Re: [Flashcoders] drag and rotate, where do I begin?
Downloaded, but the code is not quite readable... I'm studying it tho. Thanks for your help. On Thu, Jul 3, 2008 at 4:52 AM, jonathan howe [EMAIL PROTECTED] wrote: I see a link into the place where they got the physics right in the project description: http://www.ffiles.com/flash/physics_and_motion/drag_and_rotation_with_easing_1649.html Have you tried registering and downloading - maybe it contains source? --jonathan On Thu, Jul 3, 2008 at 6:32 AM, Leandro Ferreira [EMAIL PROTECTED] wrote: Sure, drag and throw is not a problem, nor is rotation based on an arbitrary point, but deciding how an object should rotate based on where the user pressed and how he dragged it. But thanks anyway. About ready-made classes: with APE or box2D I could manage to recreate this, but that's not the point: what I want is to understand how it's done. Anyone? Leandro Ferreira On Thu, Jul 3, 2008 at 1:19 AM, Ashim D'Silva [EMAIL PROTECTED] wrote: Basically it's using velocity well. The dragging and throwing is pretty easy to figure out with basic physics (velocity and decay/friction). The rotation is a little trickier I imagine using some sort of Matrix transformations to dynamically decide a point to rotate around. Look for rotations around an arbitratrary point. I don't have enough knowledge to actually help you out directly but hopefully this will lead you in some direction. Maybe there are some ready made classes... Ashim -- Random Lines 3D My online portfolio www.therandomlines.com 2008/7/3 Leandro Ferreira [EMAIL PROTECTED]: Hi there, I was trying to understand how this( http://www.ffiles.com/flash/templates/drag_and_rotate_website_1670.html) kind of movement works, but I have no idea on what to search for. At first I got an physics book about classical mechanics, but didn't find it useful, and can't find the exact theories involved in order to look for and applied use. Then I began working 'intuitively' in it, with some trigonometics and so, but things got ugly and now I'm kind of stuck. Does anyone here know where can I find some information/article/readable source about this? Thanks, Leandro Ferreira ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- Random Lines 3D My online portfolio www.therandomlines.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- -jonathan howe :: 404.434.2321 :: 180 High St Apt 26 Portland, ME 04101 ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] drag and rotate, where do I begin?
I see a link into the place where they got the physics right in the project description: http://www.ffiles.com/flash/physics_and_motion/drag_and_rotation_with_easing_1649.html Have you tried registering and downloading - maybe it contains source? --jonathan On Thu, Jul 3, 2008 at 6:32 AM, Leandro Ferreira [EMAIL PROTECTED] wrote: Sure, drag and throw is not a problem, nor is rotation based on an arbitrary point, but deciding how an object should rotate based on where the user pressed and how he dragged it. But thanks anyway. About ready-made classes: with APE or box2D I could manage to recreate this, but that's not the point: what I want is to understand how it's done. Anyone? Leandro Ferreira On Thu, Jul 3, 2008 at 1:19 AM, Ashim D'Silva [EMAIL PROTECTED] wrote: Basically it's using velocity well. The dragging and throwing is pretty easy to figure out with basic physics (velocity and decay/friction). The rotation is a little trickier I imagine using some sort of Matrix transformations to dynamically decide a point to rotate around. Look for rotations around an arbitratrary point. I don't have enough knowledge to actually help you out directly but hopefully this will lead you in some direction. Maybe there are some ready made classes... Ashim -- Random Lines 3D My online portfolio www.therandomlines.com 2008/7/3 Leandro Ferreira [EMAIL PROTECTED]: Hi there, I was trying to understand how this( http://www.ffiles.com/flash/templates/drag_and_rotate_website_1670.html) kind of movement works, but I have no idea on what to search for. At first I got an physics book about classical mechanics, but didn't find it useful, and can't find the exact theories involved in order to look for and applied use. Then I began working 'intuitively' in it, with some trigonometics and so, but things got ugly and now I'm kind of stuck. Does anyone here know where can I find some information/article/readable source about this? Thanks, Leandro Ferreira ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- Random Lines 3D My online portfolio www.therandomlines.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- -jonathan howe :: 404.434.2321 :: 180 High St Apt 26 Portland, ME 04101 ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] drag and rotate, where do I begin?
Basically it's using velocity well. The dragging and throwing is pretty easy to figure out with basic physics (velocity and decay/friction). The rotation is a little trickier I imagine using some sort of Matrix transformations to dynamically decide a point to rotate around. Look for rotations around an arbitratrary point. I don't have enough knowledge to actually help you out directly but hopefully this will lead you in some direction. Maybe there are some ready made classes... Ashim -- Random Lines 3D My online portfolio www.therandomlines.com 2008/7/3 Leandro Ferreira [EMAIL PROTECTED]: Hi there, I was trying to understand how this( http://www.ffiles.com/flash/templates/drag_and_rotate_website_1670.html ) kind of movement works, but I have no idea on what to search for. At first I got an physics book about classical mechanics, but didn't find it useful, and can't find the exact theories involved in order to look for and applied use. Then I began working 'intuitively' in it, with some trigonometics and so, but things got ugly and now I'm kind of stuck. Does anyone here know where can I find some information/article/readable source about this? Thanks, Leandro Ferreira ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- Random Lines 3D My online portfolio www.therandomlines.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] drag and rotate, where do I begin?
Sure, drag and throw is not a problem, nor is rotation based on an arbitrary point, but deciding how an object should rotate based on where the user pressed and how he dragged it. But thanks anyway. About ready-made classes: with APE or box2D I could manage to recreate this, but that's not the point: what I want is to understand how it's done. Anyone? Leandro Ferreira On Thu, Jul 3, 2008 at 1:19 AM, Ashim D'Silva [EMAIL PROTECTED] wrote: Basically it's using velocity well. The dragging and throwing is pretty easy to figure out with basic physics (velocity and decay/friction). The rotation is a little trickier I imagine using some sort of Matrix transformations to dynamically decide a point to rotate around. Look for rotations around an arbitratrary point. I don't have enough knowledge to actually help you out directly but hopefully this will lead you in some direction. Maybe there are some ready made classes... Ashim -- Random Lines 3D My online portfolio www.therandomlines.com 2008/7/3 Leandro Ferreira [EMAIL PROTECTED]: Hi there, I was trying to understand how this( http://www.ffiles.com/flash/templates/drag_and_rotate_website_1670.html) kind of movement works, but I have no idea on what to search for. At first I got an physics book about classical mechanics, but didn't find it useful, and can't find the exact theories involved in order to look for and applied use. Then I began working 'intuitively' in it, with some trigonometics and so, but things got ugly and now I'm kind of stuck. Does anyone here know where can I find some information/article/readable source about this? Thanks, Leandro Ferreira ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders -- Random Lines 3D My online portfolio www.therandomlines.com ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
