46 lines
1.2 KiB
Text
46 lines
1.2 KiB
Text
|
!!cvarf r_waterwarp
|
||
|
|
|
||
|
|
//this is a post processing shader that is drawn fullscreen whenever the view is underwater.
|
||
|
|
//its generally expected to warp the view a little.
|
||
|
|
|
||
|
|
#ifdef VERTEX_SHADER
|
||
|
|
attribute vec2 v_texcoord;
|
||
|
|
varying vec2 v_stc;
|
||
|
|
varying vec2 v_warp;
|
||
|
|
varying vec2 v_edge;
|
||
|
|
uniform float e_time;
|
||
|
|
void main ()
|
||
|
|
{
|
||
|
|
gl_Position = ftetransform();
|
||
|
|
v_stc = (1.0+(gl_Position.xy / gl_Position.w))/2.0;
|
||
|
|
v_warp.s = e_time * 0.25 + v_texcoord.s;
|
||
|
|
v_warp.t = e_time * 0.25 + v_texcoord.t;
|
||
|
|
v_edge = v_texcoord.xy;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#ifdef FRAGMENT_SHADER
|
||
|
|
varying vec2 v_stc;
|
||
|
|
varying vec2 v_warp;
|
||
|
|
varying vec2 v_edge;
|
||
|
|
uniform sampler2D s_t0;/*$currentrender*/
|
||
|
|
uniform sampler2D s_t1;/*warp image*/
|
||
|
|
uniform sampler2D s_t2;/*edge image*/
|
||
|
|
uniform vec3 e_rendertexturescale;
|
||
|
|
uniform float cvar_r_waterwarp;
|
||
|
|
void main ()
|
||
|
|
{
|
||
|
|
float amptemp;
|
||
|
|
vec3 edge;
|
||
|
|
edge = texture2D( s_t2, v_edge ).rgb;
|
||
|
|
amptemp = (0.010 / 0.625) * cvar_r_waterwarp * edge.x;
|
||
|
|
vec3 offset;
|
||
|
|
offset = texture2D( s_t1, v_warp ).rgb;
|
||
|
|
offset.x = (offset.x - 0.5) * 2.0;
|
||
|
|
offset.y = (offset.y - 0.5) * 2.0;
|
||
|
|
vec2 temp;
|
||
|
|
temp.x = v_stc.x + offset.x * amptemp;
|
||
|
|
temp.y = v_stc.y + offset.y * amptemp;
|
||
|
|
gl_FragColor = texture2D( s_t0, temp*e_rendertexturescale.st );
|
||
|
|
}
|
||
|
|
#endif
|