public SpotFunctionPanel()
: base(4, 2, false)
{
// TODO: use degrees instead of radians
angleHScale = new HScale(0, 2, 0.01);
distanceSpinButton = new SpinButton(1, 1000, 1);
presets = new List<SpotFunction>(SpotFunction.Samples.list());
presetsNames = (from preset in presets select preset.Name).ToList();
presetComboBox = new ComboBox(presetsNames.ToArray());
presetComboBox.Changed += delegate
{
int active = presetComboBox.Active;
if (active >= 0) {
module = (SpotFunction)presets[active].deepCopy();
}
};
ColumnSpacing = RowSpacing = BorderWidth = 5;
Attach(new Label("Preset:") { Xalign = 0.0f }, 0, 1, 0, 1,
AttachOptions.Fill,
AttachOptions.Shrink, 0, 0);
Attach(presetComboBox, 1, 2, 0, 1,
AttachOptions.Fill | AttachOptions.Expand,
AttachOptions.Shrink, 0, 0);
Attach(new Label("Screen angle (rad):") { Xalign = 0.0f }, 0, 1, 1, 2,
AttachOptions.Fill,
AttachOptions.Shrink, 0, 0);
Attach(angleHScale, 1, 2, 1, 2,
AttachOptions.Fill | AttachOptions.Expand,
AttachOptions.Shrink, 0, 0);
Attach(new Label("Screen line distance (px):") { Xalign = 0.0f },
0, 1, 2, 3,
AttachOptions.Fill,
AttachOptions.Shrink, 0, 0);
Attach(distanceSpinButton, 1, 2, 2, 3,
AttachOptions.Fill | AttachOptions.Expand,
AttachOptions.Shrink, 0, 0);
ShowAll();
}
static Samples()
{
_list = new List<SpotFunction>();
nullSpot = new SpotFunction((double angle, double distance) =>
{
return (int x, int y) => 128;
})
{
Name = "Null spot function"
}
;
euclidDot = new SpotFunction((double angle, double distance) =>
{
double pixelDivisor = 2.0 / distance;
return (int x, int y) =>
{
double rotatedX, rotatedY;
Util.rotate(
x * pixelDivisor, y * pixelDivisor,
angle, out rotatedX, out rotatedY);
return (int)(
255 * (0.5 - (0.25 * (
// to make an elipse multiply sin/cos
// arguments with different multipliers
Math.Sin(Math.PI * (rotatedX + 0.5)) +
Math.Cos(Math.PI * rotatedY)))));
};
})
{
Name = "Euclid dot",
Description = "circular dot changing to square at 50% grey"
};
_list.Add(euclidDot);
perturbedEuclidDot = new SpotFunction(
(double angle, double distance) =>
{
Random random = new Random();
double noiseAmplitude = 0.01;
double pixelDivisor = 2.0 / distance;
return (int x, int y) =>
{
double rotatedX, rotatedY;
SpotFunction.Util.rotate(
x * pixelDivisor, y * pixelDivisor,
angle, out rotatedX, out rotatedY);
return (int)(
255 * (
((random.NextDouble() - 0.5) * 2 * noiseAmplitude) +
(0.5 - (0.25 * (
// to make an elipse multiply sin/cos
// arguments with different multipliers
Math.Sin(Math.PI * (rotatedX + 0.5)) +
Math.Cos(Math.PI * rotatedY))))));
};
})
{
Name = "Euclid dot, perturbed",
Description = "Euclid dot with some noise"
};
_list.Add(perturbedEuclidDot);
squareDot = new SpotFunction((double angle, double distance) =>
{
return (int x, int y) =>
{
double rotatedX, rotatedY;
SpotFunction.Util.rotate(x, y, angle, out rotatedX, out rotatedY);
return (int)(255 *
(1 - (0.5 * (
Math.Abs(((Math.Abs(rotatedX) / (distance * 0.5)) % 2) - 1) +
Math.Abs(((Math.Abs(rotatedY) / (distance * 0.5)) % 2) - 1)
))));
};
})
{
Name = "Square dot"
};
_list.Add(squareDot);
line = new SpotFunction((double angle, double distance) =>
{
angle %= Math.PI * 0.5;
double invDistance = 1 / distance;
double sinInvDistance = Math.Sin(angle) * invDistance;
double cosInvDistance = Math.Cos(angle) * invDistance;
return (int x, int y) =>
{
double value = (sinInvDistance * x) + (cosInvDistance * y);
return (int)(255 * (Math.Abs(
Math.Sign(value) * value % Math.Sign(value))));
};
})
{
Name = "Line"
};
_list.Add(line);
triangle = new SpotFunction((double angle, double distance) =>
{
double invDistance = 1 / distance;
return (int x, int y) =>
{
// TODO: it does not rotate
return (int)(255 * 0.5 * (
((invDistance * x) % 1) +
((invDistance * y) % 1)
));
};
})
{
Name = "Triangle"
};
_list.Add(triangle);
circleDot = new SpotFunction((double angle, double distance) =>
{
double invDistance = 1 / distance;
return (int x, int y) =>
{
// TODO: fix this
double xSq = x - distance * 0.5;
xSq = (xSq * xSq) % distance;
double ySq = y - distance * 0.5;
ySq = (ySq * ySq) % distance;
return (int)(255 *
//((1 - Math.Sqrt(
//(invDistance * (x*x) % 1) +
//(invDistance * (y*y) % 1)
//) * 0.5)));
((1 - invDistance * Math.Sqrt(2*(xSq + ySq)))));
};
})
{
Name = "Circle dot"
};
// TODO: uncomment this when circle dot will work
//_list.Add(circleDot);
}
/// <summary>
/// Create a new spot function threshold filter with given spot
/// function.
/// </summary>
/// <param name="spotFunc"></param>
public SpotFunctionThresholdFilter(SpotFunction spotFunc)
{
SpotFunc = spotFunc;
}
/// <summary>
/// Create a new image generator with a default spot functions
/// and no effects.
/// </summary>
public ImageGenerator()
{
SpotFunction = new SpotFunction();
Effects = new List<IImageFilter>();
}
/// <summary>
/// Create a new spot function threshold filter with a default
/// spot function.
/// </summary>
public SpotFunctionThresholdFilter()
{
SpotFunc = new SpotFunction();
}
