Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I show how to display an image as a texture in OpenGL ES 2.0 on the iPhone in <a href="http://www.sunsetlakesoftware.com/sites/default/files/ColorTracking.zip" rel="nofollow">this example</a>, where the image is a frame of video from the camera, and <a href="http://www.sunsetlakesoftware.com/sites/default/files/CubeExample.zip" rel="nofollow">this example</a>, where I pull in a PVR-compressed texture as an image. The former example is described in the writeup <a href="http://www.sunsetlakesoftware.com/2010/10/22/gpu-accelerated-video-processing-mac-and-ios" rel="nofollow">here</a>.</p> <p>I describe how the vertex and fragment shaders work, along with all the supporting code for them, in the video for the OpenGL ES 2.0 class which is part of my freely available iOS development course <a href="http://deimos.apple.com/WebObjects/Core.woa/Browse/matcmadison.edu.3989485784.04638434143" rel="nofollow">on iTunes U</a>. Additionally, I highly recommend you read Jeff LaMarche's <a href="http://iphonedevelopment.blogspot.com/search/label/Book%20project" rel="nofollow">series of posted chapters</a> from his unpublished OpenGL ES 2.0 book.</p> <p>In short, once you have the texture loaded in, you'll need to attach it as a uniform to your shader program using code like the following:</p> <pre><code>glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, myTexture); glUniform1i(myTextureUniform, 0); </code></pre> <p>Within your fragment shader, you'll need to define the texture uniform:</p> <pre><code>uniform sampler2D myTexture; </code></pre> <p>and then sample the color from the texture at the appropriate point:</p> <pre><code>gl_FragColor = texture2D(myTexture, textureCoordinate); </code></pre> <p>Again, I go into this in more detail within my class, and you can use these examples as starting points to work from.</p>
    singulars
    1. This table or related slice is empty.
    1. PODisplaying images in open gl es 2.0 on iPhone
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USBrad Larson
    1. USBrad Larson
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PODisplaying images in open gl es 2.0 on iPhone
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COCool I'll try that as well and see if it gets me anywhere. Thanks very much! How big are the files for the iTunes U stuff btw? They look pretty big and I've got limited space on my computer as is. Looks very helpful though and if I wasn't already subscribed to so many podcasts, I'ld download a few more of these at a time.
      singulars
      1. PO
      1. USSlayer0248
    2. COLol. I think I've figured out part of my problem. I'm using 4.2 beta so that's also a bit different. lol. Maybe I should have specified. My bad.
      singulars
      1. PO
      1. USSlayer0248
    3. CO@Slayer0248 - The classes tend to run around 700-800 MB apiece (it was the smallest I could make 3 hours of 720p video). Also, I'm not sure why you think iOS 4.2 has anything to do with this. I've noticed no change in behavior across this OS update when it comes to OpenGL ES 2.0.
      singulars
      1. PO
      1. USBrad Larson
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload