virtualx-engine/thirdparty/rvo2/rvo2_2d/RVOSimulator2d.h
2023-06-13 21:13:21 -03:00

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/*
* RVOSimulator.h
* RVO2 Library
*
* SPDX-FileCopyrightText: 2008 University of North Carolina at Chapel Hill
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Please send all bug reports to <geom@cs.unc.edu>.
*
* The authors may be contacted via:
*
* Jur van den Berg, Stephen J. Guy, Jamie Snape, Ming C. Lin, Dinesh Manocha
* Dept. of Computer Science
* 201 S. Columbia St.
* Frederick P. Brooks, Jr. Computer Science Bldg.
* Chapel Hill, N.C. 27599-3175
* United States of America
*
* <https://gamma.cs.unc.edu/RVO2/>
*/
#ifndef RVO2D_RVO_SIMULATOR_H_
#define RVO2D_RVO_SIMULATOR_H_
/**
* @file RVOSimulator2d.h
* @brief Declares and defines the RVOSimulator2D class.
*/
#include <cstddef>
#include <vector>
namespace RVO2D {
class Agent2D;
class KdTree2D;
class Line;
class Obstacle2D;
class Vector2;
/**
* @relates RVOSimulator2D
* @brief Error value. A value equal to the largest unsigned integer that is
* returned in case of an error by functions in RVO::RVOSimulator.
*/
extern const std::size_t RVO2D_ERROR;
/**
* @brief Defines the simulation. The main class of the library that contains
* all simulation functionality.
*/
class RVOSimulator2D {
public:
/**
* @brief Constructs a simulator instance.
*/
RVOSimulator2D();
/**
* @brief Constructs a simulator instance and sets the default
* properties for any new agent that is added.
* @param[in] timeStep The time step of the simulation. Must be
* positive.
* @param[in] neighborDist The default maximum distance center-point to
* center-point to other agents a new agent takes
* into account in the navigation. The larger this
* number, the longer he running time of the
* simulation. If the number is too low, the
* simulation will not be safe. Must be
* non-negative.
* @param[in] maxNeighbors The default maximum number of other agents a
* new agent takes into account in the navigation.
* The larger this number, the longer the running
* time of the simulation. If the number is too
* low, the simulation will not be safe.
* @param[in] timeHorizon The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to other
* agents. The larger this number, the sooner an
* agent will respond to the presence of other
* agents, but the less freedom the agent has in
* choosing its velocities. Must be positive.
* @param[in] timeHorizonObst The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to obstacles.
* The larger this number, the sooner an agent will
* respond to the presence of obstacles, but the
* less freedom the agent has in choosing its
* velocities. Must be positive.
* @param[in] radius The default radius of a new agent. Must be
* non-negative.
* @param[in] maxSpeed The default maximum speed of a new agent. Must
* be non-negative.
*/
RVOSimulator2D(float timeStep, float neighborDist, std::size_t maxNeighbors,
float timeHorizon, float timeHorizonObst, float radius,
float maxSpeed);
/**
* @brief Constructs a simulator instance and sets the default properties
* for any new agent that is added.
* @param[in] timeStep The time step of the simulation. Must be
* positive.
* @param[in] neighborDist The default maximum distance center-point to
* center-point to other agents a new agent takes
* into account in the navigation. The larger this
* number, the longer he running time of the
* simulation. If the number is too low, the
* simulation will not be safe. Must be
* non-negative.
* @param[in] maxNeighbors The default maximum number of other agents a new
* agent takes into account in the navigation. The
* larger this number, the longer the running time
* of the simulation. If the number is too low, the
* simulation will not be safe.
* @param[in] timeHorizon The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to other
* agents. The larger this number, the sooner an
* agent will respond to the presence of other
* agents, but the less freedom the agent has in
* choosing its velocities. Must be positive.
* @param[in] timeHorizonObst The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to obstacles.
* The larger this number, the sooner an agent will
* respond to the presence of obstacles, but the
* less freedom the agent has in choosing its
* velocities. Must be positive.
* @param[in] radius The default radius of a new agent. Must be
* non-negative.
* @param[in] maxSpeed The default maximum speed of a new agent. Must
* be non-negative.
* @param[in] velocity The default initial two-dimensional linear
* velocity of a new agent.
*/
RVOSimulator2D(float timeStep, float neighborDist, std::size_t maxNeighbors,
float timeHorizon, float timeHorizonObst, float radius,
float maxSpeed, const Vector2 &velocity);
/**
* @brief Destroys this simulator instance.
