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Change from dimension2d<s32> to dimension2d<u32> where practical.  IImage and ITexture now have unsigned dimensions, as does screen size.  This has had a significant knock-on through the code base, but it is more technically correct - the BEST KIND of correct.

GUI elements and draw2DImage methods still have and take signed dimensions, but we can look into this in future. Regression tested with the test suite and the example apps.  Note that createDevice() now takes dimension2d<u32>!

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Avoid the XVisual method when using OpenGL, because it selects improper visuals. Better signal a fail in order for the user to try other properties.

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Merged revisions 2072:2087 from 1.5 branch. Some missing inits fixed, OpenGL FBO fails better recognizeable, docs updated.

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Change IVideoDriver::writeImageToFile() to always use the IWriteFile filename rather than taking a separate extension.

Test updated.

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Add IFileSystem::createMemoryWriteFile() to allow writing to memory.
Replace CMemoryReadFile with CMemoryFile that also implement IWriteFile.
Add an IVideoDriver::writeImageToFile() overload that takes an IWriteFile.
This allows writing (e.g.) screenshots to memory, rather than directly to file.

New unit test added to test the new functionality.  Tested on Windows with VS2005 and C::B. I'll do Linux ASAP.

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Remove unused member from FPS cam.

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Merged from 1.5 branch to trunk, all changes from 2042 to 2071. cursor setVisible fix, OSX FPS cam fix, ALPHA_CHANNEL_REF fix, new method draw2dRectOutline, setOverrideFont fixes, getCollisisonPoint distance bug fix.

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Add example 20 to C::B and VC7/VC9 projects.  Fix some build issues with the light manager and example.

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Adding an optional light manager that allows hardware lights to be turned on and off before each scene node is rendered. This can be used to produce "zoned" lighting.

If a light manager is not registered, the existing behaviour (activate the closest lights to the camera) will be retained unchanged.  New example project added to demonstrate the usage, and regression tests and existing samples run.  No regression test for the light manager yet, since I am more interested in not regressing the default behaviour.

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Have all public ISceneCollisionManager.h methods take 'const type &' rather than 'type' where appropriate.

Conversely, have CSceneManager::getPickedNodeBB() take a non-const 'core::line3df& ray', so that child nodes can truncate the master ray when they get a collision.

This is an API change, so goes to the trunk only.

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Last fix to CSceneCollisionManager::getPickedNodeBB(). ;)  Efficiency improvements to reduce the number of checks, since we can only hit one face of each box, and we needn't consider boxes that are further away than the closest hit.

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Another fix to CSceneCollisionManager::getPickedNodeBB(). Ensure that the collision point with the plane of a box is actually on the box surface rather than outside it.  Retested with regression test and example 07.

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Change ray/bounding box selection so that the nearest node is determined by the actual collision point with the bounding box (or the distance to the box centre if the ray starts inside the box).  Since this is a functional change from the old behaviour, I'm only committing to the trunk.  This will be slightly slower than the old method, but should return the correct node; I consider accuracy to take priority over efficiency for collision.

tests/sceneCollisionManager.cpp has been updated, as has examples/07.Collision/main.cpp.

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Merged from 1.5 branch to trunk, all changes from 2018 to 2041. OSX keyboard fix, OpenGL version fix, some tests fixed. Example 9 text position fixed.

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Update trunk tests: add textureRenderStates.cpp to tests_vc8.proj and tests.cbp; fix reversed logic in irrCoreEqual.cpp (the test wasn't being run); re-base the trunk tests/main.cpp on 1.5 tests/main.cpp, with the addition of those tests only available on the trunk.

Tested on Windows with MSVC 2005 and Code::Blocks, with a local trunk re-application of the terrainSceneNode.cpp change in SVN 2039 (which will get merged down separately).  I'll re-test on Linux as soon as I've committed this.

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Made the Anisotropic Filter degree configurable via the SMaterialLayer member which had been a bool formerly. Using the setFlag in SMaterial should still give MaxAnisotropy level as before.

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Hmm, didn't save the last files before committing. So this is the actual test cases which runs through.

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Added orthogonality check in matrix class, based on a patch by Halifax. Also added some (rather trivial) testcases, corner cases have to be identified...

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