NodeTrigger Class

A trigger node is a zero-sized node that has no visual representation and fires callbacks when:

• It is enabled/disabled (the enabled callback function is called)
• Its transformation is changed (the position callback function is called)

For example, to detect if some node has been enabled (for example, a world clutter node that renders nodes only around the camera has enabled it), the trigger node is added as a child to this node and fires a corresponding callback.

NodeTrigger Class

Members

NodeTrigger ()

string getEnabledCallbackName ()

Return value

string getPositionCallbackName ()

Return value

void setEnabledCallbackName (string name)

Arguments

• string name - Name of the callback function.

Examples

NodeTrigger trigger;

// Implement a callback function
int enabled_callback_func() {
	// Your callback code
	return 1;
}

// Set the callback to fire when NodeTrigger is enabled
trigger.setEnabledCallbackName("enabled_callback_func");

void setEnabledCallback (variable function, variable arg0 = 0, variable arg1 = 0)

Arguments

• variable function - Name of the callback function.
• variable arg0 - Argument to the function. This is an optional parameter.
• variable arg1 - Argument to the function. This is an optional parameter.

Examples

NodeTrigger trigger;
MyClass arg0; // it can be an argument of any type

// Implement a callback function
// It can also take any other 2 arguments, if necessary
int enabled_callback_func(NodeTrigger trigger, MyClass arg0) {
	// Your callback code
	return 1;
}

// Set the callback to fire when NodeTrigger is enabled
trigger.setEnabledCallback("enabled_callback_func", arg0);

void setPositionCallbackName (string name)

Arguments

• string name - Name of the callback function.

Examples

NodeTrigger trigger;

// Implement a callback function
int repositioned_callback_func() {
	// Your callback code
	return 1;
}

// Set the callback to fire when NodeTrigger has changed its position
trigger.setPositionCallbackName("repositioned_callback_func");

void setPositionCallback (variable function, variable arg0 = 0, variable arg1 = 0)

Arguments

• variable function - Name of the callback function.
• variable arg0 - Argument to the function. This is an optional parameter.
• variable arg1 - Argument to the function. This is an optional parameter.

Examples

NodeTrigger trigger;
MyClass arg0; // it can be an argument of any type

// Implement a callback function
// It can also take any other 2 arguments, if necessary
int repositioned_callback_func(NodeTrigger trigger, MyClass arg0) {
	// Your callback code
	return 1;
}

// Set the callback to fire when NodeTrigger has changed its position
trigger.setPositionCallback("repositioned_callback_func", arg0);