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 DrawLine(IBrushDrawable drawable, int fromX, int fromY, int toX, int toY, UnityEngine.Color color)
{
var distanceX = (float)Mathf.Abs(fromX - toX);
var distanceY = (float)Mathf.Abs(fromY - toY);
float stepX = 0f;
float stepY = 0f;
int iterations = 0;
if (distanceX > distanceY)
{
iterations = (int)distanceX;
if (iterations > 0)
{
stepX = fromX < toX ? 1f : -1f;
stepY = (toY - fromY) / distanceX;
}
}
else
{
iterations = (int)distanceY;
if (iterations > 0)
{
stepX = (toX - fromX) / distanceY;
stepY = fromY < toY ? 1f : -1f;
}
}
float lx = fromX;
float ly = fromY;
for (int li = 0; li < iterations; li++)
{
Draw(drawable, (int)Mathf.RoundToInt(lx), (int)Mathf.RoundToInt(ly), color);
ly += stepY;
lx += stepX;
}
Draw(drawable, (int)(toX), (int)(toY), color);
}
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);
}
}
}
}
public void Erase(IBrushDrawable drawable, int brushX, int brushY)
{
drawable.Bitmap.Subtract(BrushTexture, new TextureBitmap.Color(0, 0, 0, 255), new TextureBitmap.Point(brushX, brushY), null, drawable.IsDrawable);
}
public void Draw(IBrushDrawable drawable, int brushX, int brushY, UnityEngine.Color color)
{
drawable.Bitmap.AlphaComposite(BrushTexture, new TextureBitmap.Color((byte)(color.r * 255f), (byte)(color.g * 255f), (byte)(color.b * 255f), (byte)(color.a * 255f)), new TextureBitmap.Point(brushX, brushY), null, drawable.IsDrawable);
}
