Honestly! What is your problem!!!??? :-) lol Now a bit more seriously: Could you describe exactly what problem you have? Your description is rather vague.
Also, this is not all the code you need. I'm missing the Renderer- thread that actually obtains the gl from the canvas can calls drawFrame (gl) repeatedly in its 'run()' method. On Apr 22, 1:06 am, Honest <[email protected]> wrote: > Hello, > > I am facing problem in drawing square in open gl. The following is my > code so please let me know if any thing wrong in it. > > /* > * Copyright (C) 2008 Google Inc. > * > * Licensed under the Apache License, Version 2.0 (the "License"); > * you may not use this file except in compliance with the License. > * You may obtain a copy of the License at > * > * http://www.apache.org/licenses/LICENSE-2.0 > * > * Unless required by applicable law or agreed to in writing, software > * distributed under the License is distributed on an "AS IS" BASIS, > * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or > implied. > * See the License for the specific language governing permissions and > * limitations under the License. > * > */ > > package com.saltriver.TriRender; > > //import com.example.android.apis.R; > import java.io.IOException; > import java.io.InputStream; > import java.nio.ByteBuffer; > import java.nio.ByteOrder; > import java.nio.FloatBuffer; > import java.nio.ShortBuffer; > > import android.content.Context; > import android.graphics.Bitmap; > import android.graphics.BitmapFactory; > import android.opengl.GLU; > import android.opengl.GLUtils; > import android.os.SystemClock; > > import javax.microedition.khronos.egl.EGL10; > import javax.microedition.khronos.opengles.GL10; > > public class TriangleRenderer implements GLSurfaceView.Renderer > { > > public TriangleRenderer(Context context) { > mContext = context; > mTriangle = new Triangle(); > } > > public int[] getConfigSpec() > { > // We don't need a depth buffer, and don't care about our > // color depth. > int[] configSpec = > { > EGL10.EGL_DEPTH_SIZE, 0, > EGL10.EGL_NONE > }; > return configSpec; > > } > > public void surfaceCreated(GL10 gl) > { > /* > * By default, OpenGL enables features that improve quality > * but reduce performance. One might want to tweak that > * especially on software renderer. > */ > > gl.glDisable(GL10.GL_DITHER); > > /* > * Some one-time OpenGL initialization can be made here > * probably based on features of this particular context > */ > gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, > GL10.GL_FASTEST); > > gl.glClearColor(.5f, .5f, .5f, 1); > gl.glShadeModel(GL10.GL_SMOOTH); > gl.glEnable(GL10.GL_DEPTH_TEST); > gl.glEnable(GL10.GL_TEXTURE_2D); > > /* > * Create our texture. This has to be done each time the > * surface is created. > */ > > int[] textures = new int[1]; > gl.glGenTextures(1, textures, 0); > > mTextureID = textures[0]; > gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureID); > > gl.glTexParameterf(GL10.GL_TEXTURE_2D, > GL10.GL_TEXTURE_MIN_FILTER, > GL10.GL_NEAREST); > gl.glTexParameterf(GL10.GL_TEXTURE_2D, > GL10.GL_TEXTURE_MAG_FILTER, > GL10.GL_LINEAR); > > gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, > GL10.GL_CLAMP_TO_EDGE); > gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, > GL10.GL_CLAMP_TO_EDGE); > > gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, > GL10.GL_REPLACE); > > InputStream is = mContext.getResources() > .openRawResource(R.drawable.robot); > Bitmap bitmap; > try { > bitmap = BitmapFactory.decodeStream(is); > } finally { > try { > is.close(); > } catch(IOException e) { > // Ignore. > } > } > > GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0); > bitmap.recycle(); > > } > > public void drawFrame(GL10 gl) > { > > /* > * By default, OpenGL enables features that improve quality > * but reduce performance. One might want to tweak that > * especially on software renderer. > */ > gl.glDisable(GL10.GL_DITHER); > > gl.glTexEnvx(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, > GL10.GL_ADD);//GL_SUBTRACT // GL_MODULATE > > /* > * Usually, the first thing one might want to do is to clear > * the screen. The most efficient way of doing this is to use > * glClear(). > */ > > gl.glClear(GL10.GL_COLOR_BUFFER_BIT | > GL10.GL_DEPTH_BUFFER_BIT); > > /* > * Now we're ready to draw some 3D objects > */ > > gl.glMatrixMode(GL10.GL_MODELVIEW); > gl.glLoadIdentity(); > > GLU.gluLookAt(gl, 0, 0, -5, 0f, 0f, 0f, 0f, 1.0f, 0.0f); > > gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); > gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); > > gl.glActiveTexture(GL10.GL_TEXTURE0); > gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureID); > gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, > GL10.GL_REPEAT); > gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, > GL10.GL_REPEAT); > > long time = SystemClock.uptimeMillis() % 4000L; > float angle = 0.090f * ((int) time); > > gl.glRotatef(angle, 0, 0, 1.0f); > > mTriangle.draw(gl); > } > > public void sizeChanged(GL10 gl, int w, int h) { > gl.glViewport(0, 0, w, h); > > /* > * Set our projection matrix. This doesn't have to be done > * each time we draw, but usually a new projection needs to > * be set when the viewport is resized. > */ > > float ratio = (float) w / h; > gl.glMatrixMode(GL10.GL_PROJECTION); > gl.glLoadIdentity(); > gl.glFrustumf(-ratio, ratio, -1, 1, 3, 7); > > } > > private Context mContext; > private Triangle mTriangle; > private int mTextureID; > > } > > class Triangle { > FloatBuffer squareBuff; > public Triangle() { > > // Buffers to be passed to gl*Pointer() functions > // must be direct, i.e., they must be placed on the > // native heap where the garbage collector cannot > // move them. > // > // Buffers with multi-byte datatypes (e.g., short, int, float) > // must have their byte order set to native order > > ByteBuffer vbb = ByteBuffer.allocateDirect(VERTS * 3 * 4); > vbb.order(ByteOrder.nativeOrder()); > mFVertexBuffer = vbb.asFloatBuffer(); > > ByteBuffer tbb = ByteBuffer.allocateDirect(VERTS * 2 * 4); > tbb.order(ByteOrder.nativeOrder()); > mTexBuffer = tbb.asFloatBuffer(); > > ByteBuffer ibb = ByteBuffer.allocateDirect(VERTS * 2); > ibb.order(ByteOrder.nativeOrder()); > mIndexBuffer = ibb.asShortBuffer(); > > // A unit-sided equalateral triangle centered on the origin. > float[] coords = { > // X, Y, Z > -0.5f, -0.25f, 0, > 0.5f, -0.25f, 0, > 0.0f, 0.559016994f, 0 > }; > > float[] square = new float[] { 0.25f, 0.25f, 0.0f, > 0.75f, 0.25f, 0.0f, > 0.25f, 0.75f, 0.0f, > 0.75f, 0.75f, 0.0f }; > > for (int i = 0; i < VERTS; i++) { > for(int j = 0; j < 3; j++) { > mFVertexBuffer.put(coords[i*3+j] * 2.0f); > //float x=coords[i][j][]; > // mFVertexBuffer.put(coords[i*3+j]); > } > } > > for (int i = 0; i < VERTS; i++) { > for(int j = 0; j < 2; j++) > { > mTexBuffer.put(coords[i*3+j] * 2.0f + 0.5f); > } > } > > for(int i = 0; i < VERTS; i++) > { > mIndexBuffer.put((short) i); > } > > mFVertexBuffer.position(0); > mTexBuffer.position(0); > mIndexBuffer.position(0); > > ByteBuffer bb = ByteBuffer.allocateDirect(square.length*4); > bb.order(ByteOrder.nativeOrder()); > squareBuff = bb.asFloatBuffer(); > squareBuff.put(square); > squareBuff.position(0); > > } > > public void draw(GL10 gl) > { > gl.glFrontFace(GL10.GL_CCW); > //gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mFVertexBuffer); > > gl.glEnable(GL10.GL_TEXTURE_2D); > gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTexBuffer); > //gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, VERTS > GL10.GL_UNSIGNED_SHORT, mIndexBuffer); > > //gl.glVertexPointer(size, type, stride, pointer) > //gl.glv > gl.glVertexPointer(3, GL10.GL_FLOAT, 0,squareBuff); > } > > private final static int VERTS = 3; > > private FloatBuffer mFVertexBuffer; > private FloatBuffer mTexBuffer; > private ShortBuffer mIndexBuffer; > > > > }- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. 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