Unigine::Plugins::IG::CollisionSegment Class
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| Header: | #include <plugins/UnigineIG.h> |
This class is used to manage collision segments that are assigned to entities and used for collision detection.
Notice
IG plugin must be loaded.
A collision detection segment is a line segment along which collision testing is performed by the IG. When a collision detection segment intersects a polygon, the IG registers a collision by sending the corresponding notification.
Notice
Collision detection testing is performed by the IG every frame.
The segment is defined by specifying the locations of its endpoints with respect to the associated entity’s body coordinate system. Figure below illustrates five segments defined for an aircraft.
Collision detection volumes are tested segment-to-polygon. An entity will not perform collision detection segment testing against its own geometry.
If an entity is destroyed, all collision detection segments defined for that entity will also be destroyed.
CollisionSegment Class
Members
int getID ( ) const#
Returns the ID of the collision segment.Return value
Collision segment ID.Entity * getEntity ( ) const#
Returns the entity to which the collision segment is assigned.Return value
Entity to which the collision segment is assigned.bool isEnabled ( ) const#
Returns a value indicating if the collision segment is enabled.Return value
true if the collision segment is enabled; otherwise, falsevoid setEnabled ( bool value ) #
Enables or disables the collision segment.Arguments
- bool value - true to enable the collision segment; false - to disable it.
void setStartPoint ( const Math::vec3& point ) #
Sets the coordinates of the start point of the collision segment.Arguments
- const Math::vec3& point - Coordinates of the start point of the collision segment, in the coordinate system of the entity.
const Math::vec3& getStartPoint ( ) const#
Returns the current coordinates of the start point of the collision segment.Return value
Coordinates of the start point of the collision segment, in the coordinate system of the entity.void setEndPoint ( Math::vec3 point ) #
Sets the coordinates of the end point of the collision segment.Arguments
- Math::vec3 point - Coordinates of the end point of the collision segment, in the coordinate system of the entity.
Math::vec3 getEndPoint ( ) const#
Returns the current coordinates of the end point of the collision segment.Return value
Coordinates of the end point of the collision segment, in the coordinate system of the entity.void setMaterialMask ( int mask ) #
Sets the material mask for the collision segment. This parameter specifies the environmental and cultural features to be included in or excluded from consideration for collision testing.Arguments
- int mask - Integer representing a bit mask, each bit of which represents a range of material code values. Setting that bit to 1 will cause the IG to register hits with materials within the corresponding range.
int getMaterialMask ( ) const#
Gets the material mask for the collision segment. This parameter specifies the environmental and cultural features to be included in or excluded from consideration for collision testing.Return value
Integer representing a bit mask, each bit of which represents a range of material code values. Setting that bit to 1 will cause the IG to register hits with materials within the corresponding range.void * addOnCollisionDetectedCallback ( Unigine::CallbackBase3< CollisionSegment *, Ptr<Object>, Ptr<WorldIntersection>> * func ) #
Adds a callback function to be called when a collision with the collision segment is detected. This function can be used to define specific actions to be performed when a collision with the segment is detected. The signature of the callback function must be as follows:Source code (C++)
void(CollisionSegment *segment , ObjectPtr object, WorldIntersectionPtr wi);You can set a callback function as follows:
Source code (C++)
addOnCollisionDetectedCallback(MakeCallback(collision_callback_function_name));Example: Setting a collision detected callback for a collision segment of an entity
Source code (C++)
/// callback function to be called when a collision with the collision segment is detected
void my_callback(CollisionSegment *segment , ObjectPtr object, WorldIntersectionPtr wi)
{
// insert your code handling collision event here
}
// ...
// somewhere in code
void SomeClass::init()
{
// adding "my_callback" to be called when a collision with the segment is detected
ig_manager->getEntity(entity_id)->getCollisionSegment(segment_id)->addOnCollisionDetectedCallback(Unigine::MakeCallback( my_callback ));
}Arguments
- Unigine::CallbackBase3< CollisionSegment *, Ptr<Object>, Ptr<WorldIntersection>> * func - Callback function.
Return value
ID of the last added collision detected callback, if the callback was added successfully; otherwise, nullptr. This ID can be used to remove this callback when necessary.bool removeOnCollisionDetectedCallback ( void * id ) #
Removes the specified callback from the list of collision detected callbacks.Arguments
- void * id - Collision detected callback ID obtained when adding it.
Return value
True if the collision detected callback with the given ID was removed successfully; otherwise false.void clearOnCollisionDetectedCallbacks ( ) #
Clears all added collision detected callbacks.Last update:
2022-12-14
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