EmptyStack

public sealed class EmptyStack : IObjectStack
Implements IObjextStack for an empty collection.

Constructors

EmptyStack

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public EmptyStack(Color colour)
Create a new, empty stack.
Parameters:
colour (Color)Default colour.

Methods

AllObjectsAbove

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public int[] AllObjectsAbove(double u, double v, int startAt)
Find all objects coincident with the (u,v) location at or above a given layer index.
Parameters:
u (double)U coordinate.
v (double)V coordinate.
startAt (int)Start layer. Objects on this layer are taken into account.
Returns: Array of all object indices coincident with (u,v) at or above the start layer.

AllObjectsBelow

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public int[] AllObjectsBelow(double u, double v, int startAt)
Find all objects coincident with the (u,v) location at or below a given layer index.
Parameters:
u (double)U coordinate.
v (double)V coordinate.
startAt (int)Start layer. Objects on this layer are taken into account.
Returns: Array of all object indices coincident with (u,v) at or below the start layer.

ContinueAndSample

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public Color ContinueAndSample(Ray ray)
Continue an existing ray.
Parameters:
ray (Ray)Ray to continue.
Returns: Colour at continued ray location.
Implements: ContinueAndSample

FirstObjectAbove

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public int FirstObjectAbove(double x, double y, int startAt)
Find the index of the first object at the (u,v) location at or above the given layer index.
Parameters:
x (double)U coordinate.
y (double)V coordinate.
startAt (int)Start layer. Objects on this layer are taken into account.
Returns: The index of the first object coincident with (u,v) at or above the start layer. Or, if no object was found, -1.
Implements: FirstObjectAbove

FirstObjectBelow

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public int FirstObjectBelow(double x, double y, int startAt)
Find the index of the first object at the (u,v) location at or below the given layer index.
Parameters:
x (double)U coordinate.
y (double)V coordinate.
startAt (int)Start layer. Objects on this layer are taken into account.
Returns: The index of the first object coincident with (u,v) at or below the start layer. Or, if no object was found, -1.
Implements: FirstObjectBelow

Sample

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public Color Sample(Ray ray)
Shoot a ray into the object stack and evaluate the colour.
Parameters:
ray (Ray)Ray to shoot.
Returns: Colour at ray location.
Implements: Sample