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mayamaya-api

Maya c++ API, parenting one object to another?

I am learning the maya c++ API, and am stuck on the simplest task.

i have an object (a locator):

MObject locatorObj = dagModifier.createNode("transform");
MObject locShapeObj = dagModifier.createNode("locator", locatorObj);
dagModifier.renameNode(locatorObj, "root");
dagModifier.renameNode(locShapeObj, "rootShape");

and another:

//root loc
MObject locatorObj2 = dagModifier.createNode("transform");
MObject locShapeObj2 = dagModifier.createNode("locator", locatorObj);
dagModifier.renameNode(locatorObj2, "root2");
dagModifier.renameNode(locShapeObj2, "root2Shape");

I want to parent the second underneath the first. I have tried:

//parent t
MStatus status;
MFnDagNode fnRoot(locatorObj);

status = fnRoot.addChild(locatorObj2, MFnDagNode::kNextPos, true);

But Maya crashes when i run it. Am i right in using MFnDagNode here? I have also tried:

MFnTransform rootTransform (locatorObj);
status = rootTransform.addChild(locatorObj2, MFnDagNode::kNextPos, true);

But i also get the crash. Where am i going wrong? Thank you.

Solution

  • i ended up using joints instead of locators. This works:

    MFnIkJoint* rootJoint = new MFnIkJoint();
MObject rootTransform = rootJoint->create(MObject::kNullObj, &status);

MFnIkJoint* Joint = new MFnIkJoint();
MObject Transform = Joint->create(MObject::kNullObj, &status);

MStatus status = rootJoint ->addChild(Transform , MFnDagNode::kNextPos, false);