public void veelip(Graphics g)
{
//code ve elip
//Elip su dung thuat toan midpoint
int x, y, cx, cy;
cx = tam.X; cy = tam.Y;
x = 0; y = this.b;
int A, B;
A = a * a;
B = b * b;
double p = B + A / 4 - A * b;
x = 0;
y = b;
int Dx = 0;
int Dy = 2 * A * y;
put4pitxel(x, y, g);
while (Dx < Dy)
{
x++;
Dx += 2 * B;
if (p < 0)
{
p += B + Dx;
}
else
{
y--;
Dy -= 2 * A;
p += B + Dx - Dy;
}
if (x % 5 == 0)
{
put4pitxel(x, ToaDo.round(y), g);
}
}
p = Math.Round(B * (x + 0.5f) * (x + 0.5f) + A * (y - 1) * (y - 1) - A * B);
while (y > 0)
{
y--;
Dy -= A * 2;
if (p > 0)
{
p += A - Dy;
}
else
{
x++;
Dx += B * 2;
p += A - Dy + Dx;
}
if (x % 5 == 0)
{
put4pitxel(x, ToaDo.round(y), g);
}
}
}
public void venetdut_elip(Graphics g)
{
int x, y, cx, cy, a, b;
cx = this.tam.X;
cy = this.tam.Y;
a = this.a;
b = this.b;
x = 0;
y = b;
int A, B;
A = a * a;
B = b * b;
double p = B + A / 4 - A * b;
x = 0;
y = b;
int Dx = 0;
int Dy = 2 * A * y;
put4pitxel_3D(x, y, g);
while (Dx <= Dy)
{
x += 1;
Dx += 2 * B;
if (p < 0)
{
p += B + Dx;
}
else
{
y -= 1;
Dy -= 2 * A;
p += B + Dx - Dy;
}
if (x % 5 == 0)
{
put4pitxel_3D(x, ToaDo.round(y), g);
}
}
p = Math.Round(B * (x + 0.5f) * (x + 0.5f) + A * (y - 1) * (y - 1) - A * B);
while (y >= 0)
{
y -= 1;
Dy -= A * 2;
if (p > 0)
{
p += A - Dy;
}
else
{
x += 1;
Dx += B * 2;
p += A - Dy + Dx;
}
if (x % 5 == 0)
{
put4pitxel_3D(x, ToaDo.round(y), g);
}
}
}