Mega Code Archive
Draw Spline
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import java.awt.*;
import javax.swing.*;
import no.geosoft.cc.geometry.Geometry;
import no.geosoft.cc.geometry.Matrix4x4;
import no.geosoft.cc.geometry.spline.SplineFactory;
import no.geosoft.cc.graphics.*;
/**
* G demo program. Demonstrates:
*
* <ul>
* <li> A rudimentary sheet music library
* <li> GObject extension
* <li> Advanced geometry generation
* </ul>
*
* @author <a href="mailto:jacob.dreyer@geosoft.no">Jacob Dreyer</a>
*/
public class Demo21 extends JFrame
{
public Demo21()
{
super ("G Graphics Library - Demo 21");
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
// Create the graphic canvas
GWindow window = new GWindow (new Color (255, 255, 255));
getContentPane().add (window.getCanvas());
// Create scene with default viewport and world extent settings
GScene scene = new GScene (window);
// Create a stave
GStave stave1 = new GStave (25);
stave1.setLocation (30, 50, 440);
GNote note;
note = new GNote ("f", 1.0, 10);
stave1.addNote (note);
note = new GNote ("g", 0.5, 10);
stave1.addNote (note);
note = new GNote ("d", 0.5, 10);
stave1.addNote (note);
note = new GNote ("a", 1.0, 10);
stave1.addNote (note);
note = new GNote ("a", 1.0, 10);
stave1.addNote (note);
// Another stave
GStave stave2 = new GStave (25);
stave2.setLocation (30, 250, 440);
note = new GNote ("a", 1.0, 10);
stave2.addNote (note);
note = new GNote ("a", 1.0, 10);
stave2.addNote (note);
note = new GNote ("h", 0.5, 10);
stave2.addNote (note);
note = new GNote ("e", 1.0, 10);
stave2.addNote (note);
note = new GNote ("g", 0.5, 10);
stave2.addNote (note);
scene.add (stave1);
scene.add (stave2);
pack();
setSize (new Dimension (500, 500));
setVisible (true);
}
private class GStave extends GObject
{
private int x_, y_;
private int length_;
private int lineGap_;
private GSegment[] lines_;
private GSegment startLine_;
private GSegment endLine_;
private GSegment endBar_;
private int current_;
public GStave (int lineGap)
{
lineGap_ = lineGap;
GStyle style = new GStyle();
style.setBackgroundColor (new Color (0, 0, 0));
style.setForegroundColor (new Color (0, 0, 0));
style.setLineWidth ((int) Math.max ((int) lineGap / 20.0, 1));
setStyle (style);
lines_ = new GSegment[5];
for (int i = 0; i < 5; i++) {
lines_[i] = new GSegment();
addSegment (lines_[i]);
}
startLine_ = new GSegment();
addSegment (startLine_);
endLine_ = new GSegment();
addSegment (endLine_);
endBar_ = new GSegment();
addSegment (endBar_);
}
public void setLocation (int x, int y, int length)
{
x_ = x;
y_ = y;
length_ = length;
current_ = x_ + 2 * lineGap_;
}
public void addNote (GNote note)
{
String value = note.getValue();
int y0 = 0;
if (value.equals ("c")) y0 = 10;
else if (value.equals ("d")) y0 = 9;
else if (value.equals ("e")) y0 = 8;
else if (value.equals ("f")) y0 = 7;
else if (value.equals ("g")) y0 = 6;
else if (value.equals ("a")) y0 = 5;
else if (value.equals ("h")) y0 = 4;
note.setLocation (current_, y_ + (int) Math.round (y0 * lineGap_ * 0.5));
add (note);
current_ += lineGap_ * 3;
}
public void draw()
{
for (int i = 0; i < 5; i++) {
lines_[i].setGeometry (x_, y_ + i * lineGap_,
x_ + length_, y_ + i * lineGap_);
