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ALS maintenance: bugfix for cloud impostors, 'inverse' Mie for cloud shader, glare for translucent objects proportional to 1-alpha rather than on-off

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Thorsten Renk 2016-06-12 15:22:11 +03:00
parent 1d0c206418
commit 379dd17b3d
3 changed files with 66 additions and 6 deletions
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42
Effects/cloud-impostor.eff
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@ -60,6 +60,8 @@
<program>
<vertex-shader>Shaders/cloud-impostor-ALS.vert</vertex-shader>
<fragment-shader>Shaders/cloud-static-ALS.frag</fragment-shader>
<fragment-shader>Shaders/noise.frag</fragment-shader>
<fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
</program>
<uniform>
<name>baseTexture</name>
@ -96,6 +98,46 @@
<type>float</type>
<value><use>air_pollution</use></value>
</uniform>
<uniform>
<name>gamma</name>
<type>float</type>
<value><use>gamma</use></value>
</uniform>
<uniform>
<name>brightness</name>
<type>float</type>
<value><use>brightness</use></value>
</uniform>
<uniform>
<name>use_filtering</name>
<type>bool</type>
<value><use>use_filtering</use></value>
</uniform>
<uniform>
<name>use_night_vision</name>
<type>bool</type>
<value><use>use_night_vision</use></value>
</uniform>
<uniform>
<name>use_IR_vision</name>
<type>bool</type>
<value><use>use_IR_vision</use></value>
</uniform>
<uniform>
<name>delta_T</name>
<type>float</type>
<value><use>delta_T</use></value>
</uniform>
<uniform>
<name>display_xsize</name>
<type>int</type>
<value><use>display_xsize</use></value>
</uniform>
<uniform>
<name>display_ysize</name>
<type>int</type>
<value><use>display_ysize</use></value>
</uniform>
<vertex-program-two-side>true</vertex-program-two-side>
</pass>
</technique>

26
Shaders/3dcloud-ALS.vert
View file

@ -209,15 +209,16 @@ void main(void)
// Mie correction
float Mie;
float MieFactor;
float Mie = 0.0;
float MieFactor = 0.0;
if (bottom_factor > 0.6)
if (bottom_factor > 0.4)
{
MieFactor = dot(normalize(lightFull), normalize(relVector));
Mie = 1.5 * smoothstep(0.9,1.0, MieFactor) * smoothstep(0.6, 0.8, bottom_factor) * (1.0-earthShadeFactor) ;
//if (MieFactor < 0.0) {Mie = - Mie;}
}
else {Mie = 0.0;}
//else {Mie = 0.0;}
if (Mie > 0.0)
{
@ -229,6 +230,23 @@ void main(void)
gl_FrontColor.g = mie_func(gl_FrontColor.g, 0.8* Mie);
gl_FrontColor.b = mie_func(gl_FrontColor.b, 0.5*Mie);
}
else if (MieFactor < 0.0)
{
float thickness_reduction = smoothstep(0.4, 0.8, bottom_factor) ;
float light_reduction = dot (lightFull, lightHorizon);
light_reduction *= light_reduction;
float factor_b = 0.8 + 0.2 * (1.0 - smoothstep(0.0, 0.7, -MieFactor) * thickness_reduction * light_reduction) ;
float factor_r = 0.6 + 0.4 * (1.0 - smoothstep(0.0, 0.7, -MieFactor) * thickness_reduction * light_reduction) ;
float factor_g = 0.65 + 0.35 * (1.0 - smoothstep(0.0, 0.7, -MieFactor) * thickness_reduction * light_reduction) ;
hazeColor.r *= factor_r;
hazeColor.g *= factor_g;
hazeColor.b *= factor_b;
gl_FrontColor.r *= factor_r;
gl_FrontColor.g *= factor_g;
gl_FrontColor.b *= factor_b;
}
gl_FrontColor.rgb = gl_FrontColor.rgb + moonLightColor * earthShadeFactor;
hazeColor.rgb = hazeColor.rgb + moonLightColor * earthShadeFactor;

4
Shaders/model-ALS-ultra.frag
View file

@ -253,8 +253,8 @@ void main (void)
//glare on the backside of tranparent objects
if ((gl_FrontMaterial.diffuse.a < 1.0 || texel.a < 1.0)
&& dot(N, normalize(gl_LightSource[0].position.xyz)) < 0.0) {
nDotVP = max(0.0, dot(-N, normalize(gl_LightSource[0].position.xyz)));
nDotHV = max(0.0, dot(-N, normalize(gl_LightSource[0].halfVector.xyz)));
nDotVP = max(0.0, dot(-N, normalize(gl_LightSource[0].position.xyz)) * (1.0 -texel.a) );
nDotHV = max(0.0, dot(-N, normalize(gl_LightSource[0].halfVector.xyz)) * (1.0 -texel.a) );
}
float nDotVP1 = 0.0;