*/
~RVOSimulator2D();
/**
* @brief Adds a new agent with default properties to the simulation.
* @param[in] position The two-dimensional starting position of this agent.
* @return The number of the agent, or RVO::RVO2D_ERROR when the agent
* defaults have not been set.
*/
std::size_t addAgent(const Vector2 &position);
/**
* @brief Adds a new agent to the simulation.
* @param[in] position The two-dimensional starting position of this
* agent.
* @param[in] neighborDist The maximum distance center-point to
* center-point to other agents this agent takes
* into account in the navigation. The larger this
* number, the longer the running time of the
* simulation. If the number is too low, the
* simulation will not be safe. Must be
* non-negative.
* @param[in] maxNeighbors The maximum number of other agents this agent
* takes into account in the navigation. The larger
* this number, the longer the running time of the
* simulation. If the number is too low, the
* simulation will not be safe.
* @param[in] timeHorizon The minimal amount of time for which this
* agent's velocities that are computed by the
* simulation are safe with respect to other
* agents. The larger this number, the sooner this
* agent will respond to the presence of other
* agents, but the less freedom this agent has in
* choosing its velocities. Must be positive.
* @param[in] timeHorizonObst The minimal amount of time for which this
* agent's velocities that are computed by the
* simulation are safe with respect to obstacles
* The larger this number, the sooner this agent
* will respond to the presence of obstacles, but
* the less freedom this agent has in choosing its
* velocities. Must be positive.
* @param[in] radius The radius of this agent. Must be non-negative.
* @param[in] maxSpeed The maximum speed of this agent. Must be
* non-negative.
* @return The number of the agent.
*/
std::size_t addAgent(const Vector2 &position, float neighborDist,
std::size_t maxNeighbors, float timeHorizon,
float timeHorizonObst, float radius, float maxSpeed);
/**
* @brief Adds a new agent to the simulation.
* @param[in] position The two-dimensional starting position of this
* agent.
* @param[in] neighborDist The maximum distance center-point to
* center-point to other agents this agent takes
* into account in the navigation. The larger this
* number, the longer the running time of the
* simulation. If the number is too low, the
* simulation will not be safe. Must be
* non-negative.
* @param[in] maxNeighbors The maximum number of other agents this agent
* takes into account in the navigation. The larger
* this number, the longer the running time of the
* simulation. If the number is too low, the
* simulation will not be safe.
* @param[in] timeHorizon The minimal amount of time for which this
* agent's velocities that are computed by the
* simulation are safe with respect to other
* agents. The larger this number, the sooner this
* agent will respond to the presence of other
* agents, but the less freedom this agent has in
* choosing its velocities. Must be positive.
* @param[in] timeHorizonObst The minimal amount of time for which this
* agent's velocities that are computed by the
* simulation are safe with respect to obstacles.
* The larger this number, the sooner this agent
* will respond to the presence of obstacles, but
* the less freedom this agent has in choosing its
* velocities. Must be positive.
* @param[in] radius The radius of this agent. Must be non-negative.
* @param[in] maxSpeed The maximum speed of this agent. Must be
* non-negative.
* @param[in] velocity The initial two-dimensional linear velocity of
* this agent.
* @return The number of the agent.
*/
std::size_t addAgent(const Vector2 &position, float neighborDist,
std::size_t maxNeighbors, float timeHorizon,
float timeHorizonObst, float radius, float maxSpeed,
const Vector2 &velocity);
/**
* @brief Adds a new obstacle to the simulation.
* @param[in] vertices List of the vertices of the polygonal obstacle in
* counterclockwise order.
* @return The number of the first vertex of the obstacle, or
* RVO::RVO2D_ERROR when the number of vertices is less than two.
* @note To add a "negative" obstacle, e.g., a bounding polygon around
* the environment, the vertices should be listed in clockwise
* order.
*/
std::size_t addObstacle(const std::vector<Vector2> &vertices);
/**
* @brief Lets the simulator perform a simulation step and updates the
* two-dimensional position and two-dimensional velocity of each agent.
*/
void doStep();
/**
* @brief Returns the specified agent neighbor of the specified agent.
* @param[in] agentNo The number of the agent whose agent neighbor is to be
* retrieved.
* @param[in] neighborNo The number of the agent neighbor to be retrieved.
* @return The number of the neighboring agent.
*/
std::size_t getAgentAgentNeighbor(std::size_t agentNo,
std::size_t neighborNo) const;
/**
* @brief Returns the maximum neighbor count of a specified agent.
* @param[in] agentNo The number of the agent whose maximum neighbor count is
* to be retrieved.
