fragmentShader = /* glsl */ ` uniform sampler2D mirrorSampler; uniform float alpha; uniform float time; uniform float size; uniform float distortionScale; uniform sampler2D normalSampler; uniform vec3 sunColor; uniform vec3 sunDirection; uniform vec3 eye; uniform vec3 waterColor; varying vec4 mirrorCoord; varying vec4 worldPosition; vec4 getNoise( vec2 uv ) { vec2 uv0 = ( uv / 103.0 ) + vec2(time / 17.0, time / 29.0); vec2 uv1 = uv / 107.0-vec2( time / -19.0, time / 31.0 ); vec2 uv2 = uv / vec2( 8907.0, 9803.0 ) + vec2( time / 101.0, time / 97.0 ); vec2 uv3 = uv / vec2( 1091.0, 1027.0 ) - vec2( time / 109.0, time / -113.0 ); vec4 noise = texture2D( normalSampler, uv0 ) + texture2D( normalSampler, uv1 ) + texture2D( normalSampler, uv2 ) + texture2D( normalSampler, uv3 ); return noise * 0.5 - 1.0; } void sunLight( const vec3 surfaceNormal, const vec3 eyeDirection, float shiny, float spec, float diffuse, inout vec3 diffuseColor, inout vec3 specularColor ) { vec3 reflection = normalize( reflect( -sunDirection, surfaceNormal ) ); float direction = max( 0.0, dot( eyeDirection, reflection ) ); specularColor += pow( direction, shiny ) * sunColor * spec; diffuseColor += max( dot( sunDirection, surfaceNormal ), 0.0 ) * sunColor * diffuse; } #include #include #include #include #include #include #include #include void main() { #include vec4 noise = getNoise( worldPosition.xy * size ); vec3 surfaceNormal = normalize( noise.xyz * vec3( 1.5, 1.0, 1.5 ) ); vec3 diffuseLight = vec3(0.0); vec3 specularLight = vec3(0.0); vec3 worldToEye = eye-worldPosition.xyz; vec3 eyeDirection = normalize( worldToEye ); sunLight( surfaceNormal, eyeDirection, 100.0, 2.0, 0.5, diffuseLight, specularLight ); float distance = length(worldToEye); vec2 distortion = surfaceNormal.xy * ( 0.001 + 1.0 / distance ) * distortionScale; vec3 reflectionSample = vec3( texture2D( mirrorSampler, mirrorCoord.xy / mirrorCoord.w + distortion ) ); float theta = max( dot( eyeDirection, surfaceNormal ), 0.0 ); float rf0 = 0.3; float reflectance = rf0 + ( 1.0 - rf0 ) * pow( ( 1.0 - theta ), 5.0 ); vec3 scatter = max( 0.0, dot( surfaceNormal, eyeDirection ) ) * waterColor; vec3 albedo = mix( ( sunColor * diffuseLight * 0.3 + scatter ) * getShadowMask(), ( vec3( 0.1 ) + reflectionSample * 0.9 + reflectionSample * specularLight ), reflectance); vec3 outgoingLight = albedo; gl_FragColor = vec4( outgoingLight, alpha ); #include #include }`