Frogger.java
import objectdraw.*;
import java.awt.*;
/**
* WHAT?
* @author WHO?
*/
public class Frogger extends WindowController{
// Constants defining the sizes of the highway components.
private static final double HIGHWAY_LENGTH = 700;
private static final double LANE_WIDTH = 100;
private static final int NUM_LANES = 4;
private static final double HIGHWAY_WIDTH = LANE_WIDTH * NUM_LANES;
private static final double LINE_WIDTH = LANE_WIDTH / 10;
// Constants defining the locations of the highway components
private static final double HIGHWAY_LEFT = 50;
private static final double HIGHWAY_RIGHT = HIGHWAY_LEFT + HIGHWAY_LENGTH;
private static final double HIGHWAY_TOP = 100;
private static final double HIGHWAY_BOTTOM = HIGHWAY_TOP + HIGHWAY_WIDTH;
// Constants describing the lines on the highway
private static final double LINE_SPACING = LINE_WIDTH / 2;
private static final double DASH_LENGTH = LANE_WIDTH / 3;
private static final double DASH_SPACING = DASH_LENGTH / 2;
/**
* This method currently just draws the highway. You will have to add instructions to create
* the frog and the Lane ActiveObjects.
*/
public void begin() {
// Draw the background
FilledRect highway = new FilledRect (HIGHWAY_LEFT, HIGHWAY_TOP,
HIGHWAY_LENGTH, HIGHWAY_WIDTH, canvas);
// Draw the lane dividers
int whichLine = 1;
while (whichLine < NUM_LANES) {
if (whichLine == NUM_LANES / 2) {
// The middle line is a no passing line
drawNoPassingLine (HIGHWAY_TOP + (whichLine * LANE_WIDTH) -
(LINE_SPACING / 2 + LINE_WIDTH));
} else {
drawPassingLine (HIGHWAY_TOP + (whichLine * LANE_WIDTH) - (LINE_WIDTH / 2));
}
whichLine = whichLine + 1;
}
// ADD YOUR CODE TO CREATE THE FROG AND THE LANES
}
/**
* Draws a pair of solid yellow lines to represent a no passing divider between lanes
* @param y - the top of the top line
*
* YOU SHOULD NOT NEED TO MODIFY THIS METHOD
*/
private void drawNoPassingLine (double y) {
// Draw the solid dividing lines
FilledRect topLine = new FilledRect (HIGHWAY_LEFT, y,
HIGHWAY_LENGTH, LINE_WIDTH, canvas);
topLine.setColor (Color.yellow);
FilledRect bottomLine = new FilledRect (HIGHWAY_LEFT, y + LINE_WIDTH + LINE_SPACING,
HIGHWAY_LENGTH, LINE_WIDTH, canvas);
bottomLine.setColor (Color.yellow);
}
/**
* Draws a dashed white line to represent a passing line dividing two lanes of traffic
* @param y - the y-coordinate of the top of the line.
*
* YOU SHOULD NOT NEED TO MODIFY THIS METHOD
*/
private void drawPassingLine (double y) {
double x = HIGHWAY_LEFT;
FilledRect dash;
while (x < HIGHWAY_RIGHT) {
// Draw the next dash.
dash = new FilledRect (x, y, DASH_LENGTH, LINE_WIDTH, canvas);
dash.setColor (Color.white);
x = x + DASH_LENGTH + DASH_SPACING;
}
}
/**
* Note: Use onMousePress rather than onMouseClick to decide when to move the frog
* STUDENTS: Add a useful comment before turning in program!!
* @param point - location where mouse pressed
*/
public void onMousePress(Location point) {
}
}
