org.gannacademy.cdf.turtlelogo.AnimatedTurtle.draw(Graphics2D,UnderTheSurface) - Code Metrics - gann-cdf/turtle-logo - Measure and Improve Code Quality continuously with Scrutinizer

draw(Graphics2D,UnderTheSurface) C
last analyzed 2018-09-12 01:19 UTC

↳ Parent: org.gannacademy.cdf.turtlelogo.AnimatedTurtle

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	28
c	0
b	0
f	0
cc	9
rs	6.6666

package org.gannacademy.cdf.turtlelogo;

import java.awt.*;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;

/**
 * Animated turtles are turtles that move more slowly, so that we can observe them following their instructions. Their
 * speed can be adjusted either when they are instantiated or as a separate instruction ({@link #speed(long)})
 *
 * @author <a href="https://github.com/gann-cdf/turtlelogo/issues">Seth Battis</a>
 */
public class AnimatedTurtle extends Turtle implements Runnable {

  /**
   * 10 milliseconds
   */
  public static final long DEFAULT_FRAME_DELAY = 10; // milliseconds

  /**
   * <p>25 milliseconds</p>
   * <p>This is an internal measure, sued to determine how and when to animate turtle turns (frame delays longer than
   * this cutoff will have the turns animated in larger steps</p>
   */
  public static final long TURN_SPEED_CUTOFF = 25; // milliseconds

  private enum Verb {
    MOVE, TURN, HEAD,
    PEN_UP, PEN_DOWN, PEN_COLOR, PEN_WIDTH,
    HIDE, SHOW,
    MOVE_TO, TELEPORT, HOME,
    SPEED
  }

  private class Instruction {
    private Verb verb;
    private Object parameter;

    public Instruction(Verb verb) {
      this.verb = verb;
    }

    public Instruction(Verb verb, double value) {
      this.verb = verb;
      this.parameter = value;
    }

    public Instruction(Verb verb, long value) {
      this.verb = verb;
      this.parameter = value;
    }

    public Instruction(Verb verb, double x, double y) {
      this.verb = verb;
      this.parameter = new Point2D.Double(x, y);
    }

    public Instruction(Verb verb, Color color) {
      this.verb = verb;
      this.parameter = color;
    }

    public Verb getVerb() {
      return verb;
    }

    public double getDoubleParam() {
      return (double) parameter;
    }

    public long getLongParam() {
      return (long) parameter;
    }

    public Point2D getPointParam() {
      return (Point2D) parameter;
    }

    public Color getColorParam() {
      return (Color) parameter;
    }

    public void convertTo(Verb verb) {
      this.verb = verb;
    }
  }

  private Queue<Instruction> instructions;
  private Instruction activeInstruction;
  private double MOVE_steps, MOVE_targetSteps, TURN_degrees, TURN_targetDegrees, MOVE_TO_tempHeadingInRadians;
  private long frameDelay, tick;
  private boolean threadStarted = false;

  /**
   * Construct an animated turtle with {@link #DEFAULT_FRAME_DELAY}
   */
  public AnimatedTurtle() {
    this(DEFAULT_FRAME_DELAY);
  }

  /**
   * Construct an animated turtle with a custom frame delay
   *
   * @param frameDelay between frames of animation, measured in milliseconds
   */
  public AnimatedTurtle(long frameDelay) {
    this(frameDelay, Terrarium.getInstance());
  }

  /**
   * Construct an animated turtle with {@link #DEFAULT_FRAME_DELAY} in a specific terrarium
   *
   * @param terrarium to house the turtle
   */
  public AnimatedTurtle(Terrarium terrarium) {
    this(DEFAULT_FRAME_DELAY, terrarium);
  }

  /**
   * Construct an animated turtle with a custom frame delay in a specific terrarium
   *
   * @param frameDelay between frames of animation, measured in milliseconds
   * @param terrarium  to house the turtle
   */
  public AnimatedTurtle(long frameDelay, Terrarium terrarium) {
    super(terrarium);
    this.frameDelay = frameDelay;
    tick = System.currentTimeMillis();
    instructions = new ConcurrentLinkedQueue<>(); // thread-safe
    new Thread(this).start();
  }

