MStatus splineSolverNode::preSolve() { MStatus stat; setRotatePlane(false); setSingleChainOnly(true); setPositionOnly(false); //Get Handle MIkHandleGroup * handle_group = handleGroup(); if (NULL == handle_group) { return MS::kFailure; } MObject handle = handle_group->handle( 0 ); MDagPath handlePath = MDagPath::getAPathTo( handle ); fnHandle.setObject( handlePath ); //Get Curve MPlug inCurvePlug = fnHandle.findPlug( "inCurve" ); MDataHandle curveHandle = inCurvePlug.asMDataHandle(); MObject inputCurveObject = curveHandle.asNurbsCurveTransformed(); curveFn.setObject( inputCurveObject ); float initCurveLength = curveFn.length(); MVector initNormal = curveFn.normal(0); MVector initTangent = curveFn.tangent(0); float stretchRatio = 1; // Get the position of the end_effector // MDagPath effectorPath; fnHandle.getEffector(effectorPath); tran.setObject( effectorPath ); // Get the start joint position // MDagPath startJointPath; fnHandle.getStartJoint( startJointPath ); joints.clear(); //Get Joints while (true) { effectorPath.pop(); joints.push_back( effectorPath ); if (effectorPath == startJointPath) break; } std::reverse(joints.begin(), joints.end()); if (!fnHandle.hasAttribute("str")) { //Add Custom Attributes to Handle MFnNumericAttribute fnAttr; MObject attr = fnAttr.create("stretchRatio", "str", MFnNumericData::kDouble, stretchRatio); fnAttr.setKeyable(1); fnAttr.setWritable(1); fnAttr.setMin(0); fnAttr.setMax(1); fnAttr.setHidden(0); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); attr = fnAttr.create("anchorPosition", "ancp", MFnNumericData::kDouble, 0.0); fnAttr.setKeyable(1); fnAttr.setWritable(1); fnAttr.setMin(0); fnAttr.setMax(1); fnAttr.setHidden(0); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); attr = fnAttr.create("curveLength", "cvLen", MFnNumericData::kDouble, initCurveLength); fnAttr.setKeyable(0); fnAttr.setWritable(1); fnAttr.setHidden(1); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); attr = fnAttr.create("initNormal", "norm", MFnNumericData::k3Double); fnAttr.setDefault(initNormal.x, initNormal.y, initNormal.z); fnAttr.setKeyable(0); fnAttr.setWritable(1); fnAttr.setHidden(1); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); attr = fnAttr.create("initTangent", "tang", MFnNumericData::k3Double); fnAttr.setDefault(initTangent.x, initTangent.y, initTangent.z); fnAttr.setKeyable(0); fnAttr.setWritable(1); fnAttr.setHidden(1); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); attr = fnAttr.create("jointsLength", "jsLen", MFnNumericData::kDouble, getJointsTotalLenght()); fnAttr.setKeyable(0); fnAttr.setWritable(1); fnAttr.setHidden(1); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); attr = fnAttr.create("startTwist", "strtw", MFnNumericData::kDouble, 0.0); fnAttr.setKeyable(1); fnAttr.setWritable(1); fnAttr.setHidden(0); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); attr = fnAttr.create("endTwist", "endtw", MFnNumericData::kDouble, 0.0); fnAttr.setKeyable(1); fnAttr.setWritable(1); fnAttr.setHidden(0); fnAttr.setStorable(1); fnAttr.setReadable(1); fnHandle.addAttribute(attr, MFnDependencyNode::kLocalDynamicAttr); MObject twistRamp = MRampAttribute::createCurveRamp("twistRamp", "twr"); fnHandle.addAttribute(twistRamp, MFnDependencyNode::kLocalDynamicAttr); MObject scaleRamp = MRampAttribute::createCurveRamp("scaleRamp", "scr"); fnHandle.addAttribute(scaleRamp, MFnDependencyNode::kLocalDynamicAttr); } else { MPlug strPlug = fnHandle.findPlug("str"); stretchRatio = strPlug.asDouble(); } return MS::kSuccess; }