* @return The present maximum neighbor count of the agent.
*/
std::size_t getAgentMaxNeighbors(std::size_t agentNo) const;
/**
* @brief Returns the maximum speed of a specified agent.
* @param[in] agentNo The number of the agent whose maximum speed is to be
* retrieved.
* @return The present maximum speed of the agent.
*/
float getAgentMaxSpeed(std::size_t agentNo) const;
/**
* @brief Returns the maximum neighbor distance of a specified agent.
* @param[in] agentNo The number of the agent whose maximum neighbor distance
* is to be retrieved.
* @return The present maximum neighbor distance of the agent.
*/
float getAgentNeighborDist(std::size_t agentNo) const;
/**
* @brief Returns the count of agent neighbors taken into account to
* compute the current velocity for the specified agent.
* @param[in] agentNo The number of the agent whose count of agent neighbors
* is to be retrieved.
* @return The count of agent neighbors taken into account to compute the
* current velocity for the specified agent.
*/
std::size_t getAgentNumAgentNeighbors(std::size_t agentNo) const;
/**
* @brief Returns the count of obstacle neighbors taken into account to
* compute the current velocity for the specified agent.
* @param[in] agentNo The number of the agent whose count of obstacle
* neighbors is to be retrieved.
* @return The count of obstacle neighbors taken into account to compute
* the current velocity for the specified agent.
*/
std::size_t getAgentNumObstacleNeighbors(std::size_t agentNo) const;
/**
* @brief Returns the count of ORCA constraints used to compute the
* current velocity for the specified agent.
* @param[in] agentNo The number of the agent whose count of ORCA constraints
* is to be retrieved.
* @return The count of ORCA constraints used to compute the current
* velocity for the specified agent.
*/
std::size_t getAgentNumORCALines(std::size_t agentNo) const;
/**
* @brief Returns the specified obstacle neighbor of the specified agent.
* @param[in] agentNo The number of the agent whose obstacle neighbor is to
* be retrieved.
* @param[in] neighborNo The number of the obstacle neighbor to be retrieved.
* @return The number of the first vertex of the neighboring obstacle edge.
*/
std::size_t getAgentObstacleNeighbor(std::size_t agentNo,
std::size_t neighborNo) const;
/**
* @brief Returns the specified ORCA constraint of the specified agent.
* @param[in] agentNo The number of the agent whose ORCA constraint is to be
* retrieved.
* @param[in] lineNo The number of the ORCA constraint to be retrieved.
* @return A line representing the specified ORCA constraint.
* @note The half-plane to the left of the line is the region of
* permissible velocities with respect to the specified ORCA
* constraint.
*/
const Line &getAgentORCALine(std::size_t agentNo, std::size_t lineNo) const;
/**
* @brief Returns the two-dimensional position of a specified agent.
* @param[in] agentNo The number of the agent whose two-dimensional position
* is to be retrieved.
* @return The present two-dimensional position of the center of the agent.
*/
const Vector2 &getAgentPosition(std::size_t agentNo) const;
/**
* @brief Returns the two-dimensional preferred velocity of a specified
* agent.
* @param[in] agentNo The number of the agent whose two-dimensional preferred
* velocity is to be retrieved.
* @return The present two-dimensional preferred velocity of the agent.
*/
const Vector2 &getAgentPrefVelocity(std::size_t agentNo) const;
/**
* @brief Returns the radius of a specified agent.
* @param[in] agentNo The number of the agent whose radius is to be retrieved.
* @return The present radius of the agent.
*/
float getAgentRadius(std::size_t agentNo) const;
/**
* @brief Returns the time horizon of a specified agent.
* @param[in] agentNo The number of the agent whose time horizon is to be
* retrieved.
* @return The present time horizon of the agent.
*/
float getAgentTimeHorizon(std::size_t agentNo) const;
/**
* @brief Returns the time horizon with respect to obstacles of a
* specified agent.
* @param[in] agentNo The number of the agent whose time horizon with respect
* to obstacles is to be retrieved.
* @return The present time horizon with respect to obstacles of the agent.
*/
float getAgentTimeHorizonObst(std::size_t agentNo) const;
/**
* @brief Returns the two-dimensional linear velocity of a specified
* agent.
* @param[in] agentNo The number of the agent whose two-dimensional linear
* velocity is to be retrieved.
* @return The present two-dimensional linear velocity of the agent.
*/
const Vector2 &getAgentVelocity(std::size_t agentNo) const;
/**
* @brief Returns the global time of the simulation.
* @return The present global time of the simulation (zero initially).