  @Override
  public void move(double steps) {
    instructions.add(new Instruction(Verb.MOVE, steps));
  }

  @Override
  public void turn(double angle) {
    instructions.add(new Instruction(Verb.TURN, angle));
  }

  @Override
  public void head(double heading) {
    instructions.add(new Instruction(Verb.HEAD, heading));
  }

  @Override
  public void penUp() {
    instructions.add(new Instruction(Verb.PEN_UP));
  }

  @Override
  public void penDown() {
    instructions.add(new Instruction(Verb.PEN_DOWN));
  }

  @Override
  public void penColor(Color color) {
    instructions.add(new Instruction(Verb.PEN_COLOR, color));
  }

  @Override
  public void penWidth(double width) {
    instructions.add(new Instruction(Verb.PEN_WIDTH, width));
  }

  @Override
  public void hide() {
    instructions.add(new Instruction(Verb.HIDE));
  }

  @Override
  public void show() {
    instructions.add(new Instruction(Verb.SHOW));
  }

  @Override
  public void teleport(double x, double y) {
    instructions.add(new Instruction(Verb.TELEPORT, x, y));
  }

  @Override
  public void moveTo(double x, double y) {
    instructions.add(new Instruction(Verb.MOVE_TO, x, y));
  }

  @Override
  public void home() {
    instructions.add(new Instruction(Verb.HOME));
  }

  /**
   * Alias for {@link #speed(long)}
   *
   * @param frameDelay in milliseconds
   */
  public void sp(long frameDelay) {
    speed(frameDelay);
  }

  /**
   * <p>Set the speed of the turtle's animation</p>
   * <p>The frame delay is the time between individual frames of animation. Shorter frame delays
   * (below {@link #TURN_SPEED_CUTOFF}) will cause turn animations to be animated in more detail to allow them to remain
   * visible to the naked eye</p>
   *
   * @param frameDelay in milliseconds
   */
  public void speed(long frameDelay) {
    instructions.add(new Instruction(Verb.SPEED, frameDelay));
  }

  /**
   * <p>Thread execution</p>
   * <p>This method is the control loop that allows animation to be updated in a separate control loop for each turtle.
   * This method should not be called by students (although calling it manually should do nothing).</p>
   */
  @Override
  public void run() {
    if (!threadStarted) {
      threadStarted = true;
      while (true) {

        if (activeInstruction == null) {
          if (!instructions.isEmpty()) {
            activeInstruction = instructions.remove();
            switch (activeInstruction.getVerb()) {
              case MOVE:
                MOVE_targetSteps = activeInstruction.getDoubleParam();
                MOVE_steps = 0;
                break;
              case MOVE_TO:
                double dx = activeInstruction.getPointParam().getX() - getX(),
                        dy = activeInstruction.getPointParam().getY() - getY();
                MOVE_targetSteps = Math.hypot(dx, dy);
                MOVE_steps = 0;
                MOVE_TO_tempHeadingInRadians = Math.atan2(dy, dx);
                break;
              case TURN:
                TURN_targetDegrees = activeInstruction.getDoubleParam();
                TURN_degrees = 0;
                break;
              case HEAD:
                activeInstruction.convertTo(Verb.TURN);
                if (Math.abs(getHeadingInDegrees() - activeInstruction.getDoubleParam()) > 180.0) {
                  TURN_targetDegrees = (360 - Math.abs(getHeadingInDegrees() - activeInstruction.getDoubleParam())) * (getHeadingInDegrees() > activeInstruction.getDoubleParam() ? 1 : -1);
                } else {
                  TURN_targetDegrees = getHeadingInDegrees() - activeInstruction.getDoubleParam();
                }
                TURN_degrees = 0;
                break;
              case PEN_UP:
                super.penUp();
                activeInstruction = null;
                break;
              case PEN_DOWN:
                super.penDown();
                activeInstruction = null;
                break;
              case PEN_COLOR:
                super.penColor(activeInstruction.getColorParam());
                activeInstruction = null;
                break;
              case PEN_WIDTH:
                super.penWidth(activeInstruction.getDoubleParam());
                activeInstruction = null;
                break;
              case HIDE:
                super.hide();
                activeInstruction = null;
                break;
              case SHOW:
                super.show();
                activeInstruction = null;
                break;
              case TELEPORT:
                super.teleport(activeInstruction.getPointParam().getX(), activeInstruction.getPointParam().getY());
                activeInstruction = null;
                break;
              case HOME:
                super.home();
                activeInstruction = null;
                break;
              case SPEED:
                frameDelay = activeInstruction.getLongParam();
                activeInstruction = null;
                break;
            }
          }
        } else if (System.currentTimeMillis() > tick + frameDelay) {
          tick = System.currentTimeMillis();
          switch (activeInstruction.getVerb()) {

