WorldViz User Forum - Turn around the y-axis

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- - Turn around the y-axis (https://forum.worldviz.com/showthread.php?t=2164)

Turn around the y-axis

Hello,

how can I turn my drawn layer around the y-axis?

Code:

viz.startlayer(viz.LINES)

viz.linewidth(3)

viz.vertexcolor(viz.RED)

viz.vertex(2,3,5)

viz.vertex(-1,2,9)

viz.startlayer(viz.POINTS)

viz.pointsize(10)

viz.vertex(2,3,5)

viz.vertex(-1,2,9)

vec1 = viz.endlayer()

And now I want to turn this line around the y-axis for an special amount.

I've tested this:

Code:

def keyboardAction(key):

        if viz.key.isDown('1'):

                vec1.addAction(vizact.spin(0,1,0, 10))



viz.callback(viz.KEYDOWN_EVENT,keyboardAction)

But that's not what I want.

I want to turn the line around the y-axis, but one point should be fixed. So only the second point of the line should turn around.

That it looks like one point is fixed and the other point of the line turns around the fixed point.

For example: I draw this line and if I push the key '1' then the second point turns about 10 degree around the y-axis.

Is this possible?

I've solved my problem with this:

Code:

vec1.rotate(1,0,0,'',viz.RELATIVE_LOCAL)

This works fine, but I want to set the rotation point of my object at the first vertex.

So the first vertex should be fixed and the second one should rotate around this first one.

Currently my object rotates both vertex and the rotation point seems to be in the middle of the line.

You can use the .center() command to set the pivot point for rotation. For example, if you wanted to rotate the line around the first vertex, you would use the following code:

Code:

vec1.center(2,3,5)