def firstStep(indAnt, curve, vel, isFlat=True, ground=None):
"""Initialise the simulation
This function initialises the settings at the beginning of the simulation.
"""
speed = np.linalg.norm(vel)
curveStartPoint = up.getPosCurvePoint(curve, 0.01)
tan = up.getTanCurvePoint(curve, 0.01)
yAngle = up.getAngle(tan)
comTrajList = []
comTrajList.append(curveStartPoint)
triList = []
newTri = tr.createNewTriTemplate(curveStartPoint, True, yRot=yAngle)
newTri = tr.plotTri(newTri, isFlat=isFlat, ground=ground)
triList.append(newTri)
strideLen = tr.triangleSpeed(speed)
newTri = tr.createNewTriTemplate(curveStartPoint + strideLen/2*tan, False, yRot=yAngle)
newTri = tr.plotTri(newTri, isFlat=isFlat, ground=ground)
triList.append(newTri)
diffCOM = np.average(triList[1], 0) - np.average(triList[0], 0)
curTriRight = triList[1] - diffCOM
up.animateBodyLeg(indAnt, curveStartPoint, up.mergeTwoTripod(triList[0], curTriRight))
jointLTList = []
jointRTList = []
jointLT, jointRT = fe.solveJointAngles(curveStartPoint + [0, 0, -0.1], triList[0], triList[1], True)
jointLTList.append(jointLT)
jointRTList.append(jointRT)
return comTrajList, triList, jointLTList, jointRTList
def getNextCurvePoint(curve, curveArray, curTriCOM, speed):
"""Compute the next point along the curve, with the distance of stride length
"""
strideLen = triangleSpeed(speed)
lenToP = up.getLenToP(curve)
indMin = findClosestPointOnCurve(curveArray, curTriCOM)
minP = cmds.getAttr( curve+'.minValue' )
maxP = cmds.getAttr( curve+'.maxValue' )
numInd = len(curveArray)
pCurve = indMin/numInd*(maxP-minP)
pCurve = pCurve + strideLen*lenToP
nextPos = up.getPosCurvePoint(curve, pCurve)
nextTan = up.getTanCurvePoint(curve, pCurve)
nextC = up.getCurvatureCurvePoint(curve, pCurve)
return np.hstack((nextPos, nextTan, nextC))