Fixed bug with Maya cam animator absorbing all wheel events (1983850)

OpenGL render target flip now works with texture clamping (assuming tcoords are 0.0 to 1.0)
Quick fix for crash when removing old hardware buffers.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1366 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CNullDriver.cpp

@@ -1277,6 +1277,9 @@ void CNullDriver::updateAllHardwareBuffers()
 		if (Link->LastUsed>20000)
 		{
 			deleteHardwareBuffer(Link);
+
+			// todo: needs better fix
+			Iterator = HWBufferMap.getParentFirstIterator();
 		}
 	}
 }

source/Irrlicht/COpenGLDriver.cpp

@@ -348,6 +348,9 @@ bool COpenGLDriver::genericDriverInit(const core::dimension2d<s32>& screenSize,
 	// set fog mode
 	setFog(FogColor, LinearFog, FogStart, FogEnd, FogDensity, PixelFog, RangeFog);
 
+	// create matrix for flipping textures
+	TextureFlipMatrix.buildTextureTransform(0.0f, core::vector2df(0,0), core::vector2df(0,1.0f), core::vector2df(1.0f,-1.0f));
+
 	return true;
 }
 
@@ -509,9 +512,11 @@ void COpenGLDriver::setTransform(E_TRANSFORMATION_STATE state, const core::matri
 			glLoadIdentity();
 		else
 		{
-			createGLTextureMatrix(glmat, mat);
 			if (isRTT)
-				glmat[5] *= -1.0f;
+				createGLTextureMatrix(glmat, mat * TextureFlipMatrix);
+			else
+				createGLTextureMatrix(glmat, mat);
+
 			glLoadMatrixf(glmat);
 		}
 		break;

source/Irrlicht/COpenGLDriver.h

@@ -389,6 +389,8 @@ namespace video
 
 		core::stringc vendorName;
 
+		core::matrix4 TextureFlipMatrix;
+
 		#ifdef _IRR_WINDOWS_API_
 			HDC HDc; // Private GDI Device Context
 			HWND Window;

source/Irrlicht/CSceneNodeAnimatorCameraMaya.cpp

@@ -73,7 +73,7 @@ bool CSceneNodeAnimatorCameraMaya::OnEvent(const SEvent& event)
 		break;
 	case EMIE_MOUSE_WHEEL:
 	case EMIE_COUNT:
-		break;
+		return false;
 	}
 	return true;
 }