diff --git a/docs/pybullet_quickstart_guide/PlainPreview/Article.md.html b/docs/pybullet_quickstart_guide/PlainPreview/Article.md.html new file mode 100644 index 000000000..a46f9227e --- /dev/null +++ b/docs/pybullet_quickstart_guide/PlainPreview/Article.md.html @@ -0,0 +1,10 @@ + +Hello Markdeep! + +- Hello +- lists! + +Hello MathJax: +\[f(0)=\frac{1}{2\cdot\pi\cdot i}\cdot \oint_{|z|=1} \frac{f(z)}{z} \textrm{d}z\] + + diff --git a/docs/pybullet_quickstart_guide/PlainPreview/BuildMarkdeepUtility.py b/docs/pybullet_quickstart_guide/PlainPreview/BuildMarkdeepUtility.py new file mode 100644 index 000000000..16793346e --- /dev/null +++ b/docs/pybullet_quickstart_guide/PlainPreview/BuildMarkdeepUtility.py @@ -0,0 +1,43 @@ +import re + +if(__name__=="__main__"): + # Assemble the script which embeds the Markdeep page into the preview blog + PreviewBlogPage=open("PreviewBlogPage.htm","rb").read().decode("utf-8"); + HeadMatch=re.search("(.*?)",PreviewBlogPage,re.DOTALL); + HeadAttributes=HeadMatch.group(1); + FullDocumentHead=HeadMatch.group(2); + BodyMatch=re.search("(.*?)",PreviewBlogPage,re.DOTALL); + BodyAttributes=BodyMatch.group(1); + FullPreviewBody=BodyMatch.group(2); + ArticleHTMLCodeMacro="$(ARTICLE_HTML_CODE)"; + iArticleHTMLCodeMacro=FullPreviewBody.find(ArticleHTMLCodeMacro); + DocumentBodyPrefix=FullPreviewBody[0:iArticleHTMLCodeMacro]; + DocumentBodySuffix=FullPreviewBody[iArticleHTMLCodeMacro+len(ArticleHTMLCodeMacro):]; + FullPrepareHTMLCode=open("PrepareHTML.js","rb").read().decode("utf-8"); + ReplacementList=[ + ("$(FULL_DOCUMENT_HEAD)",FullDocumentHead), + ("$(DOCUMENT_BODY_PREFIX)",DocumentBodyPrefix), + ("$(DOCUMENT_BODY_SUFFIX)",DocumentBodySuffix) + ]; + for Macro,Replacement in ReplacementList: + FullPrepareHTMLCode=FullPrepareHTMLCode.replace(Macro,Replacement.replace("\r\n","\\r\\n\\\r\n").replace("'","\\'")); + # Generate code which sets body and head attributes appropriately + for Element,AttributeCode in [("head",HeadAttributes),("body",BodyAttributes)]: + FullPrepareHTMLCode+="\r\n// Setting "+Element+" attributes\r\n"; + for Match in re.finditer("(\\w+)=\\\"(.*?)\\\"",AttributeCode): + FullPrepareHTMLCode+="document."+Element+".setAttribute(\""+Match.group(1)+"\",\""+Match.group(2)+"\");\r\n"; + open("PrepareHTML.full.js","wb").write(FullPrepareHTMLCode.encode("utf-8")); + + # Concatenate all the scripts together + SourceFileList=[ + "PrepareHTML.full.js", + "SetMarkdeepMode.js", + "markdeep.min.js", + "DisplayMarkdeepOutput.js", + "InvokeMathJax.js" + ]; + OutputCode="\r\n\r\n".join(["// "+SourceFile+"\r\n\r\n"+open(SourceFile,"rb").read().decode("utf-8") for SourceFile in SourceFileList]); + OutputFile=open("MarkdeepUtility.js","wb"); + OutputFile.write(OutputCode.encode("utf-8")); + OutputFile.close(); + print("Done."); diff --git a/docs/pybullet_quickstart_guide/PlainPreview/DisplayMarkdeepOutput.js b/docs/pybullet_quickstart_guide/PlainPreview/DisplayMarkdeepOutput.js new file mode 100644 index 000000000..9549abf40 --- /dev/null +++ b/docs/pybullet_quickstart_guide/PlainPreview/DisplayMarkdeepOutput.js @@ -0,0 +1,6 @@ +BodyHTML=document.body.innerHTML; +BeginTag=""; +EndTag=""; +BodyHTML=BodyHTML.slice(BodyHTML.indexOf(BeginTag)+BeginTag.length,BodyHTML.lastIndexOf(EndTag)); +document.getElementById("BodyDisplayBox").textContent=BodyHTML; +document.head.innerHTML=FullDocumentHead; diff --git a/docs/pybullet_quickstart_guide/PlainPreview/InvokeMathJax.js b/docs/pybullet_quickstart_guide/PlainPreview/InvokeMathJax.js new file mode 100644 index 000000000..ab400c11a --- /dev/null +++ b/docs/pybullet_quickstart_guide/PlainPreview/InvokeMathJax.js @@ -0,0 +1,4 @@ +var MathjaxScript=document.createElement("script"); +MathjaxScript.type="text/javascript"; +MathjaxScript.src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"; +document.head.appendChild(MathjaxScript); diff --git a/docs/pybullet_quickstart_guide/PlainPreview/MarkdeepUtility.js b/docs/pybullet_quickstart_guide/PlainPreview/MarkdeepUtility.js new file mode 100644 index 000000000..76eb5def1 --- /dev/null +++ b/docs/pybullet_quickstart_guide/PlainPreview/MarkdeepUtility.js @@ -0,0 +1,152 @@ +// PrepareHTML.full.js + +/** Converts <>&" to their HTML escape sequences */ +function escapeHTMLEntities(str) { + return String(str).replace(/&/g, '&').replace(//g, '>').replace(/"/g, '"'); +} + + +/** Restores the original source string's '<' and '>' as entered in + the document, before the browser processed it as HTML. There is no + way in an HTML document to distinguish an entity that was entered + as an entity.