{"id":1697,"date":"2011-09-24T16:40:45","date_gmt":"2011-09-24T20:40:45","guid":{"rendered":"http:\/\/www.acarlstein.com\/?p=1697"},"modified":"2011-10-21T15:23:14","modified_gmt":"2011-10-21T19:23:14","slug":"ios-programming-part-1","status":"publish","type":"post","link":"http:\/\/blog.acarlstein.com\/?p=1697","title":{"rendered":"iOS and OpenGL ES Programming – Part 1"},"content":{"rendered":"

After finish my last project, Cupid-4-Stupid<\/a>, for the Android Market, I decided to play around the iPhone\/iTouch.<\/p>\n

I have many books and tutorial at my disposal; however, most of them do not reflex the changes that Objective-C have being doing. I will be adding references as a work cities at the end of the posting<\/p>\n

Even do most of the code seems to work, many produce warning all around; so, I have to do what I do best… improvise.<\/p>\n

I am going to post the different steps I am taking in order to learn how to program on iOS and OpenGL using XCode and Objective-C.<\/p>\n

Just to clarify, iOS use OpenGL ES which is a lite version of OpenGL. At the momento of writing this post there are two versions of OpenGL ES: OpenGL ES 1.0 (ES1) and OpenGL ES 2.0 (ES2).<\/p>\n

I bought XCode version 4.0.2. It cost me around 5 dollars. Later on, I found out the negative reviews that this version had generated. I am hoping that soon Apple address all the issues that people are complaining around the web.<\/p>\n

(I am assuming that you have this version installed in your computer)<\/p>\n

First lets create a new application:<\/p>\n

    \n
  1. Open the application by clicking here
    \n    \"\"\u00a0<\/a><\/li>\n
  2. Select the option [Create a new Xcode project]
    \n    \"\"\u00a0<\/a><\/li>\n
  3. Select OpenGL ES Application
    \n    \"\"
    \n<\/a><\/li>\n
  4. Fill the information such as product name (Example 01), company name (your.company.name), and the device family (iphone)
    \n    \"\"
    \n<\/a><\/li>\n
  5. A window will show up asking you where to save the project. Press [New Folder]
    \n    \"\"\u00a0<\/a><\/li>\n
  6. Type the name of the folder (Example01) that will hold your project
    \n    \"\"\u00a0<\/a><\/li>\n
  7. Access to the folder that you created and press the button [Create]
    \n    \"\"\u00a0<\/a><\/li>\n
  8. Now you should see what I call the workbench, where you will be working on.
    \n    \"\"<\/a><\/li>\n
  9. If you press [Run]
    \n    \"\"
    \n<\/a>you will see the iPhone simulator running your project
    \n    \"\"
    \n<\/a>The code that makes this work is already done for you. Now you are ready to begin modifying and adding your own files.<\/li>\n
  10. If for some reason you cannot find something such as the [Run] button, you can go to View menu that is on the top of your screen and select which part you wish to hide or show
    \n    \"\"<\/a><\/li>\n<\/ol>\n

     <\/p>\n

    Check for the next part of this tutorial. We shall start\u00a0analyzing\u00a0the basic files that Xcode generates for your example to work.<\/p>\n

    (iOS Programming – Part 2) Next ><\/a><\/p>\n

    Notification<\/strong><\/p>\n

    These examples are provided for educational purposes. Using this code is under your own responsibility and risk. The code and information is given \u2018as is\u2019. I do not take responsibilities of how they are used.<\/p>\n\n