acceleration

What's the best way to immediately stop the deceleration of an UIScrollView in iPhone 3.0? I would like to keep the deceleration of the UIScrollView until it naturally stops or the user performs a certain action, whatever happens first. Thanks! Untested suggestion coming up:) When the button tap event is caught, you read what the [scrollView contentOffset].x is, and set the offset to this value with animation OFF. 来源： https://stackoverflow.com/questions/2037892/stop-deceleration-of-uiscrollview

Hello all What I mean is while the mouse is moving towards the edge of the window (x or y or both), I want the page to scroll, and when the mouse stops moving, I want the page to stop scrolling. There are numerous examples of how to scroll based on using a onClick event or a scroll zone at the edge of a window, but not much based on the movement of the mouse cursor. Any help would be much appreciated. Web pages are already designed to scroll using the scroll bar, page/home/end/arrow keys, etc. Is there any reason that's insufficient for your page? It's usually not a good idea to alter expected

I've tried the typical physics equations for this but none of them really work because the equations deal with constant acceleration and mine will need to change to work correctly. Basically I have a car that can be going at a large range of speeds and needs to slow down and stop over a given distance and time as it reaches the end of its path. So, I have: V0 , or the current speed Vf , or the speed I want to reach (typically 0) t , or the amount of time I want to take to reach the end of my path d , or the distance I want to go as I change from V0 to Vf I want to calculate a , or the

I need to calculate iphone velocity in space, punch speed for example. My first question is: Are the acceleration values accelerometer:didAccelerate with this filtering actions: gravity_x = acceleration.x * kFilteringFactor + gravity_x * (1.0 - kFilteringFactor); gravity_y = acceleration.y * kFilteringFactor + gravity_y * (1.0 - kFilteringFactor); gravity_z = acceleration.z * kFilteringFactor + gravity_z * (1.0 - kFilteringFactor); float gravityNorm = sqrt(gravity_x * gravity_x + gravity_y * gravity_y + gravity_z * gravity_z); accelX = acceleration.x - gravity_x / gravityNorm; accelY =

With Which Sensor I Can Detect when device is moving to a direction In Absolute Coordinate(for example moving to +x or -x). I need accurate data,so i cannot use GPS . the Complete Task is to plot in paint(in computer) with android device sensors and this part of task in unknown for me. I'm a little confused about what you're asking. Do you want to put a device in your pocket and walk around, and make a plot of everywhere you walked? Or do you want to wave the device around in your hand like a 3-d mouse, for painting? For the latter, see Ali's suggestion above. If you want to do motion tracking

I want to build something like this but using an android phone: http://www.youtube.com/watch?v=WOt9mb5QqRs I've already built an app that sends sensor information via socket (still looking for a good websocket implementation for android). I intend to use that information to interact with a web app, so for example i would be able to move an image based on the phone movement. The problem is that I tried to calculate distance based on the accelerometer data but the results are really bad. I wonder if anyone could help me with the correct equation, but first of all, is it possible to do this? Till