Here's the 6DOF camera code from the forums. I've moved the variable declarations/functions around to make it compile, and changed the values shown on the screen slightly to display mouseaxis results.

Watch the figures returned by mouseaxis and tell me if it consistently reflects what you're doing with the mouse. If it does, you're getting different results to me. I get numbers sometimes, 0 other times (when I should be getting mouse movement values). Compare the difference if you use the mouseaxis near the top of the main routine against using the mouseaxis calls right before showscreen command. They SHOULD behave the same but they don't and therefore it's a bug as where it's called from in relation to X_MAKE3D, X_MAKE2D and SHOWSCREEN, should not impact the values returned!

Use the mouse buttons and see if it always changes the camera rotation like it should - it's inconsistent for me. (Note that the original code divided the mouseaxis returned values by 10, I took that out to really show when it was and wasn't working.)

Prove me wrong that MOUSEAXIS ISN'T broken!

// --------------------------------- //

// Project: 6DOFCam_lib

// Start: Thursday, November 19, 2009

// IDE Version: 7.177

//

CONSTANT rad = 3.1415926535/180

TYPE Tquaternion

w#

x#

y#

z#

ENDTYPE

TYPE Tcamera

//position

x#

y#

z#

//look vector

lx#

ly#

lz#

//up vector

ux#

uy#

uz#

//right vector

rx#

ry#

rz#

FOV#

aspect#

nearClip#

farClip#

ENDTYPE

LOCAL cam1 AS Tcamera

LOCAL speed# = .01

LOCAL xv#, yv#, zv#, p#=0, r#=0, y#=0

LOCAL mx%, my%, mw%, mba%, mbb%

// --------------------------------- //

// Project: 6DOFCam_test

// Start: Thursday, November 19, 2009

// IDE Version: 7.177

cam1.x# = 0

cam1.y = 0

cam1.z = 0

cam1.lx = 0

cam1.ly = 0

cam1.lz = -1

cam1.ux# = 0

cam1.uy# = 1

cam1.uz# = 0

cam1.rx = 1

cam1.ry = 0

cam1.rz = 0

cam1.FOV = 45

cam1.aspect = 1024/768

cam1.nearClip = .01

cam1.farClip = 5000

WHILE TRUE

MOUSESTATE mx, my, mba, mbb

mx = MOUSEAXIS(0)

my = -MOUSEAXIS(1)

X_6DOFCAMERA(cam1)

//Linear Velocity Dampening (SPACE)

IF KEY(57)

xv = xv * .95

yv = yv * .95

zv = zv * .95

ENDIF

//Angular Velocity Dampening (CTRL)

IF KEY(29)

r = r * .95

p = p * .95

y = y * .95

ENDIF

//Accelerate Forward (W)

IF KEY(17)

xv = xv + (cam1.lx - cam1.x) * speed

yv = yv + (cam1.ly - cam1.y) * speed

zv = zv + (cam1.lz - cam1.z) * speed

ENDIF

//Accelerate Backward (S)

IF KEY(31)

xv = xv - (cam1.lx - cam1.x) * speed

yv = yv - (cam1.ly - cam1.y) * speed

zv = zv - (cam1.lz - cam1.z) * speed

ENDIF

//Accelerate Left (A)

IF KEY(30)

xv = xv + (cam1.rx - cam1.x) * speed

yv = yv + (cam1.ry - cam1.y) * speed

zv = zv + (cam1.rz - cam1.z) * speed

ENDIF

//Accelerate Right (D)

IF KEY(32)

xv = xv - (cam1.rx - cam1.x) * speed

yv = yv - (cam1.ry - cam1.y) * speed

zv = zv - (cam1.rz - cam1.z) * speed

ENDIF

//Accelerate Down (F)

IF KEY(33)

xv = xv + (cam1.ux - cam1.x) * speed

yv = yv + (cam1.uy - cam1.y) * speed

zv = zv + (cam1.uz - cam1.z) * speed

ENDIF

//Accelerate Up (R)

