public CircularFloatBrushGroup(float radius, CircularBrushMode mode, float threashhold, int size) : base(size)
{
this.mode = mode;
this.threashhold = threashhold;
this.radius = radius;
}
public CircularFloatBrush(float radius, float xOffset = 0, float yOffset = 0, CircularBrushMode mode = CircularBrushMode.Linear, float threashhold = THREASHHOLD_DEFAULT, bool offsetMod1 = true)
{
List <BrushTouple <float> > touplesList = new List <BrushTouple <float> >();
float radiusSquared = radius * radius;
radius = Math.Abs(radius);
if (offsetMod1)
{
xOffset = xOffset.Modulo(1);
yOffset = yOffset.Modulo(1);
}
if (threashhold < 0 || threashhold >= 1)
{
throw new ArgumentOutOfRangeException(nameof(threashhold));
}
for (int i = -((int)radius) - 1; i < (int)radius + 1; i++)
{
for (int j = -((int)radius) - 1; j < (int)radius + 2; j++)
{
float value = 0;
float x = i - xOffset;
float y = j - yOffset;
float dSquared = x * x + y * y;
float d = (float)Math.Sqrt(dSquared);
switch (mode)
{
case CircularBrushMode.Fill:
if (d <= radius)
{
value = 1;
}
break;
case CircularBrushMode.Quadratic_Smooth:
value = (radiusSquared - dSquared) / radiusSquared;
break;
case CircularBrushMode.Quadratic_EaseOut:
float temp1 = radius - d;
float temp2 = temp1 * temp1;
if (d < radius)
{
value = 1 - ((radiusSquared - temp2) / radiusSquared);
}
break;
case CircularBrushMode.Linear:
default:
value = (radius - d) / radius;
break;
}
if (value > threashhold)
{
touplesList.Add(new BrushTouple <float>(new CoordinateBasic(i, j), (value > 1) ? 1f : value));
}
}
}
touples = new BrushTouple <float> [touplesList.Count];
sum = 0;
for (int i = 0; i < touples.Length; i++)
{
sum += (touples[i] = touplesList[i]).value;
}
}
