pfuxformerLimits()

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Satish K. Annapuneddy (satish++at++chaos.idec.sdl.usu.edu)
Mon, 30 Jan 1995 18:45:38 -0700 (MST)

Hi,

I am new to performer and I am trying to figure out a few things.
Specifically, I was looking at perfly and the DRIVE mode. In perfly.c,
in the function xformerMode(), for the DRIVE motion model, the limits
are setup using the code:

 /* Limit to ~60mph, 90 degrees/sec pan, .125G acceleration */
        pfuXformerLimits(ViewState->xformer, 30.0f, 90.0f, 1.25f, NULL);

and height above the ground as:

  /* Follow 2 meters above ground */
        if (collideMode == PF_ON)
            pfuXformerCollision(ViewState->xformer, PFUCOLLIDE_GROUND, 2.0f,
                ViewState->scene);
        else
            pfuXformerCollision(ViewState->xformer, PFUCOLLIDE_GROUND, 0.0f,
                NULL);

        /* Collide with objects in scene */
        if (collideMode == PF_ON)
            pfuXformerCollision(ViewState->xformer, PFUCOLLIDE_OBJECT,
                2.0f*ViewState->near, ViewState->scene);
        else
            pfuXformerCollision(ViewState->xformer, PFUCOLLIDE_OBJECT, 0.0f,
                NULL);

        pfuXformerCoord(ViewState->xformer, &ViewState->viewCoord);

Q:
Does that mean that these functions use mph and meters as units for speed
and distance? The man page does not say so.

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