OpenGL ES 2 for Android

Drawing Each Point as a Sprite

The technique we just learned works, but sometimes a texture works better. Using the same gl_PointCoord and a texture, we can actually draw each point as a point sprite. We’ll change our particle shader to use the texture shown in Figure 55, ​Texture for Particles​ for each particle.

Figure 55. Texture for Particles

This texture (particle_texture.png) and all of the textures that we’ll use in future chapters can be downloaded from this book’s home page. I recommend storing this texture in your project’s /res/drawable-nodpi/ folder.^[51]

We’ll use the knowledge that we’ve learned in Chapter 7, ​Adding Detail with Textures ...