I want to detect the device motion like Panorama i.e. motion from my left side to Right side.
I tried with the accelerometer but i can't able to do it.
I like to move one image in a straight line as the device move.
My code is as follow:
- (void)viewDidLoad
{
[super viewDidLoad];
[[UIAccelerometer sharedAccelerometer] setUpdateInterval:1/60];
[[UIAccelerometer sharedAccelerometer]setDelegate:self];
}
pragma mark - Accelerometer Delegate
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:
(UIAcceleration *)acceleration{
valueX = acceleration.x*100.0;
valueY = acceleration.y*30.0;
float newX = (float)(ball.center.x + valueX);
CGPoint newCenter = CGPointMake(newX, 50);
ball.center = newCenter;
}
How can I do this? Because there are many apps who uses this.
Please guide me.
Thanks..
Related
I made an augmented reality Application, there I have an arrow points on the z-axis to the location (longitude & latitude) of one shop now I'd like to make an annotation in the "sky" which points direct on the shop coordinate. I found some projects on github, like iPhone-AR-Toolkit, but I don't understand this.
Is there a simple way to add such an annotation above the location?
Edit:
After searching a lot I find a pdf document in de web, which contains some code for that what I want, but the problem is, I don't understand it and it doesn't do the things right.
The Code:
// Artificial Horizon - compensate for rotation along x-axis
// need to know the field of view of the camera to find horizon position inside of camera view
// about 53 degrees vertical and 37.5 degrees horizontal
// for directional Horizon - artificial horizon pegged to a specific cardinal direction (North)
// in (void)viewDidAppear
// Load the image to show in the overlay
UIImage *overlayGraphic = [UIImage imageNamed:#"Punkt.png"];
overlayGraphicView = [[UIImageView alloc] initWithImage:overlayGraphic];
overlayGraphicView.frame = CGRectMake(30, 100, 50, 50);
[self addSubview:overlayGraphicView];
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
locationManager = [[CoreLocationMangager alloc] init];
[locationManager setDelegate:self];
[locationManager startUpdatingHeading];
- (void) updateUI {
CGPoint overlayCenter = [overlayGraphicView center];
overlayCenter.y = 240.0 - 537.8 * sin(vertAngle);
overlayCenter.x = 160.0 - 497.8 * sin((magCompassHeadingInDeg) * (M_PI / 180.0));
[overlayGraphicView setCenter:overlayCenter];
overlayGraphicView.transform = CGAffineTransformMakeRotation(angle);
}
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
vertAngle = -atan2(acceleration.y, acceleration.z) - M_PI/2.0;
vertAngleInDeg = vertAngle * 180.0f/M_PI;
angle = -atan2(acceleration.y, acceleration.x) - M_PI/2.0;
angleInDeg = angle * 180.0f / M_PI;
[self updateUI];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading {
magCompassHeadingInDeg = [newHeading magneticHeading];
[self updateUI];
}
There is an image View is added to a camera overlay, and this image should point to North - but my problem is it also points to South. How can i fix that? And can anybody explain me thr values from the overlayCenter.y and .x - I don't understand them.
You need to Specify an altitude to specify the height from sea-level that is z-axis.
Mixare SDK will allow you to specify and load your POI's with latitude, longitude and altitude.
You can refer it from here
I have used this sdk and it works great and allows you specify Altitude.
Hope this helps:)
I'm trying to make the box2d accelerometer work, I have a car sprite and want it to move left and right, when the iPhone is tilted.
Here is the code for the sprite:
- (void)spawnCar {
car = [CCSprite spriteWithSpriteFrameName:#"car.jpg"];
car.position = ccp(160, 250);
car.tag = 2;
[self addBoxBodyForSprite:car];
[_spriteSheet addChild:car];
}
How can implement the accelerometer to work for left and right?
Just do this...
in your init add
self.isAccelerometerEnabled = YES;
and then add this method...
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
b2Vec2 gravity(-acceleration.y * 15, acceleration.x *15);
world->SetGravity(gravity);
}
I made a space game where you use the accelerometer to move a spaceship, When I try the game on my devices (iPad, iPhone) it work well with no errors or incorrect behavior.
