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Configurable parameter support for detailed terrain shader quality level

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Thorsten Renk 2013-02-06 15:13:25 +02:00
parent 97349a17ef
commit 930b3d4fd5
2 changed files with 20 additions and 6 deletions
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14
Effects/terrain-default.eff
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@ -242,12 +242,12 @@
<type>float</type>
<value><use>intrinsic_wetness</use></value>
</uniform>
<uniform>
<uniform>
<name>transition_model</name>
<type>float</type>
<value><use>transition_model</use></value>
</uniform>
<uniform>
<uniform>
<name>hires_overlay_bias</name>
<type>float</type>
<value><use>hires_overlay_bias</use></value>
@ -586,6 +586,16 @@
<type>float</type>
<value><use>eye_alt</use></value>
</uniform>
<uniform>
<name>transition_model</name>
<type>float</type>
<value><use>transition_model</use></value>
</uniform>
<uniform>
<name>hires_overlay_bias</name>
<type>float</type>
<value><use>hires_overlay_bias</use></value>
</uniform>
<uniform>
<name>snowlevel</name>
<type>float</type>

12
Shaders/terrain-haze-detailed.frag
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@ -36,6 +36,8 @@ uniform float wetness;
uniform float fogstructure;
uniform float snow_thickness_factor;
uniform float cloud_self_shading;
uniform float transition_model;
uniform float hires_overlay_bias;
uniform int quality_level;
uniform int tquality_level;
@ -265,15 +267,17 @@ float mix_factor;
if (tquality_level > 2)
{
// first the second texture overlay
// transition model 0: random patch overlay without any gradient information
// transition model 1: only gradient-driven transitions, no randomness
if (mix_flag == 1)
{
nSum = 0.18 * (2.0 * noise_2000m + 2.0 * noise_1500m + noise_500m);
nSum = nSum + 0.4 * (1.0 -smoothstep(0.9,0.95, abs(steepness)));
nSum = mix(nSum, 0.5, max(0.0, 2.0 * (transition_model - 0.5)));
nSum = nSum + 0.4 * (1.0 -smoothstep(0.9,0.95, abs(steepness)+ 0.05 * (noise_50m - 0.5))) * min(1.0, 2.0 * transition_model);
mix_factor = smoothstep(0.5, 0.54, nSum);
texel = mix(texel, mix_texel, mix_factor);
texel = mix(texel, mix_texel, mix_factor);
}
// then the detail texture overlay
@ -290,7 +294,7 @@ if (tquality_level > 3)
dist_fact = 0.1 * smoothstep(15000.0,40000.0, dist) - 0.03 * (1.0 - smoothstep(500.0,5000.0, dist));
nSum = ((1.0 -noise_2000m) + noise_1500m + 2.0 * noise_250m +noise_50m)/5.0;
nSum = nSum - 0.08 * (1.0 -smoothstep(0.9,0.95, abs(steepness)));
mix_factor = smoothstep(0.47, 0.54, nSum - dist_fact);
mix_factor = smoothstep(0.47, 0.54, nSum +hires_overlay_bias - dist_fact);
if (mix_factor > 0.8) {mix_factor = 0.8;}
texel = mix(texel, detail_texel,mix_factor);
}