3rd person camera help[solved]

[trollger]

OK,I'm creating a 3rd person camera for my game.
I,m using OpenGL and the gcc compiler.
I'm also using code::blocks.
I have in my main loop:

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cam->setTarget(mainChar->getPosition() + vector3df(0,-.1,0));
cam->setPosition(mainChar->getPosition() + vector3df(50,20,20));

but when he rotates my camera doesn't rotate around him.
How do I rotate around my model?

[terier]

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cam->setPosition(mainChar->getPosition() + vector3df(50,20,20));

You certainly can't, if you set camera's absolute position each frame
short question - short answer

[trollger]

what do you mean?
I asked how to revolve around my model.
to do that I need to rotate around certain point.

[nathanf534]

instead of

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cam->setPosition(mainChar->getPosition() + vector3df(50,20,20));

try

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matrix4 mat;
mat.setRotationDegrees(mainChar->getRotation());
vector3df offset = vector3df(50,20,20);
mat.rotateVector(offset);
cam->setPosition(mainChar->getPosition() +offset);

[trollger]

thanks. it worked.