rotation

问题 I have 2 IMU's (Inertial measurement units) and I want to calculate their relative rotation. Unfortunately, the output of the IMU's gives me both quaternions relative to global (I'm assuming that's how quaternions work). However, I need measurements of the rotation of one of the sensors relative to the other. All the while, these two sensors have been rotated from their initial orientation in the global axis. For example: I have one sensor attached to the chest and the other attached the arm.

问题 What I'm trying to do is, to flip image horizontally on radio button click. private void radioButton1_CheckedChanged(object sender, EventArgs e) { arrow.Image.RotateFlip(RotateFlipType.RotateNoneFlipX); } private void radioButton2_CheckedChanged(object sender, EventArgs e) { arrow.Image.RotateFlip(RotateFlipType.RotateNoneFlipX); } The code above doesn't flip image: image stays as it is. What am I missing? 回答1: You need to cause it to redraw, you can force this manually by doing private void

问题 My root view controller's implementation of supportedInterfaceOrientations almost always returns UIInterfaceOrientationMaskAll , however there is one edge case where it returns UIInterfaceOrientationMaskLandscape . This is working, if the user rotates the device. However if the device is being held in portrait mode the supportedInterfaceOrientations method does not ever get called, unless the user manually rotates the device. How can I programatically tell the system that the return value of

问题 Need to prevent screen rotation on specific view controller I've tried below- public override bool ShouldAutorotateToInterfaceOrientation(UIInterfaceOrientation toInterfaceOrientation) { return false; } public override bool ShouldAutorotate() { return false; } public override UIInterfaceOrientation PreferredInterfaceOrientationForPresentation() { return UIInterfaceOrientation.Portrait; } public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations() { return

问题 Hi I have Android APP with 4 tabs (let's say tab1, tab2, tab3, tab4). When activity starts default tab is tab1. Than I switch to any other tab (tab2, 3 or 4) and change screen orientation and it always resets to default tab (tab1). I tried with the following code: @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); setContentView(R.layout.main); createView(); } And inside createView() I have: private void createView() { ... // Tabs

问题 (new to stackoverflow, new to webgl/three.js, ...) I'm using three.js r54 to plot a force-directed graph. the edges between the nodes are THREE.Lines, which is fine, but lines are not selectable with a raycaster. so my aim is to take cylinders instead(/along with) of lines(also because I can do some further stuff: using textures,...) this is what I'm doing to place the cylinders: // init reference vector var upVec = new THREE.Vector3(0,1,0); //---withhin a loop--- // get direction var

问题 I need to generate a regular graph (also known as lattice network) which has 100x100 nodes. I started off with drawing a 10x10 graph with the following code: import numpy from numpy import * import networkx as nx from networkx import * import matplotlib.pyplot as plt G=nx.grid_2d_graph(10,10) nx.draw(G) plt.axis('off') plt.show() but what I get is this: Is there any way of getting rid of this sort of rotation effect the output has? My final network must look like a chess table, just like this

问题 I have developed an android/ios video sharing app that records a video and uploads it to amazon s3. For compatibility both android/ios record in mp4 format with H264/AAC codecs. The users might shoot portrait or landscape and the app, getting info from the sensors, set the rotation of the file (mediarecorder.setOrientationHint on android and something similar on iOS) The videos from iOS play fine on android and vice versa. The problem is when i want to play a video on a web browser. The

问题 I have developed an android/ios video sharing app that records a video and uploads it to amazon s3. For compatibility both android/ios record in mp4 format with H264/AAC codecs. The users might shoot portrait or landscape and the app, getting info from the sensors, set the rotation of the file (mediarecorder.setOrientationHint on android and something similar on iOS) The videos from iOS play fine on android and vice versa. The problem is when i want to play a video on a web browser. The

问题 Summary I am attempting to add a child view controller to a parent view controller, and have the parent view controller inform the child view controller of rotation events. However, the rotation messages are not being forwarded to the child view controller (which is the default behavior). Why is this default behavior not occurring? Environment: iOS 7, XCode 5, OSX 10.9 Details: I am implementing a custom container view controller following instructions in the Apple Document: "Creating Custom