public void Erase(IBrushDrawable drawable, int brushX, int brushY)
{
for (int by = 0; by < Size; by++)
{
for (int bx = 0; bx < Size; bx++)
{
int fx = brushX + bx;
int fy = brushY + by;
if (drawable.IsDrawable(fx, fy))
{
int index = fx + (fy * drawable.Width);
int brushIndex = (int)(bx + by * Size);
drawable.Colors[index].a = Mathf.Clamp01(drawable.Colors[index].a - Alphas[brushIndex]);
}
}
}
}
public void Draw(IBrushDrawable drawable, int brushX, int brushY, UnityEngine.Color color)
{
for (int by = 0; by < Size; by++)
{
for (int bx = 0; bx < Size; bx++)
{
int fx = brushX + bx;
int fy = brushY + by;
if (drawable.IsDrawable(fx, fy))
{
int index = fx + (fy * drawable.Width);
int brushIndex = (int)(bx + by * Size);
UnityEngine.Color A = color;
A.a *= Alphas[brushIndex];
drawable.Colors[index] = drawable.Colors[index].AlphaComposite(A);
}
}
}
}