steer::EvadeComponent Class Reference

An example implementation of the evasion steering behavior. The agent will flee from the target while predicting it's trajectory. More...

#include <EvadeComponent.hpp>

Inheritance diagram for steer::EvadeComponent:

Public Member Functions
	EvadeComponent (steer::BehaviorParameters *params)
void	setWeight (const float weight)
	Set the value of the weight multiplier for the Evade component.
float	getWeight () const
	Get the value of the weight multiplier for the Evade component.
void	setRotation (float r)
	Set the value of the Evade component rotation.
float	getRotation ()
	Get the value of the Evade component rotation.
virtual bool	on (steer::behaviorType behavior)
	This pure virtual function tests if a specific bit of m_iFlags is set using bitwise operations. Must be overridden in derived classes.
void	evadeOn ()
bool	isEvadeOn ()
void	evadeOff ()
void	setTargetAgent (steer::Agent *a)
steer::Agent *	getTargetAgent () const
virtual Vector2	Calculate ()
	A pure virtual method for calculating the steering vector.
void	Update (float dt)
Public Member Functions inherited from steer::Agent
	Agent ()
	Default constructor.
	Agent (steer::Vector2 position, float radius, steer::Vector2 velocity, steer::Vector2 heading, steer::Vector2 side, float mass, float maxSpeed, float maxForce, float maxTurnRate)
	Construct agent from values.
	Agent (steer::BehaviorParameters *params)
	Construct agent from struct of parameters.
virtual	~Agent ()
	Destructor.
steer::Vector2	getPosition () const
	Gets the position of the entity.
void	setPosition (steer::Vector2 newPosition)
	Sets the position of the entity.
float	getBoundingRadius () const
	Gets the bounding radius of the entity.
void	setBoundingRadius (float radius)
	Sets the bounding radius of the entity.
bool	taggedInGroup () const
	Gets the tagged status (tagged in a group) of the entity.
void	Tag ()
	Tags the entity for an action.
void	unTag ()
	Untags the entity.
steer::Vector2	getScale () const
	Returns the entity's scale.
void	setScale (steer::Vector2 val)
	Sets the entity's scale from an steer::Vector2.
void	setScale (float val)
	Sets the entity's scale from a float.
steer::Vector2	getVelocity () const
	Gets the velocity of the agent.
float	getMass () const
	Gets the mass of the agent. Mass is set on construction of the agent only.
steer::Vector2	getSide () const
	Gets the side vector (vector perpendicular to the direction the agent is heading) of the agent. Side is set on construction of the agent only.
void	setSide (const steer::Vector2 side)
	Sets the side vector (vector perpendicular to the direction the agent is heading) of the agent. Side is set on construction of the agent only.
float	getMaxSpeed () const
	Gets the max speed of the agent.
void	setMaxSpeed (float newSpeed)
	Sets the velocity of the agent.
float	getMaxForce () const
	Gets the max force of the agent.
void	setMaxForce (float maxForce)
	Sets the max force of the agent.
steer::Vector2	getForce () const
	Convenience method, gets the current steering force for the owner agent. Force is public data used for calculating steering force, therefore there is no setter.
bool	speedMaxedOut () const
	Determines if the speed of the agent is maxed out or not.
float	getSpeed () const
	Gets the speed of the agent.
float	getSpeedSquared () const
	Gets the speed squared of the agent.
steer::Vector2	getHeading () const
	Gets the heading of the agent.
void	setHeading (steer::Vector2 newHeading)
	Sets the heading of the agent.
bool	rotateHeadingToFacePosition (steer::Vector2 target)
	Returns true when the heading is rotated to the target position, returns false otherwise.
float	getMaxTurnRate () const
	Gets the max turn rate of the agent.
void	setMaxTurnRate (float maxTurnRate)
	Sets the max turn rate of the agent.
float	getForwardComponent ()
	Calculates the component of the steering force that is parallel with the vehicle heading.
float	getSideComponent ()
	Calculates the component of the steering force that is perpendicular with the vehicle heading.
void	setTarget (const steer::Vector2 target)
	Sets the current target for the owner agent.
steer::Vector2	getTarget () const
	Gets the current target for the owner agent.
void	setThreatRange (const float range)
	Set the value of the range the object of interest must be in to trigger evasive action.
float	getThreatRange () const
	Get the value of the range the object of interest must be in to trigger evasive action.
void	setDecelerationTweaker (const float deceleration)
	Set the value for tweaking deceleration for the arrive component.
float	getDecelerationTweaker () const
	Get the value for tweaking deceleration for the arrive component.
void	setWanderTarget (const steer::Vector2 target)
	Set the wander target.
steer::Vector2	getWanderTarget () const
	Get the wander target.
void	setWanderJitter (const float jitter)
	Set the wander jitter.
float	getWanderJitter () const
	Get the wander jitter.
void	setWanderRadius (const float radius)
	Set the radius that the agent will wander toward.
float	getWanderRadius () const
	Get the radius the agent is wandering toward.
void	setWanderDistance (const float distance)
	Set the distance the agent will wander.
float	getWanderDistance () const
	Get the distance the agent will wander.
void	setDistanceBuffer (const float buffer)
	Set the value for the buffer which dictates the minimum distance from a given area (for example, a hiding spot behind an obstacle).
float	getDistanceBuffer () const
	Get the value for the distance buffer (minimum distance between self and a given area).
void	setOffset (const steer::Vector2 offset)
	Sets the current steering offset for the owner agent - used for tweaking steering force.
steer::Vector2	getOffset () const
	Gets the current steering offset for the owner agent -.
void	createFeelers ()
	A method for creating the feelers used for obstacle and wall avoidance;.
float	boxLength () const
	Returns the value of box length used for obstacle and wall avoidance;.
void	setBoxLength (const float length)
	Returns the value of box length used for obstacle and wall avoidance;.
const std::vector < steer::Vector2 > &	getFeelers () const
	Returns a reference to the feelers used for obstacle and wall avoidance;.
virtual void	setSummingMethod (Uint32 sumMethod)
	A virtual method used for setting the summing method for steering forces.
virtual bool	accumulateForce (steer::Vector2 &startingForce, steer::Vector2 forceToAdd)
	A virtual method used to accumulate forces from a combination of behaviors. Does nothing, override and implement in derived classes.
virtual steer::Vector2	calculateWeightedSum ()
virtual steer::Vector2	calculatePrioritized ()
float	getElapsedTime ()
	Get the time elapsed since the last frame.
float	setElapsedTime (float e)
	Set the time elapsed since the last frame.

