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HyprWire
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DATA.Z
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WavyPlugIn.java
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1997-01-31
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package kinetix.hyperc1.userPlugIns;
/********************************************************************************\
** **
** (C) Copyright 1997 by Autodesk, Inc. **
** **
** This program is copyrighted by Autodesk, Inc. and is licensed to you under **
** the following conditions. You may not distribute or publish the source **
** code of this program in any form. You may incorporate this code in object **
** form in derivative works provided such derivative works are (i.) are de- **
** signed and intended to work solely with Autodesk, Inc. products, and (ii.) **
** contain Autodesk's copyright notice "(C) Copyright 1997 by Autodesk, Inc." **
** **
** AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS. AUTODESK SPE- **
** CIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR **
** A PARTICULAR USE. AUTODESK, INC. DOES NOT WARRANT THAT THE OPERATION OF **
** THE PROGRAM WILL BE UNINTERRUPTED OR ERROR FREE. **
** **
\********************************************************************************/
/**************************************************************************
WavyPlugIn: Samply PlugIn using piDraw()
Author: Amalgamated YoYoDyne PlugIns, Inc.(Hyperwire demonstration file)
Version: 1.0
**************************************************************************/
import java.applet.Applet;
import kinetix.hyperc1.runtime.*;
import java.awt.*;
/*** Object Class ***/
public class WavyPlugIn extends HwVisualUserPlugIn
{
private Point cp[] = new Point[4];
private Point vel[] = new Point[4];
private int velocityMultiplier = 10;
private String text = "KINETIX";
private int fontSize = 18;
private long prevTime = -1;
private Rectangle[] constrainR = new Rectangle[4];
private Font myFont;
private Color textColor = Color.black;
private Point dropShadowOffset = new Point(3, 3);
private boolean useShadow = true;
private static final double MAX_VEL = 8.0;
/* Funtion to generate a random velocity */
private final Point randomVel()
{
return new Point((int) (Math.random() * MAX_VEL), (int) (Math.random() * MAX_VEL));
}
/* Called at applet initialization */
public void piEventAppletInit(Applet theApplet) throws HwException
{
vel[0] = randomVel();
vel[1] = randomVel();
vel[2] = randomVel();
vel[3] = randomVel();
/* register this plugin with the refreshdaemon */
mRunService.siPlugInWantsTicks(true);
Rectangle r = ((VisualRunService) mRunService).siGetAbsRect();
int d = r.width / 5;
int yc = r.height / 2;
int w4 = r.width / 4;
cp[0] = new Point(d, yc);
cp[1] = new Point(d * 2, yc);
cp[2] = new Point(d * 3, yc);
cp[3] = new Point(d * 4, yc);
myFont = new Font("System",Font.BOLD, fontSize);
FontMetrics fontMetrics = theApplet.getGraphics().getFontMetrics( myFont );
int charHeight = fontMetrics.getHeight();
int rh = r.height - (2 * charHeight);
constrainR[0] = new Rectangle(0, charHeight, w4, rh);
constrainR[1] = new Rectangle(w4, charHeight, w4 * 2, rh);
constrainR[2] = new Rectangle(w4, charHeight, w4 * 2, rh);
constrainR[3] = new Rectangle(w4 * 3, charHeight, w4 - charHeight, rh);
}
/* compute point on curve */
private final Point getBezierPT(Point v[], double t)
{
int i, j;
Point q;
Point vTemp[];
vTemp = new Point[4];
for (i = 0; i < 4; i++)
vTemp[i] = new Point(v[i].x, v[i].y);
for (i = 1; i < 4; i++)
{
for (j = 0; j <= (3-i); j++)
{
vTemp[j].x = (int) ((1.0 - t) * vTemp[j].x + t * vTemp[j + 1].x);
vTemp[j].y = (int) ((1.0 - t) * vTemp[j].y + t * vTemp[j + 1].y);
}
}
q = vTemp[0];
return q;
}
/* called by piDraw() to draw text */
private final void drawTextOnBez(String text, Point v[], int ox, int oy, Graphics g, Point dropOffset)
{
int nChar = text.length();
double t;
Point pos;
g.setFont(myFont);
for (int i = 0; i < nChar; i++)
{
t = ((double) i / ((double) (nChar - 1)));
pos = getBezierPT(v, t);
if (useShadow)
{
Color oldColor = g.getColor();
g.setColor(Color.black);
g.drawString(text.substring(i, i + 1), pos.x + ox + dropOffset.x, pos.y + oy + dropOffset.y);
g.setColor(oldColor);
}
g.drawString(text.substring(i, i + 1), pos.x + ox, pos.y + oy);
}
}
/* called by runtime when plugin needs to be redrawn */
public void piDraw(Graphics g, Rectangle aClipRect)
throws HwException
{
Rectangle r = ((VisualRunService) mRunService).siGetAbsRect();
g.setColor(textColor);
drawTextOnBez(text, cp, r.x, r.y, g, dropShadowOffset);
}
/* keep text to bounding rect */
private final void constrainToBox(Point p, Point v, Rectangle r)
{
if (p.x < r.x)
{
p.x = r.x;
v.x = -v.x;
}
else if (p.x >= (r.x + r.width))
{
p.x = (r.x + r.width) - 1;
v.x = -v.x;
}
if (p.y < r.y)
{
p.y = r.y;
v.y = -v.y;
}
else if (p.y >= (r.y + r.height))
{
p.y = (r.y + r.height) - 1;
v.y = -v.y;
}
}
/* called when this plugin receives a timer tick */
public void piEventRefreshDaemonTick(long timeNow, RefreshDaemon worldMover )
throws HwException
{
if (prevTime < 0)
prevTime = timeNow;
long deltaTime = timeNow - prevTime;
prevTime = timeNow;
int dV = (int) ( deltaTime * velocityMultiplier );
Rectangle newRect = ((VisualRunService) mRunService).siGetAbsRect();
Point rSize = new Point(newRect.width, newRect.height);
for (int i = 0; i < 4; i++)
{
cp[i].x += (vel[i].x * dV) / 1000;
cp[i].y += (vel[i].y * dV) / 1000;
constrainToBox(cp[i], vel[i], constrainR[i]);
}
worldMover.invalidateRect(newRect.x, newRect.y, newRect.width, newRect.height);
}
/* Properties Interface */
public void fiSetSpeed(int i)
{
velocityMultiplier = i;
}
public void fiSetText(String s)
{
text = s;
}
public void fiSetColor(Color c)
{
textColor = c;
}
public void fiSetUseShadow(boolean b)
{
useShadow = b;
}
public void fiSetShadowOffset(Point p)
{
dropShadowOffset = p;
}
public void fiSetFontSize(int i)
{
fontSize = i;
}
/* Wire Interface */
public void wiSetText(String s)
{
text = new String(s);
}
}
