/**
* Draw a filled polygon with the given (x[i], y[i]) coordinates.
*
* @param x an array of all the x-coordindates of the polygon
* @param y an array of all the y-coordindates of the polygon
*/
public static void filledPolygon(double[] x, double[] y) {
int N = x.length;
GeneralPath path = new GeneralPath();
path.moveTo((float) scaleX(x[0]), (float) scaleY(y[0]));
for (int i = 0; i < N; i++) path.lineTo((float) scaleX(x[i]), (float) scaleY(y[i]));
path.closePath();
offscreen.fill(path);
draw();
}
/**
* Write the given text string in the current font, left-aligned at (x, y).
*
* @param x the x-coordinate of the text
* @param y the y-coordinate of the text
* @param s the text
*/
public static void textLeft(double x, double y, String s) {
offscreen.setFont(font);
FontMetrics metrics = offscreen.getFontMetrics();
double xs = scaleX(x);
double ys = scaleY(y);
int hs = metrics.getDescent();
offscreen.drawString(s, (float) (xs), (float) (ys + hs));
draw();
}
/**
* Display on screen, pause for t milliseconds, and turn on <em>animation mode</em>: subsequent
* calls to drawing methods such as <tt>line()</tt>, <tt>circle()</tt>, and <tt>square()</tt> will
* not be displayed on screen until the next call to <tt>show()</tt>. This is useful for producing
* animations (clear the screen, draw a bunch of shapes, display on screen for a fixed amount of
* time, and repeat). It also speeds up drawing a huge number of shapes (call <tt>show(0)</tt> to
* defer drawing on screen, draw the shapes, and call <tt>show(0)</tt> to display them all on
* screen at once).
*
* @param t number of milliseconds
*/
public static void show(int t) {
defer = false;
draw();
try {
Thread.currentThread().sleep(t);
} catch (InterruptedException e) {
System.out.println("Error sleeping");
}
defer = true;
}
/**
* Draw filled circle of radius r, centered on (x, y).
*
* @param x the x-coordinate of the center of the circle
* @param y the y-coordinate of the center of the circle
* @param r the radius of the circle
* @throws RuntimeException if the radius of the circle is negative
*/
public static void filledCircle(double x, double y, double r) {
if (r < 0) throw new RuntimeException("circle radius can't be negative");
double xs = scaleX(x);
double ys = scaleY(y);
double ws = factorX(2 * r);
double hs = factorY(2 * r);
if (ws <= 1 && hs <= 1) pixel(x, y);
else offscreen.fill(new Ellipse2D.Double(xs - ws / 2, ys - hs / 2, ws, hs));
draw();
}
/**
* Draw a filled square of side length 2r, centered on (x, y).
*
* @param x the x-coordinate of the center of the square
* @param y the y-coordinate of the center of the square
* @param r radius is half the length of any side of the square
* @throws RuntimeException if r is negative
*/
public static void filledSquare(double x, double y, double r) {
if (r < 0) throw new RuntimeException("square side length can't be negative");
double xs = scaleX(x);
double ys = scaleY(y);
double ws = factorX(2 * r);
double hs = factorY(2 * r);
if (ws <= 1 && hs <= 1) pixel(x, y);
else offscreen.fill(new Rectangle2D.Double(xs - ws / 2, ys - hs / 2, ws, hs));
draw();
}
/**
* Draw a filled rectangle of given half width and half height, centered on (x, y).
*
* @param x the x-coordinate of the center of the rectangle
* @param y the y-coordinate of the center of the rectangle
* @param halfWidth is half the width of the rectangle
* @param halfHeight is half the height of the rectangle
* @throws RuntimeException if halfWidth or halfHeight is negative
*/
public static void filledRectangle(double x, double y, double halfWidth, double halfHeight) {
if (halfWidth < 0) throw new RuntimeException("half width can't be negative");
if (halfHeight < 0) throw new RuntimeException("half height can't be negative");
double xs = scaleX(x);
double ys = scaleY(y);
double ws = factorX(2 * halfWidth);
double hs = factorY(2 * halfHeight);
if (ws <= 1 && hs <= 1) pixel(x, y);
else offscreen.fill(new Rectangle2D.Double(xs - ws / 2, ys - hs / 2, ws, hs));
draw();
}
/**
* Draw an ellipse with given semimajor and semiminor axes, centered on (x, y).
*
* @param x the x-coordinate of the center of the ellipse
* @param y the y-coordinate of the center of the ellipse
* @param semiMajorAxis is the semimajor axis of the ellipse
* @param semiMinorAxis is the semiminor axis of the ellipse
* @throws RuntimeException if either of the axes are negative
*/
public static void filledEllipse(double x, double y, double semiMajorAxis, double semiMinorAxis) {
if (semiMajorAxis < 0) throw new RuntimeException("ellipse semimajor axis can't be negative");
if (semiMinorAxis < 0) throw new RuntimeException("ellipse semiminor axis can't be negative");
double xs = scaleX(x);
double ys = scaleY(y);
double ws = factorX(2 * semiMajorAxis);
double hs = factorY(2 * semiMinorAxis);
if (ws <= 1 && hs <= 1) pixel(x, y);
else offscreen.fill(new Ellipse2D.Double(xs - ws / 2, ys - hs / 2, ws, hs));
draw();
}
/**
* Draw a point at (x, y).
