>Psychtoolbox>PsychOneliners

kPsychDontDoRotation

Returns a constant to be passed as part of the ‘specialFlags’ parameter
of the Screen(‘DrawTexture’) and Screen(‘DrawTextures’) command.

If this flag is set, the texture drawing functions will not apply texture
Rotation by themselves, even if the ‘rotationAngle’ parameter is
non-zero. Instead they will just pass the ‘rotationAngle’ parameter to a
GLSL shader if any is enabled, so the shader can implement its own way of
“rotating” the texture to be drawn. This allows for custom
implementations of texture drawing.