Skeleton Tutorial SourceCode

#include <ObjectTypes/TriangleMesh/TriangleMesh.hh>
#include <OpenFlipper/BasePlugin/PluginFunctions.hh>

#include <ACG/Math/GLMatrixT.hh>
#include <ObjectTypes/Skeleton/Skeleton.hh>
#include <ObjectTypes/Skeleton/BaseSkin.hh>


void skeletonTutorial2() {
  
  int objectId = -1;
  
  emit addEmptyObject( DATA_SKELETON, objectId );

  SkeletonObject* skeletonObject;
  if ( !PluginFunctions::getObject(objectId, skeletonObject) ) {
    emit log(LOGERR,"Unable to create new Skeleton");
    return;
  }

  Skeleton* skeleton = PluginFunctions::skeleton(skeletonObject);

  //setup the topology
  Skeleton::Joint* currentParent = 0;
  int jointCount = 3;

  for (int i=0; i < jointCount; i++){
    std::string     jointName = QString("Joint" + QString::number(i)).toStdString();
    Skeleton::Joint* newJoint = new Skeleton::Joint(currentParent, jointName );
    skeleton->addJoint(currentParent, newJoint);
    currentParent = newJoint;
  }
  
  //set positions for the reference pose
  Skeleton::Pose* refPose = skeleton->referencePose();
  double xOffset = 0.0;
  
  for (Skeleton::Iterator it = skeleton->begin(); it != skeleton->end(); ++it){
    refPose->setGlobalTranslation( (*it)->id(), ACG::Vec3d(xOffset, 0.0, 0.0) );
    xOffset += 1.0;
  }
  
  //add an animation
  int frameCount = 100;
  
  FrameAnimationT<ACG::Vec3d>* animation = new FrameAnimationT<ACG::Vec3d>(skeleton, frameCount);
  AnimationHandle animHandle = skeleton->addAnimation("Rotation", animation);
  skeleton->animation(animHandle)->setFps(25);
  
  //set position in every pose/frame of the animation
  Skeleton::Joint* middleJoint = skeleton->joint(1);
  ACG::GLMatrixd rotationMatrix;
  
  rotationMatrix.identity();
  double maxAngle = 90.0;
  ACG::Vec3d axis(0.0, 0.0, 1.0);

  for (int i=0; i < frameCount; i++){
    animHandle.setFrame(i);

    Skeleton::Pose* pose = skeleton->pose(animHandle);

    for (Skeleton::Iterator it = skeleton->begin(); it != skeleton->end(); ++it)
      pose->setGlobalTranslation( (*it)->id(), refPose->globalTranslation( (*it)->id() ) );

    rotationMatrix.rotate( maxAngle / frameCount, axis);
    pose->setGlobalMatrix(     middleJoint->id(), rotationMatrix, false );
    pose->setGlobalTranslation(middleJoint->id(), refPose->globalTranslation( middleJoint->id() ), false );
  }

  //add a mesh
  objectId = -1;
  emit addEmptyObject( DATA_TRIANGLE_MESH, objectId );

  TriMeshObject* meshObject;
  if ( !PluginFunctions::getObject(objectId,meshObject) ) {
    emit log(LOGERR,"Unable to create new Mesh");
    return;
  }

  TriMesh* mesh = PluginFunctions::triMesh(meshObject);
  
  //add skin-weights property on the mesh
  OpenMesh::VPropHandleT< BaseSkin::SkinWeights > propWeights;
  mesh->add_property(propWeights, SKIN_WEIGHTS_PROP);

  int steps = 50;

  for (int i=0; i < jointCount; i++)
  for (int j=0; j < steps;      j++){
    double xPos = (j / double(steps-1));
    TriMesh::VertexHandle vh1 = mesh->add_vertex( ACG::Vec3d(i + xPos,  0.1, 0.0) );
    TriMesh::VertexHandle vh2 = mesh->add_vertex( ACG::Vec3d(i + xPos, -0.1, 0.0) );

    mesh->property(propWeights, vh1)[ i ] = 1.0 - xPos;
    mesh->property(propWeights, vh2)[ i ] = 1.0 - xPos;

    if ( i != 2 ){
      mesh->property(propWeights, vh1)[ i+1 ] = xPos;
      mesh->property(propWeights, vh2)[ i+1 ] = xPos;
    } else
      break;
  }


  RPC::callFunctionValue<bool, int, int>("skeletalanimation", "attachSkin", skeletonObject->id(), meshObject->id());

  emit updatedObject(skeletonObject->id(), UPDATE_ALL);
  emit updatedObject(meshObject->id(), UPDATE_ALL);
  PluginFunctions::setDrawMode( ACG::SceneGraph::DrawModes::POINTS );
  PluginFunctions::viewAll();
}