nehe-android

package ro.brite.android.nehe16; import java.nio.FloatBuffer; import java.nio.IntBuffer; import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.opengles.GL10; import ro.brite.android.opengl.R; import ro.brite.android.opengl.common.Utils; import android.content.Context; import android.graphics.Bitmap; import android.opengl.GLU; import android.opengl.GLUtils; import android.opengl.GLSurfaceView.Renderer; public class GlRenderer implements Renderer { private Context context; public GlRenderer(Context context) { this.context = context; } private final static float[][] cubeVertexCoords = new float[][] { new float[] { // top 1, 1,-1, -1, 1,-1, -1, 1, 1, 1, 1, 1 }, new float[] { // bottom 1,-1, 1, -1,-1, 1, -1,-1,-1, 1,-1,-1 }, new float[] { // front 1, 1, 1, -1, 1, 1, -1,-1, 1, 1,-1, 1 }, new float[] { // back 1,-1,-1, -1,-1,-1, -1, 1,-1, 1, 1,-1 }, new float[] { // left -1, 1, 1, -1, 1,-1, -1,-1,-1, -1,-1, 1 }, new float[] { // right 1, 1,-1, 1, 1, 1, 1,-1, 1, 1,-1,-1 }, }; private final static float[][] cubeNormalCoords = new float[][] { new float[] { // top 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0 }, new float[] { // bottom 0,-1, 0, 0,-1, 0, 0,-1, 0, 0,-1, 0 }, new float[] { // front 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1 }, new float[] { // back 0, 0,-1, 0, 0,-1, 0, 0,-1, 0, 0,-1 }, new float[] { // left -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0 }, new float[] { // right 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0 }, }; private final static float[][] cubeTextureCoords = new float[][] { new float[] { // top 1, 0, 1, 1, 0, 1, 0, 0 }, new float[] { // bottom 0, 0, 1, 0, 1, 1, 0, 1 }, new float[] { // front 1, 1, 0, 1, 0, 0, 1, 0 }, new float[] { // back 0, 1, 0, 0, 1, 0, 1, 1 }, new float[] { // left 1, 1, 0, 1, 0, 0, 1, 0 }, new float[] { // right 0, 1, 0, 0, 1, 0, 1, 1 }, }; private final static float lightAmb[]= { 0.5f, 0.5f, 0.5f, 1.0f }; private final static float lightDif[]= { 1.0f, 1.0f, 1.0f, 1.0f }; private final static float lightPos[]= { 0.0f, 0.0f, 2.0f, 1.0f }; private final static float fogColor[] = { 0.5f, 0.5f, 0.5f, 1.0f }; private final static int fogMode[]= { GL10.GL_EXP, GL10.GL_EXP2, GL10.GL_LINEAR }; private final static FloatBuffer[] cubeVertexBfr; private final static FloatBuffer[] cubeNormalBfr; private final static FloatBuffer[] cubeTextureBfr; private final static FloatBuffer lightAmbBfr; private final static FloatBuffer lightDifBfr; private final static FloatBuffer lightPosBfr; private final static FloatBuffer fogColorBfr; private IntBuffer texturesBuffer; static final SceneState sceneState; private long lastMillis; static { cubeVertexBfr = new FloatBuffer[6]; cubeNormalBfr = new FloatBuffer[6]; cubeTextureBfr = new FloatBuffer[6]; for (int i = 0; i < 6; i++) { cubeVertexBfr[i] = FloatBuffer.wrap(cubeVertexCoords[i]); cubeNormalBfr[i] = FloatBuffer.wrap(cubeNormalCoords[i]); cubeTextureBfr[i] = FloatBuffer.wrap(cubeTextureCoords[i]); } lightAmbBfr = FloatBuffer.wrap(lightAmb); lightDifBfr = FloatBuffer.wrap(lightDif); lightPosBfr = FloatBuffer.wrap(lightPos); fogColorBfr = FloatBuffer.wrap(fogColor); sceneState = new SceneState(); } private void LoadTextures(GL10 gl) { // create textures gl.glEnable(GL10.GL_TEXTURE_2D); texturesBuffer = IntBuffer.allocate(3); gl.glGenTextures(3, texturesBuffer); // load bitmap Bitmap texture = Utils.getTextureFromBitmapResource(context, R.drawable.nehe_texture_crate); // setup texture 0 gl.glBindTexture(GL10.GL_TEXTURE_2D, texturesBuffer.get(0)); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_NEAREST); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, texture, 0); // setup texture 1 gl.glBindTexture(GL10.GL_TEXTURE_2D, texturesBuffer.get(1)); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, texture, 0); // setup texture 2 gl.glBindTexture(GL10.GL_TEXTURE_2D, texturesBuffer.get(2)); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR_MIPMAP_NEAREST); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); Utils.generateMipmapsForBoundTexture(texture); // free bitmap texture.recycle(); } public void onSurfaceCreated(GL10 gl, EGLConfig config) { gl.glShadeModel(GL10.GL_SMOOTH); gl.glClearColor(0.5f, 0.5f, 0.5f, 1.0f); gl.glClearDepthf(1.0f); gl.glEnable(GL10.GL_DEPTH_TEST); gl.glDepthFunc(GL10.GL_LEQUAL); gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST); gl.glEnable(GL10.GL_CULL_FACE); gl.glCullFace(GL10.GL_BACK); // lighting gl.glEnable(GL10.GL_LIGHT0); gl.glLightfv(GL10.GL_LIGHT0, GL10.GL_AMBIENT, lightAmbBfr); gl.glLightfv(GL10.GL_LIGHT0, GL10.GL_DIFFUSE, lightDifBfr); gl.glLightfv(GL10.GL_LIGHT0, GL10.GL_POSITION, lightPosBfr); // fog gl.glFogfv(GL10.GL_FOG_COLOR, fogColorBfr); gl.glFogf(GL10.GL_FOG_DENSITY, 0.35f); gl.glHint(GL10.GL_FOG_HINT, GL10.GL_DONT_CARE); gl.glFogf(GL10.GL_FOG_START, 2.0f); gl.glFogf(GL10.GL_FOG_END, 6.0f); gl.glEnable(GL10.GL_FOG); } public void onDrawFrame(GL10 gl) { gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); gl.glMatrixMode(GL10.GL_MODELVIEW); gl.glLoadIdentity(); // update lighting if (sceneState.lighting) { gl.glEnable(GL10.GL_LIGHTING); } else { gl.glDisable(GL10.GL_LIGHTING); } // update fog gl.glFogx(GL10.GL_FOG_MODE, fogMode[sceneState.fogFilter]); // draw cube gl.glTranslatef(0, 0, -6); sceneState.rotateModel(gl); gl.glBindTexture(GL10.GL_TEXTURE_2D, texturesBuffer.get(sceneState.filter)); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glEnableClientState(GL10.GL_NORMAL_ARRAY); gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); for (int i = 0; i < 6; i++) // draw each face { gl.glVertexPointer(3, GL10.GL_FLOAT, 0, cubeVertexBfr[i]); gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, cubeTextureBfr[i]); gl.glNormalPointer(GL10.GL_FLOAT, 0, cubeNormalBfr[i]); gl.glDrawArrays(GL10.GL_TRIANGLE_FAN, 0, 4); } gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); gl.glDisableClientState(GL10.GL_NORMAL_ARRAY); gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY); // get current millis long currentMillis = System.currentTimeMillis(); // update rotations if (lastMillis != 0) { long delta = currentMillis - lastMillis; sceneState.dx += sceneState.dxSpeed * delta; sceneState.dy += sceneState.dySpeed * delta; sceneState.dampenSpeed(delta); } // update millis lastMillis = currentMillis; } public void onSurfaceChanged(GL10 gl, int width, int height) { // reload textures LoadTextures(gl); // avoid division by zero if (height == 0) height = 1; // draw on the entire screen gl.glViewport(0, 0, width, height); // setup projection matrix gl.glMatrixMod