*/ +function unescapeHTMLEntities(str) { + // Process & last so that we don't recursively unescape + // escaped escape sequences. + return str. + replace(/</g, '<'). + replace(/>/g, '>'). + replace(/"/g, '"'). + replace(/'/g, "'"). + replace(/–/g, '--'). + replace(/—/g, '---'). + replace(/&/g, '&'); +} + + +/** + \param node A node from an HTML DOM + + \return A String that is a very good reconstruction of what the + original source looked like before the browser tried to correct + it to legal HTML. + */ +function nodeToMarkdeepSource(node, leaveEscapes) { + var source = node.innerHTML; + + // Markdown uses e-mail syntax, which HTML parsing + // will try to close by inserting the matching close tags at the end of the + // document. Remove anything that looks like that and comes *after* + // the first fallback style. + source = source.replace(/(?:\r\n\ +\r\n\ + \r\n\ + \r\n\ + \ +'; + +// This code is placed at the beginning of the body before the Markdeep code. +// $ (DOCUMENT_BODY_PREFIX) is everything in the body of PreviewBlogPage.htm up to +// $ (ARTICLE_HTML_CODE). +DocumentBodyPrefix='\ +\r\n\ +\ + \ +
\
+';
+// This code is placed at the end of the body after the Markdeep code. 
+// $ (DOCUMENT_BODY_SUFFIX) is everything in the body of PreviewBlogPage.htm after 
+// $ (ARTICLE_HTML_CODE).
+DocumentBodySuffix='\
+	
\ + \ +
Document <body> code:
\ +
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"}),k(document.getElementsByClassName("markdeep")).concat(k(document.getElementsByTagName("markdeep"))).forEach(function(e){var t=document.createElement("div");t.innerHTML=v(w(o(e.innerHTML)),!0),e.parentNode.replaceChild(t,e)}),void(document.head.innerHTML=window.markdeep.stylesheet()+document.head.innerHTML)}ee||(k(document.getElementsByTagName("script")).forEach(function(e){N(e.src)&&e.parentNode.removeChild(e)}),document.body.style.visibility="hidden");var re=u(document.body);if(ee){re=re.rp(/ + + + **PyBullet Quickstart Guide** + [Erwin Coumans](http://twitter.com/erwincoumans), [Google Brain Robotics](https://research.google.com/teams/brain/robotics), + [Yunfei Bai](http://yunfei-bai.com), [X](https://x.company), + + + +Introduction +====================================================================================== + +pybullet is an easy to use Python module for physics simulation for robotics, games, visual effects and machine learning. With pybullet you can load articulated bodies from URDF, SDF, MJCF and other file formats. pybullet provides forward dynamics simulation, inverse dynamics computation, forward and inverse kinematics, collision detection and ray intersection queries. The Bullet Physics SDK includes pybullet robotic examples such as a simulated Minitaur quadruped, humanoids running using TensorFlow inference and KUKA arms grasping objects. + +![[CoRL VR BotLab demo](https://github.com/erwincoumans/pybullet_robots/tree/master/corl_demo) + ](images/CoRL_VR_demo.png width="80%" border="2") + +Aside from physics simulation, there are bindings to rendering, with a CPU renderer (TinyRenderer) and OpenGL visualization and support for Virtual Reality headsets such as HTC Vive and Oculus Rift. pybullet also has functionality to perform collision detection queries (closest points, overlapping pairs, ray intersection test etc) and to add debug rendering (debug lines and text). pybullet has cross-platform built-in client-server support for shared memory, UDP and TCP networking. So you can run pybullet on Linux connecting to a Windows VR server. + +pybullet wraps the new Bullet C-API, which is designed to be independent from the underlying physics engine and render engine, so we can easily migrate to newer versions of Bullet, or use a different physics engine or render engine. By default, pybullet uses the Bullet 2.x API on the CPU. We will expose Bullet 3.x running on GPU using OpenCL as well. There is also a C++ API similar to pybullet, see b3RobotSimulatorClientAPI. + +pybullet can be easily used with TensorFlow and frameworks such as OpenAI Gym. Researchers from Google Brain [1,2], X, Stanford AI Lab and OpenAI use pybullet/Bullet C-API. + +The installation of pybullet is as simple as (sudo) pip install pybullet (Python 2.x), pip3 install pybullet. This will expose the pybullet module as well as pybullet_envs Gym environments. + +Hello pybullet World + +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ python +import pybullet as p +import pybullet_data +physicsClient = p.connect(p.GUI)#or p.DIRECT for non-graphical version +p.setAdditionalSearchPath(pybullet_data.getDataPath()) #used by loadURDF +p.setGravity(0,0,-10) +planeId = p.loadURDF("plane.urdf") +cubeStartPos = [0,0,1] +cubeStartOrientation = p.getQuaternionFromEuler([0,0,0]) +boxId = p.loadURDF("r2d2.urdf",cubeStartPos, cubeStartOrientation) +p.stepSimulation() +cubePos, cubeOrn = p.getBasePositionAndOrientation(boxId) +print(cubePos,cubeOrn) +p.disconnect() +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +connect, disconnect +-------------------------------------------------------------------------------------------- +After importing the pybullet module, the first thing to do is 'connecting' to the physics simulation. pybullet is designed around a client-server driven API, with a client sending commands and a physics server returning the status. pybullet has some built-in physics servers: DIRECT and GUI. Both GUI and DIRECT connections will execute the physics simulation and rendering in the same process as pybullet. + +Note that in DIRECT mode you cannot access the OpenGL and VR hardware features, as described in the "Virtual Reality" and "Debug GUI, Lines, Text, Parameters" chapters. DIRECT mode does allow rendering of images using the built-in software renderer through the 'getCameraImage' API. This can be useful for running simulations in the cloud on servers without GPU. + +You can provide your own data files, or you can use the pybullet_data package that ships with pybullet. For this, import pybullet_data and register the directory using pybullet.setAdditionalSearchPath(pybullet_data.getDataPath()). + +getConnectionInfo +-------------------------------------------------------------------------------------------- +Given a physicsClientId will return the list [isConnected, connectionMethod] + +connect using DIRECT, GUI +-------------------------------------------------------------------------------------------- + +The DIRECT connection sends the commands directly to the physics engine, without using any transport layer and no graphics visualization window, and directly returns the status after executing the command. + +The GUI connection will create a new graphical user interface (GUI) with 3D OpenGL rendering, within the same process space as pybullet. On Linux and Windows this GUI runs in a separate thread, while on OSX it runs in the same thread due to operating system limitations. On Mac OSX you may see a spinning wheel in the OpenGL Window, until you run a 'stepSimulation' or other pybullet command. +The commands and status messages are sent between pybullet client and the GUI physics simulation server using an ordinary memory buffer. + +It is also possible to connect to a physics server in a different process on the same machine or on a remote machine using SHARED_MEMORY, UDP or TCP networking. See the section about Shared Memory, UDP and TCP for details. + +Unlike almost all other methods, this method doesn't parse keyword arguments, due to backward compatibility. + +The connect input arguments are: + + +| field | name | type | description | +|----------|---------------------------------|-----------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| +| required | connection mode | integer: DIRECT, GUI, SHARED_MEMORY, UDP, TCP | DIRECT mode create a new physics engine and directly communicates with it. GUI will create a physics engine with graphical GUI frontend and communicates with it. SHARED_MEMORY will connect to an existing physics engine process on the same machine, and communicates with it over shared memory. TCP or UDP will connect to an existing physics server over TCP or UDP networking. | +| optional | key | int | in SHARED_MEMORY mode, optional shared memory key. When starting ExampleBrowser or SharedMemoryPhysics_* you can use optional command-line --shared_memory_key to set the key. This allows to run multiple servers on the same machine. | +| optional | UdpNetworkAddress (UDP and TCP) | string | IP address or host name, for example "127.0.0.1" or "localhost" or "mymachine.domain.com" | +| optional | UdpNetworkPort (UDP and TCP) | integer | UDP port number. Default UDP port is 1234, default TCP port is 6667 (matching the defaults in the server) | +| optional | options | string | command-line option passed into the GUI server. At the moment, only the --opengl2 flag is enabled: by default, Bullet uses OpenGL3, but some environments such as virtual machines or remote desktop clients only support OpenGL2. Only one command-line argument can be passed on at the moment. | + +connect returns a physics client id or -1 if not connected. The physics client Id is an optional argument to most of the other pybullet commands. If you don't provide it, it will assume physics client id = 0. You can connect to multiple different physics servers, except for GUI. + +For example: + +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ python +pybullet.connect(pybullet.DIRECT) +pybullet.connect(pybullet.GUI, options="--opengl2") +pybullet.connect(pybullet.SHARED_MEMORY,1234) +pybullet.connect(pybullet.UDP,"192.168.0.1") +pybullet.connect(pybullet.UDP,"localhost", 1234) +pybullet.connect(pybullet.TCP,"localhost", 