wie man die Maus abfragt (4) drag and drop.py

Dateiinhalt

from visual import *

scene.range = 5

kugel = sphere(pos=(-3,0,0), color=color.cyan)
wuerfel = box(pos=(+3,0,0), size=(2,2,2), color=color.red)
pick = None #das angeklickte Objekt - am Anfang keines

while True:
    rate(30)
    if scene.mouse.events:
        m1 = scene.mouse.getevent() # get event
        if m1.drag and m1.pick == kugel: # if touched
            drag_pos = m1.pickpos # where on the ball
            pick = m1.pick # pick now true (not None)
        elif m1.drop: # released at end of drag
            pick = None # end dragging (None is false)
    if pick:
        # project onto xy plane, even if scene rotated:
        new_pos = scene.mouse.project(normal=(0,0,1))
        if new_pos != drag_pos: # if mouse has moved
            # offset for where the ball was touched:
            pick.pos += new_pos - drag_pos
            drag_pos = new_pos # update drag position