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OpenGL render targets are now the same way up as in the other drivers. When setting the projection matrix of a render target, the Y axis is flipped and polygon winding is switched to counter-clockwise.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@787 dfc29bdd-3216-0410-991c-e03cc46cb475

Changed OpenGL default Renderstate to ALPHA_TEST being disabled. Some indentation changes in other files.

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Exposed findTexture in IVideoDriver to check if a texture was already loaded.
Reordered some more OpenGL render state settings in the materials.

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Fixed scene node deserialization which was completely broken since several revisions due to newly added attributes.

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fixed getOriginalSize in textures in Burning's renderer. Had to add a new method to get the size of the largest mipmap (getMaxSize), as the texelarea functions needed this value.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@769 dfc29bdd-3216-0410-991c-e03cc46cb475

fixed a bug I caused in CGUIMenu and CGUIContextMenu. added some more window symbols to the built-in font and the skin.

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Changed addArrowMesh parameter order. Changed OBJ loader to use stringc instead of dynamically allocated char array.

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Added navigation through the GUI using tab and the shift and control keys. Added keyboard navigation for most elements. Fixed that annoying bug where you had to click twice to change focus.
Added IGUIElement::isMyChild, isPointInside,  SEvent.GUIEvent.Element. 
Changed setFocus and removeFocus to return bools.
changed quaternion::toAngleAxis to use iszero. 

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added IUnknown::getReferenceCount and IMeshCache::clearUnusedMeshes to flush unused meshes from the mesh cache.
Fixed CGUIModalScreen, which I broke with the IGUIElement changes. Also fixed a small bug with the tooltip appearing directly under the mouse cursor.

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added a black border around the icons in builtInFont.h, added the source bitmap. changed the way completely background transparency is handled in the bitmap font loader, the colour data for background is not kept.
changed default icon highlight value in the skin so the icons are highlighted in the same way as the text.

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Added two currently disabled OpenGL improvements for shadow volumes. Due to incompatible shadow volumes the extensions are not yet working.

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changed behaviour of IGUIElement::OnEvent so it doesn't always absorb events, and added getAbsoluteClippingRect.
fixed tooltip text on file open dialog's close button.
added some managed marshalling bugfix things where I missed them earlier.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@751 dfc29bdd-3216-0410-991c-e03cc46cb475

all devices now log an error message if the video driver is unknown.
fixed serialization of new variables in IGUIEditBox.

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added automatic scrolling when dragging text with mouse

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Added setDrawBorder to IGUIEditBox and IGUIStaticText. 
Added setTextAlignment to GUIEditBox and IGUIStaticText, for text justification and vertical alignment.
IGUIEditbox now supports multiple lines using setWordWrap and setMultiLine.
IGUIElement now calls getter and setter functions when serializing, in case of getter/setter overrides.

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