import java.applet.Applet; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.Graphics; import java.awt.Image; import net.java2000.tools.NoNull; /** * 一段眼睛跟着鼠标转动的跟踪眼代码。<br> * 你可以单独运行，或者放在html里面<br> * <applet code="Eye" codebase="codebase" width="400" height="135" * name="eyesApplet"><br> * <param name="faceFile" value="doofus.jpg"/><br> * <param name="testMode" value="false"/> <br> * <param name="leftEyeX" value="75"/> <br> * <param name="leftEyeY" value="77"/> <br> * <param name="rightEyeX" value="310"/> <br> * <param name="rightEyeY" value="75"/><br> * <param name="irisRadius" value="20"/> <br> * <param name="pupilRadius" value="8"/><br> * <param name="leftEyeRadius" value="5"/><br> * <param name="rightEyeRadius" value="5"/> <br> * <param name="horizontalSkew" value="3.5"/><br> * <param name="eyeIndependence" value="0.4"/> <br> * <param name="irisRed" value="128"/><br> * <param name="irisGreen" value="64"/> <br> * <param name="irisBlue" value="0"/> <br> * <param name="verticalOffset" value="100"/> <br> * </applet> * * @author 赵学庆，Java世纪网(java2000.net) * */ public class Eye extends Applet { private static final long serialVersionUID = 4124530672062457469L; private String mErrorMessage; private Image mFace; private Color mIrisColor, mPupilColor = Color.black; private int mMouseX, mMouseY; private int mLeftEyeX, mLeftEyeY, mRightEyeX, mRightEyeY; private int mLeftIrisX, mLeftIrisY, mRightIrisX, mRightIrisY; private int mLeftPupilX, mLeftPupilY, mRightPupilX, mRightPupilY; private int mIrisRadius, mPupilRadius; private int mLeftEyeRadius, mRightEyeRadius, mLeftPupilTR, mRightPupilTR; private int mVerticalOffset; // 默认值 private int mFaceX = 0, mFaceY = 0; // image start at 0, 0 private int mIrisRed = 128, mIrisGreen = 64, mIrisBlue = 0; private double mHorizontalSkew = 3.5, mEyeIndependence = 0.5, mGapFactor = 1.5; private boolean mTestMode = false; private Dimension mDimension; private Image mImage; private Graphics mGraphics; public void init() { mErrorMessage = null; try { // 设置的一些参数 // 背景的面部图片 mFace = getImage(getCodeBase(), NoNull.toString(getParameter("faceFile"), "doofus.jpg")); // 左侧眼睛的x坐标 mLeftEyeX = mLeftIrisX = mLeftPupilX = Integer.parseInt(NoNull.toString( getParameter("leftEyeX"), "75")); // 左侧眼睛的y坐标 mLeftEyeY = mLeftIrisY = mLeftPupilY = Integer.parseInt(NoNull.toString( getParameter("leftEyeY"), "77")); // 右侧眼睛的x坐标 mRightEyeX = mRightIrisX = mRightPupilX = Integer.parseInt(NoNull.toString( getParameter("rightEyeX"), "310")); // 右侧眼睛的y坐标 mRightEyeY = mRightIrisY = mRightPupilY = Integer.parseInt(NoNull.toString( getParameter("rightEyeY"), "75")); // 眼睛的白眼球半径 mIrisRadius = Integer.parseInt(NoNull.toString(getParameter("irisRadius"), "20")); // 眼睛的瞳孔半径 mPupilRadius = Integer.parseInt(NoNull.toString(getParameter("pupilRadius"), "8")); // 左眼睛的移动半径 mLeftEyeRadius = Integer.parseInt(NoNull.toString(getParameter("leftEyeRadius"), "15")); // 右眼睛的移动半径 mRightEyeRadius = Integer.parseInt(NoNull.toString(getParameter("rightEyeRadius"), "5")); // 