Common.ShaderLib.MaterialFog.glsllib Maven / Gradle / Ivy

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vec4 getFogLinear(in vec4 diffuseColor, in vec4 fogColor, in float start, in float end, in float distance) {

    float fogFactor = (end - distance) / (end - start);
    fogFactor = clamp(fogFactor, 0.0, 1.0);

    return mix(fogColor, diffuseColor, fogFactor);
}

vec4 getFogExp(in vec4 diffuseColor, in vec4 fogColor, in float fogDensity, in float distance) {

    float fogFactor = 1.0 / exp(distance * fogDensity);
    fogFactor = clamp( fogFactor, 0.0, 1.0 );

    return mix(fogColor, diffuseColor, fogFactor);
}

vec4 getFogExpSquare(in vec4 diffuseColor, in vec4 fogColor, in float fogDensity, in float distance) {

    float fogFactor = 1.0 / exp( (distance * fogDensity) * (distance * fogDensity));
    fogFactor = clamp( fogFactor, 0.0, 1.0 );

    vec4 finalColor = mix(fogColor, diffuseColor, fogFactor);
    return finalColor;
}