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/**
* @project Spring RTS
* @file bumpWaterVS.glsl
* @brief An extended bumpmapping water shader
* @author jK
*
* Copyright (C) 2008,2009. Licensed under the terms of the
* GNU GPL, v2 or later.
*/
//////////////////////////////////////////////////
// runtime defined constants are:
// #define SurfaceColor vec4
// #define DiffuseColor vec3
// #define PlaneColor vec4 (unused)
// #define AmbientFactor float
// #define DiffuseFactor float (note: it is the map defined value multipled with 15x!)
// #define SpecularColor vec3
// #define SpecularPower float
// #define SpecularFactor float
// #define PerlinStartFreq float
// #define PerlinFreq float
// #define PerlinAmp float
// #define Speed float
// #define FresnelMin float
// #define FresnelMax float
// #define FresnelPower float
// #define ScreenInverse vec2
// #define ViewPos vec2
// #define MapMid vec3
// #define SunDir vec3
// #define ReflDistortion float
// #define BlurBase vec2
// #define BlurExponent float
// #define PerlinStartFreq float
// #define PerlinLacunarity float
// #define PerlinAmp float
// #define WindSpeed float
// #define TexGenPlane vec4
// #define ShadingPlane vec4
//////////////////////////////////////////////////
// possible flags are:
// //#define opt_heightmap
// #define opt_reflection
// #define opt_refraction
// #define opt_shorewaves
// #define opt_depth
// #define opt_blurreflection
// #define opt_texrect
// #define opt_endlessocean
uniform float frame;
uniform mat4 projMatrix;
uniform mat4 viewMatrix;
uniform vec3 eyePos;
uniform vec2 windVector;
layout(location = 0) in vec3 vertexPosAttr;
out vec4 texCoord0;
out vec4 texCoord1;
out vec4 texCoord2;
out vec4 texCoord3;
out vec4 texCoord4;
out vec4 texCoord5;
out vec3 eyeVec;
out vec3 sunVec;
out vec3 worldPos;
out float fogCoord;
void main()
{
vec4 vertexPos = vec4(vertexPosAttr, 1.0);
// COMPUTE TEXCOORDS
texCoord0 = TexGenPlane * vertexPos.xzxz;
texCoord5.st = ShadingPlane.xy * vertexPos.xz;
// COMPUTE WAVE TEXTURE COORDS
float fstart = PerlinStartFreq;
float f = PerlinLacunarity;
texCoord1.st = (vec2(-1.0, -1.0) + texCoord0.pq + 0.75) * fstart + frame * WindSpeed * windVector;
texCoord1.pq = (vec2(-1.0, 1.0) + texCoord0.pq + 0.50) * fstart*f - frame * WindSpeed * windVector;
texCoord2.st = (vec2( 1.0, -1.0) + texCoord0.pq + 0.25) * fstart*f*f + frame * WindSpeed * windVector;
texCoord2.pq = (vec2( 1.0, 1.0) + texCoord0.pq + 0.00) * fstart*f*f*f + frame * WindSpeed * windVector;
texCoord3.st = texCoord0.pq * 160.0 + frame * 2.5;
texCoord3.pq = texCoord0.pq * 90.0 - frame * 2.0;
texCoord4.st = texCoord0.pq * 2.0;
texCoord4.pq = texCoord0.pq * 6.0 + frame * 0.37;
// SIMULATE WAVES
vertexPos.y = 3.0 * (cos(frame * 500.0 + vertexPosAttr.z) * sin(frame * 500.0 + vertexPosAttr.x / 1000.0));
// COMPUTE LIGHT VECTORS
eyeVec = eyePos - vertexPos.xyz;
sunVec = normalize(SunDir * 20000.0 + MapMid - vertexPos.xyz);
// FOG eye-depth
worldPos = vertexPos.xyz;
fogCoord = (viewMatrix * vertexPos).z;
// POSITION
gl_Position = projMatrix * viewMatrix * vertexPos;
}
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