            case MOVE:
            case MOVE_TO:
              if (Math.abs(MOVE_steps) >= Math.abs(MOVE_targetSteps)) {
                if (activeInstruction.getVerb() == Verb.MOVE) {
                  super.move(MOVE_targetSteps);
                } else {
                  super.moveTo(activeInstruction.getPointParam().getX(), activeInstruction.getPointParam().getY());
                }
                activeInstruction = null;
              } else {
                MOVE_steps += (MOVE_targetSteps > 0.0 ? 1 : -1);
              }
              break;
            case TURN:
              if (Math.abs(TURN_degrees) >= Math.abs(TURN_targetDegrees)) {
                super.turn(TURN_targetDegrees);
                activeInstruction = null;
              } else {
                TURN_degrees += (TURN_targetDegrees > 0.0 ? 1 : -1) * (frameDelay >= TURN_SPEED_CUTOFF ? 1 : TURN_SPEED_CUTOFF - frameDelay);
              }
              break;
          }
          getTerrarium().repaint();
        }
      }
    }
  }

  public void draw(Graphics2D context, Terrarium.UnderTheSurface key) {
    key.hashCode();
    if (activeInstruction == null) {
      super.draw(context, key);
    } else {
      context.setPaint(getPenColor());
      context.setStroke(getPenStroke());
      switch (activeInstruction.getVerb()) {

        case MOVE:
        case MOVE_TO:
          double moveHeadingInRadians = MOVE_TO_tempHeadingInRadians;
          if (activeInstruction.getVerb() == Verb.MOVE) {
            moveHeadingInRadians = getHeadingInRadians();
          }
          double tempX = getX() + Math.cos(moveHeadingInRadians) * MOVE_steps;
          double tempY = getY() + Math.sin(moveHeadingInRadians) * MOVE_steps;
          if (isPenDown()) {
            context.draw(new Line2D.Double(getX(), getY(), tempX, tempY));
          }
          if (!isHidden()) {
            drawIcon(tempX, tempY, getHeadingInRadians(), context);
          }
          break;
        case TURN:
          if (!isHidden()) {
            drawIcon(getX(), getY(), Math.toRadians(getHeadingInDegrees() + TURN_degrees), context);
          }
          break;
      }
    }
  }
}


