Is it possible to hide some part of a GLHeightField
lazarus / 70-OpenGL

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stab · 2014-12-05 23:55

Hi,

Am using GLHeightField to display a 3D-landscape with a rectangular
border limit. Data is only valid within a polygon inside that
rectangle and all data values not inside the polygon are set to a
defined NoData value.

Is it possible to hide these NoData areas or make them transparent?

Regards
stab

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Ocye · 2014-12-09 12:22

Is glViewport() what you are looking for?

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stab · 2014-12-09 12:57

Thanks for the advice.

Might be what I'm looking for

/stab

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circular · 2014-12-10 15:37

You might set all the invalid values to zero, so that it would be
clear what to take into account?