STR #1976

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STR #1976

Application:	FLTK Library
Status:	5 - New
Priority:	1 - Request for Enhancement, e.g. asking for a feature
Scope:	3 - Applies to all machines and operating systems
Subsystem:	Unassigned
Summary:	I would like a "inverse" transform() (device to user coordinates)
Version:	2.0-feature
Created By:	craigd
Assigned To:	Unassigned
Fix Version:	Unassigned
Update Notification:	Receive EMails Don't Receive EMails

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#1	craigd 12:15 May 29, 2008

transform(x,y) converts from user coordinates to device coordinates but there isn't a function to go the other direction: device to user coordinates. This is a useful function for CAD type applications. Rational: I have a model that I render. As the cursor is moved around the rendered model, the user coordinates are displayed. Currently, it seems I must do the calculation manually (from quick look through path.cxx). Even if there was a invert_and_return_current_transform_matrix(), I'm not able call transform() with that matrix without some gyrations with push/pop_matrix. I'm looking for something trival.

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