In this example I placed a line tangent to an arc. The line cuts through the arc instead of ending at the arc. This is a display problem. The arc has an incremental angle value that contains decimals (e.g. 53.98). QuickDraw does not understand such arcs, so to display the object, it must be defined as a polygon, leading to the inaccurate display. THE DATABASE IS CORRECT. So the modifier is finding the point of true intersection, even though the display is incorrect.
Workaround:
Round arcs to nearest whole decimal value (e.g. 54), then display will be correct. This problem will not be fixed until there is a new version of QuickDraw.
Q. When I use a modifier to resize an object, the object is not resized accurately. (i.e. the line extends past the intersection point). This did not happen in Claris CAD 1.0. What am I doing wrong?
A. You're not doing anything wrong. This sometimes happens when the preview cursor is off. We suggest using the preview cursor when using modifiers. You can tell that the preview cursor is on if when you hover over an object, the cursor turns hollow. You can quickly turn the preview cursor on or off when you type "k" or "K" key on your keyboard.
Note: This problem has been resolved in 2.0v2.