6667) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +connect using Shared Memory +-------------------------------------------------------------------------------------------- +There are a few physics servers that allow shared memory connection: the App_SharedMemoryPhysics, App_SharedMemoryPhysics_GUI and the Bullet Example Browser has one example under Experimental/Physics Server that allows shared memory connection. This will let you execute the physics simulation and rendering in a separate process. + +You can also connect over shared memory to the App_SharedMemoryPhysics_VR, the Virtual Reality application with support for head-mounted display and 6-dof tracked controllers such as HTC Vive and Oculus Rift with Touch controllers. Since the Valve OpenVR SDK only works properly under Windows, the App_SharedMemoryPhysics_VR can only be build under Windows using premake (preferably) or cmake. + +connect using UDP or TCP networking +-------------------------------------------------------------------------------------------- +For UDP networking, there is a App_PhysicsServerUDP that listens to a certain UDP port. It uses the open source enet library for reliable UDP networking. This allows you to execute the physics simulation and rendering on a separate machine. For TCP pybullet uses the clsocket library. This can be useful when using SSH tunneling from a machine behind a firewall to a robot simulation. For example you can run a control stack or machine learning using pybullet on Linux, while running the physics server on Windows in Virtual Reality using HTC Vive or Rift. + +One more UDP application is the App_PhysicsServerSharedMemoryBridgeUDP application that acts as a bridge to an existing physics server: you can connect over UDP to this bridge, and the bridge connects to a physics server using shared memory: the bridge passes messages between client and server. In a similar way there is a TCP version (replace UDP by TCP). + +Note: at the moment, both client and server need to be either 32bit or 64bit builds! + +disconnect +-------------------------------------------------------------------------------------------- +You can disconnect from a physics server, using the physics client Id returned by the connect call (if non-negative). A 'DIRECT' or 'GUI' physics server will shutdown. A separate (out-of-process) physics server will keep on running. See also 'resetSimulation' to remove all items. + +Parameters of disconnect: + +| field | name | type | description | +|----------|-----------------|------|---------------------------------------------------------------------| +| optional | physicsClientId | int | if you connect to multiple physics servers, you can pick which one. | + +setGravity +-------------------------------------------------------------------------------------------- +By default, there is no gravitational force enabled. setGravity lets you set the default gravity force for all objects. +The setGravity input parameters are: (no return value) + +| field | name | type | description | +|----------|-----------------|-------|---------------------------------------------------------------------| +| required | gravityX | float | gravity force along the X world axis | +| required | gravityY | float | gravity force along the Y world axis | +| required | gravityZ | float | gravity force along the Z world axis | +| required | physicsClientId | int | if you connect to multiple physics servers, you can pick which one. | + + +loadURDF +-------------------------------------------------------------------------------------------- +The loadURDF will send a command to the physics server to load a physics model from a Universal Robot Description File (URDF). The URDF file is used by the ROS project (Robot Operating System) to describe robots and other objects, it was created by the WillowGarage and the Open Source Robotics Foundation (OSRF). Many robots have public URDF files, you can find a description and tutorial here: http://wiki.ros.org/urdf/Tutorials + +Important note: most joints (slider, revolute, continuous) have motors enabled by default that prevent free motion. This is similar to a robot joint with a very high-friction harmonic drive. You should set the joint motor control mode and target settings using pybullet.setJointMotorControl2. See the setJointMotorControl2 API for more information. + +Warning: by default, pybullet will cache some files to speed up loading. You can disable file caching using setPhysicsEngineParameter(enableFileCaching=0). + +The loadURDF arguments are: + + +| option | name | type | description | +|----------|-----------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| +| required | fileName | string | a relative or absolute path to the URDF