Need help swapping the Y axis with the Z axis.

[windows_x_seven]

Hello there!

I'd like to request help on swapping the Y axis with the Z axis (Z as height).

I can't stand using Y as height, since I've been using Z for most of my coding now, it really bothers me to set something to the Y axis and then find it going up or down instead of sideways and then have to recompile with the vectors swapped.

Do I need to modify the engine itself or is there another way?

Thanks for the assistance.

[devsh]

if you want to use right handed coordinate system its easy.

You just need to patch all of the cameras+CMatrix class to swap Y with Z.

Also make sure to change backface culling to front-face or change the order of triangle indices in all meshes.

[CuteAlien]

You can set the up-vector of your camera to 0,0,1. Be aware as long as you don't change to right handed coordinate system (which I wouldn't recommend really...) it means y is coming towards you now (or x to the left).

[windows_x_seven]

You can set the up-vector of your camera to 0,0,1. Be aware as long as you don't change to right handed coordinate system (which I wouldn't recommend really...) it means y is coming towards you now (or x to the left).

I'm currently using the FPS camera, and this produces a really weird movement when moving the mouse: the world flips midway when moving the mouse up or down, and moving it left or right makes a spiral-like motion (right spirals down, left spirals up).

The only code involving the camera is this:

Code: Select all

SKeyMap keyMap[4];
    keyMap[0].Action=EKA_MOVE_FORWARD;   keyMap[0].KeyCode=KEY_KEY_W;
    keyMap[1].Action=EKA_MOVE_BACKWARD;  keyMap[1].KeyCode=KEY_KEY_S;
    keyMap[2].Action=EKA_STRAFE_LEFT;    keyMap[2].KeyCode=KEY_KEY_A;
    keyMap[3].Action=EKA_STRAFE_RIGHT;   keyMap[3].KeyCode=KEY_KEY_D;
 
    ICameraSceneNode* camnode = smgr->addCameraSceneNodeFPS(0, 50, 0.7, -1, keyMap, 4, false, 3);
 
    camnode->setUpVector(core::vector3df(0, 0, 1));

[CuteAlien]

I got an idea why, but will have to check. But yeah, could be some stuff does not work then as expected - Irrlicht really is coded to have Y up.

[CuteAlien]

Sorry, it won't work with FPS-Camera. You will have to write your own for that. Going against the defaults of a library is always hard...

[windows_x_seven]

Sorry, it won't work with FPS-Camera. You will have to write your own for that. Going against the defaults of a library is always hard...

Ok, thanks for the help!