iCollisionContext

Contents, API Reference, Interfaces, iCollisionContext

Interface iCollisionContext

Description

Represents a state of dynamic collision for an iMesh.

Defined in SDKRoot/include/i_pathengine.h.

iCollisionContext can be used to represent either an actual state of collision in the game world, or to represent an AI's current understanding about the state of collision in the world.
The iCollisionContext object stores a set of agents on that mesh. When you pass the collision context in to pathfinding or collision queries on the mesh, those agents will automatically be included in the pathfinding or collision.
iCollisionContext objects store some preprocess about this set of agents and automatically update this preprocess when agents move or are destroyed.

Refer to this page for a discussion of run-time obstacle management.

Construction and Deletion

iCollisionContext objects can be constructed with iMesh::newContext().
iCollisionContext objects can be deleted explicitly by calling delete on the pointer or by calling the object's destroy() function. All iCollisionContext objects are deleted by a call to iPathEngine::deleteAllObjects().
A pointer to an iCollisionContext object must not be used after the object has been deleted.

All collision contexts created for a mesh get destroyed automatically when the mesh is destroyed.

Methods:

addAgent		Adds a specified agent to this context.
addObstacleSet		Adds a free standing obstacle set to this context.
addRunTimeOffMeshConnection		Tells PathEngine about the possibility for agents to move 'off-mesh' between a pair of endpoints, with this movement possibility specified completely dynamically at run-time.
clearOverlayConnectionPenalties		Clears any connection penalties previously set with iCollisionContext::setOverlayConnectionPenalty().
clearQueryBounds		Clears any query bounds previously set for this context.
clearRunTimeOffMeshConnections		Removes any run-time off-mesh connections associated with this context.
getAgent		Provided for iterating through the set of agents in a context.
getNumberOfAgents		Tells you how many agents are currently included in the context.
getNumberOfObstacleSets		Helper method for iterating through obstacle sets in a context.
getObstacleSet		Helper method for iterating through obstacle sets in a context.
getOverlayConnectionPenalty		Helper method for querying the value of overlay connection penalties set previously for this context (with iCollisionContext::setOverlayConnectionPenalty()).
hasOverlayConnectionPenalties		Helper method for testing if any overlay connection penalties are set for a context.
includes		Tells you if a specified agent is included directly in this context.
removeAgent		Removes a specified agent from this context.
removeObstacleSet		Removes a free standing obstacle set to this context.
removeRunTimeOffMeshConnection		Removes a run-time off-mesh connection previously added to this context with iCollisionContext::addRunTimeOffMeshConnection().
setOverlayConnectionPenalty		Enables the penalty values associated with off-mesh connection to be overlaid and managed dynamically.
setQueryBounds		Sets a rectangular region outside which PathEngine may discard potential paths.
setSurfaceTypeTraverseCost		Associates a traverse cost with regions marked with a specified surface type.
setSurfaceTypeTraverseCostDirection		Associates a direction with the traverse cost for regions marked with a specified surface type.
updateCollisionPreprocessFor		Enables the application to force generation of collision preprocess associated with the collision context.
updatePathfindingPreprocessFor		Enables the application to force generation of pathfinding preprocess associated with the collision context.

next: iCollisionContext::addAgent()