water and underwater shader sundir and amplitude to uniforms

[shadmar]

For the sake of controlling light on water during a day/night cycle and amplitude.

 

Water.shader, change :

vec3 sundir = vec3(0.707,-0.707,0.707);

to

uniform vec3 sundir = vec3(0.707,-0.707,0.707);

 

Underwater.shader, change:

float amplitude = 0.25;
vec3 sundir = vec3(0.707,-0.707,0.707);

to

uniform float amplitude = 0.25;
uniform vec3 sundir = vec3(0.707,-0.707,0.707);