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  #1  
Old 05-13-2009, 10:43 AM
lilio lilio is offline
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Join Date: May 2009
Posts: 11
viz.vertex coordinates

Hello,

I want to create a vertex at the mouseclick position, but I don't know how to do it.

If I create two vertex points:
Code:
viz.startlayer(viz.POINTS)
viz.pointsize(10)
viz.vertexcolor(viz.RED)
viz.vertex(0,0,10)
viz.vertex(1,1,10)
line = viz.endlayer()
And afterthat I click with my mouse at these points and look at my output window:
Code:
print viz.mouse.getPosition()
Then I had to recognize, that there are absolutly different values.

The vertex are at [0,0,10] and [1,1,10] and my mouseposition shows [0.6,0.3] and [0.5,0.2]!

Are the vertex coordinates world coordinates? Or what means 0,0,10? And what are the mouseposition coordinates?

What's the reason for this difference. I want to create vertex at the mouseclick position.

Can anybody help me - please.
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  #2  
Old 05-14-2009, 03:31 AM
lilio lilio is offline
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Join Date: May 2009
Posts: 11
If I create the vertex with this command:

Code:
point = viz.endlayer(viz.WORLD)
then the vertex will be placed at another position like the mouse is.

But if I use

Code:
point = viz.endlayer(viz.SCREEN)
then the vertex will be placed at the mouseclick position.

But I don't want to place the vertex at the screen. It should be placed in the world at the mouseposition and at 0 on the z-axis.

I hope somebody understand my problem.

I only want to create a vertex in the world (not at the screen), but exactly at the mouseposition.

Is this possible?
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  #3  
Old 05-14-2009, 10:56 AM
Gladsomebeast Gladsomebeast is offline
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Location: Isla Vizta, CA
Posts: 397
Use the "screentoworld" method to get a direction vector. Then use vizmat.MoveAlongVector to find a place in space.
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  #4  
Old 05-15-2009, 04:25 AM
Chrissy2009 Chrissy2009 is offline
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Join Date: May 2009
Posts: 33
Hey Gladsomebeast,

I've got the same problem. I want to create points in the world, not on the screen.

But I don't understand your answer. Could you write down the code, please?

THANKS!
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  #5  
Old 05-15-2009, 11:58 AM
Gladsomebeast Gladsomebeast is offline
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Location: Isla Vizta, CA
Posts: 397
Looks like we don't need MoveAlongVector. Got this code from viztracker.py:

Code:
line = viz.screentoworld(viz.Mouse.getPosition())
line.length = desiredMetersFromView
print line.end
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  #6  
Old 05-16-2009, 09:09 AM
Chrissy2009 Chrissy2009 is offline
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Oh great, thanks a lot!!
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  #7  
Old 05-16-2009, 04:36 PM
Gladsomebeast Gladsomebeast is offline
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Location: Isla Vizta, CA
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Helping make me happy.
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