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git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@550 bbaffbd6-741e-11dd-a85d-61de82d9cad9

fix engrave offset for models with a star-like shape (two adjacent lines removed instead of just one)


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removed some obsolete code


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append the default extension even if there is a dot in the start of the filename (not within the last five characters)


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make sure that floating inaccuracies don't cause two layers to generated instead of one (for zero height)


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accept missing "Default" sections


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 * now EngraveCutter respects the defined boundary box


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 * first move is always up to safety height (before: diagonal movement starting from the current position)
 * removed "start position" - it is not relevant for the resulting gcode


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@527 bbaffbd6-741e-11dd-a85d-61de82d9cad9

(this avoids a severe slow-down of the machine in case of too many small steps)


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changed "lightning" shortcut from "l" to "i" (to allow vi-like navigation)


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@524 bbaffbd6-741e-11dd-a85d-61de82d9cad9

skip unnecessary double-check of line collisions
moved "MODEL_TRANSFORMATIONS" from pycam.Geometry.Model to pycam.Geometry.Matrix (as "TRANSFORMATIONS")
fixed accidental reversion of contour model direction caused by some model transformations


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fixed triangle selection regarding "material allowance" (use cutter.distance_radius instead of cutter.radius)


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the GUI now handles an interrupted "generate_toolpath" properly


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@517 bbaffbd6-741e-11dd-a85d-61de82d9cad9

added an optional progress callback parameter for "get_offset_model" and "check_for_collisions", since these operations can be very time consuming
fixed the broken logic of the collision check
added a simple cache for derived offset models


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