> Can you be a bit more specific? What do you mean by "apply an offset equal > to -1 times the starting value"? What is it exactly that you want to do?
I want to animate an object, using the scale animation. Say I have a bit of contrail which appears behind the user aircraft. I want that contrail model to grow to about 2 or 3 times its starting size within 8 seconds. I also want it to fade to transparent within 8 seconds, but that's another issue. To do this I need a property that counts to 8 seconds. The only property I know of that does anything like this is "sim/time/elapsed-sec", but its value will be unknown at the time the contrail bit is created, so I can't use this raw value for the animation. Let's say that when a particular bit of contrail is created the elapsed time is 1528.35. If I could apply an offset of -1528.35 to this number, then I would have the elapsed time since the model was created, and I could use it for my animation because I'm now starting from a known value (zero). Dave _______________________________________________ Flightgear-users mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-users 2f585eeea02e2c79d7b1d8c4963bae2d