*
* @param x the x-coordinate of the point
* @param y the y-coordinate of the point
*/
public static void point(double x, double y) {
double xs = scaleX(x);
double ys = scaleY(y);
double r = penRadius;
// double ws = factorX(2*r);
// double hs = factorY(2*r);
// if (ws <= 1 && hs <= 1) pixel(x, y);
if (r <= 1) pixel(x, y);
else offscreen.fill(new Ellipse2D.Double(xs - r / 2, ys - r / 2, r, r));
draw();
}
/**
* Draw picture (gif, jpg, or png) centered on (x, y).
*
* @param x the center x-coordinate of the image
* @param y the center y-coordinate of the image
* @param s the name of the image/picture, e.g., "ball.gif"
* @throws RuntimeException if the image is corrupt
*/
public static void picture(double x, double y, String s) {
Image image = getImage(s);
double xs = scaleX(x);
double ys = scaleY(y);
int ws = image.getWidth(null);
int hs = image.getHeight(null);
if (ws < 0 || hs < 0) throw new RuntimeException("image " + s + " is corrupt");
offscreen.drawImage(
image, (int) Math.round(xs - ws / 2.0), (int) Math.round(ys - hs / 2.0), null);
draw();
}
/**
* Draw an arc of radius r, centered on (x, y), from angle1 to angle2 (in degrees).
*
* @param x the x-coordinate of the center of the circle
* @param y the y-coordinate of the center of the circle
* @param r the radius of the circle
* @param angle1 the starting angle. 0 would mean an arc beginning at 3 o'clock.
* @param angle2 the angle at the end of the arc. For example, if you want a 90 degree arc, then
* angle2 should be angle1 + 90.
* @throws RuntimeException if the radius of the circle is negative
*/
public static void arc(double x, double y, double r, double angle1, double angle2) {
if (r < 0) throw new RuntimeException("arc radius can't be negative");
while (angle2 < angle1) angle2 += 360;
double xs = scaleX(x);
double ys = scaleY(y);
double ws = factorX(2 * r);
double hs = factorY(2 * r);
if (ws <= 1 && hs <= 1) pixel(x, y);
else
offscreen.draw(
new Arc2D.Double(xs - ws / 2, ys - hs / 2, ws, hs, angle1, angle2 - angle1, Arc2D.OPEN));
draw();
}
/**
* Draw picture (gif, jpg, or png) centered on (x, y), rotated given number of degrees, rescaled
* to w-by-h.
*
* @param x the center x-coordinate of the image
* @param y the center y-coordinate of the image
* @param s the name of the image/picture, e.g., "ball.gif"
* @param w the width of the image
* @param h the height of the image
* @param degrees is the number of degrees to rotate counterclockwise
* @throws RuntimeException if the image is corrupt
*/
public static void picture(double x, double y, String s, double w, double h, double degrees) {
Image image = getImage(s);
double xs = scaleX(x);
double ys = scaleY(y);
double ws = factorX(w);
double hs = factorY(h);
if (ws < 0 || hs < 0) throw new RuntimeException("image " + s + " is corrupt");
if (ws <= 1 && hs <= 1) pixel(x, y);
offscreen.rotate(Math.toRadians(-degrees), xs, ys);
offscreen.drawImage(
image,
(int) Math.round(xs - ws / 2.0),
(int) Math.round(ys - hs / 2.0),
(int) Math.round(ws),
(int) Math.round(hs),
null);
offscreen.rotate(Math.toRadians(+degrees), xs, ys);
draw();
}
/**
* Draw picture (gif, jpg, or png) centered on (x, y), rescaled to w-by-h.
*
* @param x the center x coordinate of the image
* @param y the center y coordinate of the image
* @param s the name of the image/picture, e.g., "ball.gif"
* @param w the width of the image
* @param h the height of the image
* @throws RuntimeException if the width height are negative
* @throws RuntimeException if the image is corrupt
*/
public static void picture(double x, double y, String s, double w, double h) {
Image image = getImage(s);
double xs = scaleX(x);
double ys = scaleY(y);
if (w < 0) throw new RuntimeException("width is negative: " + w);
if (h < 0) throw new RuntimeException("height is negative: " + h);
double ws = factorX(w);
double hs = factorY(h);
if (ws < 0 || hs < 0) throw new RuntimeException("image " + s + " is corrupt");
if (ws <= 1 && hs <= 1) pixel(x, y);
else {
offscreen.drawImage(
image,
(int) Math.round(xs - ws / 2.0),
(int) Math.round(ys - hs / 2.0),
(int) Math.round(ws),
(int) Math.round(hs),
null);
}
draw();
}
/**
* Display on-screen and turn off animation mode: subsequent calls to drawing methods such as
* <tt>line()</tt>, <tt>circle()</tt>, and <tt>square()</tt> will be displayed on screen when
* called. This is the default.
*/
public static void show() {
defer = false;
draw();
}
/**
* Draw a line from (x0, y0) to (x1, y1).
*
* @param x0 the x-coordinate of the starting point
* @param y0 the y-coordinate of the starting point
* @param x1 the x-coordinate of the destination point
* @param y1 the y-coordinate of the destination point
*/
public static void line(double x0, double y0, double x1, double y1) {
offscreen.draw(new Line2D.Double(scaleX(x0), scaleY(y0), scaleX(x1), scaleY(y1)));
draw();
}
/**
* Clear the screen to the given color.
*
* @param color the Color to make the background
*/
public static void clear(Color color) {
offscreen.setColor(color);
offscreen.fillRect(0, 0, width, height);
offscreen.setColor(penColor);
draw();
}
