Programming
- page 5Unity: displaying the video input from multiple webcams
Posted by Dimitri | Jul 22nd, 2012
This post explains how to capture the images from a web camera connected to the computer and use them as a texture in Unity. However, this tutorial focuses on switching between the video inputs from different webcams attached to desktop computers (PC and Mac). However it should work on Android with some minor modifications. The code featured in this article has been developed and tested using a free license of Unity 3.5.3f3. As usual an example project with all the code featured in this article is available for download at the end of the post.
Before explaining how to choose from a list of multiple connected webcams to render from, let’s see how to preview the captured images from a single camera. Doing that in Unity is very simple and it can be achieved with just a few lines of code. Take a look at this C# script: Continue reading: “Unity: displaying the video input from multiple webcams”
Android: Changing image color saturation
Posted by Dimitri | Jul 2nd, 2012
It’s the 100th post on 41 Post! This Android programming tutorial shows how to control the color saturation of an image using a SeekBar. The code featured in this post has been tested at an emulated and on a real device both running Android 2.1 . An example project with the code featured below is available at the end of the post.
As previously described, a SeekBar is going to be used to control the saturation of an Bitmap object that is rendered at the screen using a ImageView. Since a screenshot is far more descriptive then trying to explain how the application user interface will end up looking like, here’s a screenshot: Continue reading: “Android: Changing image color saturation”
Android: how to rotate a View element
Posted by Dimitri | Jun 22nd, 2012
Another Android programming tutorial, this time, explaining how to rotate a View element using two distinct approaches. Not only that, but this post also presents a brief explanation on the advantages and disadvantages of each approach. The code featured here has been tested on both the emulator and on a real device running Android 2.1 . Before going any further, please bear in mind that from Android 3.0 (API level 11), a setRotation() method has been added to the View class, therefore, it should be used instead of the code described in this article, which focuses on lower level APIs.
The first and perhaps most direct method of rotating a View element is to create a class that inherits from a View widget that needs to be rotated, for example, the TextView or the Button. Then, inside this class, the onDraw() method must be overridden. Continue reading: “Android: how to rotate a View element”
Android: rendering a path with a Bitmap fill
Posted by Dimitri | May 26th, 2012
This Android tutorial shows how to render a Path that is filled by a Bitmap and displays stroke in a different color. It also explains how to manipulate the texture coordinates to make it independent of the position of the path, just like a mask, but without using any of the PorterDuff rendering modes. The code featured in this code was created and tested on Android 2.1, both on a real and at an emulated device.
Here’s a video of the example application in action:
If you can’t play the video, don’t worry: there is a screenshot of the application at the bottom of this post.
Continue reading: “Android: rendering a path with a Bitmap fill”