mav_windowViewModifierSet - Set the window view modification function and parameters.

[ Maverik Level 1 functions ]

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mav_windowViewModifierSet

## Summary

Set the window view modification function and parameters.

## Syntax

void mav_windowViewModifierSet(MAV_window *w, MAV_viewModifierParams *vmp, MAV_viewModifierFn fn);

- MAV_window *w
  Window.

- MAV_viewModifierParams *vmp
  The view modification parameters to use.

- MAV_viewModifierFn fn
  The view modification function to use.

## Description

This function sets the view modification function for window `w` to be `fn` and to use an associated set of parameters `vmp`. The function arbitrarily modifiers the view in a window by an amount defined by the associated parameters.

This function is typically used to perform stereo viewing as follows. Two windows will share a common set of view modification parameters, but one window will have a view modification function which translates the view to the right by an amount given in the view modification parameters, while the other window will have a different view modification function which translates the view to the left by the same amount.

Maverik supplies three view modification functions: mav_eyeMono, mav_eyeLeft and mav_eyeRight. mav_eyeMono does not modify the view, and is the default for a window, while mav_eyeLeft and mav_eyeRight respectively offset the eye point to the left and right along the view right vector by half the value of the `offset` set in the `MAV_viewModifierParams`. An advanced user could write their own `MAV_viewModifierFn`'s so as to apply, for example, a convergence in the view direction vectors as well as an eye point offset.

       MAV_viewModiferParams vmp;

       vmp.offset= 20.0;

       mav_windowViewModifierSet(mav_win_left, &vmp, mav_eyeLeft);
       mav_windowViewModifierSet(mav_win_right, &vmp, mav_eyeRight);

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