Fixing lights and shadows

resources/shaders/night_fog_web.fragment

@@ -6,6 +6,8 @@ uniform int uPointLightCount;
 uniform vec3 uPointLightPos[4];
 uniform vec3 uPointLightDir[4];
 uniform vec3 uPointLightColor[4];
+uniform vec2 uPointLightWorldXZ[4];
+uniform vec2 uPointLightLimitXZ[4];
 uniform vec3 uAmbientColor;
 uniform vec3 uFogColor;
 
@@ -13,6 +15,7 @@ varying vec2 texCoord;
 varying float fogDistance;
 varying vec3 fragViewPos;
 varying vec3 fragNormal;
+varying vec2 fragWorldXZ;
 
 // cos(45 deg) = half-angle for a 90-degree full-angle spotlight
 const float SPOT_COS_OUTER = 0.7071;
@@ -46,7 +49,11 @@ void main()
 		float atten = 1.0 / (1.0 + 0.35 * dist + 0.15 * dist * dist);
 		float diff  = hasNormal ? max(dot(N, lightDir), 0.0) : 1.0;
 
-		lighting += uPointLightColor[i] * diff * atten * spotAtten;
+		vec2 worldDelta = abs(fragWorldXZ - uPointLightWorldXZ[i]);
+		float rectX = 1.0 - smoothstep(uPointLightLimitXZ[i].x - 0.5, uPointLightLimitXZ[i].x + 0.5, worldDelta.x);
+		float rectY = 1.0 - smoothstep(uPointLightLimitXZ[i].y - 0.5, uPointLightLimitXZ[i].y + 0.5, worldDelta.y);
+
+		lighting += uPointLightColor[i] * diff * atten * spotAtten * rectX * rectY;
 	}
 
 	color.rgb *= lighting;