file on the file system of the physics server. | +| optional | basePosition | vec3 | create the base of the object at the specified position in world space coordinates [X,Y,Z] | +| optional | baseOrientation | vec4 | create the base of the object at the specified orientation as world space quaternion [X,Y,Z,W] | +| optional | useMaximalCoordinates | int | Experimental. By default, the joints in the URDF file are created using the reduced coordinate method: the joints are simulated using the Featherstone Articulated Body algorithm (btMultiBody in Bullet 2.x). The useMaximalCoordinates option will create a 6 degree of freedom rigid body for each link, and constraints between those rigid bodies are used to model joints. | +| optional | useFixedBase | int | force the base of the loaded object to be static | +| optional | flags | int | URDF_USE_INERTIA_FROM_FILE: by default, Bullet recomputed the inertia tensor based on mass and volume of the collision shape. If you can provide more accurate inertia tensor, use this flag.URDF_USE_SELF_COLLISION: by default, Bullet disables self-collision. This flag let's you enable it. You can customize the self-collision behavior using the following flags: URDF_USE_SELF_COLLISION_EXCLUDE_PARENT will discard self-collision between links that are directly connected (parent and child).URDF_USE_SELF_COLLISION_EXCLUDE_ALL_PARENTS will discard self-collisions between a child link and any of its ancestors (parents, parents of parents, up to the base). | +| optional | globalScaling | float | globalScaling will apply a scale factor to the URDF model. | +| optional | physicsClientId | int | if you are connected to multiple servers, you can pick one. | +loadURDF returns a body unique id, a non-negative integer value. If the URDF file cannot be loaded, this integer will be negative and not a valid body unique id. + +loadBullet, loadSDF, loadMJCF +-------------------------------------------------------------------------------------------- +You can also load objects from other file formats, such as .bullet, .sdf and .mjcf. Those file formats support multiple objects, so the return value is a list of object unique ids. The SDF format is explained in detail at http://sdformat.org. The loadSDF command only extracts some essential parts of the SDF related to the robot models and geometry, and ignores many elements related to cameras, lights and so on. The loadMJCF command performs basic import of MuJoCo MJCF xml files, used in OpenAI Gym. See also the Important note under loadURDF related to default joint motor settings, and make sure to use setJointMotorControl2. + + +| option | name | type | description | +|----------|-----------------------|--------|-------------------------------------------------------------------------------------------------------------------------------| +| required | fileName | string | a relative or absolute path to the URDF file on the file system of the physics server. | +| optional | useMaximalCoordinates | int | Experimental. See loadURDF for more details. | +| optional | globalScaling | float | every object will be scaled using this scale factor (including links, link frames, joint attachments and linear joint limits) | +| optional | physicsClientId | int | if you are connected to multiple servers, you can pick one. | + +loadBullet, loadSDF and loadMJCF will return an array of object unique ids: + +| name | type | description | +|-----------------|-------------|----------------------------------------------------------------| +| objectUniqueIds | list of int | the list includes the object unique id for each object loaded. | + + +createCollisionShape/VisualShape +-------------------------------------------------------------------------------------------- +Although the recommended and easiest way to create stuff in the world is using the loading functions (loadURDF/SDF/MJCF/Bullet), you can also create collision and visual shapes programmatically and use them to create a multi body using createMultiBody. See the createMultiBodyLinks.py and createVisualShape.py example in the Bullet Physics SDK. + +The input parameters for createCollisionShape are + +| option | name | type | description | +|----------|-----------------|-----------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| +| required | shapeType | int | GEOM_SPHERE, GEOM_BOX, GEOM_CAPSULE, GEOM_CYLINDER, GEOM_PLANE, GEOM_MESH | +| optional | radius | float | default 0.5: GEOM_SPHERE, GEOM_CAPSULE, GEOM_CYLINDER | +| optional | halfExtents | vec3 list of 3 floats | default [1,1,1]: for GEOM_BOX | +| optional | height | float | default: 1: for GEOM_CAPSULE, GEOM_CYLINDER | +| optional | fileName | string | Filename for GEOM_MESH, currently only Wavefront .obj. Will create