BooleanOperations

Functions to corefine triangulated surface meshes and compute triangulated surface meshes of the union, difference and intersection of the bounded volumes.

Target: CGALPlugin

namespace: cgal

parents:

• DataEngine

Data

Name	Description	Default value
name	object name	unnamed
printLog	if true, emits extra messages at runtime.	0
tags	list of the subsets the object belongs to
bbox	this object bounding box
componentState	The state of the component among (Dirty, Valid, Undefined, Loading, Invalid).	Undefined
listening	if true, handle the events, otherwise ignore the events	0
operation	Boolean operation	union
Inputs
position1	Input positions of the first mesh
position2	Input positions of the second mesh
triangles1	Input triangles of the first mesh
triangles2	Input triangles of the second mesh
computeDistrubution	If true, computes outputIndices1 and outputIndices2	1
Outputs
outputPosition	Output positions of the surface mesh
outputTriangles	Output triangles of the surface mesh
outputPosition1	Output positions of transformation on the first surface mesh
outputTriangles1	Output triangles of transformation on the first surface mesh
outputPosition2	Output positions of transformation on the second surface mesh
outputTriangles2	Output triangles of transformation on the second surface mesh
outputIndices1	Indices of the surface mesh points that are on the first object
outputIndices2	Indices of the surface mesh points that are on the second object

Links

Name	Description	Destination type name
context	Graph Node containing this object (or BaseContext::getDefault() if no graph is used)	BaseContext
slaves	Sub-objects used internally by this object	BaseObject
master	nullptr for regular objects, or master object for which this object is one sub-objects	BaseObject

Examples

BooleanOperations.scn

XMLPython

<?xml version="1.0"?>
<Node name="root" gravity="0 0 0" dt="1"  >
    <RequiredPlugin pluginName="CGALPlugin"/>
  <RequiredPlugin pluginName='SofaOpenglVisual'/>

    <VisualStyle displayFlags="showWireframe showVisual" />

    <Node name="Mesh1">
        <MeshOBJLoader name="loader" filename="mesh/cube.obj" translation="50 50 50" scale="50"/>
        <OglModel src="@loader" color="1 0 0"/>
    </Node>

    <Node name="Mesh2">
        <MeshOBJLoader name="loader" filename="mesh/sphere_05.obj"/>
        <OglModel src="@loader" color="0 1 0"/>
    </Node>

    <Node name="Union">
        <BooleanOperations name="engine" position1="@../Mesh1/loader.position" triangles1="@../Mesh1/loader.triangles"
                                                                         position2="@../Mesh2/loader.position" triangles2="@../Mesh2/loader.triangles"
                                                                         operation="union"/>
        <MeshTopology position="@engine.outputPosition" triangles="@engine.outputTriangles"/>
        <OglModel color="0 0 1" translation="200 0 0"/>
    </Node>

    <Node name="Intersection">
        <BooleanOperations name="engine" position1="@../Mesh1/loader.position" triangles1="@../Mesh1/loader.triangles"
                                                                         position2="@../Mesh2/loader.position" triangles2="@../Mesh2/loader.triangles"
                                                                         operation="intersection"/>
        <MeshTopology position="@engine.outputPosition" triangles="@engine.outputTriangles"/>
        <OglModel color="0 0 1" translation="375 0 0"/>
    </Node>

    <Node name="Difference1">
        <BooleanOperations name="engine" position1="@../Mesh1/loader.position" triangles1="@../Mesh1/loader.triangles"
                                                                         position2="@../Mesh2/loader.position" triangles2="@../Mesh2/loader.triangles"
                                                                         operation="difference"/>
        <MeshTopology position="@engine.outputPosition" triangles="@engine.outputTriangles"/>
        <OglModel color="0 0 1" translation="500 0 0"/>
    </Node>

    <Node name="Difference2">
        <BooleanOperations name="engine" position1="@../Mesh2/loader.position" triangles1="@../Mesh2/loader.triangles"
                                                                         position2="@../Mesh1/loader.position" triangles2="@../Mesh1/loader.triangles"
                                                                         operation="difference"/>
        <MeshTopology position="@engine.outputPosition" triangles="@engine.outputTriangles"/>
        <OglModel color="0 0 1" translation="700 0 0"/>
    </Node>

</Node>

def createScene(root_node):

   root = root_node.addChild('root', gravity="0 0 0", dt="1")

   root.addObject('RequiredPlugin', pluginName="CGALPlugin")
   root.addObject('RequiredPlugin', pluginName="SofaOpenglVisual")
   root.addObject('VisualStyle', displayFlags="showWireframe showVisual")

   mesh1 = root.addChild('Mesh1')

   mesh1.addObject('MeshOBJLoader', name="loader", filename="mesh/cube.obj", translation="50 50 50", scale="50")
   mesh1.addObject('OglModel', src="@loader", color="1 0 0")

   mesh2 = root.addChild('Mesh2')

   mesh2.addObject('MeshOBJLoader', name="loader", filename="mesh/sphere_05.obj")
   mesh2.addObject('OglModel', src="@loader", color="0 1 0")

   union = root.addChild('Union')

   union.addObject('BooleanOperations', name="engine", position1="@../Mesh1/loader.position", triangles1="@../Mesh1/loader.triangles", position2="@../Mesh2/loader.position", triangles2="@../Mesh2/loader.triangles", operation="union")
   union.addObject('MeshTopology', position="@engine.outputPosition", triangles="@engine.outputTriangles")
   union.addObject('OglModel', color="0 0 1", translation="200 0 0")

   intersection = root.addChild('Intersection')

   intersection.addObject('BooleanOperations', name="engine", position1="@../Mesh1/loader.position", triangles1="@../Mesh1/loader.triangles", position2="@../Mesh2/loader.position", triangles2="@../Mesh2/loader.triangles", operation="intersection")
   intersection.addObject('MeshTopology', position="@engine.outputPosition", triangles="@engine.outputTriangles")
   intersection.addObject('OglModel', color="0 0 1", translation="375 0 0")

   difference1 = root.addChild('Difference1')

   difference1.addObject('BooleanOperations', name="engine", position1="@../Mesh1/loader.position", triangles1="@../Mesh1/loader.triangles", position2="@../Mesh2/loader.position", triangles2="@../Mesh2/loader.triangles", operation="difference")
   difference1.addObject('MeshTopology', position="@engine.outputPosition", triangles="@engine.outputTriangles")
   difference1.addObject('OglModel', color="0 0 1", translation="500 0 0")

   difference2 = root.addChild('Difference2')

   difference2.addObject('BooleanOperations', name="engine", position1="@../Mesh2/loader.position", triangles1="@../Mesh2/loader.triangles", position2="@../Mesh1/loader.position", triangles2="@../Mesh1/loader.triangles", operation="difference")
   difference2.addObject('MeshTopology', position="@engine.outputPosition", triangles="@engine.outputTriangles")
   difference2.addObject('OglModel', color="0 0 1", translation="700 0 0")