}
startLine_.setGeometry (x_, y_, x_, y_ + 4 * lineGap_);
endBar_.setGeometry (new int[] {x_ + length_, y_,
x_ + length_ - (int) (lineGap_ * 0.5), y_,
x_ + length_ - (int) (lineGap_ * 0.5), y_ + 4 * lineGap_,
x_ + length_, y_ + 4 * lineGap_,
x_ + length_, y_});
endLine_.setGeometry (x_ + length_ - (int) (lineGap_ * 0.9), y_,
x_ + length_ - (int) (lineGap_ * 0.9),y_ + 4 * lineGap_);
}
}
private class GNote extends GObject
{
private String value_;
private double duration_;
private GSegment head_;
private GSegment stem_;
private GSegment flag_;
private int x_, y_;
private int headSize_;
private int stemLength_;
private Matrix4x4 headRotation_;
public GNote (String value, double duration, int size)
{
value_ = value;
duration_ = duration;
headSize_ = size;
GStyle style = new GStyle();
style.setBackgroundColor (new Color (0, 0, 0));
style.setForegroundColor (new Color (0, 0, 0));
setStyle (style);
head_ = new GSegment();
addSegment (head_);
stem_ = new GSegment();
addSegment (stem_);
flag_ = new GSegment();
addSegment (flag_);
}
public String getValue()
{
return value_;
}
public double getDuration()
{
return duration_;
}
public void setLocation (int x, int y)
{
x_ = x;
y_ = y;
}
public void draw()
{
//
// Head
//
int[] head = Geometry.createEllipse (0, 0,
headSize_,
(int) ((double) headSize_ * 1.5));
Matrix4x4 m = new Matrix4x4();
m.rotateZ (Math.PI / 3.0);
m.translate (x_, y_, 0.0);
m.transformXyPoints (head);
head_.setGeometry (head);
//
// Stem
//
int stemWidth = (int) Math.round ((double) headSize_ / 5.0);
if (stemWidth < 1) stemWidth = 1;
int stemLength = headSize_ * 8;
int stemX0 = x_ + (int) ((double) headSize_ * 1.40);
int stemY0 = y_ - (int) (headSize_ * 0.2);
int[] stem = new int[] {stemX0, stemY0,
stemX0 - stemWidth, stemY0,
stemX0 - stemWidth, stemY0 - stemLength,
stemX0, stemY0 - stemLength,
stemX0, stemY0};
stem_.setGeometry (stem);
//
// Flag
//
if (duration_ < 1.0) {
int flagX0 = stemX0;
int flagY0 = stemY0 - stemLength;
double[] cp = new double[]
{flagX0, flagY0, 0.0,
flagX0 + (int) (headSize_ * 0.5), flagY0 + (int) (stemLength * 0.2), 0.0,
flagX0 + (int) (headSize_ * 2.0), flagY0 + (int) (stemLength * 0.5), 0.0,
flagX0 + (int) (headSize_ * 1.8), flagY0 + (int) (stemLength * 0.9), 0.0};
double[] spline1 = SplineFactory.createCatmullRom (cp, 20);
cp = new double[]
{flagX0 + (int) (headSize_ * 1.8), flagY0 + (int) (stemLength * 0.9), 0.0,
flagX0 + (int) (headSize_ * 1.7), flagY0 + (int) (stemLength * 0.7), 0.0,
flagX0 + (int) (headSize_ * 0.5), flagY0 + (int) (stemLength * 0.45), 0.0,
flagX0, flagY0 + (int) (stemLength * 0.35), 0.0};
double[] spline2 = SplineFactory.createCatmullRom (cp, 20);
int[] flag = new int[(spline1.length + spline2.length) / 3 * 2];
int j = 0;
for (int i = 0; i < spline1.length; i+=3) {
flag[j++] = (int) Math.round (spline1[i+0]);
flag[j++] = (int) Math.round (spline1[i+1]);
}
for (int i = 0; i < spline2.length; i+=3) {
flag[j++] = (int) Math.round (spline2[i+0]);
flag[j++] = (int) Math.round (spline2[i+1]);
}
flag_.setGeometry (flag);
}
}
}
public static void main (String[] args)
{
new Demo21();
}
}
G-DrawSpline.zip( 249 k)
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