rotation

问题 I have a sprite : ombreoeuf1 = [CCSprite spriteWithFile:@"mangeurcentremieu3_03.png" ]; ombreoeuf1.position = ccp(240,160); [self addChild:ombreoeuf1]; And I would like to rotate it constantly around an anchor point. How can I do it? 回答1: You can first set anchor point by setting the property anchorPoint , for example: [ombreoeuf1 setAnchorPoint:ccp(0,0)] and then set rotation (in degrees) by setting another property rotation : [ombreoeuf1 setRotation:90] anchorPoint and rotation are both

问题 I have a sprite : ombreoeuf1 = [CCSprite spriteWithFile:@"mangeurcentremieu3_03.png" ]; ombreoeuf1.position = ccp(240,160); [self addChild:ombreoeuf1]; And I would like to rotate it constantly around an anchor point. How can I do it? 回答1: You can first set anchor point by setting the property anchorPoint , for example: [ombreoeuf1 setAnchorPoint:ccp(0,0)] and then set rotation (in degrees) by setting another property rotation : [ombreoeuf1 setRotation:90] anchorPoint and rotation are both

问题 I want to rotate an image about a specific pixel position and not about the centre of the image. I want to rotate the image by certain degrees less than 90. I've made use of rotate function of the graphics class but i get the image blurred when rotated. How to remove this blur? Is there a specific function for this? This is the code i am using right now: BufferedImage oldImage = ImageIO.read(new File("C:/omr/OMR_Rotation_1.jpg")); BufferedImage newImage = new BufferedImage(oldImage.getWidth()

问题 In the Processing program, I have to make a cube to move in place where the cube moves when pressing lowercase x for counterclockwise of x axis, or pressing capital X for clockwise of x axis, and pressing lowercase y for counterclockwise of y axis, or pressing capital Y for clockwise of y axis, and pressing lowercase z for counterclockwise of z axis, and pressing capital Z for for clockwise for z axis. The problem is that the cube moves out of place, but it does rotate. How do I rotate, but

问题 Having a first-person camera looking at direction d. In order to let the camera point to a target t (with associated direction d2) I would have to rotate d around some axis, right ? This axis should go through the camera and should be perpendicular to the plane formed by d and d2, right ? Suppose I am rotating the vector d by some degree per frame the rotation axis shouldn't change because though d is slowly approaching d2 their corresponding plane doesn't change, right ? Well, if that's all

问题 I want to change the rotation mode in my application programmatically. All the discussions I found were about disabling rotation in specific Activities. I want to lock the whole phone in portrait mode. How do I accomplish this? Edit. To clarify, I want to lock the whole phone including all other apps, settings etc. Not just my own app. 回答1: Add the following to your Activities onCreate: setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 回答2: The easiest, fastest, and

问题 I am rotating a clock hand around clock center, and I am using: Vector3 dir = mouseClickPos - transform.position; float angle = Mathf.Atan2(dir.y,dir.x) * Mathf.Rad2Deg; transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward); And it is working like a charm. But I need it not to go smooth but to skip around 15 degrees. How can I do that? 回答1: Try angle=Mathf.Round(angle/15f)*15f (sorry for the wrong math at first, need coffee) 来源： https://stackoverflow.com/questions/24673043/rotate

问题 I am having problem while rotating the image in IE 8 , it works perfect in other browsers(Chrome,Mozilla,Firefox). Is there any other way for this except filter progid:DXImageTransform.Microsoft.Basic Image(rotation) as I am having some problem while using this filter in zooming the image in IE 8. After a perticular level of zoom ,image resets to its normal rotation(Angle 0) before that zoom level everything goes perfect but once this scenario occurs image resets on every zoom level on

问题 Basically, what I've got going is a timer that counts every half second and on that it should update the degree and the div should be rotated to the new degree. The end result of this should (theoretically) be a somewhat smooth constantly rotating div. Sadly, it goes as far as rotating it 1 degree and then the degree is not updated again even though according to the console log the number is still counting up. Any suggestions? setInterval(function() { var i = 0; i++; $('#nav').css({'-webkit

问题 I looked at many examples but so far nothing worked. I want the circle to rotate on mousemove and it is rotating centered, so no problems so far. But, it does a 180 jump when I pass half of the stage. So everything is fine till I pass the half of the stage, clearly I'm missing something. Math.atan2 gives me an error: the circle jumps to the (0,0) of the stage. Please help I really need this badly. Thanks in advance! new Kinetic.Tween({ node: cGrad1, x: stage.getWidth()/2, y: stage.getHeight()