Remove some useless dependencies on the camera from the texturing view tools.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Refactor methods to compute texture grid vertices.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Refactoring TexturingViewHelper.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>