WIP: robot movements, adapt Helicopter view to new code

Misc fixes: fix up vector when changing to default view, fix wrong
scale for getPointForLane, fix comment typo in
Robot.thisFunctionDoesAbsolutelyNothing.

New bugs: robot does not look forward; to be done: do not use
static speed.

1 files changed, 34 insertions, 1 deletions

diff --git a/src/Robot.java b/src/Robot.java
index 3fe4377..ba90dea 100644
--- a/src/Robot.java
+++ b/src/Robot.java
@@ -36,6 +36,16 @@ class Robot extends BetterBase {
     private boolean asStickFigure;
 
     /**
+     * Robot speed (on track) in meters per second.
+     */
+    private double speed;
+
+    /**
+     * Location of the robot on the track (in terms of GlobalState time).
+     */
+    private double robot_time_pos;
+
+    /**
      * Constructs the robot with initial parameters.
      */
     public Robot(Material material) {
@@ -308,8 +318,31 @@ class Robot extends BetterBase {
 
     /**
      * This function does nothing, its use is described at the caller in
-     * Rboot.draw().
+     * Robot.draw().
      */
     private void thisFunctionDoesAbsolutelyNothing() {
     }
+
+    /**
+     * Determine the location of the robot on the track.
+     * @return A positive number (time).
+     */
+    public double getTimePos() {
+        return robot_time_pos;
+    }
+
+    /**
+     * Set the speed (meters per second) for this robot.
+     */
+    public void setSpeed(double speed) {
+        this.speed = speed;
+    }
+
+    /**
+     * Move the robot with the number of seconds based on its current speed.
+     */
+    public void walkSome(double seconds) {
+        assert seconds >= 0 : "Robot cannot walk backwards!";
+        robot_time_pos += speed * seconds;
+    }
 }