NULL Driver. Transformation problem [solved]

[mmortall]

I am writing my own render using NULL driver and I got strange issue.

For set up transformation I use code:

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m_irrnode->updateAbsolutePosition();
glMultMatrixf(m_irrnode->getAbsoluteTransformation().pointer());
 

After this I find that transformation of all objects become like mirror. Looks like some problem with coordinate system.
But when I use pure Irrlicht with OpenGL Driver and set transformation using setPosition, setRotation etc. all is right.

As I see in the code Irrlicht use the same world matrix for DirectX and OpenGL device, but its have different coordinate systems. How Irrlicht solve this problem?

[mmortall]

I fix it.
I convert View matrix to left-hand system and change back face culling direction.
So I change

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gluLookAt(pos.X, pos.Y, pos.Z, target.X, target.Y, target.Z, up.X, up.Y, up.Z);
 
glFrontFace(GL_CCW);
 

to

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gluLookAt(pos.X, pos.Y, pos.Z, target.X, target.Y, target.Z, up.X, up.Y, up.Z);
glScalef(1.0f, 1.0f, -1.0f);
 
glFrontFace(GL_CW);
 

[hybrid]

What's the purpose of yet another OpenGL driver?

[mmortall]

What's the purpose of yet another OpenGL driver?

I write modern and much faster driver. 30 000 triangles in scene is limit of Irrlicht OpenGL driver (render in ~10 ms).
Pure OpenGL with VBO draw over 1 000 000 triangles in 1.5 ms.
Also driver will be shader-based.

[hybrid]

You can easily get a VBO based mesh rendering already now in Irrlicht. And we also have a shader based (opengl-es 2.x) driver in the opengl-es branch. Just to note that not every wheel needs to be re-invented...