Import the project

1 files changed, 65 insertions, 0 deletions

diff --git a/controllers/final/final.py b/controllers/final/final.py
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+++ b/controllers/final/final.py
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+from py_trees.composites import Sequence, Parallel
+from py_trees.trees import BehaviourTree
+from py_trees.common import ParallelPolicy, Status
+from setup import robot, timestep
+from arm_controller import MoveArm
+from detector import JarFinder
+from go_back import GoBack
+from gripper import OpenGripper, CloseGripper
+from navigator import ApproachJar, RotateRobot
+from positions import grasp_pos, lift_pos, retract_pos, place_pos, raise_torso, rotate_pos
+from sleep import Sleep
+from constants import JAR_OFFSETS, PG_DIST
+
+# This is the sequence of picking up the jar, placing it, then turning back to
+# the counter. It was placed in a function given its repetitiveness.
+def generate_repeat_sequence(i):
+    id = (i+1, ) # The number to show in the names.
+    seq = Sequence("Moving jar %d"%id, memory=True)
+    seq.add_child(JarFinder("Detect jar %d"%id, "honey jar" if i==1 else "jam jar", JAR_OFFSETS[i]))
+    if i: # Move back to get some space, but only for the 2nd and 3rd jars.
+        seq.add_child(GoBack("Move back for pick up %d"%id, distance=.45))
+    # Pick up sequence.
+    seq.add_child(MoveArm("Grasping pose %d"%id, grasp_pos))
+    seq.add_child(ApproachJar("Approach jar %d"%id))
+    seq.add_child(CloseGripper("Grasp jar %d"%id))
+    seq.add_child(GoBack("Move back after pick up %d"%id, distance=PG_DIST[i]))
+    seq.add_child(MoveArm("Lift arm %d"%id, lift_pos))
+    seq.add_child(MoveArm("Retract the arm after pick up %d"%id, retract_pos))
+    seq.add_child(Sleep(name="Pause to kill the inertia"))
+    # Face the table to place the jars on the table.
+    seq.add_child(RotateRobot("Rotate towards table %d"%id, -2.5))
+    seq.add_child(Sleep(name="Pause to kill the inertia"))
+    # Place the jar on the table.
+    seq.add_child(MoveArm("Releasing pose %d"%id, place_pos))
+    seq.add_child(Sleep(name="Pause to kill the inertia"))
+    seq.add_child(OpenGripper("Release the jar %d"%id))
+    seq.add_child(MoveArm("Raise the torso %d"%id, raise_torso))
+    if i == 2: # There is no need to continue after this for the 3rd jar.
+        return seq # There is no need to continue after this for the 3rd jar.
+    # Return to the kitchen counter to get the next jar.
+    seq.add_child(Sleep(name="Pause to kill the inertia"))
+    seq.add_child(GoBack("Create some space from the table %d"%id, distance=.4 if i else .0))
+    seq.add_child(MoveArm("Retract the arm after placement %d"%id, rotate_pos))
+    seq.add_child(Sleep(name="Pause to kill the inertia"))
+    seq.add_child(RotateRobot("Rotate towards the counter %d"%id, .3))
+    seq.add_child(Sleep(name="Pause to kill the inertia"))
+    return seq
+
+tree = Sequence("Root", memory=True) # The main sequence.
+tree.add_child(
+    Parallel("Initialising", policy=ParallelPolicy.SuccessOnAll(), children=[
+        Sleep(name="Wait for world to stabilise", steps=120),
+        MoveArm("Initialise to the grasp position", grasp_pos),
+        MoveArm("Correct head angle", {"head_2_joint": -.3}), # Better camera angle.
+    ]))
+for i in range(3):
+    tree.add_child(generate_repeat_sequence(i)) # Move the jars one by one.
+tree = BehaviourTree(tree) # BehaviourTree allows better control.
+tree.setup()
+
+while robot.step(timestep) != -1:
+    tree.tick()
+    if tree.root.status in (Status.SUCCESS, Status.FAILURE):
+        print("Tree finished executing with status %s" % tree.root.status)
+        break