strata-game-library/shaders / furFragmentShader

Variable: furFragmentShader

const furFragmentShader: "\n uniform vec3 colorBase;\n uniform vec3 colorTip;\n \n varying vec2 vUv;\n varying float vLayer;\n varying vec3 vNormal;\n \n // Simple hash for procedural strands\n float hash(vec2 p) {\n return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);\n }\n \n void main() {\n // Procedural strand pattern via noise\n float strandNoise = hash(floor(vUv * 50.0));\n \n // Density falloff on outer layers (tapering effect)\n float density = 1.0 - vLayer * 0.8;\n \n // Alpha test for strands\n if (step(strandNoise, density) < 0.5) discard;\n \n // Color gradient from base to tip\n vec3 col = mix(colorBase, colorTip, vLayer);\n \n // Ambient occlusion at roots\n float ao = 0.4 + 0.6 * vLayer;\n col *= ao;\n \n // Rim lighting effect for depth perception\n float rim = 1.0 - abs(dot(vNormal, vec3(0.0, 0.0, 1.0)));\n col += vec3(0.1) * rim * vLayer;\n \n gl_FragColor = vec4(col, 1.0);\n }\n"

Defined in: fur.ts:40