You can specify the vertex order used for the triangles with gl.glFrontFace(GL10.GL_CCW) for counter clockwise orientation or gl.glFrontFace(GL10.GL_CW) for clockwise. For areas, they are constructed by connecting oriented triangles. For lines, they are formed by connecting the indices from the vertex array. For points, OpenGL uses gl.glVertexPointer to refer to the buffer for vertices contained in an array with X, Y, Z values. Geometric elements include points, lines, areas, and so on.OpenGL Geometric Elements, Rendering Primitives and Colorsīefore we move on to our first example, there are some brief descriptions that should help you understand the code better if you are an OpenGL beginner. Now you can instantiate this view class and call setRenderer with the renderer implementation you must provide. You will also need it to capture user interaction events. GLSurfaceView is a view class which you use to draw the graphics objects. Public void onSurfaceChanged(GL10 gl, int width, int height) You also must implement Renderer, an interface for the minimal required drawing methods, as follows: public void onSurfaceCreated(GL10 gl, EGLConfig config) The two most important classes you need for OpenGL projects in Android are and. String GL_ES_VERSION = am.getDeviceConfigurationInfo().getGlEsVersion() Android Classes for OpenGL GL

String GL_VERSION = gl.glGetString(GL10.GL_VERSION) ĪctivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE) To find out which OpenGL ES versions your current device supports, you can use the following code: String GL_RENDERER = gl.glGetString(GL10.GL_RENDERER) Since these versions differ in many ways, you should make your selection based on the performance, device compatibility, coding convenience, and graphics control for your implementation. The Android OpenGL ES reference has version descriptions and comparisons among OpenGL ES 1.0/1.1 and 2.0. Android OpenGL References, Versions and Device Support You can download the entire source code for all the demo projects in the examples. This tutorial presents the basics for working on OpenGL ES software in Android by working through a few examples. The support for OpenGL ES 2.0 started from Android 2.2. Since Android 1.0, the OpenGL ES 1.0 and 1.1 APIs have been included. OpenGL ES is just a variation of OpenGL specifically designed for embedded systems. Android offers support for 2D and 3D graphics with the OpenGL ES API.

Glenableclientstate opengl es 2.0