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Diffstat (limited to 'src/com/nea/nehe/lesson16/Lesson16.java')
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1 files changed, 366 insertions, 0 deletions
diff --git a/src/com/nea/nehe/lesson16/Lesson16.java b/src/com/nea/nehe/lesson16/Lesson16.java new file mode 100644 index 0000000..0109305 --- /dev/null +++ b/src/com/nea/nehe/lesson16/Lesson16.java @@ -0,0 +1,366 @@ +/* + * Authors Name: Jeff Molofee (NeHe) + * + * Disclaimer: + * This program may crash your system or run poorly depending on your + * hardware. The program and code contained in this archive was scanned + * for virii and has passed all test before it was put online. If you + * use this code in project of your own, send a shout out to the author! + * + * Ported to Android by INsanityDesign: + * http://insanitydesign.com/wp/projects/nehe-android-ports/ + * + * Adapted by 0xlab developers. + */ + +package com.nea.nehe.lesson16; + +import org.zeroxlab.benchmark.Tester; + +import java.nio.ByteBuffer; +import java.nio.ByteOrder; +import java.nio.FloatBuffer; + +import javax.microedition.khronos.egl.EGLConfig; +import javax.microedition.khronos.opengles.GL10; + +import android.content.Context; +import android.opengl.GLSurfaceView; +import android.opengl.GLU; +import android.opengl.GLSurfaceView.Renderer; +import android.view.KeyEvent; +import android.view.MotionEvent; + +/** + * This is a port of the {@link http://nehe.gamedev.net} OpenGL + * tutorials to the Android 1.5 OpenGL ES platform. Thanks to + * NeHe and all contributors for their great tutorials and great + * documentation. This source should be used together with the + * textual explanations made at {@link http://nehe.gamedev.net}. + * The code is based on the original Visual C++ code with all + * comments made. It has been altered and extended to meet the + * Android requirements. The Java code has according comments. + * + * If you use this code or find it helpful, please visit and send + * a shout to the author under {@link http://www.insanitydesign.com/} + * + * @DISCLAIMER + * This source and the whole package comes without warranty. It may or may + * not harm your computer or cell phone. Please use with care. Any damage + * cannot be related back to the author. The source has been tested on a + * virtual environment and scanned for viruses and has passed all tests. + * + * + * This is an interpretation of "Lesson 16: Cool Looking Fog" + * for the Google Android platform. + * + * @author Savas Ziplies (nea/INsanityDesign) + */ +public class Lesson16 extends GLSurfaceView implements Renderer { + + private Tester mTester; + + /** Cube instance */ + private Cube cube; + + /* Rotation values */ + private float xrot; //X Rotation + private float yrot; //Y Rotation + + /* Rotation speed values */ + private float xspeed; //X Rotation Speed + private float yspeed; //Y Rotation Speed + + private float z = -5.0f; //Depth Into The Screen + + private int filter = 0; //Which texture filter? + + /** Is light enabled */ + private boolean light = false; + + private int fogFilter = 0; //Which Fog To Use ( NEW ) + /* + * Init the three fog filters we will use + * and the fog color ( NEW ) + */ + private int fogMode[]= { + GL10.GL_EXP, + GL10.GL_EXP2, + GL10.GL_LINEAR + }; + private float[] fogColor = {0.5f, 0.5f, 0.5f, 1.0f}; + private FloatBuffer fogColorBuffer; //The Fog Color Buffer ( NEW ) + + /* + * The initial light values for ambient and diffuse + * as well as the light position + */ + private float[] lightAmbient = {0.5f, 0.5f, 0.5f, 1.0f}; + private float[] lightDiffuse = {1.0f, 1.0f, 1.0f, 1.0f}; + private float[] lightPosition = {0.0f, 0.0f, 2.0f, 1.0f}; + + /* The buffers for our light values */ + private FloatBuffer lightAmbientBuffer; + private FloatBuffer lightDiffuseBuffer; + private FloatBuffer lightPositionBuffer; + + /* + * These