OccluderNode Class Reference

A node in the scene graph that can hold an occluder polygon, which must be a rectangle. More...

Inheritance diagram for OccluderNode:

List of all members.

Public Member Functions
	OccluderNode (string name)
	The default constructor creates a default occlusion polygon in the XZ plane (or XY plane in a y-up coordinate system).
float	getMinCoverage ()
	Returns the minimum screen coverage.
int	getNumVertices ()
	Returns the number of vertices in the occluder polygon.
Point3 const	getVertex (int n)
	Returns the nth vertex of the occluder polygon.
list	getVertices ()
bool	isDoubleSided ()
	Is this occluder double-sided.
	setDoubleSided (bool value)
	If true, the back-face will also be used to occlude.
	setMinCoverage (float value)
	Minimum screen coverage needed before occluder used.
	setVertices (Point3 const v0, Point3 const v1, Point3 const v2, Point3 const v3)
	Replaces the four vertices of the occluder polygon.
Static Public Member Functions
static TypeHandle	getClassType ()

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Detailed Description

A node in the scene graph that can hold an occluder polygon, which must be a rectangle.

When the occluder is activated with something like render.set_occluder(), then objects whose bouding volume lies entirely behind the occluder will not be rendered.

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Constructor & Destructor Documentation

OccluderNode

(

string

name

)

The default constructor creates a default occlusion polygon in the XZ plane (or XY plane in a y-up coordinate system).

Use the normal Panda set_pos(), set_hpr(), set_scale() to position it appropriately, or replace the vertices with set_vertices().

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Member Function Documentation

static TypeHandle getClassType

(

)

[static]

Reimplemented from PandaNode.

float getMinCoverage

(

)

Returns the minimum screen coverage.

int getNumVertices

(

)

Returns the number of vertices in the occluder polygon.

This should always return 4.

Point3 const getVertex

(

int

n

)

Returns the nth vertex of the occluder polygon.

list getVertices

(

)

bool isDoubleSided

(

)

Is this occluder double-sided.

setDoubleSided

(

bool

value

)

If true, the back-face will also be used to occlude.

setMinCoverage

(

float

value

)

Minimum screen coverage needed before occluder used.

Range should be 0 to 1. For example, setting to 0.2 would mean that the occluder needs to cover 20% of the screen to be considered.

setVertices	(	Point3 const	v0,
		Point3 const	v1,
		Point3 const	v2,
		Point3 const	v3
	)

Replaces the four vertices of the occluder polygon.

The vertices should be defined in a counterclockwise orientation when looking at the face of the occluder.