ColourShader

public abstract class ColourShader

Base class for all colour shaders.

Methods

ColourAt

public abstract Color ColourAt(Ray ray, IObjectStack stack)

Evaluate this shader at a specific ray location.

Parameters:

ray (Ray)	Coincident ray.
stack (IObjectStack)	Object stack context.

Dilate

public ColourShader Dilate(double sx, double sy)

Apply a dilation (or scaling) transformation to this shader.

Parameters:

sx (double)	Horizontal dilation.
sy (double)	Vertical dilation.

Returns: Dilated shader.

Fade

public ColourShader Fade(ValueShader transparency, bool combine)

Add a transparency layer to this shader.

Parameters:

transparency (ValueShader)	Transparency layer.
combine (bool)	If true, overlay transparency is combined with existing transparency. If false, overlay transparency overrules the existing transparency.

Returns: Modified shader.

Fade

public ColourShader Fade(ValueShader transparency)

Add a transparency layer to this shader.

Parameters:

transparency (ValueShader)

Transparency layer.

Returns: Modified shader.

ResolveColour

protected Color ResolveColour(Color colour, Ray ray, IObjectStack stack)

Utility function for resolving a colour with the background.

Parameters:

colour (Color)	Colour to resolve.
ray (Ray)	Ray associated with colour location.
stack (IObjectStack)	Object stack context.

Returns: Resolved colour.

Rotate

public ColourShader Rotate(Angle angle)

Apply a rotation transformation to this shader.

Parameters:

angle (Angle)

Rotation angle (counter-clockwise).

Returns: Rotated shader.

Transform

public ColourShader Transform(Transform2D transform)

Apply a custom transformation to this shader.

Parameters:

transform (Transform2D)

Transformation.

Returns: Transformed shader.

Translate

public ColourShader Translate(double dx, double dy)

Apply a translation transformation to this shader.

Parameters:

dx (double)	Horizontal translation.
dy (double)	Vertical translation.

Returns: Translated shader.

TryParse

public static bool TryParse(string description, out string message, out ColourShader shader)

Try and parse a string description.

Parameters:

description (string)	Textual description.
message (out string)	On failure, a description of the problem will be outputted here.
shader (out ColourShader)	On success, a shader will be outputted here.

Returns: True on success, false on failure.

Convertors

Operation			Result	Description
	implicit	Color	ColourShader	Create a solid fill shader.
	implicit	string	ColourShader	Attempt to parse a shader description.