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AppGameKit Classic Chat / is there a maximum velocity?

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CJB
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Joined: 10th Feb 2004
Location: Essex, UK
Posted: 27th Aug 2012 01:02
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Is there a maximum velocity in physics controlled sprites? It appears that I cannot get a sprite to follow my mouse, regardless of how much MaxForce I give it, or what StepPhysics settings I use. It always drags along behind like it is moving through treacle.

More info:

I'm using CreateMouseJoint, and SetJointMouseTarget to move the sprite (shouldn't it be SetMouseJointTarget???)

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Paul Johnston
TGC Developer
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Joined: 16th Nov 2002
Location: United Kingdom
Posted: 27th Aug 2012 01:40
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There is a maximum velocity in Box2D of 2 meters per time step (or 120 meters per second at 60fps). You can adjust the simulation size with SetPhysicsScale so that your screen size is an appropriate number of meters. For example the default scale is 0.2, so a resolution of 1024x768 makes the screen 205x154 meters in size, which is quite significant.
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Ancient Lady
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Location: Anchorage, Alaska, USA
Posted: 27th Aug 2012 05:01
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It would also help to see the code you are using, like are you using Percentage or Virtual space? How are you setting up your physics?

Cheers,
Ancient Lady
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Cliff Mellangard 3DEGS
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Location: Sweden
Posted: 27th Aug 2012 20:29
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Paul do i have to set it for every kind of resolution the app could be played in ?
Iam using the percentage system for my game.

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baxslash
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Location: Duffield
Posted: 27th Aug 2012 21:38
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If you use the percentage system it should be consistent, also if you have a hard coded virtual resolution.


this.mess = abs(sin(times#))
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