Gravity, intertial movements? possible?

micron · 21 Feb 2007

i have made something of similar with scope sdk. The inertial movement can be done by using envelopes and if we want to apply the inertial behavior just with faster movements, i think it can be done by using some math + logical circuit, for example a math module that calculates the difference value between before and after moving the fader and a logical module that if value > than x will connect the fader to the envelope by using a switch.

Cheers

Micron

angstrom · 21 Feb 2007

In short the way I would do this, take samples of the mouse x and y during drag - on release compare the current mouse coords with the ones from a moment ago during drag. This will give you some values such as xoffset = -0.234 , yoffset = +0.01.

on a loop apply these to the dragged object, subtracting a percentage of the value each loop.

EG xoffset = currentmouseX-dragmouseX;

loop { xoffset -= xoffset/10; // friction spritex += xoffset; // movement }

that is pseudo code btw, dont try putting it anywhere in SM!

Dj-Grobe · 21 Feb 2007

f somebody can make some working template, thatt can be very usefull : )

Im not are lazy, lol just broken my head and cant figure how do it.

Dj-Grobe · 26 Mar 2007

sombody ? cna? i trying lol and never i do work jajaa. Its really cmplex have boucning ball, and make interaction with gravitational + friction + intertial + mouse !! : )

unkargherth · 27 Mar 2007

Inertia shouldn't be too difficult ( dificult part isn't to calculate it, but to animate it), but bouncing could be very complex. We should take into account, speed, aceleration, edge absortion ( it's the absortion constant or position dependant?) and a big list of other quetions

Anyway way, calculate it it's always simpler than drawing it, provided the variables a clearly (and i mean clearly in mathematical sense) defined

angstrom · 27 Mar 2007

very, very, simple bounce

http://www.timeshard.com/dev/bounce.osm

no gravity, friction or materials. Just you plain old fashioned 'flash tutorial' bouncing ball.

It just bounces around the parent gui.

Dj-Grobe · 28 Mar 2007

Yes, thankyou i already make boucne, the troublke its when you want nteraction with mouse, for drag the ball bouncingm, and whens top drag ball continue bouncing, for change speed of bounce, add some like gravity etc etc

: ) make ball bounce its really easy

Anyway thanks for your example, if you figure how can intercact with mouse, tellme please : )

Or more ocmplex, have multiballs bouncing, and boouncing all, with the walls, of the pad, and boucne when touch other balls, etc et 🙂

really cmplex.........i know jajaja

angstrom · 28 Mar 2007

to interact with the mouse firstly I would do the translation in pixels rather than grid squares.

secondly from the mouse action take the drag(x,y) points and store them, now you drag and release, take those release points (x,y) subtract them from the previous dragged (x,y) like this:

x=20 (release point) - x=10 (previous point) = 10

thats a shift of 10 'x' pixels. That is the number that you want your X counter to be counting. Thats how you get your 'xspeed' variable.

after release start the counter incrementing in chunks of 10 pixels.

repeat this process for y to get 'yspeed' and you will have a ball that you can throw around the frame, it will go at the speed you throw it in 'zero gravity'.

hopefully this gives you the idea.

gravity is simply applied to the yspeed , EG: yspeed=yspeed+gravityconstant

inertia or friction is a subtraction from the 'xspeed' or 'yspeed' variables

Dj-Grobe · 28 Mar 2007

http://www.sumo.tv/video/1287504 Nice experimental things like this be possible : )

Well i try traduce your math to synthmaker. 😝 jijiji

Dj-Grobe · 19 Apr 2007

Ups yep that adress not work here some nice videos:

http://www.youtube.com/watch?v=18T8Oij3XlQ

http://www.youtube.com/watch?v=Gi46ZDY15gg