IF KEY(19)

xv = xv - (cam1.ux - cam1.x) * speed

yv = yv - (cam1.uy - cam1.y) * speed

zv = zv - (cam1.uz - cam1.z) * speed

ENDIF

// change IF the left mouse button is pressed

IF mba = 1

//Pitch mouse up AND

p = p + my

//Yaw

y = y + mx

ELSEIF mbb = 1

//Roll with right mouse button

r = r + mx

ENDIF

cam1.x = cam1.x + xv

cam1.y = cam1.y + yv

cam1.z = cam1.z + zv

cam1.lx = cam1.lx + xv

cam1.ly = cam1.ly + yv

cam1.lz = cam1.lz + zv

cam1.rx = cam1.rx + xv

cam1.ry = cam1.ry + yv

cam1.rz = cam1.rz + zv

cam1.ux = cam1.ux + xv

cam1.uy = cam1.uy + yv

cam1.uz = cam1.uz + zv

debug_view(0,0,0,100,RGB(255,255,0),RGB(255,0,255),RGB(0,255,255))

camera_roll(cam1,r)

camera_pitch(cam1,p)

camera_yaw(cam1,y)

X_MAKE2D

PRINT "mx = "+mx,10,90

PRINT "my = "+my,10,100

PRINT "Cam Pitch = "+p,10,110

PRINT "Cam Yaw = "+y,10,120

PRINT "Cam Roll = "+r,10,130

// mx = MOUSEAXIS(0)

// my = -MOUSEAXIS(1)

SHOWSCREEN

WEND

FUNCTION quaternion_normalize AS Tquaternion: tmpQ AS Tquaternion

LOCAL mag# = SQR(tmpQ.w*tmpQ.w+tmpQ.x*tmpQ.x+tmpQ.y*tmpQ.y+tmpQ.z*tmpQ.z)

