Resolve light-source position/direction when updated

Source/platform/graphics/filters/LightSource.h

Index: Source/platform/graphics/filters/LightSource.h
diff --git a/Source/platform/graphics/filters/LightSource.h b/Source/platform/graphics/filters/LightSource.h
index ecd9271c408136228839852bd4e4cff8bb23c756..b9f198615084354e52cacc03215500d17efa74c4 100644
--- a/Source/platform/graphics/filters/LightSource.h
+++ b/Source/platform/graphics/filters/LightSource.h
@@ -77,12 +77,8 @@ public:
 
     virtual bool setAzimuth(float) { return false; }
     virtual bool setElevation(float) { return false; }
-    virtual bool setX(float) { return false; }
-    virtual bool setY(float) { return false; }
-    virtual bool setZ(float) { return false; }
-    virtual bool setPointsAtX(float) { return false; }
-    virtual bool setPointsAtY(float) { return false; }
-    virtual bool setPointsAtZ(float) { return false; }
+    virtual bool setPosition(const FloatPoint3D&) { return false; }
+    virtual bool setPointsAt(const FloatPoint3D&) { return false; }
     virtual bool setSpecularExponent(float) { return false; }
     virtual bool setLimitingConeAngle(float) { return false; }