intro.java

这是ACCP的JAVA ppt课件

                doRandom = (type & RAND) != 0;
            }


            public void reset(int w, int h) {
                if (doRandom) {
                    int num = (int) (Math.random() * 5.0);
                    switch (num) {
                        case 0 : type = OVAL; break;
                        case 1 : type = RECT; break;
                        case 2 : type = RECT | WID; break;
                        case 3 : type = RECT | HEI; break;
                        case 4 : type = ARC; break;
                        default : type = OVAL; 
                    }
                }
                shape = null;
                bimg = null;
                extent = 360.0;
                zoom = 2.0;
            }


            public void step(int w, int h) {
                if (bimg == null) {
                    int biw = Surface.bimg.getWidth();
                    int bih = Surface.bimg.getHeight();
                    bimg = new BufferedImage(biw, bih, BufferedImage.TYPE_INT_RGB);
                    Graphics2D big = bimg.createGraphics();
                    big.drawImage(Surface.bimg, 0, 0, null);
                }
                double z = Math.min(w, h) * zoom;
                if ((type & OVAL) != 0) {
                    shape = new Ellipse2D.Double(w/2-z/2,h/2-z/2,z,z);
                } else if ((type & ARC) != 0) {
                    shape = new Arc2D.Double(-100,-100,w+200,h+200,90,extent,Arc2D.PIE);
                    extent -= eIncr;
                } else if ((type & RECT) != 0) {
                    if ((type & WID) != 0) {
                        shape = new Rectangle2D.Double(w/2-z/2,0,z,h);
                    } else if ((type & HEI) != 0) {
                        shape = new Rectangle2D.Double(0,h/2-z/2,w,z);
                    } else {
                        shape = new Rectangle2D.Double(w/2-z/2,h/2-z/2,z,z);
                    }
                }
                zoom += zIncr;
            }


            public void render(int w, int h, Graphics2D g2) {
                g2.clip(shape);
                g2.drawImage(bimg, 0, 0, null);
            }

            public int getBegin() {
                return beginning;
            }

            public int getEnd() {
                return ending;
            }
        } // End CoE class



        /**
         * Dither Dissolve Effect. For each successive step in the animation, 
         * a pseudo-random starting horizontal position is chosen using list, 
         * and then the corresponding points created from xlist and ylist are
         * blacked out for the current "chunk".  The x and y chunk starting
         * positions are each incremented by the associated chunk size, and 
         * this process is repeated for the number of "steps" in the 
         * animation, causing an equal number of pseudo-randomly picked 
         * "blocks" to be blacked out during each step of the animation.
         */
        static class DdE implements Part {

            private int beginning, ending;
            private BufferedImage bimg;
            private Graphics2D big;
            private List list, xlist, ylist;
            private int xeNum, yeNum;    // element number
            private int xcSize, ycSize;  // chunk size
            private int inc;
            private int blocksize;


            public DdE(int beg, int end, int blocksize) {
                this.beginning = beg;
                this.ending = end;
                this.blocksize = blocksize; 
            }

            private void createShuffledLists() {
                int width = bimg.getWidth();
                int height = bimg.getHeight();
                Integer xarray[] = new Integer[width];
                Integer yarray[] = new Integer[height];
                Integer array[] = new Integer[ending - beginning + 1];
                for (int i = 0; i < xarray.length; i++) {
                    xarray[i] = new Integer(i);
                }
                for (int j = 0; j < yarray.length; j++) {
                    yarray[j] = new Integer(j);
                }
                for (int k = 0; k < array.length; k++) {
                    array[k] = new Integer(k);
                } 
                java.util.Collections.shuffle(xlist = Arrays.asList(xarray));
                java.util.Collections.shuffle(ylist = Arrays.asList(yarray));
                java.util.Collections.shuffle(list = Arrays.asList(array));
            }

            public void reset(int w, int h) {
                bimg = null;
            }

            public void step(int w, int h) {
                if (bimg == null) {
                    int biw = Surface.bimg.getWidth();
                    int bih = Surface.bimg.getHeight();
                    bimg = new BufferedImage(biw, bih, BufferedImage.TYPE_INT_RGB);
                    createShuffledLists();
                    big = bimg.createGraphics();
                    big.drawImage(Surface.bimg, 0, 0, null);
                    xcSize = (xlist.size() / (ending - beginning)) + 1;
                    ycSize = (ylist.size() / (ending - beginning)) + 1;
                    xeNum = 0;
                    inc = 0;
                }
                xeNum = xcSize * ((Integer)list.get(inc)).intValue();
                yeNum = -ycSize;
                inc++;
            }


            public void render(int w, int h, Graphics2D g2) {
                big.setColor(black); 

                for (int k = 0; k <= (ending - beginning); k++) {
                    if ((xeNum + xcSize) > xlist.size()) {
                        xeNum = 0;
                    } else {
                        xeNum += xcSize;
                    }
                    yeNum += ycSize;

                    for (int i = xeNum; i < xeNum+xcSize && i < xlist.size(); i++) {
                        for (int j = yeNum; j < yeNum+ycSize && j < ylist.size(); j++) {   
                            int xval = ((Integer)xlist.get(i)).intValue();
                            int yval = ((Integer)ylist.get(j)).intValue();
                            if (((xval % blocksize) == 0) &&
                                ((yval % blocksize) == 0)) {
                                big.fillRect(xval, yval, blocksize, blocksize);
                            }
                        }
                    }
                }
           
                g2.drawImage(bimg, 0, 0, null);
            }

            public int getBegin() {
                return beginning;
            }

            public int getEnd() {
                return ending;
            }
        } // End DdE class


