rotation

RaphaelJS rotation not working

由 可紊 提交于 2019-12-23 11:39:26
问题 I'm banging my head against a wall with this one. I have raphael js version 2.0 and I need to make images rotate in a way that's cross-browser. I would love to do it in CSS3, but not all browsers support what I need to do. so, after racking my brain, I went to the Raphael playground and tried out some code in there. Doesn't work there either. What's going on here? go to playground: http://raphaeljs.com/playground.html run this code, should see an outline of a square. paper.rect(100, 100, 300

iPhone UIActionSheet auto-rotating not working

由 流过昼夜 提交于 2019-12-23 10:40:49
问题 I read a lot about that. People say it will not autorotate whene its parent is not set to auto rotate. I tried everything but no luck. I created view-based app (v4.2) with a button that executes this: UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Title" delegate:self cancelButtonTitle:@"Cancel Button" destructiveButtonTitle:@"Destructive Button" otherButtonTitles:@"Other Button 1", nil]; actionSheet.actionSheetStyle = UIActionSheetStyleBlackOpaque; [actionSheet

Rotation and position:absolute (IE8 and lower)

由 岁酱吖の 提交于 2019-12-23 09:59:58
问题 I have a problem with the rotation in Internet Explorer 8 and lower. I am able to rotare a parent div, but the child (positioned absolute) doesn't rotate with its parent. When I don't position the child absolute, it does the right rotation. Here is my code <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"

Get Auto-Rotate Information On Android

由 江枫思渺然 提交于 2019-12-23 09:06:10
问题 I am working on an app for Android, for which I would like to know whether or not Auto-Rotate is enabled. Does anybody know how I can get this? So just for clarity: I only need to know whether or not a user has Auto-Rotate enabled in their settings or not. 回答1: You can Get Auto-Rotate Information On/Off Using Settings.System.ACCELEROMETER_ROTATION as : if (android.provider.Settings.System.getInt(getContentResolver(),Settings.System.ACCELEROMETER_ROTATION, 0) == 1){ Toast.makeText(Rotation

Release memory when working with PIL

由 吃可爱长大的小学妹 提交于 2019-12-23 08:57:34
问题 I'm editing an image with PIL (Python Imaging Library). On each step (convert, rotate, resize ...) there are more images created. (An excerpt from the documentation: "Returns a copy of an image rotated the given number of degrees ...") So I want to release memory. Do you know whether the following approach saves memory? import PIL.Image image = PIL.Image.open('Image.jpg') garbage = image image = image.convert('RGB') del garbage 回答1: You don't need to make the temporary garbage reference. When

Rotating an image using css

由 两盒软妹~` 提交于 2019-12-23 08:07:17
问题 I'd like to rotate an image on a webpage through four orientations at 90 degrees apart. I'd prefer this to happen on the client machines. Can this be done using css? Or will I need to use javascript? Thank you for your time. 回答1: You can do it in Firefox using these CSS transforms - as for other browsers, I think you'll need Javascript. I'd recommend you perhaps take a look at the Raphael library. 回答2: It is possible however only for new browsers. Best Link I could find (Chrome / Safari /

How to get Angle of velocity to rotate a bullet?

由 点点圈 提交于 2019-12-23 06:00:09
问题 I have this: CGPoint vel = hudLayer.rightJoystick.velocity; CCBullet* sp = [CCBullet spriteWithFile:@"green.png"]; sp.position = player.position; [self addChild:sp z:-10]; vel = ccpMult(ccpNormalize(vel), 300); sp.rotation = //how to get the rotation out of the velocity? Any help? 回答1: float angle = atan2f(vel.y, vel.x); 来源： https://stackoverflow.com/questions/5729221/how-to-get-angle-of-velocity-to-rotate-a-bullet

Three.JS: Get position of rotated object

由 情到浓时终转凉″ 提交于 2019-12-23 05:17:21
问题 In Three.JS, I am capable of rotating an object about its origin. If I were to do this with a line, for instance, the line rotates, but the positions of its vertices are not updated with their new locations. Is there some way to apply the rotation matrix to the position of the vertices to find the new position of the point? Say I rotate a line with points at (0,0,0) and (0,100,100) by 45° on the x, 20° on the y, and 100° on the z. How would I go about finding the actual position of the

Rotate y-axis label in scatterplot3d (adjust to angle of axis)

由 风格不统一 提交于 2019-12-23 05:04:55
问题 I use scatterplot3d to plot 3D with R. The orientation of the y-axis label bothers me because it is vertical and not parallel to the y-axis. Is there a way to rotate the label and adjust its angle? Unfortunately, I didn't finde anything in the documentation. 回答1: If you don't have to draw many plots and are willing to adjust values manually, you can pass ylab = "" when making the 3d scatter and then add text later on with appropriate srt value. srt allows you to rotate text at desired angle.

Best way to change UIViewController view NIB programmatically

由 房东的猫 提交于 2019-12-23 04:53:36
问题 I have this iPad application with different NIBs and views. Each view has two NIBs, one for potrait orientation and one for landscape, so i'm searching for a method to programmatically switch NIB for a given UIViewController . Right now i have this function that i'm using in the willRotateToInterfaceOrientation method of each controller : void UIHandleRotation( UIViewController *controller, NSString *nibName, UIInterfaceOrientation orientation, BOOL transform ){ double angle = 0.0; if(
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