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Raindrop effect for wet runway

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Thorsten Renk 2014-11-01 20:10:55 +02:00
parent 8cf4460729
commit 997854abab
2 changed files with 20 additions and 2 deletions
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5
Effects/runway.eff
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@ -237,6 +237,11 @@
<type>float</type>
<value><use>wetness</use></value>
</uniform>
<uniform>
<name>rain_norm</name>
<type>float</type>
<value><use>rnorm</use></value>
</uniform>
<uniform>
<name>fogstructure</name>
<type>float</type>

17
Shaders/runway-ALS.frag
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@ -27,6 +27,7 @@ uniform float snowlevel;
uniform float dust_cover_factor;
uniform float lichen_cover_factor;
uniform float wetness;
uniform float rain_norm;
uniform float fogstructure;
uniform float snow_thickness_factor;
uniform float cloud_self_shading;
@ -34,6 +35,7 @@ uniform float uvstretch;
uniform float landing_light1_offset;
uniform float landing_light2_offset;
uniform float air_pollution;
uniform float osg_SimulationTime;
uniform int quality_level;
uniform int tquality_level;
@ -52,6 +54,7 @@ float mie_angle;
float shadow_func (in float x, in float y, in float noise, in float dist);
float Noise2D(in vec2 coord, in float wavelength);
float DotNoise2D(in vec2 coord, in float wavelength, in float fractionalMaxDotSize, in float dot_density);
float fog_func (in float targ, in float alt);
float light_distance_fading(in float dist);
float fog_backscatter(in float avisibility);
@ -249,15 +252,25 @@ if ((dist < 5000.0)&& (quality_level > 3) && (wetness>0.0))
* light_specular.rgb
* pow(NdotHV, max(4.0, (20.0 * water_factor))));
}
// secondary reflection of sky irradiance
float fresnelW = ((0.8 * wetness) + (0.2* water_factor)) * (1.0-smoothstep(0.0,0.4, dot(E,n)));
// raindrops
float rain_factor = 0.0;
if (rain_norm > 0.0)
{
rain_factor += DotNoise2D(rawPos.xy, 0.2 ,0.5, rain_norm) * abs(sin(6.0*osg_SimulationTime));
rain_factor += DotNoise2D(rawPos.xy, 0.3 ,0.4, rain_norm) * abs(sin(6.0*osg_SimulationTime + 2.094));
rain_factor += DotNoise2D(rawPos.xy, 0.4 ,0.3, rain_norm)* abs(sin(6.0*osg_SimulationTime + 4.188));
}
// secondary reflection of sky irradiance
float fresnelW = ((0.8 * wetness) + (0.2* water_factor)) * (1.0-smoothstep(0.0,0.4, dot(E,n) * 1.0 - 0.2 * rain_factor * wetness));
float sky_factor = (1.0-ct*ct);//mix((1.0 - ct * ct), 1.0-effective_scattering, effective_scattering);
float sky_light = vec3 (1.0,1.0,1.0) * length(light_specular.rgb) * (1.0-effective_scattering);
specular.rgb += sky_factor * fresnelW * sky_light;
//specular.rgb *= 1.0 - 0.2 * dotnoise_02m * wetness;
color.a = 1.0;//diffuse_term.a;
// This shouldn't be necessary, but our lighting becomes very