        /**
         * Subimage effect.  Subimage the scene's buffered
         * image then rotate and scale down the subimages.
         */
        static class SiE implements Part {

            private int beginning, ending;
            private BufferedImage bimg;
            private double rIncr, sIncr;
            private double scale, rotate;
            private int siw, sih;
            private Vector subs = new Vector(20);
            private Vector pts = new Vector(20);


            public SiE(int siw, int sih, int beg, int end) {
                this.siw = siw;
                this.sih = sih;
                this.beginning = beg;
                this.ending = end;
                rIncr = 360.0 / (ending - beginning);
                sIncr = 1.0 / (ending - beginning);
            }


            public void reset(int w, int h) {
                scale = 1.0;  
                rotate = 0.0;
                bimg = null;
                subs.clear();
                pts.clear();
            }


            public void step(int w, int h) {
                if (bimg == null) {
                    int biw = Surface.bimg.getWidth();
                    int bih = Surface.bimg.getHeight();
                    bimg = new BufferedImage(biw, bih, BufferedImage.TYPE_INT_RGB);
                    Graphics2D big = bimg.createGraphics();
                    big.drawImage(Surface.bimg, 0, 0, null);
                    for (int x = 0; x < w && scale > 0.0; x+=siw) {
                        int ww = x+siw < w ? siw : w-x;
                        for (int y = 0; y < h; y+=sih) {
                            int hh = y+sih < h ? sih : h-y;
                            subs.addElement(bimg.getSubimage(x,y,ww,hh));    
                            pts.addElement(new Point(x, y));
                        }
                    }
                }
                
                rotate += rIncr;
                scale -= sIncr;
            }


            public void render(int w, int h, Graphics2D g2) {
                AffineTransform saveTx = g2.getTransform();
                g2.setColor(blue);
                for (int i = 0; i < subs.size() && scale > 0.0; i++) {
                    BufferedImage bi = (BufferedImage) subs.get(i);
                    Point p = (Point) pts.get(i);
                    int ww = bi.getWidth();
                    int hh = bi.getHeight();
                    AffineTransform at = new AffineTransform();
                    at.rotate(Math.toRadians(rotate), p.x+ww/2, p.y+hh/2); 
                    at.translate(p.x, p.y);
                    at.scale(scale, scale);

                    Rectangle b1 = new Rectangle(0, 0, ww, hh);
                    Shape shape = at.createTransformedShape(b1);
                    Rectangle2D b2 = shape.getBounds2D();
                    double xx = (p.x+ww/2) - (b2.getX()+b2.getWidth()/2);
                    double yy = (p.y+hh/2) - (b2.getY()+b2.getHeight()/2);
                    AffineTransform toCenterAT = new AffineTransform();
                    toCenterAT.translate(xx, yy);
                    toCenterAT.concatenate(at);

                    g2.setTransform(toCenterAT);
                    g2.drawImage(bi, 0, 0, null);
                    g2.draw(b1);
                }
                g2.setTransform(saveTx);
            }

            public int getBegin() {
                return beginning;
            }

            public int getEnd() {
                return ending;
            }
        } // End SiE class




        /**
         * Line Effect.  Flattened ellipse with lines from the center 
         * to the edge.  Expand or collapse the ellipse.  Fade in or out 
         * the lines.
         */
        static class LnE implements Part {

            static final int INC  = 1;
            static final int DEC  = 2;
            static final int R    = 4;              // rotate
            static final int RI   = R | INC;
            static final int RD   = R | DEC;
            static final int ZOOM   = 8;            // zoom
            static final int ZOOMI  = ZOOM | INC;
            static final int ZOOMD  = ZOOM | DEC;    
            static final int AC   = 32;             // AlphaComposite
            static final int ACI   = 32 | INC;
            static final int ACD   = 32 | DEC; 
            private int beginning, ending;
            private double rIncr, rotate;
            private double zIncr, zoom;
            private Vector pts = new Vector();
            private float alpha, aIncr;
            private int type;


            public LnE(int type, int beg, int end) {
                this.type = type;
                this.beginning = beg;
                this.ending = end;
                rIncr = 360.0 / (ending - beginning);
                aIncr = 0.9f / (ending - beginning);
                zIncr = 2.0 / (ending - beginning);
                if ((type & DEC) != 0) {
                    rIncr = -rIncr;
                    aIncr = -aIncr;
                    zIncr = -zIncr;
                }
            }


            public void generatePts(int w, int h, double sizeF) {
                pts.clear();
                double size = Math.min(w, h) * sizeF;
                Ellipse2D ellipse = new Ellipse2D.Double(w/2-size/2,h/2-size/2,size,size);
                PathIterator pi = ellipse.getPathIterator(null, 0.8);
                while ( !pi.isDone() ) {
                    double[] pt = new double[6];
                    switch ( pi.currentSegment(pt) ) {
                        case FlatteningPathIterator.SEG_MOVETO:
                        case FlatteningPathIterator.SEG_LINETO:
                            pts.addElement(new Point2D.Double(pt[0], pt[1]));
                    }
                    pi.next();
                }
            }


            public void reset(int w, int h) {
                if ((type & DEC) != 0) {
                    rotate = 360;
                    alpha = 1.0f;
                    zoom = 2.0;