1			package org.gannacademy.cdf.turtlelogo;
2
3			import java.awt.*;
4			import java.awt.geom.Line2D;
5			import java.awt.geom.Point2D;
6			import java.util.Queue;
7			import java.util.concurrent.ConcurrentLinkedQueue;
8
9			/**
10			* Animated turtles are turtles that move more slowly, so that we can observe them following their instructions. Their
11			* speed can be adjusted either when they are instantiated or as a separate instruction ({@link #speed(long)})
12			*
13			* @author <a href="https://github.com/gann-cdf/turtlelogo/issues">Seth Battis</a>
14			*/
15			public class AnimatedTurtle extends Turtle implements Runnable {
16
17			/**
18			* 10 milliseconds
19			*/
20			public static final long DEFAULT_FRAME_DELAY = 10; // milliseconds
21
22			/**
23			* <p>25 milliseconds</p>
24			* <p>This is an internal measure, sued to determine how and when to animate turtle turns (frame delays longer than
25			* this cutoff will have the turns animated in larger steps</p>
26			*/
27			public static final long TURN_SPEED_CUTOFF = 25; // milliseconds
28
29			private enum Verb {
30			MOVE, TURN, HEAD,
31			PEN_UP, PEN_DOWN, PEN_COLOR, PEN_WIDTH,
32			HIDE, SHOW,
33			MOVE_TO, TELEPORT, HOME,
34			SPEED
35			}
36
37			private class Instruction {
38			private Verb verb;
39			private Object parameter;
40
41			public Instruction(Verb verb) {
42			this.verb = verb;
43			}
44
45			public Instruction(Verb verb, double value) {
46			this.verb = verb;
47			this.parameter = value;
48			}
49
50			public Instruction(Verb verb, long value) {
51			this.verb = verb;
52			this.parameter = value;
53			}
54
55			public Instruction(Verb verb, double x, double y) {
56			this.verb = verb;
57			this.parameter = new Point2D.Double(x, y);
58			}
59
60			public Instruction(Verb verb, Color color) {
61			this.verb = verb;
62			this.parameter = color;
63			}
64
65			public Verb getVerb() {
66			return verb;
67			}
68
69			public double getDoubleParam() {
70			return (double) parameter;
71			}
72
73			public long getLongParam() {
74			return (long) parameter;
75			}
76
77			public Point2D getPointParam() {
78			return (Point2D) parameter;
79			}
80
81			public Color getColorParam() {
82			return (Color) parameter;
83			}
84
85			public void convertTo(Verb verb) {
86			this.verb = verb;
87			}
88			}
89
90			private Queue<Instruction> instructions;
91			private Instruction activeInstruction;
92			private double MOVE_steps, MOVE_targetSteps, TURN_degrees, TURN_targetDegrees, MOVE_TO_tempHeadingInRadians;
93			private long frameDelay, tick;
94			private boolean threadStarted = false;
95
96			/**
97			* Construct an animated turtle with {@link #DEFAULT_FRAME_DELAY}
98			*/
99			public AnimatedTurtle() {
100			this(DEFAULT_FRAME_DELAY);
101			}
102
103			/**
104			* Construct an animated turtle with a custom frame delay
105			*
106			* @param frameDelay between frames of animation, measured in milliseconds
107			*/
108			public AnimatedTurtle(long frameDelay) {
109			this(frameDelay, Terrarium.getInstance());
110			}
111
112			/**
113			* Construct an animated turtle with {@link #DEFAULT_FRAME_DELAY} in a specific terrarium
114			*
115			* @param terrarium to house the turtle
116			*/
117			public AnimatedTurtle(Terrarium terrarium) {
118			this(DEFAULT_FRAME_DELAY, terrarium);
119			}
120
121			/**
122			* Construct an animated turtle with a custom frame delay in a specific terrarium
123			*
124			* @param frameDelay between frames of animation, measured in milliseconds
125			* @param terrarium to house the turtle
126			*/
127			public AnimatedTurtle(long frameDelay, Terrarium terrarium) {
128			super(terrarium);
129			this.frameDelay = frameDelay;
130			tick = System.currentTimeMillis();
131			instructions = new ConcurrentLinkedQueue<>(); // thread-safe
132			new Thread(this).start();
133			}
134
135			@Override
136			public void move(double steps) {
137			instructions.add(new Instruction(Verb.MOVE, steps));
138			}
139
140			@Override
