Java 3D comes with support for head-mounted display and can work with most popular 3D scene formats, such as Wavefront OBJ or Lightwave 3D files. Its practical use is extended to both graphics editing or viewing applications and gaming. The API integrates a collection of object-oriented interfaces that rely on the capabilities of the Java programming language to allow the creation and rendering of 3D scenery.
It is capable of building 3D structures and rendering objects to create realistic virtual reality scenes, allowing full mouse and keyboard control. Java 3D provides classes, components and objects that can be used for generating and handling 3D structures.īased on scene graph data structures, Java 3D focuses on designing options, enabling you to manipulate object geometry, material and textures, transparency, 3D vector mathematics, lighting and shading. Java is one of the most popular programming languages, mainly due to its cross-platform compatibility. The package includes a high-level application programming interface (API) that runs along with OpenGL or Direct3D, enabling users to work with three-dimensional objects in a Java-based program. For more complex coloring, we can create an array of the four float values and use gl.glColorPointer to refer to its byte buffer.īuild Your First Basic OpenGL ES Project in AndroidĪs mentioned before, two essential classes required by all OpenGL ES projects are and .Java 3D is an extension to the popular programming language that enables developers to create and implement 3D graphics within their desktop or web applications.
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.
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.