Sightline 成员列表

成员的完整列表，这些成员属于Sightline，包括所有继承而来的成员

-	addTargetPoint:	Sightline
-	build	Sightline
-	clearResult	Sightline
-	initWith:	Sightline
	pointCount	Sightline
-	removeAllTargetPoints	Sightline
-	removeTargetPointofIndex:	Sightline
-	setTargetPoint:forIndex:	Sightline
-	targetPointOfIndex:	Sightline
	viewerPosition	Sightline