linetest.py

import pybullet as p
import time
import pybullet_data

p.connect(p.GUI)
p.setAdditionalSearchPath(pybullet_data.getDataPath())
useCollisionShapeQuery = True
p.configureDebugVisualizer(p.COV_ENABLE_GUI, 0)
geom = p.createCollisionShape(p.GEOM_SPHERE, radius=0.1)
geomBox = p.createCollisionShape(p.GEOM_BOX, halfExtents=[0.2, 0.2, 0.2])
baseOrientationB = p.getQuaternionFromEuler([0, 0.3, 0])  #[0,0.5,0.5,0]
basePositionB = [1.5, 0, 1]
obA = -1
obB = -1

obA = p.createMultiBody(baseMass=0, baseCollisionShapeIndex=geom, basePosition=[0.5, 0, 1])
obB = p.createMultiBody(baseMass=0,
                        baseCollisionShapeIndex=geomBox,
                        basePosition=basePositionB,
                        baseOrientation=baseOrientationB)

lineWidth = 3
colorRGB = [1, 0, 0]
lineId = p.addUserDebugLine(lineFromXYZ=[0, 0, 0],
                            lineToXYZ=[0, 0, 0],
                            lineColorRGB=colorRGB,
                            lineWidth=lineWidth,
                            lifeTime=0)
pitch = 0
yaw = 0

while (p.isConnected()):
  pitch += 0.01
  if (pitch >= 3.1415 * 2.):
    pitch = 0
  yaw += 0.01
  if (yaw >= 3.1415 * 2.):
    yaw = 0

  baseOrientationB = p.getQuaternionFromEuler([yaw, pitch, 0])
  if (obB >= 0):
    p.resetBasePositionAndOrientation(obB, basePositionB, baseOrientationB)

  if (useCollisionShapeQuery):
    pts = p.getClosestPoints(bodyA=-1,
                             bodyB=-1,
                             distance=100,
                             collisionShapeA=geom,
                             collisionShapeB=geomBox,
                             collisionShapePositionA=[0.5, 0, 1],
                             collisionShapePositionB=basePositionB,
                             collisionShapeOrientationB=baseOrientationB)
    #pts = p.getClosestPoints(bodyA=obA, bodyB=-1, distance=100, collisionShapeB=geomBox, collisionShapePositionB=basePositionB, collisionShapeOrientationB=baseOrientationB)
  else:
    pts = p.getClosestPoints(bodyA=obA, bodyB=obB, distance=100)

  if len(pts) > 0:
    #print(pts)
    distance = pts[0][8]
    #print("distance=",distance)
    ptA = pts[0][5]
    ptB = pts[0][6]
    p.addUserDebugLine(lineFromXYZ=ptA,
                       lineToXYZ=ptB,
                       lineColorRGB=colorRGB,
                       lineWidth=lineWidth,
                       lifeTime=0,
                       replaceItemUniqueId=lineId)
  time.sleep(1./240.)

#removeCollisionShape is optional:
#only use removeCollisionShape if the collision shape is not used to create a body
#and if you want to keep on creating new collision shapes for different queries (not recommended)
p.removeCollisionShape(geom)
p.removeCollisionShape(geomBox)