YxyDiagramGeometry

public sealed class YxyDiagramGeometry
All the vector geometry part of a chromaticity diagram cached for a specific frame. Try re-using instances of this class if possible to avoid unnecessary overhead.

Constructors

YxyDiagramGeometry

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public YxyDiagramGeometry(RectangleF frame)
Create a new diagram.
Parameters:
frame (RectangleF)Frame.

Properties

Frame

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public RectangleF Frame { get; }
Gets the frame this geometry is cached for.

GamutBlue

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public PointF GamutBlue { get; }
Gets the blue corner of the sRGB gamut triangle.

GamutGreen

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public PointF GamutGreen { get; }
Gets the green corner of the sRGB gamut triangle.

GamutRed

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public PointF GamutRed { get; }
Gets the red corner of the sRGB gamut triangle.

Grid

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public RectangleF Grid { get; }
Gets the grid rectangle. It takes up 80% of the frame width and 90% of the frame height.

PlanckInfinity

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public PointF PlanckInfinity { get; }
Gets the end point of the Planckian locus.

PlanckThousand

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public PointF PlanckThousand { get; }
Gets the start point of the Planckian locus.

YxyUnit

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public RectangleF YxyUnit { get; }
Gets the texture rectangle unit target rectangle. It exceeds the frame, but is used only to position Yxy vectorial unitised geometry within the grid.

Methods

DrawDiagramFill

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public void DrawDiagramFill(Context context, Bitmap texture)
Draw the Yxy diagram texture.
Parameters:
context (Context)Graphics context.
texture (Bitmap)Yxy texture. You should generate this using a YxyDiagramCache instance.

DrawGamutBoundary

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public void DrawGamutBoundary(Context context, Pen edge, Color labelColour, Font font)
Draw the sRGB gamut boundary.
Parameters:
context (Context)Graphics context.
edge (Pen)Pen to use for gamut boundary.
labelColour (Color)Colour of gamut label.
font (Font)Font of gamut label.

DrawGamutExcession

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public void DrawGamutExcession(Context context, float strength = 0.1)
Draw the region outside the sRGB gamut.
Parameters:
context (Context)Graphics context.
strength (float = 0.1)Hatching darkness, the default is 0.1.

DrawGrid

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public void DrawGrid(Context context, Pen border, Pen line)
Draw the Yxy grid lines.
Parameters:
context (Context)Context to draw with.
border (Pen)Pen for grid border.
line (Pen)Pen for grid lines.

DrawGrid

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public void DrawGrid(Context context, Pen border, Pen majorLine, Pen minorLine)
Draw the Yxy grid lines.
Parameters:
context (Context)Context to draw with.
border (Pen)Pen for grid border.
majorLine (Pen)Pen for 0.1 grid lines.
minorLine (Pen)Pen for 0.05 grid lines.

DrawGridLabels

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public void DrawGridLabels(Context context, Font font, Color colour)
Draw the grid labels. Note that the labels exceed the Frame rectangle and are typically not included.
Parameters:
context (Context)Graphics context.
font (Font)Font to use.
colour (Color)Colour of labels.

DrawPlanckianLocus

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public void DrawPlanckianLocus(Context context, Font font, float width, Color colour1000, Color colourInfinite)
Draw the Planckian locus.
Parameters:
context (Context)Graphics context.
font (Font)Font to use for iso-planckian labels, may be null.
width (float)Width of locus lines.
colour1000 (Color)Colour at 1000K.
colourInfinite (Color)Colour at infinite temperature.

DrawPurpleShadow

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public void DrawPurpleShadow(Context context, float darkness = 0.08)
Draw a drop shadow along the line of purples.
Parameters:
context (Context)Graphics context.
darkness (float = 0.08)Darkness of shadow. The default is 0.08.

DrawSpectralLoci

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public void DrawSpectralLoci(Context context, Font font, Color colour)
Draw the spectral loci at ~5nm intervals.
Parameters:
context (Context)Graphics context.
font (Font)Font to use.
colour (Color)Colour to use.

DrawSpectralLocus

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public void DrawSpectralLocus(Context context, float width, Color colour)
Draw the spectral locus and the line of purples.
Parameters:
context (Context)Graphics context.
width (float)Width of boundary curve.
colour (Color)Colour of edges.

LimitChromaticityToGrid

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public static bool LimitChromaticityToGrid(float x, float y, out float xm, out float ym)
Limit a chromaticity coordinate to the interior of the grid, thus avoiding colours exceeding the chromaticity diagram.
Parameters:
x (float)Original x coordinate.
y (float)Original y coordinate.
xm (out float)Projected x coordinate.
ym (out float)Projected y coordinate.
Returns: True if coordinate had to be projected.

LimitChromaticityToSpectrum

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public static bool LimitChromaticityToSpectrum(float x, float y, out float xm, out float ym)
Limit a chromaticity coordinate to the interior of the spectrum, thus avoiding a imaginary colours.
Parameters:
x (float)Original x coordinate.
y (float)Original y coordinate.
xm (out float)Projected x coordinate.
ym (out float)Projected y coordinate.
Returns: True if coordinate had to be projected.