Android Opengl es 实例代码 画球体 圆柱 圆锥

package ro.brite.android.nehe18; import java.nio.FloatBuffer; import java.nio.IntBuffer; import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.opengles.GL10; import ro.brite.android.nehe18.R; 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 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 FloatBuffer lightAmbBfr; private final static FloatBuffer lightDifBfr; private final static FloatBuffer lightPosBfr; private IntBuffer texturesBuffer; private static float xRot; private static float yRot; static float xSpeed; static float ySpeed; private static boolean lighting = true; private static int filter = 0; private static int object; private static GlCube cube; private static GlCylinder cylinder; private static GlDisk disk; private static GlSphere sphere; private static GlCylinder cone; private static GlDisk partialDisk; static { lightAmbBfr = FloatBuffer.wrap(lightAmb); lightDifBfr = FloatBuffer.wrap(lightDif); lightPosBfr = FloatBuffer.wrap(lightPos); cube = new GlCube(1.0f, true, true); cylinder = new GlCylinder(1.0f, 1.0f, 3.0f, 32, 4, true, true); disk = new GlDisk(0.5f, 1.5f, 32, 4, true, true); sphere = new GlSphere(1.3f, 24, 12, true, true); cone = new GlCylinder(1.0f, 0.0f, 3.0f, 32, 4, true, true); partialDisk = new GlDisk(0.5f, 1.5f, 32, 4, (float) (Math.PI / 4), (float) (7 * Math.PI / 4), true, true); } 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.wall); // 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, 0, 0, 0); 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.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); } 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 (lighting) { gl.glEnable(GL10.GL_LIGHTING); } else { gl.glDisable(GL10.GL_LIGHTING); } // position object gl.glTranslatef(0, 0, -6); gl.glRotatef(xRot, 1, 0, 0); gl.glRotatef(yRot, 0, 1, 0); // draw object gl.glColor4f(0.5f, 0.5f, 0.5f, 1.0f); gl.glBindTexture(GL10.GL_TEXTURE_2D, texturesBuffer.get(filter)); switch (object) { case 0: gl.glEnable(GL10.GL_CULL_FACE); gl.glLightModelx(GL10.GL_LIGHT_MODEL_TWO_SIDE, GL10.GL_FALSE); cube.draw(gl); break; case 1: gl.glDisable(GL10.GL_CULL_FACE); gl.glLightModelx(GL10.GL_LIGHT_MODEL_TWO_SIDE, GL10.GL_TRUE); cylinder.draw(gl); break; case 2: gl.glDisable(GL10.GL_CULL_FACE); gl.glLightModelx(GL10.GL_LIGHT_MODEL_TWO_SIDE, GL10.GL_TRUE); disk.draw(gl); break; case 3: gl.glEnable(GL10.GL_CULL_FACE); gl.glLightModelx(GL10.GL_LIGHT_MODEL_TWO_SIDE, GL10.GL_FALSE); sphere.draw(gl); break; case 4: gl.glDisable(GL10.GL_CULL_FACE); gl.glLightModelx(GL10.GL_LIGHT_MODEL_TWO_SIDE, GL10.GL_TRUE); cone.draw(gl); break; case 5: gl.glDisable(GL10.GL_CULL_FACE); gl.glLightModelx(GL10.GL_LIGHT_MODEL_TWO_SIDE, GL10.GL_TRUE); partialDisk.draw(gl); break; } // update rotations xRot += xSpeed; yRot += ySpeed; } 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.glMatrixMode(GL10.GL_PROJECTION); gl.glLoadIdentity(); GLU.gluPerspective(gl, 45.0f, (float)width / (float)height, 1.0f, 100.0f); } public static void toggleLighting() { lighting = !lighting; } public static void switchToNextFilter() { filter = (filter + 1) % 3; } public static void switchToNextObject() { object = (object + 1) % 6; } }