141			public void turn(double angle) {
142			instructions.add(new Instruction(Verb.TURN, angle));
143			}
144
145			@Override
146			public void head(double heading) {
147			instructions.add(new Instruction(Verb.HEAD, heading));
148			}
149
150			@Override
151			public void penUp() {
152			instructions.add(new Instruction(Verb.PEN_UP));
153			}
154
155			@Override
156			public void penDown() {
157			instructions.add(new Instruction(Verb.PEN_DOWN));
158			}
159
160			@Override
161			public void penColor(Color color) {
162			instructions.add(new Instruction(Verb.PEN_COLOR, color));
163			}
164
165			@Override
166			public void penWidth(double width) {
167			instructions.add(new Instruction(Verb.PEN_WIDTH, width));
168			}
169
170			@Override
171			public void hide() {
172			instructions.add(new Instruction(Verb.HIDE));
173			}
174
175			@Override
176			public void show() {
177			instructions.add(new Instruction(Verb.SHOW));
178			}
179
180			@Override
181			public void teleport(double x, double y) {
182			instructions.add(new Instruction(Verb.TELEPORT, x, y));
183			}
184
185			@Override
186			public void moveTo(double x, double y) {
187			instructions.add(new Instruction(Verb.MOVE_TO, x, y));
188			}
189
190			@Override
191			public void home() {
192			instructions.add(new Instruction(Verb.HOME));
193			}
194
195			/**
196			* Alias for {@link #speed(long)}
197			*
198			* @param frameDelay in milliseconds
199			*/
200			public void sp(long frameDelay) {
201			speed(frameDelay);
202			}
203
204			/**
205			* <p>Set the speed of the turtle's animation</p>
206			* <p>The frame delay is the time between individual frames of animation. Shorter frame delays
207			* (below {@link #TURN_SPEED_CUTOFF}) will cause turn animations to be animated in more detail to allow them to remain
208			* visible to the naked eye</p>
209			*
210			* @param frameDelay in milliseconds
211			*/
212			public void speed(long frameDelay) {
213			instructions.add(new Instruction(Verb.SPEED, frameDelay));
214			}
215
216			/**
217			* <p>Thread execution</p>
218			* <p>This method is the control loop that allows animation to be updated in a separate control loop for each turtle.
219			* This method should not be called by students (although calling it manually should do nothing).</p>
220			*/
221			@Override
222			public void run() {
223			if (!threadStarted) {
224			threadStarted = true;
225			while (true) {
			0 ignored issues – show introduced 2018-07-17 18:02 UTC by Report Bug Copy Issue Report Add an end condition to this loop. Loading history...
226			if (activeInstruction == null) {
227			if (!instructions.isEmpty()) {
228			activeInstruction = instructions.remove();
229			switch (activeInstruction.getVerb()) {
230			case MOVE:
231			MOVE_targetSteps = activeInstruction.getDoubleParam();
232			MOVE_steps = 0;
233			break;
234			case MOVE_TO:
235			double dx = activeInstruction.getPointParam().getX() - getX(),
236			dy = activeInstruction.getPointParam().getY() - getY();
237			MOVE_targetSteps = Math.hypot(dx, dy);
238			MOVE_steps = 0;
239			MOVE_TO_tempHeadingInRadians = Math.atan2(dy, dx);
240			break;
241			case TURN:
242			TURN_targetDegrees = activeInstruction.getDoubleParam();
243			TURN_degrees = 0;
244			break;
245			case HEAD:
246			activeInstruction.convertTo(Verb.TURN);
247			if (Math.abs(getHeadingInDegrees() - activeInstruction.getDoubleParam()) > 180.0) {
248			TURN_targetDegrees = (360 - Math.abs(getHeadingInDegrees() - activeInstruction.getDoubleParam())) * (getHeadingInDegrees() > activeInstruction.getDoubleParam() ? 1 : -1);
249			} else {
250			TURN_targetDegrees = getHeadingInDegrees() - activeInstruction.getDoubleParam();
251			}
252			TURN_degrees = 0;
253			break;
254			case PEN_UP:
255			super.penUp();
256			activeInstruction = null;
257			break;
258			case PEN_DOWN:
259			super.penDown();
260			activeInstruction = null;
261			break;
262			case PEN_COLOR:
263			super.penColor(activeInstruction.getColorParam());
