LsgNode Struct Reference

Scene graph hierarchy base class. More...

#include <node.h>

Collaboration diagram for LsgNode:

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Data Fields
LsgObject	super
LsgBBox *	bbox
int	dirty
void(*	clean )(LsgNode *self)
void(*	update )(LsgNode *self, float now)
void(*	display )(LsgNode *self, LsgFrustum *frustum)
int(*	collide )(LsgNode *self, Vertex v, Vertex nearest)
Related Functions
(Note that these are not member functions.)
void	LsgNode_init (LsgNode *self)
void	LsgNode_clean (LsgNode *self)
void	LsgNode_update (LsgNode *self, float now)
void	LsgNode_display (LsgNode *self, LsgFrustum *frustum)
int	LsgNode_collide (LsgNode *self, Vertex v, Vertex nearest)
void	LsgNode_destroy (LsgNode *self)

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Detailed Description

Scene graph hierarchy base class.

Abstract base class for the scene graph class hierarchy.

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Friends And Related Function Documentation

void LsgNode_init (  LsgNode *  self  )  [related]

Constructor for LsgNode. Initially clear the bounding box and set the dirty flag to make the first call to update recompute the complete bounding box tree. Parameters: self  The instance variable

void LsgNode_clean (  LsgNode *  self  )  [related]

Clean the node by unsetting the dirty flag. Parameters: self  The instance variable

void LsgNode_update (  LsgNode *  self, float  now )  [related]

Update the node. Does nothing at all. Parameters: self  The instance variable

void LsgNode_display (  LsgNode *  self, LsgFrustum *  frustum )  [related]

Display this node. Does nothing at all. Parameters: self  The instance variable frustum  The view frustum transformed to the local coordinat system

int LsgNode_collide (  LsgNode *  self, Vertex  v, Vertex  nearest )  [related]

Check collision with this node. Delegate collision detection to bounding box if it is valid. Otherwise always return 0. The value of nearest is not defined if the bounding box is not valid. Parameters: self  The instance variable v  Some vertex nearest  The buffer to store the vertex nearest to v that would cause a collision. May be NULL to indicate that the computation is not neccessary. Returns: 0 if bounding box is not valid, otherwise the return value of bbox_collide with the same vertex.

void LsgNode_destroy (  LsgNode *  self  )  [related]

Destructor for LsgNode. Destroy the bounding box. Parameters: self  The instance variable

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Field Documentation

int LsgNode::dirty

Flag to indicate a changed boundig box. Parents should check this flag after calling update and update their own bounding boxes if necessary.

void(* LsgNode::clean)(LsgNode* self)

Mark this node as having any changes processed. Call after running update to ensure later calls to update don't have process to reevaluate unchanged nodes. Parameters: self  The instance variable

void(* LsgNode::update)(LsgNode* self, float now)

Update this node to accommodate to passingtime. Parameters: self  The instance variable now  The current time

void(* LsgNode::display)(LsgNode* self, LsgFrustum* frustum)

Display this node. Parameters: self  The instance variable frustum  The viewing frustum transformed to the local coordinate system

int(* LsgNode::collide)(LsgNode* self, Vertex v, Vertex nearest)

Check for collision and calculate nearest vertex if asked for. Parameters: self  The instance variable v  Some vertex nearest  The buffer to store the vertex nearest to v that would cause a collision. May be NULL to indicate that the computation is not neccessary. Returns: 1 if the vertex v collides with the node, 0 otherwise

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The documentation for this struct was generated from the following file:

• node.h

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(c) 2003, by Enno Cramer
generated on 13 Jul 2003
lescegra - doxygen