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Fixed DrawFilledCircle

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This commit is contained in:
Arawn Davies 2018-02-26 20:06:39 +00:00
parent e0eea66c3b
commit bcc5c2e3e0
1 changed files with 41 additions and 2 deletions
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43
source/Cosmos.System2/Graphics/Canvas.cs
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@ -257,8 +257,47 @@ namespace Cosmos.System.Graphics
}
public virtual void DrawFilledCircle(Pen pen, int x_center, int y_center, int radius)
public virtual void DrawFilledCircle(Pen pen, int x0, int y0, int radius)
{
int x = radius;
int y = 0;
int xChange = 1 - (radius << 1);
int yChange = 0;
int radiusError = 0;
while (x >= y)
{
for (int i = x0 - x; i <= x0 + x; i++)
{
DrawPoint(pen, i, y0 + y);
DrawPoint(pen, i, y0 - y);
}
for (int i = x0 - y; i <= x0 + y; i++)
{
DrawPoint(pen, i, y0 + x);
DrawPoint(pen, i, y0 - x);
}
y++;
radiusError += yChange;
yChange += 2;
if (((radiusError << 1) + xChange) > 0)
{
x--;
radiusError += xChange;
xChange += 2;
}
}
/*
for (int y = -radius; y <= radius; y++)
for (int x = -radius; x <= radius; x++)
if (x * x + y * y <= radius * radius)
(origin.x + x, origin.y + y);
if (pen == null)
throw new ArgumentNullException(nameof(pen));
ThrowIfCoordNotValid(x_center + radius, y_center);
@ -282,7 +321,7 @@ namespace Cosmos.System.Graphics
x--;
e -= 2 * x + 1;
}
}
}*/
}
public virtual void DrawFilledCircle(Pen pen, Point point, int radius)
{