Add Roadrunner

TeamCode/drive/opmode/TrackWidthTuner.java

@@ -0,0 +1,88 @@
+package org.firstinspires.ftc.teamcode.drive.opmode;
+
+import com.acmerobotics.dashboard.FtcDashboard;
+import com.acmerobotics.dashboard.config.Config;
+import com.acmerobotics.dashboard.telemetry.MultipleTelemetry;
+import com.acmerobotics.roadrunner.geometry.Pose2d;
+import com.acmerobotics.roadrunner.util.Angle;
+import com.qualcomm.robotcore.eventloop.opmode.Autonomous;
+import com.qualcomm.robotcore.eventloop.opmode.LinearOpMode;
+import com.qualcomm.robotcore.util.MovingStatistics;
+
+import org.firstinspires.ftc.robotcore.external.Telemetry;
+import org.firstinspires.ftc.robotcore.internal.system.Misc;
+import org.firstinspires.ftc.teamcode.drive.DriveConstants;
+import org.firstinspires.ftc.teamcode.drive.SampleMecanumDrive;
+
+/*
+ * This routine determines the effective track width. The procedure works by executing a point turn
+ * with a given angle and measuring the difference between that angle and the actual angle (as
+ * indicated by an external IMU/gyro, track wheels, or some other localizer). The quotient
+ * given angle / actual angle gives a multiplicative adjustment to the estimated track width
+ * (effective track width = estimated track width * given angle / actual angle). The routine repeats
+ * this procedure a few times and averages the values for additional accuracy. Note: a relatively
+ * accurate track width estimate is important or else the angular constraints will be thrown off.
+ */
+@Config
+@Autonomous(group = "drive")
+public class TrackWidthTuner extends LinearOpMode {
+    public static double ANGLE = 180; // deg
+    public static int NUM_TRIALS = 5;
+    public static int DELAY = 1000; // ms
+
+    @Override
+    public void runOpMode() throws InterruptedException {
+        Telemetry telemetry = new MultipleTelemetry(this.telemetry, FtcDashboard.getInstance().getTelemetry());
+
+        SampleMecanumDrive drive = new SampleMecanumDrive(hardwareMap);
+        // TODO: if you haven't already, set the localizer to something that doesn't depend on
+        // drive encoders for computing the heading
+
+        telemetry.addLine("Press play to begin the track width tuner routine");
+        telemetry.addLine("Make sure your robot has enough clearance to turn smoothly");
+        telemetry.update();
+
+        waitForStart();
+
+        if (isStopRequested()) return;
+
+        telemetry.clearAll();
+        telemetry.addLine("Running...");
+        telemetry.update();
+
+        MovingStatistics trackWidthStats = new MovingStatistics(NUM_TRIALS);
+        for (int i = 0; i < NUM_TRIALS; i++) {
+            drive.setPoseEstimate(new Pose2d());
+
+            // it is important to handle heading wraparounds
+            double headingAccumulator = 0;
+            double lastHeading = 0;
+
+            drive.turnAsync(Math.toRadians(ANGLE));
+
+            while (!isStopRequested() && drive.isBusy()) {
+                double heading = drive.getPoseEstimate().getHeading();
+                headingAccumulator += Angle.normDelta(heading - lastHeading);
+                lastHeading = heading;
+
+                drive.update();
+            }
+
+            double trackWidth = DriveConstants.TRACK_WIDTH * Math.toRadians(ANGLE) / headingAccumulator;
+            trackWidthStats.add(trackWidth);
+
+            sleep(DELAY);
+        }
+
+        telemetry.clearAll();
+        telemetry.addLine("Tuning complete");
+        telemetry.addLine(Misc.formatInvariant("Effective track width = %.2f (SE = %.3f)",
+                trackWidthStats.getMean(),
+                trackWidthStats.getStandardDeviation() / Math.sqrt(NUM_TRIALS)));
+        telemetry.update();
+
+        while (!isStopRequested()) {
+            idle();
+        }
+    }
+}