git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3985 dfc29bdd-3216-0410-991c-e03cc46cb475

Triangle selector improvements suggested by rogerborg a long time ago. Now fixed and properly working.

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Add triangleSelector improvements suggested by rogerborg. Plain triangle selector also needed an additional inverse matrix application, but now works as the octree case. Test cases also added.

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Add another remove method which takes a node instead of a key. This can save a second lookup upon removal. Thanks to teto for the idea.

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Fix Meshbuffer interface of md3 files. At least for some situations these should return the proper buffers now, and hence allow for stencil shadows and other things. We might need an animation update check, though, to handle multiple meshes.

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Window size fix by Auria. For now we simply check for any error during window creation and bail out safely. This avoids uncontrolled crashes of the app and may be handled by the app logic somehow.
Reordered some of the device attributes and ensured initialization of all values.

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Add debug data switch for shadow scene nodes. With EDS_SKELETON and EDS_MESH_WIRE_OVERLAY one can draw the whole shadow volume (or just the wireframe of it) instead of just the shadow. Currently only implemented in the hw drivers.
Also fixed a somewhat slow way of not writing to color planes from alphablend(1,0) to proper colormask settings in d3d driver.

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Enable file open dialog to restore initial path after close and add another parameter for optional start directory.

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Add a helper typedef to make it easier to query for the underlying character type. Naming is conforming to stl

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Add new methods for adding and removing file archives based on ifilearchive pointers. The existing methods are also enhanced by an optional return value of the newly added archive. Addition suggested and coded by Nalin.

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Change API of IVideoDriver drawStencilShadowVolume method to take an array of vectors instead of just the pointer and the number of vertices. We have this information anyway, so make us of it.

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Unify two shadow volume methods. Add support for adjacency also for zpass, which makes this method much faster. Proper light scaling and capping still needs to be worked on.

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Unify method interfaces for volume generation. Remove some checks which could make the shadow volume generate wrong results.

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Some changes towards the new shadow algos. Not yet fully changed, only adapted some interface changes and local improvements.

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Fix CBillboardTextSceneNode::OnAnimate to call base-class OnAnimate again (thanks at Erelas for bugreport+testcase).


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All gui-elements now use "SColor" instead of "const SColor&" to unify interfaces somewhat (it doesn't really matter which way it's done - the only bad solution is doing it different in every second function). I don't dare changing the one occurrence of "const SColor&" in IGUISkin as skins are so often overloaded and so changing that would break too much user-code, will do that once IGUISkin is more seriously reworked. Sorry for anyone already overloading gui-elements IGUIEditBox, IGUIListBox, IGUIStaticText - you will have to change that as well. But I think in the long run it's better having this at least a little less inconsistent. 

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Messed up last check-in somewhat. Now all getColor functions in statictext avoid const& (which is OK as SColor is just a long).

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Add getBackgroundColor, isDrawBackgroundEnabled and isDrawBorderEnabled to IGUIStaticText (thx 4 patch from Nalin).

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