeBMP("rand.bmp");
}