ralph moving help

Scripting Issues
1

well, i just copied this code from the roaming ralph tut.

        backward = smi.getNetTransform().getMat().getRow3(1)
        backward.setZ(0)
        backward.normalize()
        smi.setPos(smi.getPos() - (backward/3))

but i’d like to know how it works.
can anyone explain how it works or direct me to a page in the manual where it is explained?

thanks in advance,

assainator

2

That code is weird. The Roaming Ralph sample will be updated to contain better code in the upcoming 1.6.0 release of Panda.
This is more or less the better equivalent:

        smi.setY(smi, globalClock.getDt() * speed)

Where speed is how much units smi should move relative to it’s own coordinate system.

3

that’s right, the code out of the example is:

        if (self.keyMap["left"]!=0):
            self.ralph.setH(self.ralph.getH() + elapsed*300)
        if (self.keyMap["right"]!=0):
            self.ralph.setH(self.ralph.getH() - elapsed*300)
        if (self.keyMap["forward"]!=0):
            backward = self.ralph.getNetTransform().getMat().getRow3(1)
            backward.setZ(0)
            backward.normalize()
            self.ralph.setPos(self.ralph.getPos() - backward*(elapsed*5))

but i addapted it to my needs (wich are less)

assainator