static void plot4ellipsePoints (int cx, int cy, int x, int y, int colour, int filled)
{
if (filled)
{
lcd128x64line (cx + x, cy + y, cx - x, cy + y, colour) ;
lcd128x64line (cx - x, cy - y, cx + x, cy - y, colour) ;
}
else
{
lcd128x64point (cx + x, cy + y, colour) ;
lcd128x64point (cx - x, cy + y, colour) ;
lcd128x64point (cx - x, cy - y, colour) ;
lcd128x64point (cx + x, cy - y, colour) ;
}
}
void lcd128x64rectangle (int x1, int y1, int x2, int y2, int colour, int filled)
{
register int x ;
if (filled)
{
/**/ if (x1 == x2)
lcd128x64line (x1, y1, x2, y2, colour) ;
else if (x1 < x2)
for (x = x1 ; x <= x2 ; ++x)
lcd128x64line (x, y1, x, y2, colour) ;
else
for (x = x2 ; x <= x1 ; ++x)
lcd128x64line (x, y1, x, y2, colour) ;
}
else
{
lcd128x64line (x1, y1, x2, y1, colour) ;
lcd128x64lineTo (x2, y2, colour) ;
lcd128x64lineTo (x1, y2, colour) ;
lcd128x64lineTo (x1, y1, colour) ;
}
}
void lcd128x64circle (int x, int y, int r, int colour, int filled)
{
int ddF_x = 1 ;
int ddF_y = -2 * r ;
int f = 1 - r ;
int x1 = 0 ;
int y1 = r ;
if (filled)
{
lcd128x64line (x, y + r, x, y - r, colour) ;
lcd128x64line (x + r, y, x - r, y, colour) ;
}
else
{
lcd128x64point (x, y + r, colour) ;
lcd128x64point (x, y - r, colour) ;
lcd128x64point (x + r, y, colour) ;
lcd128x64point (x - r, y, colour) ;
}
while (x1 < y1)
{
if (f >= 0)
{
y1-- ;
ddF_y += 2 ;
f += ddF_y ;
}
x1++ ;
ddF_x += 2 ;
f += ddF_x ;
if (filled)
{
lcd128x64line (x + x1, y + y1, x - x1, y + y1, colour) ;
lcd128x64line (x + x1, y - y1, x - x1, y - y1, colour) ;
lcd128x64line (x + y1, y + x1, x - y1, y + x1, colour) ;
lcd128x64line (x + y1, y - x1, x - y1, y - x1, colour) ;
}
else
{
lcd128x64point (x + x1, y + y1, colour) ;
lcd128x64point (x - x1, y + y1, colour) ;
lcd128x64point (x + x1, y - y1, colour) ;
lcd128x64point (x - x1, y - y1, colour) ;
lcd128x64point (x + y1, y + x1, colour) ;
lcd128x64point (x - y1, y + x1, colour) ;
lcd128x64point (x + y1, y - x1, colour) ;
lcd128x64point (x - y1, y - x1, colour) ;
}
}
}
void lcd128x64lineTo (int x, int y, int colour)
{
lcd128x64line (lastX, lastY, x, y, colour) ;
}
