WorldViz User Forum - Cooperation of things within the Virtual world

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- - Cooperation of things within the Virtual world (https://forum.worldviz.com/showthread.php?t=5938)

Cooperation of things within the Virtual world

Hello,

So i wrote a Program where i implemented a STL-Data (Basicly a Matlab created cuboid that should simulate a heating system).
Recently i started to use physics in my Program.

Code:

viz.setMultiSample(4)

vizconnect.go('vizconnect_hand_vive.py') 

viz.phys.enable() 

viz.collision(viz.ON)



ground = viz.addChild('ground_gray.osgb')

ground.collideplane()

Heizung = viz.addChild('heiz2.osgb')

Heizung.collideBox()

I set the ground as bottom and enabled the Heizung for physics via the CollideBox command.
The problem that i have now is that the cuboid (who is higher than he is wide) just drops over to the front. What i want it to do tho is to fix that cuboid at the bottom so it basicly simulates an imobile machine. So the question is can i attach that Child to the ground level and make it kinda "heavy" as if a massive metal block would stand there.

And on top of that i wanted to figure out a way to attach smaller boxes to it. Basicly if i take a generated box and put it at a certain point of the Big block it gets attached to that point.

Code:

box1 = vizshape.addCube(size=0.2, pos=[0,1.45,5.4],alpha=1)

box1.collideBox()

So if i take that Box and put it at a certain point (that i defined before) somewhere on the side of my "Heizung" it gets attached to that automatically and stays at that point? But if i grab it again i want to be able to remove it again aswell.

Thanks in Advance

Reducing the bounce of the box may help prevent it from falling over after it's dropped. Here's an example:

Code:

'''

Press spacebar to enable physics and drop the box

'''



import viz

import vizact

import vizshape

import vizinfo



viz.go()

vizinfo.InfoPanel()



viz.clearcolor(viz.SLATE)

ground = viz.add('ground.osgb')

ground.collidePlane()



box = vizshape.addBox(size=(.4,2,0.4),pos=[0,20,8])

shape = box.collideBox()

shape.setBounce(0.01)



vizact.onkeydown(' ',viz.phys.enable)

If you want objects to snap into place after colliding try handling the collision event and then animate or directly place the object where you want it to go.

The problem is not that the boxes drop but the osgb i imported

The Heizung Attribute is a STL data i implemented and edited it with the inspector. The boxes i implemented work perfectly fine they drop and lay staticly on the ground after they fell but the heiz1.osgb (a picture of it is attached) just drops over and i dont know why it does that in first place when i enable the phisycs

Hey,

just a quick question to the topic above again.
I think i found the problem. Like the Screenshot shows, the center of gravity is at the down left front corner of the object. so i think the physics apply at that point and thats why the object drops so weird on the ground.
I found sth about the pivot point in the documentary which defines the the turn axe of the object. Does that point also determines where the physics apply?
So i just had to move the point in the screenshot to the center of the object and i guess the problem would be solved. I found the solution in the documentary but all these functions are not shown in my instructor, so my question is how do i move that center of gravity?
Sorry to bother you so much but thanks for the help in advance

Forgot to attach the Screenshot
here we go

The node.setCenter command will change the object's center of rotation. I'm not sure but it might also help in this case.