opengl es 2.0 shader 3d object tutorial android

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. Rotate(&matModelview, 0.0f, 1.0f, 0.0f, 1.Android offers support for 2D and 3D graphics with the OpenGL ES API. So, with this code : LoadIdentity(&matPerspective) (deltaX <= 0.0f) || (deltaY <= 0.0f) || (deltaZ <= 0.0f))įrustum.m = frustum.m = frustum.m = 0.0f įrustum.m = (right + left) / deltaX įrustum.m = (top + bottom) / deltaY įrustum.m = -(nearZ + farZ) / deltaZ įrustum.m = -2.0f * nearZ * farZ / deltaZ Letter::Frustum(Matrix *result, float left, float right, float bottom, float top, float nearZ, float farZ) Letter::Ortho(Matrix* result, float fovy, float aspect, float nearZ, float farZ)įrustumH = tanf(fovy / 360.0f * PI) * nearZ įrustum(result, -frustumW, frustumW, -frustumH, frustumH, nearZ, farZ) Ok, You have your ortho matrix and quad, so whats the problem, translate modelview matrix of your quad to desired position (x,y,z=0), multiply it by ortho matrix, pass multiplied matrix to vertex shader, multiply vert position by your matrix and done :), i am not using any lookat function in my code to do this, but i have own code for matrices computation its partially code from some bada tutorial, for projection matrix i have other function.

Opengl es 2.0 shader 3d object tutorial android