Additional Inherited Members
Public Attributes inherited from steer::Agent
steer::Vector2	m_agentPosition
	The Entity's internal position value.
steer::Vector2	m_scale
	The Entity's internal scale value.
bool	m_tag
float	m_boundingRadius
	Generic flag to indicate that the entity is flagged for some process.
steer::Vector2	m_steeringForce
	For calculating the steering force internally from all combined behaviors.
float	m_waypointSeekDistanceSquared
	the distance (squared) a vehicle has to be from a path waypoint before it starts seeking to the next waypoint
std::vector< steer::Vector2 >	m_feelers
	a vertex buffer to contain the feelers for wall avoidance
steer::Vector2	m_velocity
	Storage for the agent's velocity.
steer::Vector2	m_heading
	Storage for the agent's normalized vector pointing in the direction it is headed.
steer::Vector2	m_side
	A vector perpendicular to the direction the agent is heading.
float	m_mass
	Mass of the agent.
float	m_timeElapsed
	The time elapsed since the last frame - useful for some steering behavior calcuations.
steer::Vector2	m_offset
	any offset used for formations or offset pursuit
float	m_viewDistance
	how far the agent can 'see'
Uint32	m_deceleration
	Deceleration type (slow, normal, fast) - SEE DECLERATION ENUM in BEHAVIORHELPERS.HPP.
float	m_boxLength
	length of the 'detection box' utilized in obstacle avoidance
float	m_wallDetectionFeelerLength
	the length of the 'feeler/s' used in wall detection
float	m_maxSpeed
	The maximum speed at which the agent can travel.
float	m_maxForce
	The maximum force the agent can use to propel itself.
float	m_maxTurnRate
	The maximum rate at which the agent can rotate.
steer::Vector2	m_target
	For setting the agent's target.
float	m_threatRange
	Range the object of interest must be in to trigger evasive action.
float	m_decelerationTweaker
	Value used to tweak deceleration.
float	m_distanceBuffer
	Value used to set the distance buffer.
steer::Vector2	m_wanderTarget
	the current position on the wander circle the agent is attempting to steer towards
float	m_wanderJitter
	Amount of displacement along the constraining circle for the wandering agent.
float	m_wanderRadius
	The radius of the constraining circle for the wandering agent.
float	m_wanderDistance
	Distance the wander circle is projected in front of the agent.

Detailed Description

An example implementation of the evasion steering behavior. The agent will flee from the target while predicting it's trajectory.

Member Function Documentation

virtual bool steer::EvadeComponent::on ( steer::behaviorType  behavior )

inlinevirtual

This pure virtual function tests if a specific bit of m_iFlags is set using bitwise operations. Must be overridden in derived classes.

Parameters

behavior

- enum behaviorType.

Implements steer::Agent.

void steer::EvadeComponent::setWeight ( const float  weight )

inline

Set the value of the weight multiplier for the Evade component.

Parameters

weight

- a plain old float.

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The documentation for this class was generated from the following files:

• include/steeriously/components/EvadeComponent.hpp
• src/steeriously/components/EvadeComponent.cpp