81 lines
2.2 KiB
GLSL
81 lines
2.2 KiB
GLSL
uniform sampler2D water_normalmap;
|
|
uniform sampler2D water_reflection;
|
|
uniform sampler2D water_dudvmap;
|
|
uniform float saturation;
|
|
|
|
varying vec4 waterTex1; //moving texcoords
|
|
varying vec4 waterTex2; //moving texcoords
|
|
varying vec4 waterTex4; //viewts
|
|
varying vec4 ecPosition;
|
|
varying vec3 viewerdir;
|
|
varying vec3 lightdir;
|
|
varying vec3 normal;
|
|
|
|
void main(void)
|
|
{
|
|
const vec4 sca = vec4(0.005, 0.005, 0.005, 0.005);
|
|
const vec4 sca2 = vec4(0.02, 0.02, 0.02, 0.02);
|
|
const vec4 tscale = vec4(0.25, 0.25, 0.25, 0.25);
|
|
|
|
// compute direction to viewer
|
|
vec3 E = normalize(viewerdir);
|
|
|
|
// compute direction to light source
|
|
vec3 L = normalize(lightdir);
|
|
|
|
// half vector
|
|
vec3 H = normalize(L + E);
|
|
|
|
const float water_shininess = 240.0;
|
|
|
|
vec4 viewt = normalize(waterTex4);
|
|
|
|
vec4 disdis = texture2D(water_dudvmap, vec2(waterTex2 * tscale)) * 2.0 - 1.0;
|
|
vec4 dist = texture2D(water_dudvmap, vec2(waterTex1 + disdis*sca2)) * 2.0 - 1.0;
|
|
//vec4 fdist = dist;
|
|
vec4 fdist = normalize(dist);
|
|
fdist *= sca;
|
|
|
|
//normalmap
|
|
vec4 nmap0 = texture2D(water_normalmap, vec2(waterTex1+ disdis*sca2)) * 2.0 - 1.0;
|
|
vec4 nmap2 = texture2D(water_normalmap, vec2(waterTex2 * tscale)) * 2.0 - 1.0;
|
|
vec4 vNorm = normalize(nmap0 + nmap2);
|
|
|
|
//load reflection
|
|
vec4 tmp = vec4(lightdir, 0.0);
|
|
vec4 refTex = texture2D(water_reflection, vec2(tmp));
|
|
vec4 refl = normalize(refTex);
|
|
|
|
vec3 N0 = vec3(texture2D(water_normalmap, vec2(waterTex1+ disdis*sca2)) * 2.0 - 1.0);
|
|
vec3 N1 = vec3(texture2D(water_normalmap, vec2(waterTex2 * tscale)) * 2.0 - 1.0);
|
|
vec3 N = normalize(normal+N0+N1);
|
|
|
|
vec3 specular_color = vec3(gl_LightSource[0].diffuse)
|
|
* pow(max(0.0, dot(N, H)), water_shininess) * 6.0;
|
|
|
|
vec4 specular = vec4(specular_color,0.5);
|
|
|
|
//calculate fresnel
|
|
vec4 invfres = vec4( dot(vNorm, viewt) );
|
|
vec4 fres = vec4(1.0) + invfres;
|
|
refl *= fres;
|
|
|
|
|
|
specular = specular * saturation;
|
|
|
|
vec4 finalColor = refl + specular;
|
|
|
|
float fogFactor;
|
|
float fogCoord = ecPosition.z;
|
|
const float LOG2 = 1.442695;
|
|
fogFactor = exp2(-gl_Fog.density * gl_Fog.density * fogCoord * fogCoord * LOG2);
|
|
|
|
vec4 ambient_light = gl_LightSource[0].diffuse;
|
|
|
|
finalColor *= ambient_light;
|
|
|
|
if(gl_Fog.density == 1.0)
|
|
fogFactor=1.0;
|
|
|
|
gl_FragColor = mix(gl_Fog.color,finalColor, fogFactor);
|
|
}
|