LOCAL q AS Tquaternion

q.w = tmpQ.w / mag

q.x = tmpQ.x / mag

q.y = tmpQ.y / mag

q.z = tmpQ.z / mag

RETURN q

ENDFUNCTION

FUNCTION quaternion_conj AS Tquaternion: tmpQ AS Tquaternion

LOCAL q AS Tquaternion

q.w = -tmpQ.w

q.x = -tmpQ.x

q.y = -tmpQ.y

q.z = -tmpQ.z

RETURN q

ENDFUNCTION

FUNCTION quaternion_mult AS Tquaternion: lhs AS Tquaternion, rhs AS Tquaternion

LOCAL q AS Tquaternion

q.w = lhs.w * rhs.w - lhs.x * rhs.x - lhs.y * rhs.y - lhs.z * rhs.z

q.x = lhs.w * rhs.x + lhs.x * rhs.w + lhs.y * rhs.z - lhs.z * rhs.y

q.y = lhs.w * rhs.y - lhs.x * rhs.z + lhs.y * rhs.w + lhs.z * rhs.x

q.z = lhs.w * rhs.z + lhs.x * rhs.y - lhs.y * rhs.x + lhs.z * rhs.w

RETURN q

ENDFUNCTION

FUNCTION camera_advance: cam AS Tcamera, d#

LOCAL xt#, yt#, zt#

xt = (cam.lx - cam.x) * d

yt = (cam.ly - cam.y) * d

zt = (cam.lz - cam.z) * d

cam.x = cam.x + xt

cam.y = cam.y + yt

cam.z = cam.z + zt

cam.ux =cam.ux + xt

cam.uy =cam.uy + yt

cam.uz =cam.uz + zt

cam.rx =cam.rx + xt

cam.ry =cam.ry + yt

cam.rz =cam.rz + zt

cam.lx =cam.lx + xt

cam.ly =cam.ly + yt

cam.lz =cam.lz + zt

ENDFUNCTION

FUNCTION camera_strafe: cam AS Tcamera, d#

LOCAL xt#, yt#, zt#

xt = (cam.rx - cam.x) * d

yt = (cam.ry - cam.y) * d

zt = (cam.rz - cam.z) * d

cam.x = cam.x + xt

cam.y = cam.y + yt

cam.z = cam.z + zt

cam.ux = cam.ux + xt

cam.uy = cam.uy + yt

cam.uz = cam.uz + zt

cam.rx = cam.rx + xt

cam.ry = cam.ry + yt

cam.rz = cam.rz + zt

cam.lx = cam.lx + xt

cam.ly = cam.ly + yt

cam.lz = cam.lz + zt

ENDFUNCTION

FUNCTION camera_rise: cam AS Tcamera, d#

LOCAL xt#, yt#, zt#

xt = (cam.ux - cam.x) * d

yt = (cam.uy - cam.y) * d

zt = (cam.uz - cam.z) * d

cam.x = cam.x + xt

cam.y = cam.y + yt

cam.z = cam.z + zt

cam.ux = cam.ux + xt

cam.uy = cam.uy + yt

cam.uz = cam.uz + zt

cam.rx = cam.rx + xt

cam.ry = cam.ry + yt

cam.rz = cam.rz + zt

cam.lx = cam.lx + xt

cam.ly = cam.ly + yt

cam.lz = cam.lz + zt

ENDFUNCTION

FUNCTION camera_roll: cam AS Tcamera, a#

LOCAL qUp AS Tquaternion

qUp.w = 0

qUp.x = cam.ux - cam.x

qUp.y = cam.uy - cam.y

qUp.z = cam.uz - cam.z

LOCAL qRight AS Tquaternion

qRight.w = 0

qRight.x = cam.rx - cam.x

qRight.y = cam.ry - cam.y

qRight.z = cam.rz - cam.z

LOCAL qRot AS Tquaternion

qRot.w = COS(a * rad/2)

qRot.x = (cam.lx - cam.x) * SIN(a * rad/2)

qRot.y = (cam.ly - cam.y) * SIN(a * rad/2)

qRot.z = (cam.lz - cam.z) * SIN(a * rad/2)

LOCAL W AS Tquaternion,W1 AS Tquaternion,W2 AS Tquaternion

W1 = quaternion_mult(qRot,qUp)

W2 = quaternion_conj(qRot)

W = quaternion_mult(W2,W1)

W = quaternion_normalize(W)

cam.ux = W.x + cam.x

cam.uy = W.y + cam.y

cam.uz = W.z + cam.z

// W = quaternion_mult(quaternion_mult(qRot,qRight), quaternion_conj(qRot)) <<< This does not work?!?!

W1 = quaternion_mult(qRot,qRight)

W2 = quaternion_conj(qRot)

W = quaternion_mult(W2,W1)

W = quaternion_normalize(W)

cam.rx = W.x + cam.x

cam.ry = W.y + cam.y

cam.rz = W.z + cam.z

ENDFUNCTION

FUNCTION camera_pitch: cam AS Tcamera, a#

LOCAL qUp AS Tquaternion

qUp.w = 0

qUp.x = cam.ux - cam.x

qUp.y = cam.uy - cam.y

qUp.z = cam.uz - cam.z

LOCAL qLook AS Tquaternion

qLook.w = 0

qLook.x = cam.lx - cam.x

qLook.y = cam.ly - cam.y

qLook.z = cam.lz - cam.z

LOCAL qRot AS Tquaternion

qRot.w = COS(a * rad/2)

qRot.x = (cam.rx - cam.x) * SIN(a * rad/2)

qRot.y = (cam.ry - cam.y) * SIN(a * rad/2)

qRot.z = (cam.rz - cam.z) * SIN(a * rad/2)

LOCAL W AS Tquaternion,W1 AS Tquaternion,W2 AS Tquaternion

W1 = quaternion_mult(qRot,qUp)