*/
float getGlobalTime() const { return globalTime_; }
/**
* @brief Returns the count of agents in the simulation.
* @return The count of agents in the simulation.
*/
std::size_t getNumAgents() const { return agents_.size(); }
/**
* @brief Returns the count of obstacle vertices in the simulation.
* @return The count of obstacle vertices in the simulation.
*/
std::size_t getNumObstacleVertices() const { return obstacles_.size(); }
/**
* @brief Returns the two-dimensional position of a specified obstacle
* vertex.
* @param[in] vertexNo The number of the obstacle vertex to be retrieved.
* @return The two-dimensional position of the specified obstacle vertex.
*/
const Vector2 &getObstacleVertex(std::size_t vertexNo) const;
/**
* @brief Returns the number of the obstacle vertex succeeding the
* specified obstacle vertex in its polygon.
* @param[in] vertexNo The number of the obstacle vertex whose successor is to
* be retrieved.
* @return The number of the obstacle vertex succeeding the specified
* obstacle vertex in its polygon.
*/
std::size_t getNextObstacleVertexNo(std::size_t vertexNo) const;
/**
* @brief Returns the number of the obstacle vertex preceding the
* specified obstacle vertex in its polygon.
* @param[in] vertexNo The number of the obstacle vertex whose predecessor is
* to be retrieved.
* @return The number of the obstacle vertex preceding the specified
* obstacle vertex in its polygon.
*/
std::size_t getPrevObstacleVertexNo(std::size_t vertexNo) const;
/**
* @brief Returns the time step of the simulation.
* @return The present time step of the simulation.
*/
float getTimeStep() const { return timeStep_; }
/**
* @brief Processes the obstacles that have been added so that they are
* accounted for in the simulation.
* @note Obstacles added to the simulation after this function has been
* called are not accounted for in the simulation.
*/
void processObstacles();
/**
* @brief Performs a visibility query between the two specified points
* with respect to the obstacles
* @param[in] point1 The first point of the query.
* @param[in] point2 The second point of the query.
* @return A boolean specifying whether the two points are mutually
* visible. Returns true when the obstacles have not been
* processed.
*/
bool queryVisibility(const Vector2 &point1, const Vector2 &point2) const;
/**
* @brief Performs a visibility query between the two specified points
* with respect to the obstacles
* @param[in] point1 The first point of the query.
* @param[in] point2 The second point of the query.
* @param[in] radius The minimal distance between the line connecting the two
* points and the obstacles in order for the points to be
* mutually visible. Must be non-negative.
* @return A boolean specifying whether the two points are mutually
* visible. Returns true when the obstacles have not been
* processed.
*/
bool queryVisibility(const Vector2 &point1, const Vector2 &point2,
float radius) const;
/**
* @brief Sets the default properties for any new agent that is added.
* @param[in] neighborDist The default maximum distance center-point to
* center-point to other agents a new agent takes
* into account in the navigation. The larger this
* number, the longer he running time of the
* simulation. If the number is too low, the
* simulation will not be safe. Must be
* non-negative.
* @param[in] maxNeighbors The default maximum number of other agents a new
* agent takes into account in the navigation. The
* larger this number, the longer the running time
* of the simulation. If the number is too low, the
* simulation will not be safe.
* @param[in] timeHorizon The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to other
* agents. The larger this number, the sooner an
* agent will respond to the presence of other
* agents, but the less freedom the agent has in
* choosing its velocities. Must be positive.
* @param[in] timeHorizonObst The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to obstacles.
* The larger this number, the sooner an agent will
* respond to the presence of obstacles, but the
* less freedom the agent has in choosing its
* velocities. Must be positive.
* @param[in] radius The default radius of a new agent. Must be
* non-negative.
* @param[in] maxSpeed The default maximum speed of a new agent. Must
* be non-negative.
*/
void setAgentDefaults(float neighborDist, std::size_t maxNeighbors,
float timeHorizon, float timeHorizonObst, float radius,
float maxSpeed);
/**
* @brief Sets the default properties for any new agent that is added.
* @param[in] neighborDist The default maximum distance center-point to
* center-point to other agents a new agent takes
* into account in the navigation. The larger this
* number, the longer he running time of the
* simulation. If the number is too low, the
* simulation will not be safe. Must be
* non-negative.
* @param[in] maxNeighbors The default maximum number of other agents a new
* agent takes into account in the navigation. The
* larger this number, the longer the running time
* of the simulation. If the number is too low, the
* simulation will not be safe.
