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DefaultPickCtrl
Synopsis
define the Graphics Display Kit pick control information
group+OPort GDpick_ctrl_templ {
int+IPort2+read x;
int+IPort2 y;
int+IPort2 event;
int mode; /* pick first, all, or append */
int on_start; /* if 1, pick only on start event */
};GDpick_ctrl_templ GDpick_ctrl;
GDpick_ctrl DefaultPickCtrl {
x = 0;
y = 0;
};Description
These templates define the Graphics Display Kit's pick control information. GDpick_ctrl_templ defines the elements that cause pick control's methods to execute. GDpick_ctrl defines an instanceable version without default values. DefaultPickCtrl defines an instanceable version with default values.The pick control information is connected to a Graphics Display Kit view. The view adds a callback (that is, the view pick routine) that is invoked when the pick control information changes, typically, when the XY position at which to pick is changed.
Input
The screen space position at the time of the event. The XY positions typically come from either a UIonePoint or a UItwoPoint interactor.
Whether a pick event has occurred: 0 means no; non-zero means yes. The event typically comes from a UIonePoint or a UItwoPoint interactor.
Parameters
This parameter controls the picking mode. The only supported mode is to pick the front-most primitive.
This parameter controls when picking is done if the pick control information is attached to a UItwoPoint. A UItwoPoint generates XY positions on the start gesture, the run gesture, and the end gesture. A value of 0 in the on_start parameter means to pick all gestures. A value of 1 means to generate a pick only on the start gesture.This control can be used to allow the EditMesh module to perform its processing with one sequence. That is, the start gesture performs the pick and the highlight, the run gesture(s) perform the edit, and the end gesture confirms the edit.
Example
Libraries.Graphics_Display.Views.View3D
File
See also related modules
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