Turnshape.cs rotation (chapter 3)
by Matthew W · in Torque Game Engine · 03/10/2008 (8:49 pm) · 2 replies
This code makes an error that i cant understand and i cant find an answer in the past threads.
and, after a while, this happens:
As that command keeps being entered it gets to 2.02 and then jumps back and forth between 4.16319 and 2.02. Well, i just wanted to see the building rotate all the way around; and it did rotate in the same direction for a while before it messes up. What do you think is wrong?
function TurnShape(%shape, %angle) {
echo ("TurnShape: shape id: ", %shape);
echo ("TurnShape: angle: ", %angle);
%xfrm = %shape.getTransform();
%lx = getword(%xfrm, 0);
%ly = getword(%xfrm, 1);
%lz = getWord(%xfrm, 2);
%rx = getword(%xfrm, 3);
%ry = getword(%xfrm, 4);
%rz = getword(%xfrm, 5);
%rd = getword(%xfrm, 6); //i added this line..
echo ("TurnShape: current angle: ", %rd); //..and this line
%rd += %angle; // ..and changed this line.
%shape.setTransform(%lx SPC %ly SPC %lz SPC %rx SPC %ry SPC %rz SPC %rd);
echo ("TurnShape: done.");
}and, after a while, this happens:
As that command keeps being entered it gets to 2.02 and then jumps back and forth between 4.16319 and 2.02. Well, i just wanted to see the building rotate all the way around; and it did rotate in the same direction for a while before it messes up. What do you think is wrong?
#2
They have nothing to do with heading, bank, pitch (that is: elements 3,4,5 aren't Euler angles.)
If the object is always upright, you can use an "axis" part of 0 0 1 (rotating "angle" about the up axis.)
%rx = 0
%ry = 0
%rz = 1
Another issue may be that the angle may be expressed in radians.
03/10/2008 (10:36 pm)
Transform elements 3,4,5 and 6 form an axis angle specification of rotation. They have nothing to do with heading, bank, pitch (that is: elements 3,4,5 aren't Euler angles.)
If the object is always upright, you can use an "axis" part of 0 0 1 (rotating "angle" about the up axis.)
%rx = 0
%ry = 0
%rz = 1
Another issue may be that the angle may be expressed in radians.
Torque Owner Cinder Games
If you're trying to rotate an object, why not add onto the heading,bank, or pitch rotation 3,4,5?
But anyhow, the angle affects all the rotation direction. it's sorta a multiplier of sorts. I don't really understand it, but i know that's not the way to rotate things.