KSP-Conformal-Decals/Assets/ConformalDecals/Shaders/Decal/TextDecal.cginc

#include "DecalsCommon.cginc"
#include "../SDF.cginc"

float4 _DecalColor;

float4 _OutlineColor;
float _OutlineWidth;

void surf(DecalSurfaceInput IN, inout SurfaceOutput o) {
    float4 color = _DecalColor;
    o.Specular = 0.4;
    o.Gloss = _Shininess;

    float dist = _Cutoff - tex2D(_Decal, IN.uv_decal).r; // text distance

    #ifdef DECAL_OUTLINE
        // Outline
        float outlineOffset = _OutlineWidth * 0.25;
        float outlineRadius = _OutlineWidth * 0.5;
        
        #ifdef DECAL_FILL
            // Outline and Fill
            float outlineDist = -dist - outlineOffset;
            float outlineFactor = SDFAA(outlineDist);
            dist -= outlineOffset;
            color = lerp(_DecalColor, _OutlineColor, outlineFactor);
        #else
            // Outline Only
            float outlineDist = abs(dist) - outlineOffset;
            dist = outlineDist;
            color = _OutlineColor;
        #endif
    #endif

    dist = max(dist, BoundsDist(IN.uv, IN.vertex_normal, _DecalNormal));
    float ddist = SDFdDist(dist); // distance gradient magnitude
    o.Albedo = color.rgb;
    o.Alpha *= SDFAA(dist, ddist);

    #ifdef DECAL_BASE_NORMAL
        float3 normal = IN.normal;
        float wearFactor = 1 - normal.z;
        float wearFactorAlpha = saturate(_EdgeWearStrength * wearFactor);
        o.Alpha *= saturate(1 + _EdgeWearOffset - saturate(_EdgeWearStrength * wearFactor));
    #endif

    #ifdef DECAL_SPECMAP
        float4 specular = tex2D(_SpecMap, IN.uv_specmap);
        o.Specular = specular;
    #endif
}