WorldViz User Forum - Is that possible to create some connection between to sphere?

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- - Is that possible to create some connection between to sphere? (https://forum.worldviz.com/showthread.php?t=5803)

haohaoxuexi1

07-29-2016 02:27 PM

Is that possible to create some connection between to sphere?

For example, I add two spheres into Vizard to represent the joints.

However, I want to create a line or some other things which can connect these two joints.

When the position of the joints change, the line will move follow the joints.

Thanks.

Jeff	07-30-2016 06:29 AM

You could create an on-the-fly line to connect the two spheres.

haohaoxuexi1

07-31-2016 12:16 PM

Quote:

Originally Posted by Jeff (Post 18599)

You could create an on-the-fly line to connect the two spheres.

Code:

import viz,vizact,vizshape, vizmat



viz.go()

grid = vizshape.addGrid() 



sphere_0_left = vizshape.addSphere(radius=0.1)

sphere_1_left = vizshape.addSphere(radius=0.1)

So how to connect this two sphere using on the fly

Jeff	07-31-2016 08:00 PM

If you want to draw a line, create a layer with viz.lines and use the center point of each sphere as a vertex. You can update the vertex positions as the sphere positions change.

haohaoxuexi1

08-01-2016 10:56 AM

Quote:

Originally Posted by Jeff (Post 18602)

If you want to draw a line, create a layer with viz.lines and use the center point of each sphere as a vertex. You can update the vertex positions as the sphere positions change.

in that way, the system will repeat drawing the line as many as the times of position changes.

is there a way to draw one line and keep updating the position

Jeff	08-02-2016 07:03 AM

Yes, once you create the line you can move it like any other object:

Code:

import viz

import vizshape



viz.go()



viz.clearcolor(viz.SLATE)

vizshape.addGrid()



viz.startLayer(viz.LINES) 

viz.vertex(0,0,0)  

viz.vertex(0,1,0) 

line = viz.endLayer() 



line.setPosition([2,0,7])

line.color(viz.RED)

haohaoxuexi1

08-02-2016 10:11 AM

Quote:

Originally Posted by Jeff (Post 18619)

Yes, once you create the line you can move it like any other object:

Code:

import viz

import vizshape



viz.go()



viz.clearcolor(viz.SLATE)

vizshape.addGrid()



viz.startLayer(viz.LINES) 

viz.vertex(0,0,0)  

viz.vertex(0,1,0) 

line = viz.endLayer() 



line.setPosition([2,0,7])

line.color(viz.RED)

Is there a way to change the position of line only by change the vertex of it?

In the code you gave to me, the length of the line is fixed, is that possible to get a line which will change its length according to the position of vertex?

haohaoxuexi1

08-08-2016 02:43 PM

Quote:

Originally Posted by Jeff (Post 18619)

Yes, once you create the line you can move it like any other object:

Code:

import viz

import vizshape



viz.go()



viz.clearcolor(viz.SLATE)

vizshape.addGrid()



viz.startLayer(viz.LINES) 

viz.vertex(0,0,0)  

viz.vertex(0,1,0) 

line = viz.endLayer() 



line.setPosition([2,0,7])

line.color(viz.RED)

can you help me to solve my last question?

Jeff	08-08-2016 10:59 PM

Yes, you can modify vertices to change the length of the line. Take a look at the changing vertices page from the on-the-fly section. Does this help answer your question?

haohaoxuexi1

08-09-2016 02:48 PM

Quote:

Originally Posted by Jeff (Post 18648)

Yes, you can modify vertices to change the length of the line. Take a look at the changing vertices page from the on-the-fly section. Does this help answer your question?

fixed it, thanks

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