3D photo orthographic view zoom control - camera put in place?

I try to display two controls 3D image.  A poster of the 3D objects (Auto Projection: Perspective, Camera Controller: spherical).  This 3D image works fine and I have no problem with him.  Other Contol photo is intended to simulate a 2D to 3D, essentially a Plan view object image.  To do this, I made an image with an orthogonal view 3D control.  I put the camera to see through top (z axis) and set a goal to be the positive y-axis.

I've attached an example vi (labview 2013 SP1) that creates simple 3D objects and displays them using the same camera Position in Perspective and orthographic.  Initial start-up, the orthographic image is zoomed in strongly. If I Zoom in manually (button press and hold Shift and mouse upwards or downwards), then the orthographic image will set itself in the right position of the camera.  This is essentially the solution to my problem, but I can't assume that the user will have the ability to zoom in manually the image.  So I need to set it programmatically.

If you manual adjust the display on a screen (rotation and zoom), then click on the button Set camera, two images will give a plan view, but only the Image point of view will be the right zoom camera or the distance.  The spelling remains to the last zoom distance.

Is it possible to set the distance of the camera for orthographic projection by programming?   I have tried running with the perspective 3D picture control, set the distance of the camera and then change to spelling, but this still translates into a spell zoomed image.  Reading, I did it, I think I'm trying the impossible.  Does anyone have another suggestion to get the same result.  I've used 2D image functions to generate the image, but found that this inefficient method.

And suggestions would be great.

Thank you

RELEC

Hi Relec,

Thanks (and congratulations) for this inspiring demo!

Took me all to work out, but I might have found something that might help us with the orthographic projection.

Sometimes, back someone posted a way to collect the current data of the camera. Sorry I lost the source. But here's my version as a Get3DCameraPosition.vi using the ModelViewMatrix.

Unfortunately this does not return the current target and so a bit of guessing in the right Direction is necessary.

I am impressed that you found a way to make the shift Zoom-possible movement on the spelling window.

It seems that a whole thread to http://forums.ni.com/t5/LabVIEW/3D-Picture-Control-Doesn-t-Zoom-in-Orthographic-Mode/td-p/1544460/p... was not able to know which.

In the meantime, I found a way using the ProjectionMatrix to create a magnifying glass effect which build in your demo using the mouse wheel.

Overall, I tried to translate the camera movements from the window from the perspective of the ortho - assuming it is what you were after?

Yet once the missing information from the target do not quite right.

Regs

Jannis

Tags: NI Software

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