Hi, guys, I want to define some 3D primitive nodes for our graphic engine. Cube Node is one of the basis primitive node in our design. I am wondering, besides two vertex position, is there any other attribution I need to concern, such as axis vector, normal vector, etc. Because the cube is in 3D space, only two points is not enough, we must consider its orientation. But I also need to keep the size of the definition as small as possible. What's your opinion? My draft is class CubeNode { public: float mTopLeft[3]; float mBottomRight[3]; float mXAxisVector[3]; //X Axis Orientation float mYAxisVector[3]; //Y Axis Orientation } Thanks!

It's elegant indeed!
Thank you very much! :)

you can also use:

Cube{   VECTOR3 Axis[3]    //X,Y,Z normalize axis of the cube   VECTOR3 Origin     //Origin of cube in 3D space   float Dimension[3] //Length of the X,Y,Z axis of the cube.}

Quote:Original post by littlekid
you can also use:

Cube{   VECTOR3 Axis[3]    //X,Y,Z normalize axis of the cube   VECTOR3 Origin     //Origin of cube in 3D space   float Dimension[3] //Length of the X,Y,Z axis of the cube.}

in that case you only need the Up and Right vector for the axis