convex hulls for each object (marked as 'o') in the .obj file. | +| optional | meshScale | vec3 list of 3 floats | default: [1,1,1], for GEOM_MESH | +| optional | planeNormal | vec3 list of 3 floats | default: [0,0,1] for GEOM_PLANE | +| optional | flags | int | GEOM_FORCE_CONCAVE_TRIMESH: for GEOM_MESH, this will create a concave static triangle mesh. This should not be used with dynamic / moving objects, only for static (mass = 0) terrain. | +| optional | physicsClientId | int | If you are connected to multiple servers, you can pick one. | + +The return value is a non-negative int unique id for the collision shape or -1 if the call failed. + +createVisualShape +-------------------------------------------------------------------------------------------- +You can create a visual shape in a similar way to creating a collision shape, with some additional arguments to control the visual appearance, such as diffuse and specular color. When you use the GEOM_MESH type, you can point to a Wavefront OBJ file, and the visual shape will parse some parameters from the material file (.mtl) and load a texture. Note that large textures (above 1024x1024 pixels) can slow down the loading and run-time performance. + +The input parameters are + +| option | name | type | description | +|----------|------------------------|------------------------|-----------------------------------------------------------------------------------------------------------------------------------| +| required | shapeType | int | GEOM_SPHERE, GEOM_BOX, GEOM_CAPSULE, GEOM_CYLINDER, GEOM_PLANE, GEOM_MESH | +| optional | radius | float | default 0.5: GEOM_SPHERE, GEOM_CAPSULE, GEOM_CYLINDER | +| optional | halfExtents | vec3 list of 3 floats | default [1,1,1]: for GEOM_BOX | +| optional | height | float | default: 1: for GEOM_CAPSULE, GEOM_CYLINDER | +| optional | fileName | string | Filename for GEOM_MESH, currently only Wavefront .obj. Will create convex hulls for each object (marked as 'o') in the .obj file. | +| optional | meshScale | vec3 list of 3 floats | default: [1,1,1], for GEOM_MESH | +| optional | planeNormal | vec3 list of 3 floats | default: [0,0,1] for GEOM_PLANE | +| optional | flags | int | unused at the moment | +| optional | rgbaColor | vec4, list of 4 floats | color components for red, green, blue and alpha, each in range [0..1]. | +| optional | specularColor | vec3, list of 3 floats | specular reflection color, red, green, blue components in range [0..1] | +| optional | visualFramePosition | vec3, list of 3 floats | translational offset of the visual shape with respect to the link frame | +| optional | visualFrameOrientation | vec4, list of 4 floats | rotational offset (quaternion x,y,z,w) of the visual shape with respect to the link frame | +| optional | physicsClientId | int | If you are connected to multiple servers, you can pick one. | + +The return value is a non-negative int unique id for the visual shape or -1 if the call failed. + +createMultiBody +-------------------------------------------------------------------------------------------- +Although the easiest way to create stuff in the world is using the loading functions (loadURDF/SDF/MJCF/Bullet), you can create a multi body using createMultiBody. +See the createMultiBodyLinks.py example in the Bullet Physics SDK. The parameters of createMultiBody are very similar to URDF and SDF parameters. + +You can create a multi body with only a single base without joints/child links or you can create a multi body with joints/child links. If you provide links, make sure the size of every list is the same (len(linkMasses) == len(linkCollisionShapeIndices) etc). The input parameters for createMultiBody are: + +| option | name | type | description | +|----------|-------------------------------|------------------------|---------------------------------------------------------------------------------------------------------------------------| +| optional | baseMass | float | mass of the base, in kg (if using SI units) | +| optional | baseCollisionShapeIndex | int | unique id from createCollisionShape or -1. You can re-use the collision shape for multiple multibodies (instancing) | +| optional | baseVisualShapeIndex | int | unique id from createVisualShape or -1. You can reuse the visual shape (instancing) | +| optional | basePosition | vec3, list of 3 floats | Cartesian world position of the base | +| optional | baseOrientation | vec4, list of 4 floats | Orientation of base as quaternion [x,y,z,w] | +| optional | baseInertialFramePosition | vec3, list of 3 floats | Local position of inertial frame | +| optional | baseInertialFrameOrientation | vec4, list of 4 floats | Local orientation of inertial frame, [x,y,z,w] | +| optional | linkMasses | list