GLSL: How Do I cast a float into an int?

Question

In a GLSL fragment shader I am trying to cast a float into an int. The compiler has other ideas. It complains thusly:

ERROR: 0:60: '=' :  cannot convert from 'mediump float' to 'highp int'

I am trying to do this:

mediump float indexf = floor(2.0 * mixer);
highp int index = indexf;

I (vainly) tried to raise the precision of the int above the float to appease the GL Gods but no joy.

Could someone please school me here?

Thanks,
Doug

Answer 1

Try this:

highp int index = int(indexf);

I found it here.