Changed handling of invalid calls

1 files changed, 14 insertions, 3 deletions

diff --git a/vectorgfx.mod/vectorgfx.bmx b/vectorgfx.mod/vectorgfx.bmx
index fbf5064..3da763a 100644
--- a/vectorgfx.mod/vectorgfx.bmx
+++ b/vectorgfx.mod/vectorgfx.bmx
@@ -328,10 +328,13 @@ Type TVectorGfxObject
 	bbdoc: Whether a point is inside the object
 	returns: True if the point lies inside the object.  The object is assumed to be a closed polygon for this test.
 	about: @cx, @cy is the point to test.
-	about: Calling it before drawing the object will cause runtime errors.
 	about: This routine is based on code from comp.graphics.algorithms FAQ 2.03
 	EndRem
 	Method IsInside:Int(cx:Int, cy:Int)
+		If rotated=Null
+			Return False
+		EndIf
+		
 		Local cross:Int=False
 		
 		For Local l:TVectorGfxLine=EachIn lines
@@ -352,9 +355,13 @@ Type TVectorGfxObject
 	bbdoc: A line's adjusted co-ordinates.
 	returns: The rotated and scaled points (in object co-ordinates) of the line.
 	about: @i is the index of the line to return the points for.
-	about: Calling it before drawing the object will cause runtime errors.
+	about: Calling it before drawing the object will return null.
 	EndRem
 	Method AdjustedCoords:TVectorGfxPoint[](i:Int)
+		If rotated=Null
+			Return Null
+		EndIf
+		
 		Local p:TVectorGfxPoint[]=New TVectorGfxPoint[2]
 		Local l:TVectorGfxLine=lines[i]
 		p[0]=rotated[l.i1]
@@ -366,9 +373,13 @@ Type TVectorGfxObject
 	bbdoc: A line's normal.
 	returns: The normal of the selected line.
 	about: @i is the index of the line to return the normal of.  This will return the normal due to the rotation of the object after the object is drawn.
-	about: Calling it before drawing the object will cause runtime errors.
+	about: Calling it before drawing the object will return null.
 	EndRem
 	Method Normal:TVector(i:Int)
+		If rotated=Null
+			Return Null
+		EndIf
+
 		Local l:TVectorGfxLine=lines[i]
 		Local v:TVector=TVector.Create(rotated[l.i2].y-rotated[l.i1].y,rotated[l.i1].x-rotated[l.i2].x)
 		v.Normalise()