How to animate object?

[dimonbavly]

When I try animate this - CQ-editor(or CQ) give too many objects. Although I assumed there would be an animation of box. import cadquery as cq t =3 while t<=10: result = cq.Workplane("XY" ).box(t, t, t).edges("|Z").fillet((t**(1/2))/2) show_object(result) t = t + 0.1 How can i implement this? Is it possible to animate the kinematic slice operation? I want to write programs for CNC for multi-axis processing.

[jmwright]

@dimonbavly Every call of show_object causes the CadQuery Gateway Interface (CQGI) to add a copy of the object to a list of objects to be rendered. The assumption was that separate objects would be included by the user, not the same object multiple times in different orientations.

@adam-urbanczyk It's an interesting idea to have a simple animation mode that would display all the objects handed back by CQGI in order, with a preset delay between each keyframe.

@fragmuffin Have you done any work with animation in cqparts?

[adam-urbanczyk]

@dimonbavly as you noticed every call to show_object results in a new object in the object tree. There is currently no functionality to support what you need. You could implement animation by manipulating the AIS_ColoredShape objects that are used by the OCC kernel for displaying. For experiments you can use the embedded python console:

from OCC.gp import *

T = gp_Trsf()
T.SetRotation(gp_Ax1(gp_Pnt(0., 0., 0.), gp_Dir(0., 0., 1.)), 90)

obj_tree = self.components['object_tree']
viewer =  self.components['viewer']
obj = obj_tree.CQ.child(0)
obj.ais.SetLocalTransformation(T)
viewer.redraw()

I think it is a nice idea to enable animation in CQ-editor and I think it would fit best in a separate component (PRs are very welcome!). I could add some signals and slots to the object_tree component to facilitate this.

[prst]

Now I too very interested to implement animation in FreeCAD by using CQ. Yesterday try first time and.... was found problems if try to "import serial" (described here https://groups.google.com/forum/#!topic/cadquery/ijDfBsfr6SI ) So if do:

import serial got message Traceback (most recent call last): File "", line 1, in ModuleNotFoundError: No module named 'serial' and in 'report view' message Contents of /home/stan/FreeCAD/CadQuery/new_test_cadquery.py changed, reloading Executing CQGI-compliant script. Error executing CQGI-compliant script. No module named 'serial' Executed /home/stan/FreeCAD/CadQuery/new_test_cadquery.py

but is OK for

import os import sys import time

Another point: If edit source_code.py file in external editor and save - immediately changes is applied, it look like an animation. As new idea it is using open pipe-files instead of serial, and use "import os, sys, time"

I want to do something like https://www.youtube.com/watch?v=XHaB0mGrPZ8

[jmwright]

@prst What version of FreeCAD and the CadQuery FreeCAD module are you using? I can import the serial module fine on my system.

Also, unless you have a compelling reason to stay with FreeCAD, you might want to think about switching to CQ-editor (the project within this repo) and CadQuery 2.0, which aren't FreeCAD based anymore. Almost all effort will be put into them going forward.

[prst]

Issue with serial was solves. Tho main points:

1. Not work if use FreeCAD as : ./FreeCAD_0.18-16117-Linux-Conda_Py3Qt5_glibc2.12-x86_64.AppImage ->>> not worked by reason of using Python in sandbox in /tmp/ without support of serial If use freecad (as /usr/bin/freecad) from APT-repositories - all OK, because used system Python
2. Need to do - pip3 uninstall serial

About idea with open files or pipe - Tested this: Open file and get data from file

import time
import sys
import os
import glob
import struct
import math
import serial
import serial.tools.list_ports
#from serial import *
from tkinter import Tk, Canvas, Frame, BOTH, Button
from tkinter import *
import tkinter.ttk as ttk
import cadquery as cq
from Helpers import show

        length      = 60.0       # Length of the block
        height      = 40.0       # Height of the block
        thickness   = 10.0    # Thickness of the block
        filepath = '~/FreeCAD/test.txt'
        cnt = 0
        #while True:            ### => DIRTY, just for try
            with open(filepath) as fp:
                line = fp.readline()
                while line:
                    dat=line.strip()
                    #print( "Line {}: {}".format( cnt, line.strip() ) )
                    print( "Line {}: {}".format( cnt, dat ) )
                    line = fp.readline()
                    cnt += 1
                    #r = cq.Workplane("XY").box( length, height, thickness)
                    r = cq.Workplane("XY").box( int(dat), height, thickness)
                    show_object(r)

But here main loop not work #while True: - if uncommented, than freecad frozen method with this code is work, because in console see: (need to run freecad from console) Executing CQGI-compliant script. Line 0: 25 Line 1: 25 Line 2: 25 Line 3: 25 Line 4: 25 Line 5: 25 Line 6: 25 more times ....

It is look like need to implement more correct refresh method