I upload my game to the App Store and it was approved, but when I downloaded the game from the App Store, the accelerometer wasn't working and my spaceship was stuck in one direction.
I tried many devices and they all have same problem.
Note: I used the cocos2d and box2d frameworks.
If anybody have any idea, please help!
Use UIAccelerometerDelegate
UIAccelerometer *accelerometer;
In .m file
# pragma mark To Enable Acceleromete
self.isAccelerometerEnabled = YES;
self.accelerometer = [UIAccelerometer sharedAccelerometer];
self.accelerometer.updateInterval = 0.025;
self.accelerometer.delegate = self;
Use these delegates methods
#pragma Mark Accelerometer
-(void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
// Set up variables
CGSize winSize = [CCDirector sharedDirector].winSize;
#define kFilteringFactor 0.5
#define kShipMaxPointsPerSec (winSize.height*0.5)
#define kRestAccelX (xCallib)
#define kMaxDiff 0.2
#define kRestAccelY (yCallib)
#define kMaxDiffY 0.1
UIAccelerationValue rollingX=0;
float accelX;
// High pass filter for reducing jitter
rollingX = (acceleration.x * kFilteringFactor) + (rollingX * (1.0 - kFilteringFactor));
accelX = acceleration.x - rollingX;
// Calculate movement for x and y axis
float accelDiffX = accelX - kRestAccelX;///
float accelFractionX = accelDiffX / kMaxDiff;//
movementX = kShipMaxPointsPerSec * accelFractionX;
// Thresh holds for x and y axis movement
willMoveX = YES;
if (((movementX < 45.0f) && (movementX > -45.0f)))
willMoveX = NO;
}
#pragma Mark Accelerometer Update Methods
-(void) update:(ccTime)dt
{
CCSprite *player =(CCSprite *) [self getChildByTag:objPlayerShipTag];
CGSize screenSize = [[CCDirector sharedDirector]winSize];
float oldX = [player position].x;
float newX;
if (willMoveX) {
newX = [player position].x + (movementX * dt);
} else newX = oldX;
if ((newX > (screenSize.width -45)) || newX < 45.0f ) {
newX = oldX;
}
[player setPosition:ccp(newX,90)];
// ++++++++ To generate Bullet and Bomb Power +++++++
[self checkForCollisionWithPowersBullets]; //NEW
[self checkForCollisionWithPowersBomb];
}
Hi everyone I'm french so scue me for my english. So I have a problem.What I'm doing is when I turn device to left or right with accelerometer an image rotate in the opposite direction of the rotation of the device it create a cool effect but when I rotate the device with accelerometer the image is rotating but it is always trembling, vibrating the movement is not smooth. What can I do ? here is the code:
#import "QuartzCore/QuartzCore.h"
#define CONST_fps 100.
#define CONST_map_shift 0.05
#implementation MapViewRotationViewController
- (void)viewDidLoad {
[super viewDidLoad];
// accelerometer settings
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
[[UIAccelerometer sharedAccelerometer] setUpdateInterval:(1.0 / CONST_fps)];
}
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
static CGFloat ZZ = 0.;
CGFloat z = (atan2(acceleration.x, acceleration.y) + M_PI);
if (fabsf(ZZ - z) > CONST_map_shift)
{
viewToRotate.layer.transform = CATransform3DMakeRotation(ZZ=z, 0., 0., 10.);
}
}
#end
You need to do a trick that is called high pass filter. It filters trembling, only significant changes will pass.
You can google it, or search on StackOverflow. For example, here: How do you implement a Highpass filter for the IPhone accelerometer?
I haven't had any experience with the accelerometer yet and i was wondering how i would move my UIImageView with the accelerometer, can anyone point me to any tutorials or give me a little help?
thanks,
harry
There are a collection of tutorials here http://www.iphonedevforums.com/forum/sdk-coding-help/854-how-use-accelerometer.html which should meet your needs.
//viewDidLoad
UIAccelerometer *accel = [UIAccelerometer sharedAccelerometer];
accel.delegate = self;
accel.updateInterval = 1.0f/60.0f;
//then
- (void)accelerometer:(UIAccelerometer *)acel didAccelerate:(UIAcceleration *)aceler {
//move your image here
//based on aceler.x aceler.y aceler.z
}