public static Color[] GetColorRamp(ColorRampEnum index)
{
if (index == ColorRampEnum.Default)
return _default;
else
return null;
}
public static Color[] GetColorRamp(ColorRampEnum index)
{
if (index == ColorRampEnum.Default)
{
return(_default);
}
else
{
return(null);
}
}
/// <summary>
/// Init a new Voronoi engine
/// </summary>
/// <param name="nbOfPoints"></param>
public VoronoiEngine(int nbOfPoints, ColorRampEnum colorRamp = ColorRampEnum.RAINBOW, ApplyColorDirectionEnum colorDirection = ApplyColorDirectionEnum.NONE) : this()
{
for (var i = 0; i < nbOfPoints; i++)
{
this._points.Add(new VoronoiPoint
{
Color = Color.Black,
InitialCoordinates = new Vector2
{
X = this._random.Next(0, 100) / 100.0f,
Y = this._random.Next(0, 100) / 100.0f
}
});
}
this.ApplyColorRamp(colorRamp, colorDirection);
}
/// <summary>
/// Generate a color ramp according to provided enum
/// </summary>
/// <param name="ramp"></param>
/// <returns></returns>
private Color[] GenerateColorRamp(ColorRampEnum ramp)
{
Color[] res = new Color[256];
if (ramp == ColorRampEnum.GRAY_SCALE)
{
for (int i = 0; i < 256; i++)
{
res[i] = new Color(i, i, i);
}
}
else if (ramp == ColorRampEnum.RAINBOW)
{
for (int i = 0; i < 256; i++)
{
res[i] = Toolkit.FromHsl((float)i / 256f, 1f, 0.5f);
var d = res[i];
}
}
return(res);
}
/// <summary>
/// Apply a color ramp according to provided enum
/// </summary>
/// <param name="ramp"></param>
/// <returns></returns>
private void ApplyColorRamp(ColorRampEnum ramp, ApplyColorDirectionEnum colorDirection = ApplyColorDirectionEnum.NONE)
{
var pointCount = this._points.Count;
if (colorDirection == ApplyColorDirectionEnum.HORIZONTAL)
{
this._points.Sort((a, b) => a.RelativeCoordinates.X.CompareTo(b.RelativeCoordinates.X));
}
else if (colorDirection == ApplyColorDirectionEnum.VERTICAL)
{
this._points.Sort((a, b) => a.RelativeCoordinates.Y.CompareTo(b.RelativeCoordinates.Y));
}
if (ramp == ColorRampEnum.GRAY_SCALE)
{
for (int i = 0; i < pointCount; i++)
{
var comp = (int)(i * 256.0 / pointCount);
this._points[i].Color = new Color(comp, comp, comp);
}
}
else if (ramp == ColorRampEnum.RAINBOW)
{
for (int i = 0; i < pointCount; i++)
{
this._points[i].Color = Toolkit.FromHsl(i / 20.0f, 1f, 0.5f);
}
}
else if (ramp == ColorRampEnum.OCEAN)
{
var colors = Toolkit.GenerateRampBetween(Color.Blue, Color.White, this._points.Count);
for (int i = 0; i < this._points.Count; i++)
{
this._points[i].Color = colors[i];
}
}
else if (ramp == ColorRampEnum.DARK_LEAF)
{
var colors = Toolkit.GenerateRampBetween(Color.Green, Color.Black, this._points.Count);
for (int i = 0; i < this._points.Count; i++)
{
this._points[i].Color = colors[i];
}
}
else if (ramp == ColorRampEnum.LAVA)
{
var colors = Toolkit.GenerateRampBetween(Color.Yellow, Color.Red, this._points.Count);
for (int i = 0; i < this._points.Count; i++)
{
this._points[i].Color = colors[i];
}
}
else if (ramp == ColorRampEnum.RANDOM)
{
for (int i = 0; i < pointCount; i++)
{
this._points[i].Color = new Color(
this._random.Next(0, 255),
this._random.Next(0, 255),
this._random.Next(0, 255)
);
}
}
}
/// <summary>
/// Init a new VoronoiEngine with a list of points
/// </summary>
/// <param name="points"></param>
public VoronoiEngine(List <VoronoiPoint> points, ColorRampEnum colorRamp = ColorRampEnum.RAINBOW, ApplyColorDirectionEnum colorDirection = ApplyColorDirectionEnum.NONE)
{
this._points = points;
this.ApplyColorRamp(colorRamp, colorDirection);
}
/// <summary>
/// Generate plasma effect on a device (as a Texture2D) with given width and height
/// <returns></returns>
public Texture2D GeneratePlasma(GraphicsDevice device, int width, int height, ColorRampEnum colorRamp = ColorRampEnum.GRAY_SCALE, int shiftX = 0, int shiftY = 0, int colorRampShift = 0, int ratio = 50)
{
Texture2D rect = new Texture2D(device, width, height);
Color[] data = new Color[width * height];
/*for (int x = 0; x < width; x++)
* {
* for (int y = 0; y < height; y++)
* {
* var p = this.GetPlasmaPatternAt(x, y, width, height);
* var color = this._colorRamp[colorRamp][(p + colorRampShift) % 256];
* data[((y) * width) + (x)] = color;
* }
* }*/
/*for (int i=0; i < data.Length; i++)
* {
* var p = this.GetPlasmaPatternAt(i%width, i/width, width, height);
* var color = this._colorRamp[colorRamp][(p + colorRampShift) % 256];
* data[i] = color;
* }*/
var stepX = ratio;
var stepY = ratio;
for (int x = 0; x < width; x += stepX)
{
for (int y = 0; y < height; y += stepY)
{
var p = this.GetPlasmaPatternAt(x + shiftX, y + shiftY, width, height);
var color = this._colorRamp[colorRamp][(p + colorRampShift) % 256];
var topA = Math.Min(x + stepX, width);
var topB = Math.Min(y + stepY, height);
for (int a = x; a < topA; a++)
{
for (int b = y; b < topB; b++)
{
data[((b) * width) + (a)] = color;
}
}
}
}
rect.SetData(data);
return(rect);
}
