001: //File: FishWinks.java
002: //Uses: DrawingObjectList.java
003: //Uses: FlipBook.java
004:
005: /* This is a simple object-list and flip-book based
006: drawing of a fish swimming across the screen and
007: and winking when his/her eye is at the middle
008: of the screen.
009:
010: Note that the fish is to swim from the right to
011: the left.
012:
013: H. J. Bernstein, 29 November 2003
014:
015: */
016:
017:
018: import java.awt.*;
019: import java.awt.event.*;
020: import java.awt.image.*;
021: import java.applet.Applet;
022:
023: public class FishWinks extends Applet
024: {
025: // Global data
026: DrawingObjectList dol = null;
027:
028: // Initialization
029: public void init() {
030: dol = null;
031: }
032:
033:
034: // paint method to to the actual drawing
035: public void paint (Graphics g_real) {
036:
037: // declare variables
038: Graphics g; // a graphics object
039: Dimension size // dimensions of the window
040: = getSize();
041: int frame; // the current frame
042: int frames; // the total number of frames
043: int cx = size.width,
044: cy = size.height,
045: diameter = (int)(.2*Math.min(cx, cy));
046: int ii;
047: int shift;
048: int rshift;
049: Color bodycolor = Color.yellow; // yellow body
050: Color seacolor = new Color(128,128,255); // light blue sea
051: Color linecolor = Color.red; // red line color
052:
053: frames = (int)(cx+diameter*4.0);
054:
055: // If the DOL exists and is the right size
056: // use the pages we already created.
057:
058: if (dol == null
059: || dol.curFrames != frames
060: || dol.curWidth != cx
061: || dol.curHeight != cy ) {
062:
063: dol = new DrawingObjectList(g_real,cx,cy, this, frames);
064:
065: // draw some waves
066: dol.setColor(seacolor,0,frames-1);
067: // first fill the background with blue to the tops of the wave2
068: dol.fillRect(0,diameter/2,cx-1,cy-1-diameter/2,0,frames-1);
069: // now change to white and cut out the waves
070: dol.setColor(Color.white,0,frames-1);
071: for(ii=0; ii< cx; ii += diameter) {
072: dol.fillOval(ii,diameter/6,diameter,diameter/2,0,frames-1);
073: }
074:
075: for (frame = 0; frame < frames; frame++) {
076: int ledge; // front of the fish
077: ledge = frames-frame-2*diameter-diameter/2;
078: dol.setFrame(frame);
079:
080: // we now need to draw our fish. We will use two
081: // filled arcs for the body, of length 2*diameter and
082: // height diameter. To come in from the right
083: // we shift in x by frames-3*frame
084:
085: // We will need a periodic shift
086:
087: shift = (frame%42) -10; // a number from -10 through 31
088: if (shift > 10 ) shift = 21-shift;// now -10 through 10
089: // and 10 down to -10
090: rshift = (diameter*shift)/10; // and -diameter through diameter
091:
092:
093: // Draw a dorsal fin
094:
095: dol.setColor(bodycolor);
096: dol.fillArc(ledge+diameter+diameter/4-diameter/3,cy/2-2*diameter/3,
097: 2*diameter/3,diameter/3,90,180);
098: dol.setColor(seacolor);
099: dol.fillOval(ledge+diameter+diameter/4-diameter/6,cy/2-2*diameter/3,
100: diameter/3,diameter/3);
101:
102: // Draw the body with the mouth working
103:
104: dol.setColor(bodycolor);
105: dol.fillArc(ledge,cy/2-diameter/2,
106: 2*diameter,diameter,0,170+shift);
107: dol.fillArc(ledge,cy/2-diameter/2,
108: 2*diameter,diameter,190-shift,170+shift);
109:
110: // Add a tail, make it waggle
111:
112: dol.fillArc(ledge+2*diameter,cy/2-diameter/4,
113: diameter,diameter/2,90,180);
114: dol.setColor(seacolor);
115: dol.fillArc(ledge+2*diameter+diameter/4-rshift/6+1,
116: cy/2-diameter/4,
117: diameter/2+rshift/3,diameter/2,90,180);
118:
119: // draw side fin
120:
121: dol.setColor(linecolor);
122: dol.drawArc(ledge+diameter+diameter/10,
123: cy/2-diameter/4+(rshift+diameter)/8,
124: 2*diameter/3,diameter/2-(rshift+diameter)/4,180,90);
125: dol.drawArc(ledge+diameter+diameter/10+diameter/6,
126: cy/2-diameter/4+(rshift+diameter)/8,
127: diameter/3,diameter/2-(rshift+diameter)/4,180,90);
128:
129: // draw an eye
130:
131: dol.drawOval(ledge+diameter-diameter/2-diameter/10,
132: cy/2-diameter/4-diameter/10,
133: diameter/5,diameter/5);
134: dol.fillOval(ledge+diameter-diameter/2-diameter/20,
135: cy/2-diameter/4-diameter/20,
136: diameter/10,diameter/10);
137:
138: // blink the eye if we are near the middle
139:
140: if ((ledge+diameter-diameter/2 - cx/2) > -diameter/5 &&
141: (ledge+diameter-diameter/2 - cx/2) < diameter/5 ) {
142: dol.setColor(bodycolor);
143: // half close the eye
144: dol.fillArc(ledge+diameter-diameter/2-diameter/10-1,
145: cy/2-diameter/4-diameter/10-1,
146: diameter/5+2,diameter/5+2,0,180);
147: // close completely in the middle
148: if ((ledge+diameter-diameter/2 - cx/2) > -diameter/10 &&
149: (ledge+diameter-diameter/2 - cx/2) < diameter/10 ) {
150: dol.setColor(bodycolor);
151: dol.fillArc(ledge+diameter-diameter/2-diameter/10-1,
152: cy/2-diameter/4-diameter/10,
153: diameter/5+2,diameter/5-1,0,-180);
154: dol.setColor(linecolor);
155: dol.drawArc(ledge+diameter-diameter/2-diameter/10-1,
156: cy/2-diameter/4-diameter/10,
157: diameter/5+2,diameter/5-1,0,-180);
158: } else {
159: dol.setColor(linecolor);
160: dol.drawLine(ledge+diameter-diameter/2-diameter/10,
161: cy/2-diameter/4,
162: ledge+diameter-diameter/2+diameter/10,
163: cy/2-diameter/4);
164: }
165: }
166: }
167: }
168:
169: // display the entire set of frames
170: for (frame = 0; frame < frames; frame++) {
171:
172:
173: dol.ShowPage(this,frame);
174: try {
175: Thread.sleep(25); // sleep for 25 msec
176: } catch (InterruptedException t){}
177: }
178: try {
179: Thread.sleep(1000); // sleep or 1 sec
180: } catch (InterruptedException t) {}
181: repaint();
182: }
183:
184: }