update external headers

ios/include/filament/LightManager.h

@@ -273,6 +273,7 @@ public:
          * Constant bias in depth-resolution units by which shadows are moved away from the
          * light. The default value of 0.5 is used to round depth values up.
          * Generally this value shouldn't be changed or at least be small and positive.
+         * This is ignored when the View's ShadowType is set to VSM.
          */
         float polygonOffsetConstant = 0.5f;
 
@@ -281,6 +282,7 @@ public:
          * away from the light. The default value of 2.0 works well with SHADOW_SAMPLING_PCF_LOW.
          * Generally this value is between 0.5 and the size in texel of the PCF filter.
          * Setting this value correctly is essential for LISPSM shadow-maps.
+         * This is ignored when the View's ShadowType is set to VSM.
          */
         float polygonOffsetSlope = 2.0f;
 
@@ -332,6 +334,12 @@ public:
              */
             float blurWidth = 0.0f;
         } vsm;
+
+        /**
+         * Light bulb radius used for soft shadows. Currently this is only used when DPCF or PCSS is
+         * enabled. (2cm by default).
+         */
+        float shadowBulbRadius = 0.02f;
     };
 
     struct ShadowCascades {
@@ -558,10 +566,11 @@ public:
          * and are defined by the angle from the center axis to where the falloff begins (i.e.
          * cones are defined by their half-angle).
          *
-         * @param inner inner cone angle in *radians* between 0 and @f$ \pi/2 @f$
-         *
-         * @param outer outer cone angle in *radians* between \p inner and @f$ \pi/2 @f$
+         * Both inner and outer are silently clamped to a minimum value of 0.5 degrees
+         * (~0.00873 radians) to avoid floating-point precision issues during rendering.
          *
+         * @param inner inner cone angle in *radians* between 0.00873 and \p outer
+         * @param outer outer cone angle in *radians* between 0.00873 inner and @f$ \pi/2 @f$
          * @return This Builder, for chaining calls.
          *
          * @note
@@ -812,8 +821,8 @@ public:
      * Dynamically updates a spot light's cone as angles
      *
      * @param i     Instance of the component obtained from getInstance().
-     * @param inner inner cone angle in *radians* between 0 and pi/2
-     * @param outer outer cone angle in *radians* between inner and pi/2
+     * @param inner inner cone angle in *radians* between 0.00873 and outer
+     * @param outer outer cone angle in *radians* between 0.00873 and pi/2
      *
      * @see Builder.spotLightCone()
      */