variables store the previous X and Y + * values as well as a fix touch scale factor. + * These are necessary for the rotation transformation + * added to this lesson, based on the screen touches. + */ + private float oldX; + private float oldY; + private final float TOUCH_SCALE = 0.2f; //Proved to be good for normal rotation + + /** The Activity Context */ + private Context context; + + /** + * Instance the Cube object and set the Activity Context + * handed over. Initiate the light and fog buffers and set + * this class as renderer for this now GLSurfaceView. + * Request Focus and set if focusable in touch mode to + * receive the Input from Screen and Buttons + * + * @param context - The Activity Context + */ + public Lesson16(Context context) { + super(context); + + //Set this as Renderer + this.setRenderer(this); + //Request focus, otherwise buttons won't react + this.requestFocus(); + this.setFocusableInTouchMode(true); + + // + this.context = context; + + // + ByteBuffer byteBuf = ByteBuffer.allocateDirect(lightAmbient.length * 4); + byteBuf.order(ByteOrder.nativeOrder()); + lightAmbientBuffer = byteBuf.asFloatBuffer(); + lightAmbientBuffer.put(lightAmbient); + lightAmbientBuffer.position(0); + + byteBuf = ByteBuffer.allocateDirect(lightDiffuse.length * 4); + byteBuf.order(ByteOrder.nativeOrder()); + lightDiffuseBuffer = byteBuf.asFloatBuffer(); + lightDiffuseBuffer.put(lightDiffuse); + lightDiffuseBuffer.position(0); + + byteBuf = ByteBuffer.allocateDirect(lightPosition.length * 4); + byteBuf.order(ByteOrder.nativeOrder()); + lightPositionBuffer = byteBuf.asFloatBuffer(); + lightPositionBuffer.put(lightPosition); + lightPositionBuffer.position(0); + + //Build the new Buffer ( NEW ) + byteBuf = ByteBuffer.allocateDirect(fogColor.length * 4); + byteBuf.order(ByteOrder.nativeOrder()); + fogColorBuffer = byteBuf.asFloatBuffer(); + fogColorBuffer.put(fogColor); + fogColorBuffer.position(0); + + // + cube = new Cube(); + } + + public void setSpeedAndTester(int speedX, int speedY, Tester tester) { + xspeed = speedX; + yspeed = speedY; + mTester = tester; + } + + /** + * The Surface is created/init() + */ + public void onSurfaceCreated(GL10 gl, EGLConfig config) { + //And there'll be light! + gl.glLightfv(GL10.GL_LIGHT0, GL10.GL_AMBIENT, lightAmbientBuffer); //Setup The Ambient Light + gl.glLightfv(GL10.GL_LIGHT0, GL10.GL_DIFFUSE, lightDiffuseBuffer); //Setup The Diffuse Light + gl.glLightfv(GL10.GL_LIGHT0, GL10.GL_POSITION, lightPositionBuffer); //Position The Light + gl.glEnable(GL10.GL_LIGHT0); //Enable Light 0 + + //Settings + gl.glDisable(GL10.GL_DITHER); //Disable dithering + gl.glEnable(GL10.GL_TEXTURE_2D); //Enable Texture Mapping + gl.glShadeModel(GL10.GL_SMOOTH); //Enable Smooth Shading + gl.glClearColor(0.5f, 0.5f, 0.5f, 1.0f); //We'll Clear To The Color Of The Fog ( Modified ) + gl.glClearDepthf(1.0f); //Depth Buffer Setup + gl.glEnable(GL10.GL_DEPTH_TEST); //Enables Depth Testing + gl.glDepthFunc(GL10.GL_LEQUAL); //The Type Of Depth Testing To Do + + //The Fog/The Mist + gl.glFogf(GL10.GL_FOG_MODE, fogMode[fogFilter]); //Fog Mode ( NEW ) + gl.glFogfv(GL10.GL_FOG_COLOR, fogColorBuffer); //Set Fog Color ( NEW ) + gl.glFogf(GL10.GL_FOG_DENSITY, 0.35f); //How Dense Will The Fog Be ( NEW ) + gl.glHint(GL10.GL_FOG_HINT, GL10.GL_DONT_CARE); //Fog Hint Value ( NEW ) + gl.glFogf(GL10.GL_FOG_START, 1.0f); //Fog Start Depth ( NEW ) + gl.glFogf(GL10.GL_FOG_END, 5.0f); //Fog End Depth ( NEW ) + gl.glEnable(GL10.GL_FOG); //Enables GL_FOG ( NEW ) + + //Really Nice Perspective Calculations + gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST); + + //Load the texture for the cube once during Surface creation + cube.loadGLTexture(gl, this.context); + } + + /** + * Here we do our drawing + */ + public void onDrawFrame(GL10 gl) { + //Clear Screen And Depth Buffer + gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); + gl.glLoadIdentity(); //Reset