of float | List of the mass values, one for each link. | +| optional | linkCollisionShapeIndices | list of int | List of the unique id, one for each link. | +| optional | linkVisualShapeIndices | list of int | list of the visual shape unique id for each link | +| optional | linkPositions | list of vec3 | list of local link positions, with respect to parent | +| optional | linkOrientations | list of vec4 | list of local link orientations, w.r.t. parent | +| optional | linkInertialFramePositions | list of vec3 | list of local inertial frame pos. in link frame | +| optional | linkInertialFrameOrientations | list of vec4 | list of local inertial frame orn. in link frame | +| optional | linkParentIndices | list of int | Link index of the parent link or 0 for the base. | +| optional | linkJointTypes | list of int | list of joint types, one for each link. Only JOINT_REVOLUTE, JOINT_PRISMATIC, and JOINT_FIXED is supported at the moment. | +| optional | linkJointAxis | list of vec3 | Joint axis in local frame | +| optional | useMaximalCoordinates | int | experimental, best to leave it 0/false. | +| optional | physicsClientId | int | If you are connected to multiple servers, you can pick one. | + + +The return value of createMultiBody is a non-negative unique id or -1 for failure. Example: + +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ python +cuid = pybullet.createCollisionShape(pybullet.GEOM_BOX, halfExtents = [1, 1, 1]) +mass= 0 #static box +pybullet.createMultiBody(mass,cuid) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +See also createMultiBodyLinks.py, createObstacleCourse.py and createVisualShape.py in the Bullet/examples/pybullet/examples folder. + +saveWorld +-------------------------------------------------------------------------------------------- +You can create a snapshot of the current world as a pybullet Python file, stored on the server. saveWorld can be useful as a basic editing feature, setting up the robot, joint angles, object positions and environment for example in VR. Later you can just load the pybullet Python file to re-create the world. Note that not all settings are stored in the world file at the moment. +The input arguments are: + +| option | name | type | description | +|----------|----------------|--------|------------------------------------------------------------| +| required | fileName | string | filename of the pybullet file. | +| optional | clientServerId | int | if you are connected to multiple servers, you can pick one | + +stepSimulation +-------------------------------------------------------------------------------------------- +stepSimulation will perform all the actions in a single forward dynamics simulation step such as collision detection, constraint solving and integration. + +stepSimulation input arguments are optional: + +| option | name | type | description | +|----------|-----------------|------|-------------------------------------------------------------| +| optional | physicsClientId | int | if you are connected to multiple servers, you can pick one. | + + + + + + + + + + + + + + diff --git a/docs/pybullet_quickstart_guide/WordpressPreview/Article.md.html b/docs/pybullet_quickstart_guide/WordpressPreview/Article.md.html new file mode 100644 index 000000000..a46f9227e --- /dev/null +++ b/docs/pybullet_quickstart_guide/WordpressPreview/Article.md.html @@ -0,0 +1,10 @@ + +Hello Markdeep! + +- Hello +- lists! + +Hello MathJax: +\[f(0)=\frac{1}{2\cdot\pi\cdot i}\cdot \oint_{|z|=1} \frac{f(z)}{z} \textrm{d}z\] + + diff --git a/docs/pybullet_quickstart_guide/WordpressPreview/BuildMarkdeepUtility.py b/docs/pybullet_quickstart_guide/WordpressPreview/BuildMarkdeepUtility.py new file mode 100644 index 000000000..16793346e --- /dev/null +++ b/docs/pybullet_quickstart_guide/WordpressPreview/BuildMarkdeepUtility.py @@ -0,0 +1,43 @@ +import re + +if(__name__=="__main__"): + # Assemble the script which embeds the Markdeep page into the preview blog + PreviewBlogPage=open("PreviewBlogPage.htm","rb").read().decode("utf-8"); + HeadMatch=re.search("(.*?)",PreviewBlogPage,re.DOTALL); + HeadAttributes=HeadMatch.group(1); + FullDocumentHead=HeadMatch.group(2); + BodyMatch=re.search("(.*?)",PreviewBlogPage,re.DOTALL); + BodyAttributes=BodyMatch.group(1); + FullPreviewBody=BodyMatch.group(2); + ArticleHTMLCodeMacro="$(ARTICLE_HTML_CODE)"; + iArticleHTMLCodeMacro=FullPreviewBody.find(ArticleHTMLCodeMacro); + DocumentBodyPrefix=FullPreviewBody[0:iArticleHTMLCodeMacro]; + DocumentBodySuffix=FullPreviewBody[iArticleHTMLCodeMacro+len(ArticleHTMLCodeMacro):]; + FullPrepareHTMLCode=open("PrepareHTML.js","rb").read().decode("utf-8"); + ReplacementList=[ + ("$(FULL_DOCUMENT_HEAD)",FullDocumentHead), + ("$(DOCUMENT_BODY_PREFIX)",DocumentBodyPrefix), + ("$(DOCUMENT_BODY_SUFFIX)",DocumentBodySuffix) + ]; + for Macro,Replacement in ReplacementList: + FullPrepareHTMLCode=FullPrepareHTMLCode.replace(Macro,Replacement.replace("\r\n","\\r\\n\\\r\n").replace("'","\\'")); + # Generate code which sets body and head attributes appropriately + for Element,AttributeCode in [("head",HeadAttributes),("body",BodyAttributes)]: + FullPrepareHTMLCode+="\r\n// Setting "+Element+" attributes\r\n"; + for Match in re.finditer("(\\w+)=\\\"(.