uniform sampler2D uTexMain;
uniform sampler2D uTexDudv;
-uniform sampler2D uTexDepth;
+uniform sampler2D uTexBack;
+
uniform vec2 uInvRes;
uniform float uTime;
+uniform vec3 uCamera;
+uniform float uSurfaceY;
+
+uniform vec3 uShoreColour;
+uniform vec3 uOceanColour;
-in vec4 aUv;
+in vec4 aColour;
+in vec2 aUv;
+in vec3 aNorm;
in vec3 aCo;
+in vec3 aWorldCo;
+
+#include "common_world.glsl"
+
+vec4 water_surf( vec3 halfview, vec3 vnorm, float depthvalue,
+ vec4 beneath, vec4 above )
+{
+ vec3 surface_tint = mix(uShoreColour, uOceanColour, depthvalue);
+
+ float ffresnel = pow(1.0-dot( vnorm, halfview ),5.0);
+
+ vec3 lightdir = vec3(0.95,0.0,-0.3);
+ vec3 specdir = reflect( -lightdir, vnorm );
+ float spec = pow(max(dot(halfview,specdir),0.0),20.0)*0.3;
+
+ // Depth
+ float depthblend = pow( beneath.a,0.8 );
+
+ // Composite
+ vec3 vsurface = mix(surface_tint, above.rgb, ffresnel );
+ //vsurface += spec;
+
+ return vec4( vsurface,depthblend );
+}
void main()
{
+ // Create texture coords
vec2 ssuv = gl_FragCoord.xy*uInvRes;
- vec4 dudva = texture( uTexDudv, aUv.xy + vec2(uTime*0.04f,uTime*0.03f) );
- vec4 dudvb = texture( uTexDudv, aUv.xy - vec2(uTime*0.1,uTime*0.054) );
+
+ // Surface colour composite
+ float depthvalue = clamp( -world_depth_sample( aCo )*(1.0/25.0), 0.0, 1.0 );
- vec2 distortamt = (dudva.rg-0.5) * (dudvb.ba-0.5) * 2.0;
+ vec2 world_coord = aCo.xz * 0.008;
+ vec4 time_offsets = vec4( uTime ) * vec4( 0.008, 0.006, 0.003, 0.03 );
+ vec4 dudva = texture( uTexDudv, world_coord + time_offsets.xy )-0.5;
+ vec4 dudvb = texture( uTexDudv, world_coord *7.0 - time_offsets.zw )-0.5;
- vec4 reflected = texture( uTexMain, ssuv+distortamt );
- float depthvalue = texture( uTexDepth, aUv.zw ).r;
- float opacity = smoothstep( 0.0, 0.1, depthvalue );
+ vec3 surfnorm = dudva.rgb + dudvb.rgb;
+ surfnorm = normalize(vec3(0.0,1.0,0.0) + dudva.xyz*0.4 + dudvb.xyz*0.1);
+
+ // Foam
+ float fband = fract( aCo.z*0.02+uTime*0.1+depthvalue*10.0 );
+ fband = step( fband+dudva.a*0.8, 0.3 ) * max((1.0-depthvalue*4.0),0.0);
- vec3 colour_shore = vec3( 0.96, 0.98, 0.9 );
- vec3 colour_ocean = vec3( 0.61, 0.84, 0.9 );
- vec3 surface_tint = mix( colour_shore, colour_ocean, depthvalue );
+ // Lighting
+ vec3 halfview = -normalize( aCo-uCamera );
- vec3 comp_surf = mix(pow(surface_tint,vec3(6.0))*0.6,reflected.rgb, 0.7);
-
- float band = fract( aCo.z*0.1+uTime*0.1-depthvalue*10.0 );
- band = step( band + dudvb.g*0.8, 0.5 ) * max((1.0-depthvalue*4.0),0.0);
+ // Sample textures
+ vec4 above = texture( uTexMain, ssuv+ surfnorm.xz*0.2 );
+ vec4 beneath = texture( uTexBack, ssuv );
+
+ // Fog
+ float fdist = pow(length( aCo.xz-uCamera.xz ) * 0.00047, 2.6);
- FragColor = vec4(comp_surf + band*0.2,opacity+band*0.2);
+ // Composite
+ vec4 vsurface = water_surf( halfview, surfnorm, depthvalue, beneath, above );
+ vsurface.a -= fdist;
+ FragColor = mix( vsurface, vec4(1.0,1.0,1.0,0.5), fband );
}