0.0, 0.8
0.2, 0.0
0.2, 0.2
0.2, 0.2
1.8, 0.2
0.9, 0.9, 0.9
0.6, 0.6,0.6
(* "standard time" 0.8)
0.0, 0.15
struct app2vertex {
float4 Position : POSITION;
float3 Normal : NORMAL;
float2 TexCoord : TEXCOORD0;
};
struct vertex2fragment {
float4 Position : POSITION;
float2 TexCoord0 : TEXCOORD0;
float2 TexCoord1 : TEXCOORD1;
float2 TexCoord2 : TEXCOORD2;
float2 TexCoord3 : TEXCOORD3;
float3 LightIntensity : TEXCOORD4;
};
vertex2fragment main (app2vertex IN,
uniform float4x4 ModelViewI : state.matrix.modelview.inverse,
uniform float4x4 ModelViewIT : state.matrix.modelview.invtrans,
uniform float4x4 ModelViewProj : state.matrix.mvp,
uniform float time,
uniform float2 windvec,
uniform float2 specular,
uniform float2 control1,
uniform float2 control2,
uniform float2 control3,
uniform float3 LightColor)
{
vertex2fragment OUT;
// Create some turbulence
// to apply to the smallest noise.
float sine, cosine;
sincos (time/10.0, sine, cosine);
float2 turbulence;
turbulence.x = sine * 0.2;
turbulence.y = -cosine * 0.2;
// Create a wind vector based on time.
float2 wind;
wind.x = - time * windvec.x * 0.1;
wind.y = - time * windvec.y * 0.1;
OUT.Position = mul (ModelViewProj, IN.Position);
OUT.TexCoord0 = specular + (IN.TexCoord + wind)/8.0;
OUT.TexCoord1 = control1 + (IN.TexCoord + wind)/4.0;
OUT.TexCoord2 = control2 + (IN.TexCoord + wind*2.2)/2.0;
OUT.TexCoord3 = control3 + (IN.TexCoord + wind + turbulence)/1.0;
OUT.LightIntensity = IN.Position;
return OUT;
}
struct vertex2fragment {
float4 Position : POSITION;
float2 TexCoord0 : TEXCOORD0;
float2 TexCoord1 : TEXCOORD1;
float2 TexCoord2 : TEXCOORD2;
float2 TexCoord3 : TEXCOORD3;
float3 LightIntensity : TEXCOORD4;
};
float4 main (vertex2fragment IN,
uniform float time,
uniform float2 mnvars,
uniform float3 cloudcol,
uniform float3 skycol,
uniform float3 sun_vec,
uniform sampler2D diffuse,
uniform sampler2D noise1,
uniform sampler2D noise2,
uniform sampler2D noise3) : COLOR
{
float4 n1 = tex2D(noise3, IN.TexCoord0);
float4 n2 = tex2D(noise3, IN.TexCoord1.yx);
float4 n3 = tex2D(noise3, IN.TexCoord2);
float4 n4 = tex2D(noise3, IN.TexCoord3);
float4 fbm = 0.5000 * n1;
fbm += 0.2000 * n2;
fbm += 0.1050 * n3;
fbm += 0.0625 * n4;
// remaping: scale, bias, threshold
fbm = saturate( (fbm * mnvars.x) + mnvars.y);
//float4 ray = {0.0, 0.3, 0.6, 0.9};
float4 ray = dot(normalize(IN.LightIntensity), sun_vec);
float4 de = max( 0.0, (fbm - ray) );
// integration : de.w = 0.25*(de.x+de.y+de.z+de.w)
de.w = dot(de, 0.25);
cloudcol = lerp (float3(0.05,0.05,0.1), cloudcol, time);
skycol = lerp (float3(0.2,0.2,0.3), skycol, time);
// calc cloud color
float4 result;
result.xyz = lerp(skycol, cloudcol, de.w);
fbm.w = 1 - fbm.w;
result.w = fbm.w;
return result;
}