@polygonjs/polygonjs/dist/src/core/lights/spotlight/glsl/frag.glsl.js

node-based WebGL 3D engine https://polygonjs.com

export default "varying vec3 vNormal;\nvarying vec3 vWorldPosition;\nvarying vec3 vWorldOrigin;\n\nuniform vec3 lightColor;\n\n// uniform vec3 spotPosition;\n\nuniform float attenuation;\nuniform float anglePower;\n\nvoid main(){\n\n	//////////////////////////////////////////////////////////\n	// distance attenuation   //\n	//////////////////////////////////////////////////////////\n	float intensity = distance(vWorldPosition, vWorldOrigin) / attenuation;\n	intensity = 1.0 - clamp(intensity, 0.0, 1.0);\n\n	//////////////////////////////////////////////////////////\n	// intensity on angle   //\n	//////////////////////////////////////////////////////////\n	vec3 normal = vec3(vNormal.x, vNormal.y, abs(vNormal.z));\n	float angleIntensity = pow( dot(normal, vec3(0.0, 0.0, 1.0)), anglePower );\n	intensity = intensity * angleIntensity;\n	// 'gl_FragColor = vec4( lightColor, intensity );\n\n	//////////////////////////////////////////////////////////\n	// final color   //\n	//////////////////////////////////////////////////////////\n\n	// set the final color\n	gl_FragColor = vec4( lightColor, intensity);\n}";