W2 = quaternion_conj(qRot)

W = quaternion_mult(W2,W1)

W = quaternion_normalize(W)

cam.ux = W.x + cam.x

cam.uy = W.y + cam.y

cam.uz = W.z + cam.z

W1 = quaternion_mult(qRot,qLook)

W2 = quaternion_conj(qRot)

W = quaternion_mult(W2,W1)

W = quaternion_normalize(W)

cam.lx = W.x + cam.x

cam.ly = W.y + cam.y

cam.lz = W.z + cam.z

ENDFUNCTION

FUNCTION camera_yaw: cam AS Tcamera, a#

LOCAL qRight AS Tquaternion

qRight.w = 0

qRight.x = cam.rx - cam.x

qRight.y = cam.ry - cam.y

qRight.z = cam.rz - cam.z

LOCAL qLook AS Tquaternion

qLook.w = 0

qLook.x = cam.lx - cam.x

qLook.y = cam.ly - cam.y

qLook.z = cam.lz - cam.z

LOCAL qRot AS Tquaternion

qRot.w = COS(a * rad/2)

qRot.x = (cam.ux - cam.x) * SIN(a * rad/2)

qRot.y = (cam.uy - cam.y) * SIN(a * rad/2)

qRot.z = (cam.uz - cam.z) * SIN(a * rad/2)

LOCAL W AS Tquaternion,W1 AS Tquaternion,W2 AS Tquaternion

W1 = quaternion_mult(qRot,qRight)

W2 = quaternion_conj(qRot)

W = quaternion_mult(W2,W1)

W = quaternion_normalize(W)

cam.rx = W.x + cam.x

cam.ry = W.y + cam.y

cam.rz = W.z + cam.z

W1 = quaternion_mult(qRot,qLook)

W2 = quaternion_conj(qRot)

W = quaternion_mult(W2,W1)

W = quaternion_normalize(W)

cam.lx = W.x + cam.x

cam.ly = W.y + cam.y

cam.lz = W.z + cam.z

ENDFUNCTION

FUNCTION X_6DOFCAMERA: cam AS Tcamera

X_MAKE3D cam.nearClip, cam.farClip, cam.FOV

X_CAMERAUP cam.x - cam.ux, cam.y - cam.uy, cam.z - cam.uz

X_CAMERA cam.x, cam.y, cam.z, cam.lx, cam.ly, cam.lz

ENDFUNCTION

FUNCTION debug_view: x, y, z, crad, rgb1, rgb2, rgb3

LOCAL rad, x1, y1, j, x2, y2

y1=SIN(0)*crad

x1=COS(0)*crad

FOR j=4 TO 360 STEP 4

y2=SIN(j)*crad

x2=COS(j)*crad

X_LINE x+x1,y+y1,z , x+x2,y+y2,z,0.1,rgb1

X_LINE x+x1,y+0,y1+z, x+x2,y+0,y2+z,1,rgb2

X_LINE x+0,y+x1,y1+z, x+0,y+x2,y2+z,1,rgb3

x1=x2

y1=y2

NEXT

X_DOT x,y,z,10,rgb1

X_DRAWAXES x+crad,y,z

X_DRAWAXES x-crad,y,z

X_DRAWAXES x,y+crad,z

X_DRAWAXES x,y-crad,z

X_DRAWAXES x,y,crad+z

X_DRAWAXES x,y,-crad+z

X_PRINT "RIGHT X+",x+crad,y,z,0

X_PRINT "LEFT X-",x-crad,y,z,0

X_PRINT "UP Y+",x,y+crad,z,0

X_PRINT "DOWN Y-",x,y-crad,z,0

X_PRINT "OUT Z+",x,y,crad+z,0

X_PRINT "IN Z-",x,y,-crad+z,0

X_SETTEXTURE -1, -1

ENDFUNCTION