*?)\\\"",AttributeCode): + FullPrepareHTMLCode+="document."+Element+".setAttribute(\""+Match.group(1)+"\",\""+Match.group(2)+"\");\r\n"; + open("PrepareHTML.full.js","wb").write(FullPrepareHTMLCode.encode("utf-8")); + + # Concatenate all the scripts together + SourceFileList=[ + "PrepareHTML.full.js", + "SetMarkdeepMode.js", + "markdeep.min.js", + "DisplayMarkdeepOutput.js", + "InvokeMathJax.js" + ]; + OutputCode="\r\n\r\n".join(["// "+SourceFile+"\r\n\r\n"+open(SourceFile,"rb").read().decode("utf-8") for SourceFile in SourceFileList]); + OutputFile=open("MarkdeepUtility.js","wb"); + OutputFile.write(OutputCode.encode("utf-8")); + OutputFile.close(); + print("Done."); diff --git a/docs/pybullet_quickstart_guide/WordpressPreview/DisplayMarkdeepOutput.js b/docs/pybullet_quickstart_guide/WordpressPreview/DisplayMarkdeepOutput.js new file mode 100644 index 000000000..9549abf40 --- /dev/null +++ b/docs/pybullet_quickstart_guide/WordpressPreview/DisplayMarkdeepOutput.js @@ -0,0 +1,6 @@ +BodyHTML=document.body.innerHTML; +BeginTag=""; +EndTag=""; +BodyHTML=BodyHTML.slice(BodyHTML.indexOf(BeginTag)+BeginTag.length,BodyHTML.lastIndexOf(EndTag)); +document.getElementById("BodyDisplayBox").textContent=BodyHTML; +document.head.innerHTML=FullDocumentHead; diff --git a/docs/pybullet_quickstart_guide/WordpressPreview/InvokeMathJax.js b/docs/pybullet_quickstart_guide/WordpressPreview/InvokeMathJax.js new file mode 100644 index 000000000..ab400c11a --- /dev/null +++ b/docs/pybullet_quickstart_guide/WordpressPreview/InvokeMathJax.js @@ -0,0 +1,4 @@ +var MathjaxScript=document.createElement("script"); +MathjaxScript.type="text/javascript"; +MathjaxScript.src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"; +document.head.appendChild(MathjaxScript); diff --git a/docs/pybullet_quickstart_guide/WordpressPreview/MarkdeepUtility.js b/docs/pybullet_quickstart_guide/WordpressPreview/MarkdeepUtility.js new file mode 100644 index 000000000..7ee5183b3 --- /dev/null +++ b/docs/pybullet_quickstart_guide/WordpressPreview/MarkdeepUtility.js @@ -0,0 +1,4680 @@ +// PrepareHTML.full.js + +/** Converts <>&" to their HTML escape sequences */ +function escapeHTMLEntities(str) { + return String(str).replace(/&/g, '&').replace(//g, '>').replace(/"/g, '"'); +} + + +/** Restores the original source string's '<' and '>' as entered in + the document, before the browser processed it as HTML. There is no + way in an HTML document to distinguish an entity that was entered + as an entity.*/ +function unescapeHTMLEntities(str) { + // Process & last so that we don't recursively unescape + // escaped escape sequences. + return str. + replace(/</g, '<'). + replace(/>/g, '>'). + replace(/"/g, '"'). + replace(/'/g, "'"). + replace(/–/g, '--'). + replace(/—/g, '---'). + replace(/&/g, '&'); +} + + +/** + \param node A node from an HTML DOM + + \return A String that is a very good reconstruction of what the + original source looked like before the browser tried to correct + it to legal HTML. + */ +function nodeToMarkdeepSource(node, leaveEscapes) { + var source = node.innerHTML; + + // Markdown uses e-mail syntax, which HTML parsing + // will try to close by inserting the matching close tags at the end of the + // document. Remove anything that looks like that and comes *after* + // the first fallback style. + source = source.replace(/(?:\r\n\ +\r\n\ + \r\n\ + \r\n\ +\r\n\ + \r\n\ +\r\n\ +\r\n\ +\r\n\ +\r\n\ + \r\n\ +\ +'; + +// This code is placed at the beginning of the body before the Markdeep code. +// $ (DOCUMENT_BODY_PREFIX) is everything in the body of PreviewBlogPage.htm up to +// $ (ARTICLE_HTML_CODE). +DocumentBodyPrefix='\ +\r\n\ +
\r\n\ + \r\n\ + \r\n\ +\r\n\ +
\r\n\ +\r\n\ +
\r\n\ +\r\n\ +
\r\n\ +
\r\n\ +\r\n\ + \r\n\ +
\r\n\ +\r\n\ +

Blog post preview

\r\n\ +
\r\n\ +
\r\n\ +\r\n\ +\ + \ +
\
+';
+// This code is placed at the end of the body after the Markdeep code. 
+// $ (DOCUMENT_BODY_SUFFIX) is everything in the body of PreviewBlogPage.htm after 
+// $ (ARTICLE_HTML_CODE).
+DocumentBodySuffix='\
+	
\ + \ +
Document <body> code:
\ +
\ +\r\n\ +\r\n\ +
\r\n\ +
\r\n\ +
\r\n\ +\r\n\ +
\r\n\ +
\r\n\ +
\r\n\ +\r\n\ +
\r\n\ +

Not a live webpage

\r\n\ + \r\n\ + \r\n\ + \r\n\ +
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