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Fresnel reflection for ALS runway shader

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This commit is contained in:
Thorsten Renk 2014-05-14 12:45:54 +03:00
parent ce69c03793
commit 27438ea54c
1 changed files with 10 additions and 14 deletions

20
Shaders/runway-lightfield.frag
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@ -214,11 +214,6 @@ float noise_2000m = Noise2D(rawPos.xy, 2000.0);
float snow_alpha;
//float view_angle = abs(dot(normal, normalize(ecViewdir)));
//if ((quality_level > 3)&&(relPos.z + eye_alt +500.0 > snowlevel))
if (quality_level > 3)
{
float sfactor;
@ -280,27 +275,31 @@ if ((dist < 5000.0)&& (quality_level > 3) && (wetness>0.0))
// light computations
vec4 light_specular = gl_LightSource[0].specular;
eShade = 0.9 * smoothstep(terminator_width+ terminator, -terminator_width + terminator, yprime_alt) + 0.1;
vec4 light_specular = gl_LightSource[0].specular * eShade;
// If gl_Color.a == 0, this is a back-facing polygon and the
// normal should be reversed.
n = normal;
n = normalize(n);
float fresnel;
NdotL = dot(n, lightDir);
if (quality_level > 4)
{
NdotL = NdotL + (3.0 * N.r + 0.1 * (noise_01m-0.5))* (1.0 - water_factor) ;
}
if (NdotL > 0.0) {
if (NdotL > 0.0)
{
if (cloud_shadow_flag == 1)
{NdotL = NdotL * shadow_func(relPos.x, relPos.y, 1.0, dist);}
color += diffuse_term * NdotL;
NdotHV = max(dot(n, halfVector), 0.0);
specular.rgb = ((gl_FrontMaterial.specular.rgb + (water_factor * vec3 (1.0, 1.0, 1.0)))
fresnel = 1.0 + 5.0 * (1.0-smoothstep(0.0,0.2, dot(normalize(ecViewdir),n)));
specular.rgb = ((vec3 (0.2,0.2,0.2) * fresnel + (water_factor * vec3 (1.0, 1.0, 1.0)))
* light_specular.rgb
* pow(NdotHV, gl_FrontMaterial.shininess + (20.0 * water_factor)));
* pow(NdotHV, max(4.0, (20.0 * water_factor))));
}
color.a = 1.0;//diffuse_term.a;
// This shouldn't be necessary, but our lighting becomes very
@ -430,9 +429,6 @@ hazeColor.g = light_func(lightArg, 3.931e-06, 0.264, 3.827, 7.93e-06, 1.0);
hazeColor.r = light_func(lightArg, 8.305e-06, 0.161, 3.827, 3.04e-05, 1.0);
// now dim the light for haze
eShade = 0.9 * smoothstep(terminator_width+ terminator, -terminator_width + terminator, yprime_alt) + 0.1;
// Mie-like factor
if (lightArg < 10.0)