5 replies to this topic

[DudeGuy676]

I've recently started learning how to program in 3d, and so far I've developed this code for using the mouse to look around

Spoiler

//MOUSELOOK

//calculate motion
change_x=(display_mouse_get_x()-512)/16
change_y=(display_mouse_get_y()-512)/16

//apply treshold
if (change_x<.1)
{
change_x=round(change_x)
}
if (change_y<.1)
{
change_y=round(change_y)
}

//move cam
obj_camera.direction-=change_x
obj_camera.zdirection-=change_y/32

//move mouse back
display_mouse_set(display_mouse_get_x()-change_x*6,display_mouse_get_y()-change_y*6)

the problem is, when I'm getting close to looking straight up, the sensativity of the mouse (or camera) goes down alot. (I'm moving the mouse alot more to get less movement in the camera). Does anyone know how to fix this?

[Gamer3D]

Divide the horizontal rotation by cos(obj_camera.zdirection)

Note: When using this method, never look straight up.

[DudeGuy676]

I tried that and it ended up with very chaotic results. The point of this is to actually be able to look straight up withought the camera spinning out of control.

[Gamer3D]

I tried that and it ended up with very chaotic results. The point of this is to actually be able to look straight up withought the camera spinning out of control.

Ah. Not sensitivity.

You'll want to modify the up vector for the projection.

[DudeGuy676]

Ah. Not sensitivity.

You'll want to modify the up vector for the projection.

could you please elaborate? I tried a number of things and they all failed.

[Gamer3D]

Ah. Not sensitivity.

You'll want to modify the up vector for the projection.

could you please elaborate? I tried a number of things and they all failed.

When the look vector <xto-xfrom,yto-yfrom,zto-zfrom> is parallel to the up vector <xup,yup,zup>, d3d has no means of determining the intended orientation. A simple way (Not the best way, but should work for your purposes) is to change the up vector from <0,0,1> to <cos(direction)*(yfrom-yto),sin(direction)*(yfrom-yto),1>. This will allow the camera to function even when facing straight up or straight down.