diff options
| -rw-r--r-- | vectorgfx.mod/vectorgfx.bmx | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/vectorgfx.mod/vectorgfx.bmx b/vectorgfx.mod/vectorgfx.bmx index 57df6ee..fbf5064 100644 --- a/vectorgfx.mod/vectorgfx.bmx +++ b/vectorgfx.mod/vectorgfx.bmx @@ -325,10 +325,34 @@ Type TVectorGfxObject End Method Rem + 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) + Local cross:Int=False + + For Local l:TVectorGfxLine=EachIn lines + Local x1:Int=x+rotated[l.i1].x + Local y1:Int=y+rotated[l.i1].y + Local x2:Int=x+rotated[l.i2].x + Local y2:Int=y+rotated[l.i2].y + + If ((((y1<=cy) And (cy<y2)) Or ((y2<=cy) And (cy<y1))) And (cx < (x2 - x1) * (cy - y1) / (y2 - y1) + x1)) + cross=Not cross + EndIf + Next + + Return cross + End Method + + Rem bbdoc: A line's adjusted co-ordinates. - returns: The rotated points (in object co-ordinates) of the line. + 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 then will cause runtime errors. + about: Calling it before drawing the object will cause runtime errors. EndRem Method AdjustedCoords:TVectorGfxPoint[](i:Int) Local p:TVectorGfxPoint[]=New TVectorGfxPoint[2] @@ -342,7 +366,7 @@ 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 then will cause runtime errors. + about: Calling it before drawing the object will cause runtime errors. EndRem Method Normal:TVector(i:Int) Local l:TVectorGfxLine=lines[i] |