73 lines
1.7 KiB
GLSL
73 lines
1.7 KiB
GLSL
/**
|
|
* @file waterV.glsl
|
|
*
|
|
* Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
|
|
* $License$
|
|
*/
|
|
|
|
void calcAtmospherics(vec3 inPositionEye);
|
|
|
|
uniform vec2 d1;
|
|
uniform vec2 d2;
|
|
uniform float time;
|
|
uniform vec3 eyeVec;
|
|
uniform float waterHeight;
|
|
|
|
varying vec4 refCoord;
|
|
varying vec4 littleWave;
|
|
varying vec4 view;
|
|
|
|
float wave(vec2 v, float t, float f, vec2 d, float s)
|
|
{
|
|
return (dot(d, v)*f + t*s)*f;
|
|
}
|
|
|
|
void main()
|
|
{
|
|
//transform vertex
|
|
vec4 position = gl_Vertex;
|
|
mat4 modelViewProj = gl_ModelViewProjectionMatrix;
|
|
|
|
vec4 oPosition;
|
|
|
|
//get view vector
|
|
vec3 oEyeVec;
|
|
oEyeVec.xyz = position.xyz-eyeVec;
|
|
|
|
float d = length(oEyeVec.xy);
|
|
float ld = min(d, 2560.0);
|
|
|
|
position.xy = eyeVec.xy + oEyeVec.xy/d*ld;
|
|
view.xyz = oEyeVec;
|
|
|
|
d = clamp(ld/1536.0-0.5, 0.0, 1.0);
|
|
d *= d;
|
|
|
|
oPosition = position;
|
|
oPosition.z = mix(oPosition.z, max(eyeVec.z*0.75, 0.0), d);
|
|
oPosition = modelViewProj * oPosition;
|
|
refCoord.xyz = oPosition.xyz + vec3(0,0,0.2);
|
|
|
|
//get wave position parameter (create sweeping horizontal waves)
|
|
vec3 v = position.xyz;
|
|
v.x += (cos(v.x*0.08/*+time*0.01*/)+sin(v.y*0.02))*6.0;
|
|
|
|
//push position for further horizon effect.
|
|
position.xyz = oEyeVec.xyz*(waterHeight/oEyeVec.z);
|
|
position.w = 1.0;
|
|
position = position*gl_ModelViewMatrix;
|
|
|
|
calcAtmospherics((gl_ModelViewMatrix * gl_Vertex).xyz);
|
|
|
|
|
|
//pass wave parameters to pixel shader
|
|
vec2 bigWave = (v.xy) * vec2(0.04,0.04) + d1 * time * 0.055;
|
|
//get two normal map (detail map) texture coordinates
|
|
littleWave.xy = (v.xy) * vec2(0.45, 0.9) + d2 * time * 0.13;
|
|
littleWave.zw = (v.xy) * vec2(0.1, 0.2) + d1 * time * 0.1;
|
|
view.w = bigWave.y;
|
|
refCoord.w = bigWave.x;
|
|
|
|
gl_Position = oPosition;
|
|
}
|