264			activeInstruction = null;
265			break;
266			case PEN_WIDTH:
267			super.penWidth(activeInstruction.getDoubleParam());
268			activeInstruction = null;
269			break;
270			case HIDE:
271			super.hide();
272			activeInstruction = null;
273			break;
274			case SHOW:
275			super.show();
276			activeInstruction = null;
277			break;
278			case TELEPORT:
279			super.teleport(activeInstruction.getPointParam().getX(), activeInstruction.getPointParam().getY());
280			activeInstruction = null;
281			break;
282			case HOME:
283			super.home();
284			activeInstruction = null;
285			break;
286			case SPEED:
287			frameDelay = activeInstruction.getLongParam();
288			activeInstruction = null;
289			break;
290			}
291			}
292			} else if (System.currentTimeMillis() > tick + frameDelay) {
293			tick = System.currentTimeMillis();
294			switch (activeInstruction.getVerb()) {
			0 ignored issues – show Code Smell introduced 2018-07-17 18:02 UTC by Report Bug Copy Issue Report Complete cases by adding the missing enum constants or add a default case to this switch. Default branches should deal with the unexpected. At a minimum, they should log the error and if applicable, return a default value (null, empty collection). If you really do not expect the default branch to ever be use, throw a RuntimeException when it is. Loading history...
295			case MOVE:
296			case MOVE_TO:
297			if (Math.abs(MOVE_steps) >= Math.abs(MOVE_targetSteps)) {
298			if (activeInstruction.getVerb() == Verb.MOVE) {
299			super.move(MOVE_targetSteps);
300			} else {
301			super.moveTo(activeInstruction.getPointParam().getX(), activeInstruction.getPointParam().getY());
302			}
303			activeInstruction = null;
304			} else {
305			MOVE_steps += (MOVE_targetSteps > 0.0 ? 1 : -1);
306			}
307			break;
308			case TURN:
309			if (Math.abs(TURN_degrees) >= Math.abs(TURN_targetDegrees)) {
310			super.turn(TURN_targetDegrees);
311			activeInstruction = null;
312			} else {
313			TURN_degrees += (TURN_targetDegrees > 0.0 ? 1 : -1) * (frameDelay >= TURN_SPEED_CUTOFF ? 1 : TURN_SPEED_CUTOFF - frameDelay);
314			}
315			break;
316			}
317			getTerrarium().repaint();
318			}
319			}
320			}
321			}
322
323			public void draw(Graphics2D context, Terrarium.UnderTheSurface key) {
324			key.hashCode();
325			if (activeInstruction == null) {
326			super.draw(context, key);
327			} else {
328			context.setPaint(getPenColor());
329			context.setStroke(getPenStroke());
330			switch (activeInstruction.getVerb()) {
			0 ignored issues – show Code Smell introduced 2018-07-17 18:02 UTC by Report Bug Copy Issue Report Complete cases by adding the missing enum constants or add a default case to this switch. Default branches should deal with the unexpected. At a minimum, they should log the error and if applicable, return a default value (null, empty collection). If you really do not expect the default branch to ever be use, throw a RuntimeException when it is. Loading history...
331			case MOVE:
332			case MOVE_TO:
333			double moveHeadingInRadians = MOVE_TO_tempHeadingInRadians;
334			if (activeInstruction.getVerb() == Verb.MOVE) {
335			moveHeadingInRadians = getHeadingInRadians();
336			}
337			double tempX = getX() + Math.cos(moveHeadingInRadians) * MOVE_steps;
338			double tempY = getY() + Math.sin(moveHeadingInRadians) * MOVE_steps;
339			if (isPenDown()) {
340			context.draw(new Line2D.Double(getX(), getY(), tempX, tempY));
341			}
342			if (!isHidden()) {
343			drawIcon(tempX, tempY, getHeadingInRadians(), context);
344			}
345			break;
346			case TURN:
347			if (!isHidden()) {
348			drawIcon(getX(), getY(), Math.toRadians(getHeadingInDegrees() + TURN_degrees), context);
349			}
350			break;
351			}
352			}
353			}
354			}
355

gann-cdf / turtle-logo

draw(Graphics2D,UnderTheSurface) C last analyzed 2018-09-12 01:19 UTC

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draw(Graphics2D,UnderTheSurface) C
last analyzed 2018-09-12 01:19 UTC