Ураааааа!!! Я не мудак!!! ))
Сам нашел баг в ксорсе, с синусами косинусами
Include "Xors3d.bb"
xGraphics3D 640,480,32,0,1
Global camera=xCreateCamera()
cb=xCreateCube()
xMoveEntity cb,0,1,30
While Not(xKeyHit(1))
msx=xMouseXSpeed()
xMoveMouse 200,200
xRenderWorld(1,0)
xTurnEntity camera,0,-msx*0.11,0
xMoveEntity camera,0,0,(xKeyDown(200)-xKeyDown(208))*0.03
xText 10,20,"xEntityYaw(camera) = "+xEntityYaw(camera)
xText 10,40,"xEntityZ(camera) = "+xEntityZ(camera)
xText 10,60,"Cos(xEntityYaw(camera)) = "+Cos(xEntityYaw(camera))
;NaN
xText 10,100,"xEntityZ(camera) + Cos(xEntityYaw(camera)) = "
xColor 170,120,100 : xText 450,100,(xEntityZ(camera)+Cos(xEntityYaw(camera))) : xColor 255,255,255
;is working properly О_о
a#=xEntityYaw(camera,1)
xText 10,120,"a# = xEntityYaw(camera) : xEntityZ(camera) + Cos(a) = "
xColor 120,190,110 : xText 450,120,(xEntityZ(camera)+Cos(a)) : xColor 255,255,255
xFlip
Wend
End