* @param[in] timeHorizon The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to other
* agents. The larger this number, the sooner an
* agent will respond to the presence of other
* agents, but the less freedom the agent has in
* choosing its velocities. Must be positive.
* @param[in] timeHorizonObst The default minimal amount of time for which a
* new agent's velocities that are computed by the
* simulation are safe with respect to obstacles.
* The larger this number, the sooner an agent will
* respond to the presence of obstacles, but the
* less freedom the agent has in choosing its
* velocities. Must be positive.
* @param[in] radius The default radius of a new agent. Must be
* non-negative.
* @param[in] maxSpeed The default maximum speed of a new agent. Must
* be non-negative.
* @param[in] velocity The default initial two-dimensional linear
* velocity of a new agent.
*/
void setAgentDefaults(float neighborDist, std::size_t maxNeighbors,
float timeHorizon, float timeHorizonObst, float radius,
float maxSpeed, const Vector2 &velocity);
/**
* @brief Sets the maximum neighbor count of a specified agent.
* @param[in] agentNo The number of the agent whose maximum neighbor
* count is to be modified.
* @param[in] maxNeighbors The replacement maximum neighbor count.
*/
void setAgentMaxNeighbors(std::size_t agentNo, std::size_t maxNeighbors);
/**
* @brief Sets the maximum speed of a specified agent.
* @param[in] agentNo The number of the agent whose maximum speed is to be
* modified.
* @param[in] maxSpeed The replacement maximum speed. Must be non-negative.
*/
void setAgentMaxSpeed(std::size_t agentNo, float maxSpeed);
/**
* @brief Sets the maximum neighbor distance of a specified agent.
* @param[in] agentNo The number of the agent whose maximum neighbor
* distance is to be modified.
* @param[in] neighborDist The replacement maximum neighbor distance. Must be
* non-negative.
*/
void setAgentNeighborDist(std::size_t agentNo, float neighborDist);
/**
* @brief Sets the two-dimensional position of a specified agent.
* @param[in] agentNo The number of the agent whose two-dimensional position
* is to be modified.
* @param[in] position The replacement of the two-dimensional position.
*/
void setAgentPosition(std::size_t agentNo, const Vector2 &position);
/**
* @brief Sets the two-dimensional preferred velocity of a specified
* agent.
* @param[in] agentNo The number of the agent whose two-dimensional
* preferred velocity is to be modified.
* @param[in] prefVelocity The replacement of the two-dimensional preferred
* velocity.
*/
void setAgentPrefVelocity(std::size_t agentNo, const Vector2 &prefVelocity);
/**
* @brief Sets the radius of a specified agent.
* @param[in] agentNo The number of the agent whose radius is to be modified.
* @param[in] radius The replacement radius. Must be non-negative.
*/
void setAgentRadius(std::size_t agentNo, float radius);
/**
* @brief Sets the time horizon of a specified agent with respect to other
* agents.
* @param[in] agentNo The number of the agent whose time horizon is to be
* modified.
* @param[in] timeHorizon The replacement time horizon with respect to other
* agents. Must be positive.
*/
void setAgentTimeHorizon(std::size_t agentNo, float timeHorizon);
/**
* @brief Sets the time horizon of a specified agent with respect to
* obstacles.
* @param[in] agentNo The number of the agent whose time horizon with
* respect to obstacles is to be modified.
* @param[in] timeHorizonObst The replacement time horizon with respect to
* obstacles. Must be positive.
*/
void setAgentTimeHorizonObst(std::size_t agentNo, float timeHorizonObst);
/**
* @brief Sets the two-dimensional linear velocity of a specified agent.
* @param[in] agentNo The number of the agent whose two-dimensional linear
* velocity is to be modified.
* @param[in] velocity The replacement two-dimensional linear velocity.
*/
void setAgentVelocity(std::size_t agentNo, const Vector2 &velocity);
/**
* @brief Sets the time step of the simulation.
* @param[in] timeStep The time step of the simulation. Must be positive.
*/
void setTimeStep(float timeStep) { timeStep_ = timeStep; }
public:
/* Not implemented. */
RVOSimulator2D(const RVOSimulator2D &other);
/* Not implemented. */
RVOSimulator2D &operator=(const RVOSimulator2D &other);
std::vector<Agent2D *> agents_;
std::vector<Obstacle2D *> obstacles_;
Agent2D *defaultAgent_;
KdTree2D *kdTree_;
float globalTime_;
float timeStep_;
friend class KdTree2D;
};
} /* namespace RVO2D */
#endif /* RVO2D_RVO_SIMULATOR_H_ */