collision.cpp File Reference

#include "collision.h"
#include <cmath>
#include "mapblock.h"
#include "map.h"
#include "nodedef.h"
#include "gamedef.h"
#include "serverenvironment.h"
#include "server/serveractiveobject.h"
#include "util/timetaker.h"
#include "profiler.h"

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Macros
#define	PROFILER_NAME(text)   (dynamic_cast<ServerEnvironment*>(env) ? ("Server: " text) : ("Client: " text))

Functions
CollisionAxis	axisAlignedCollision (const aabb3f &staticbox, const aabb3f &movingbox, const v3f speed, f32 *dtime)
bool	wouldCollideWithCeiling (const std::vector< NearbyCollisionInfo > &cinfo, const aabb3f &movingbox, f32 y_increase, f32 d)
static bool	add_area_node_boxes (const v3s16 min, const v3s16 max, IGameDef *gamedef, Environment *env, std::vector< NearbyCollisionInfo > &cinfo)
static void	add_object_boxes (Environment *env, const aabb3f &box_0, f32 dtime, const v3f pos_f, const v3f speed_f, ActiveObject *self, std::vector< NearbyCollisionInfo > &cinfo)
collisionMoveResult	collisionMoveSimple (Environment *env, IGameDef *gamedef, f32 pos_max_d, const aabb3f &box_0, f32 stepheight, f32 dtime, v3f *pos_f, v3f *speed_f, v3f accel_f, ActiveObject *self, bool collide_with_objects)
	Moves using a single iteration; speed should not exceed pos_max_d/dtime.
bool	collision_check_intersection (Environment *env, IGameDef *gamedef, const aabb3f &box_0, const v3f &pos_f, ActiveObject *self, bool collide_with_objects)
	A simpler version of "collisionMoveSimple" that only checks whether a collision occurs at the given position.

Macro Definition Documentation

PROFILER_NAME

#define PROFILER_NAME

(

text

)

(dynamic_cast<ServerEnvironment*>(env) ? ("Server: " text) : ("Client: " text))

Referenced by collision_check_intersection(), and collisionMoveSimple().

Function Documentation

add_area_node_boxes()

static bool add_area_node_boxes ( const v3s16 min, const v3s16 max, IGameDef * gamedef, Environment * env, std::vector< NearbyCollisionInfo > & cinfo )

static

References BS, CONTENT_IGNORE, MapNode::getCollisionBoxes(), MapNode::getContent(), Environment::getMap(), MapNode::getNeighbors(), Map::getNode(), getNodeBox(), IGameDef::getNodeDefManager(), ContentFeatures::groups, intToFloat(), itemgroup_get(), p(), and ContentFeatures::walkable.

Referenced by collision_check_intersection(), and collisionMoveSimple().

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add_object_boxes()

static void add_object_boxes ( Environment * env, const aabb3f & box_0, f32 dtime, const v3f pos_f, const v3f speed_f, ActiveObject * self, std::vector< NearbyCollisionInfo > & cinfo )

static

References BS, ClientEnvironment::getActiveObjects(), LocalPlayer::getCAO(), LocalPlayer::getCollisionbox(), ClientEnvironment::getLocalPlayer(), ServerEnvironment::getObjectsInsideRadius(), and LocalPlayer::getPosition().

Referenced by collision_check_intersection(), and collisionMoveSimple().

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axisAlignedCollision()

CollisionAxis axisAlignedCollision	(	const aabb3f &	staticbox,
		const aabb3f &	movingbox,
		const v3f	speed,
		f32 *	dtime )

References COLLISION_AXIS_NONE, COLLISION_AXIS_X, COLLISION_AXIS_Y, and COLLISION_AXIS_Z.

Referenced by collisionMoveSimple(), and TestCollision::testAxisAlignedCollision().

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collision_check_intersection()

bool collision_check_intersection	(	Environment *	env,
		IGameDef *	gamedef,
		const aabb3f &	box_0,
		const v3f &	pos_f,
		ActiveObject *	self = nullptr,
		bool	collide_with_objects = true )

A simpler version of "collisionMoveSimple" that only checks whether a collision occurs at the given position.

Parameters

self	(optional) ActiveObject to ignore in the collision detection.

Returns

true when box_0 truly intersects with a node or object. Touching faces are not counted as intersection.

References add_area_node_boxes(), add_object_boxes(), BS, floatToInt(), g_profiler, PRECISION_MICRO, PROFILER_NAME, and SPT_AVG.

Referenced by LocalPlayer::move().

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collisionMoveSimple()

collisionMoveResult collisionMoveSimple	(	Environment *	env,
		IGameDef *	gamedef,
		f32	pos_max_d,
		const aabb3f &	box_0,
		f32	stepheight,
		f32	dtime,
		v3f *	pos_f,
		v3f *	speed_f,
		v3f	accel_f,
		ActiveObject *	self = NULL,
		bool	collide_with_objects = true )

Moves using a single iteration; speed should not exceed pos_max_d/dtime.

Parameters

self	(optional) ActiveObject to ignore in the collision detection.

References add_area_node_boxes(), add_object_boxes(), CollisionInfo::axis, axisAlignedCollision(), BS, collisionMoveResult::collides, COLLISION_AXIS_NONE, COLLISION_AXIS_X, COLLISION_AXIS_Y, COLLISION_AXIS_Z, COLLISION_NODE, COLLISION_OBJECT, collisionMoveResult::collisions, DTIME_LIMIT, floatToInt(), g_profiler, MYMAX, MYMIN, CollisionInfo::new_pos, CollisionInfo::new_speed, CollisionInfo::node_p, CollisionInfo::object, CollisionInfo::old_speed, CollisionInfo::plane, PRECISION_MICRO, PROFILER_NAME, SPT_AVG, collisionMoveResult::standing_on_object, collisionMoveResult::touching_ground, CollisionInfo::type, warningstream, and wouldCollideWithCeiling().

Referenced by LocalPlayer::handleAutojump(), LocalPlayer::move(), LocalPlayer::old_move(), GenericCAO::step(), LuaEntitySAO::step(), and Particle::step().

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wouldCollideWithCeiling()

bool wouldCollideWithCeiling	(	const std::vector< NearbyCollisionInfo > &	cinfo,
		const aabb3f &	movingbox,
		f32	y_increase,
		f32	d )

Referenced by collisionMoveSimple().

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