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#version 120
uniform mat4 mWorldViewProj;
uniform mat4 mInvWorld;
uniform mat4 mTransWorld;
uniform float dayNightRatio;
uniform float animationTimer;
uniform float enableWavingWater;
uniform float waterWaveLength;
uniform float waterWaveHeight;
uniform float waterWaveSpeed;
uniform vec3 eyePosition;
varying vec3 vPosition;
varying vec3 eyeVec;
void main(void)
{
if (enableWavingWater == 1.0){
vec4 pos2 = gl_Vertex;
pos2.y -= 2.0;
pos2.y -= sin (pos2.z/waterWaveLength + animationTimer * waterWaveSpeed * waterWaveLength) * waterWaveHeight
+ sin ((pos2.z/waterWaveLength + animationTimer * waterWaveSpeed * waterWaveLength) / 7.0) * waterWaveHeight;
gl_Position = mWorldViewProj * pos2;
} else
gl_Position = mWorldViewProj * gl_Vertex;
eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
vPosition = (mWorldViewProj * gl_Vertex).xyz;
vec4 color;
//color = vec4(1.0, 1.0, 1.0, 1.0);
float day = gl_Color.r;
float night = gl_Color.g;
float light_source = gl_Color.b;
/*color.r = mix(night, day, dayNightRatio);
color.g = color.r;
color.b = color.r;*/
float rg = mix(night, day, dayNightRatio);
rg += light_source * 2.5; // Make light sources brighter
float b = rg;
// Moonlight is blue
b += (day - night) / 13.0;
rg -= (day - night) / 13.0;
// Emphase blue a bit in darker places
// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
b += max(0.0, (1.0 - abs(b - 0.13)/0.17) * 0.025);
// Artificial light is yellow-ish
// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
rg += max(0.0, (1.0 - abs(rg - 0.85)/0.15) * 0.065);
color.r = clamp(rg,0.0,1.0);
color.g = clamp(rg,0.0,1.0);
color.b = clamp(b,0.0,1.0);
color.a = gl_Color.a;
gl_FrontColor = gl_BackColor = color;
gl_TexCoord[0] = gl_MultiTexCoord0;
}
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