added a document header structure

added signal emissions

moved emit calls

added an MVC interface to the primitives tree

fixed removing objects causing some other objects to disappear

optimized triangle count

fixed: LDDocument created one removal connection to the model for each object added, so removing an object from a model of 9 objects added 9 deletion entries to history

renamed signal

(0) -1000 -300 -100 -30 -10 -8 +8 +10 +30 +100 tip

mercurial