Euler angles are more human understandable and also good for decomposing rotations into individual degrees of freedom (for kinematic joints and the like) but have disadvantages like ambiguity and gimbal lock. In practice I would prefer quaternions, as they are easier to compute with (for the computer, not for humans) and more efficient. You have … Read more
A vastly easier solution for ICS is to use the following from the command line adb shell /system/bin/screencap -p /sdcard/screenshot.png adb pull /sdcard/screenshot.png screenshot.png This’ll save the screenshot.png file in the current directory. Tested on a Samsung Galaxy SII & SII running 4.0.3.
You can do it a couple of different ways. You can use unsafe to get direct access to the data, or you can use marshaling to copy the data back and forth. The unsafe code is faster, but marshaling doesn’t require unsafe code. Here’s a performance comparison I did a while back. Here’s a complete … Read more
g.setFont(new Font(“TimesRoman”, Font.PLAIN, fontSize)); Where fontSize is a int. The API for drawString states that the x and y parameters are coordinates, and have nothing to do with the size of the text.
Double buffering and fancy drawing tactics are only half the story. The other half, some would argue the more critical half, is to limit how much of your control is invalidated. In your comments, you mention that you use RedrawWindow(handle, @R, 0, rdw_Invalidate or rdw_Frame). What are you setting the R rectangle to? If you … Read more
PlantUML. http://plantuml.sourceforge.net/sequence.html PlantUML is used to draw UML diagram, using a simple and human readable text description. The generated images can then be used without any reference to the GPL/LGPL/ASL/EPL/MIT license. It is not even necessary to stipulate that they have been generated with PlantUML, although this will be appreciate by PlantUML team. In my … Read more
The problem can be solved by finding a feasible point of a Linear Program. If you’re interested in the full details, as opposed to just plugging an LP into an existing solver, I’d recommend reading Chapter 11.4 in Boyd and Vandenberghe’s excellent book on convex optimization. Set A = (X[1] X[2] … X[n]), that is, … Read more
Look at the rock of the bottom of that last image – it’s got sandy-colored lines going through it. Presumably, you are drawing the sand first, then the rock on top. This tells me it’s not “black lines being drawn” through the textures, but that parts of the textures are not being drawn. Since it … Read more
You might have something like this somewhere : UIColor(red: 255, green: 255, blue: 255, alpha: 1.0) need to be changed like this now : UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0) SO : UIColor(red: 255/255, green: 255/255, blue: 255/255, alpha: 1.0)
Note the example given is a left-handed, row major matrix. So the operation is: Translate to the origin first (move by –eye), then rotate so that the vector from eye to At lines up with +z: Basically you get the same result if you pre-multiply the rotation matrix by a translation –eye: [ 1 0 … Read more