June 2013
Intermediate to advanced
346 pages
8h 42m
English
Content preview from OpenGL ES 2 for Android
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Drawing to the Screen
With the final connections in place, we’re now ready to start drawing to the screen! We’ll draw the table first, and then we’ll draw the dividing line and the mallets.
Drawing the Table
Let’s add the following code after the call to glClear, at the end of onDrawFrame:
| AirHockey1/src/com/airhockey/android/AirHockeyRenderer.java | |
| | glUniform4f(uColorLocation, 1.0f, 1.0f, 1.0f, 1.0f); |
| | glDrawArrays(GL_TRIANGLES, 0, 6); |
First we update the value of u_Color in our shader code by calling glUniform4f. Unlike attributes, uniforms don’t have default components, so if a uniform is defined as a vec4 in our shader, we need to provide all four components. We want to start out by drawing a white table, so we set red, green, and blue to 1.0f ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.