The Current Modelview Matrix + + //Check if the light flag has been set to enable/disable lighting + if(light) { + gl.glEnable(GL10.GL_LIGHTING); + } else { + gl.glDisable(GL10.GL_LIGHTING); + } + + //Set Fog Mode ( NEW ) + gl.glFogf(GL10.GL_FOG_MODE, fogMode[fogFilter]); + + //Drawing + gl.glTranslatef(0.0f, 0.0f, z); //Move z units into the screen + gl.glScalef(0.8f, 0.8f, 0.8f); //Scale the Cube to 80 percent, otherwise it would be too large for the screen + + //Rotate around the axis based on the rotation matrix (rotation, x, y, z) + gl.glRotatef(xrot, 1.0f, 0.0f, 0.0f); //X + gl.glRotatef(yrot, 0.0f, 1.0f, 0.0f); //Y + + cube.draw(gl, filter); //Draw the Cube + + gl.glFinish(); // ensuer the previous gl commands complete + mTester.decreaseCounter(); + + //Change rotation factors + xrot += xspeed; + yrot += yspeed; + } + + /** + * If the surface changes, reset the view + */ + public void onSurfaceChanged(GL10 gl, int width, int height) { + if(height == 0) { //Prevent A Divide By Zero By + height = 1; //Making Height Equal One + } + + gl.glViewport(0, 0, width, height); //Reset The Current Viewport + gl.glMatrixMode(GL10.GL_PROJECTION); //Select The Projection Matrix + gl.glLoadIdentity(); //Reset The Projection Matrix + + //Calculate The Aspect Ratio Of The Window + GLU.gluPerspective(gl, 45.0f, (float)width / (float)height, 0.1f, 100.0f); + + gl.glMatrixMode(GL10.GL_MODELVIEW); //Select The Modelview Matrix + gl.glLoadIdentity(); //Reset The Modelview Matrix + } + +/* ***** Listener Events ***** */ + /** + * Override the key listener to receive keyUp events. + * + * Check for the DPad presses left, right, up, down and middle. + * Change the rotation speed according to the presses + * or change the texture filter used through the middle press. + */ + @Override + public boolean onKeyUp(int keyCode, KeyEvent event) { + // + if(keyCode == KeyEvent.KEYCODE_DPAD_LEFT) { + yspeed -= 0.1f; + + } else if(keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) { + yspeed += 0.1f; + + } else if(keyCode == KeyEvent.KEYCODE_DPAD_UP) { + xspeed -= 0.1f; + + } else if(keyCode == KeyEvent.KEYCODE_DPAD_DOWN) { + xspeed += 0.1f; + + } else if(keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { + filter += 1; + if(filter > 2) { + filter = 0; + } + } + + //We handled the event + return true; + } + + /** + * Override the touch screen listener. + * + * React to moves and presses on the touchscreen. + */ + @Override + public boolean onTouchEvent(MotionEvent event) { + // + float x = event.getX(); + float y = event.getY(); + + //If a touch is moved on the screen + if(event.getAction() == MotionEvent.ACTION_MOVE) { + //Calculate the change + float dx = x - oldX; + float dy = y - oldY; + //Define an upper area of 10% on the screen + int upperArea = this.getHeight() / 10; + + //Zoom in/out if the touch move has been made in the upper + if(y < upperArea) { + z -= dx * TOUCH_SCALE / (this.getWidth() /16); + + //Rotate around the axis otherwise + } else { + xrot += dy * TOUCH_SCALE; + yrot += dx * TOUCH_SCALE; + } + + //A press on the screen + } else if(event.getAction() == MotionEvent.ACTION_UP) { + //Define an upper area of 10% to define a lower area + int upperArea = this.getHeight() / 10; + int lowerArea = this.getHeight() - upperArea; + + // + if(y > lowerArea) { + //Change the blend setting if the lower area left has been pressed + if(x < (this.getWidth() / 2)) { + fogFilter += 1; //Increase fogFilter By One ( NEW ) + + //Is fogFilter Greater Than 2? ( NEW ) + if(fogFilter > 2) { + fogFilter = 0; //If So, Set fogFilter To Zero back again ( NEW ) + } + + //Change the light setting if the lower area right has been pressed + } else { + if(light) { + light = false; + } else { + light = true; + } + } + } + } + + //Remember the values + oldX = x; + oldY = y; + + //We handled the event + return true; + } +} + |