relative pos

liuzhengcai · January 27, 2016, 5:27am

how can i get a point’s position relative to cam len

something like

base.cam.getRelativePoint(point, (0,0,0))

rdb · January 27, 2016, 11:44am

That looks about right, is it not working?

liuzhengcai · January 27, 2016, 3:25pm

base.cam.getRelativePoint(nodepath, (0,0,0)),it need nodepath,not point. I must create a node in the positon for it . is there a direct way ?

Epihaius · January 27, 2016, 10:38pm

This NodePath represents the coordinate system in which the position of the point is defined. The second argument is the point itself.

If that node is attached to base.render (the “world”), then the point’s position is in world space; to get its position in camera space, do something like this:

pos_rel_to_world = Point3(7., 12., -3.)
pos_rel_to_cam = base.cam.get_relative_point(base.render, pos_rel_to_world)

Hope this helps .

liuzhengcai · January 28, 2016, 1:58am

Epihaius:

liuzhengcai:

base.cam.getRelativePoint(nodepath, (0,0,0)),it need nodepath,not point.

This NodePath represents the coordinate system in which the position of the point is defined. The second argument is the point itself.

liuzhengcai:

I must create a node in the positon for it .

If that node is attached to base.render (the “world”), then the point’s position is in world space; to get its position in camera space, do something like this:
pos_rel_to_world = Point3(7., 12., -3.)
pos_rel_to_cam = base.cam.get_relative_point(base.render, pos_rel_to_world)
Hope this helps .

thanks!