可选参数 if (getParameter("testMode") != null) mTestMode = Boolean.valueOf(NoNull.toString(getParameter("testMode"), "true")) .booleanValue(); if (getParameter("horizontalSkew") != null) mHorizontalSkew = Double.valueOf( NoNull.toString(getParameter("horizontalSkew"), "13.5")).doubleValue(); if (getParameter("eyeIndependence") != null) mEyeIndependence = Double.valueOf( NoNull.toString(getParameter("eyeIndependence"), "0.4")).doubleValue(); if (getParameter("irisRed") != null) mIrisRed = Integer.parseInt(NoNull.toString(getParameter("irisRed"), "128")); if (getParameter("irisGreen") != null) mIrisGreen = Integer.parseInt(NoNull.toString(getParameter("irisGreen"), "64")); if (getParameter("irisBlue") != null) mIrisBlue = Integer.parseInt(NoNull.toString(getParameter("irisBlue"), "0")); mIrisColor = new Color(mIrisRed, mIrisGreen, mIrisBlue); if (getParameter("verticalOffset") != null) mVerticalOffset = Integer.parseInt(NoNull.toString(getParameter("verticalOffset"), "100")); } catch (Exception e) { mErrorMessage = "Bad or missing required parameter."; e.printStackTrace(); } // 计算眼球的移动半径 mLeftPupilTR = mLeftEyeRadius + mIrisRadius - (int) (mGapFactor * mPupilRadius); mRightPupilTR = mRightEyeRadius + mIrisRadius - (int) (mGapFactor * mPupilRadius); // 侦听鼠标事件 MouseMotion aMouseMotion = new MouseMotion(); this.addMouseMotionListener(aMouseMotion); this.setSize(400, 135); } public void paintFrame(Graphics g) { if (mErrorMessage != null) { showError(g); return; } // 背景面部 g.drawImage(mFace, mFaceX, mFaceY, this); // 画外部的球体 g.setColor(mIrisColor); g.fillOval(mLeftIrisX - mIrisRadius, mLeftIrisY - mIrisRadius, 2 * mIrisRadius, 2 * mIrisRadius); g.fillOval(mRightIrisX - mIrisRadius, mRightIrisY - mIrisRadius, 2 * mIrisRadius, 2 * mIrisRadius); // 画瞳孔 g.setColor(mPupilColor); g.fillOval(mLeftPupilX - mPupilRadius, mLeftPupilY - mPupilRadius, 2 * mPupilRadius, 2 * mPupilRadius); g.fillOval(mRightPupilX - mPupilRadius, mRightPupilY - mPupilRadius, 2 * mPupilRadius, 2 * mPupilRadius); if (mTestMode) { g.drawOval(mLeftEyeX - mLeftEyeRadius, mLeftEyeY - mLeftEyeRadius, 2 * mLeftEyeRadius, 2 * mLeftEyeRadius); g.drawOval(mRightEyeX - mRightEyeRadius, mRightEyeY - mRightEyeRadius, 2 * mRightEyeRadius, 2 * mRightEyeRadius); } } public void mouseMoved() { // coordinates for the left iris int leftDX = mMouseX - mLeftEyeX; int leftDY = mMouseY - mLeftEyeY; if (leftDY == 0) leftDY = 1; // prevent divide by zero double leftDXDY = (double) leftDX / leftDY; double leftdy = Math.sqrt(Math.pow(mLeftEyeRadius, 2) / (Math.pow(leftDXDY, 2) + 1)); if (leftDY < 0) { leftdy = -leftdy; } double leftdx = leftDXDY * leftdy * mHorizontalSkew; // coordinates for the right iris int rightDX = mMouseX - mRightEyeX; int rightDY = mMouseY - mRightEyeY; if (rightDY == 0) rightDY = 1; // prevent divide by zero double rightDXDY = (double) rightDX / rightDY; double rightdy = Math.sqrt(Math.pow(mRightEyeRadius, 2) / (Math.pow(rightDXDY, 2) + 1)); if (rightDY < 0) { rightdy = -rightdy; } double rightdx = rightDXDY * rightdy * mHorizontalSkew; // adjustments for the irises double avedx = (rightdx + leftdx) / 2; double avedy = (rightdy + leftdy) / 2; leftdx = leftdx + (avedx - leftdx) * (1 - mEyeIndependence); rightdx = rightdx + (avedx - rightdx) * (1 - mEyeIndependence); leftdy = leftdy + (avedy - leftdy) * (1 - mEyeIndependence); rightdy = rightdy + (avedy - rightdy) * (1 - mEyeIndependence); // new iris positions mLeftIrisX = mLeftEyeX + (int) leftdx; mLeftIrisY = mLeftEyeY + (int) leftdy; mRightIrisX = mRightEyeX + (int) rightdx; mRightIrisY = mRightEyeY + (int) rightdy; // coordinates for the left pupil double leftpdy = Math.sqrt(Math.pow(mLeftPupilTR, 2) / (Math.pow(leftDXDY, 2) + 1)); if (leftDY < 0) { leftpdy = -leftpdy; } double leftpdx = leftDXDY * leftpdy * (mHorizontalSkew - mGapFactor); // coordinates for the right pupil double rightpdy = Math.sqrt(Math.pow(mRightPupilTR, 2) / (Math.pow(rightDXDY, 2) + 1)); if (rightDY < 0) { rightpdy = -rightpdy; } double rightpdx = rightDXDY * rightpdy * (mHorizontalSkew - mGapFactor); // adjustments for the pupils double avepdx = (rightpdx + leftpdx) / 2; double avepdy = (rightpdy + leftpdy) / 2; leftpdx = leftpdx + (avepdx - leftpdx) * (1 - mEyeIndependence); rightpdx = rightpdx + (avepdx - rightpdx) * (1 - mEyeIndependence); leftpdy = leftpdy + (avepdy - leftpdy) * (1 - mEyeIndependence); rightpdy = rightpdy + (avepdy - rightpdy) * (1 - mEyeIndependence); // new pupil positions mLeftPupilX = mLeftEyeX + (int) leftpdx; mLeftPupilY = mLeftEyeY + (int) leftpdy; mRightPupilX = mRightEyeX + (int) rightpdx; mRightPupilY = mRightEyeY + (int) rightpdy; repaint(); } public void update(Graphics g) { paint(g); } public void paint(Graphics g) { Dimension d = getSize(); // create the offscreen graphics context if ((mGraphics == null) || (d.width != mDimension.width) || (d.height != mDimension.height)) { mDimension = d; mImage = createImage(d.width, d.height); mGraphics = mImage.getGraphics(); } // erase the previous image mGraphics.setColor(getBackground()); mGraphics.fillRect(0, 0, d.width, d.height); mGraphics.setColor(Color.black); // paint the frame into the image paintFrame(mGraphics); // paint the image onto the screen g.drawImage(mImage, 0, 0, null); } class MouseMotion extends java.awt.event.MouseMotionAdapter { public void mouseMoved(java.awt.event.MouseEvent event) { Object object = event.getSource(); if (object == Eye.this) mouseMovedInApplet(event); } } void mouseMovedInApplet(java.awt.event.MouseEvent event) { // get the mouse coords mMouseX = event.getX(); mMouseY = event.getY(); mouseMoved(); } public void mouseMovedInBrowser(int x, int y, int windowWidth) { int appletW = getSize().width; // adjust mouse x and y relative to applet position mMouseX = x - (windowWidth - appletW) / 2; mMouseY = y - mVerticalOffset; mouseMoved(); } private void showError(Graphics g) { g.setFont(new Font("TimesRoman", Font.BOLD, 12)); g.drawString(mErrorMessage, 10, 20); } }