How to use the planet.SurfacePoint function in planet

def _GetLinkWeight(self, link, pinA, pinB):
        spA = planet.SurfacePoint(radius=1.0, theta=pinA.longitude, phi=pinA.latitude)
        spB = planet.SurfacePoint(radius=1.0, theta=pinB.longitude, phi=pinB.latitude)
        return spA.GetDistanceToOther(spB)

def GetDistanceBetweenPins(pinA, pinB, planetRadius):
    spA = planet.SurfacePoint(radius=planetRadius, theta=pinA.longitude, phi=pinA.latitude)
    spB = planet.SurfacePoint(radius=planetRadius, theta=pinB.longitude, phi=pinB.latitude)
    return spA.GetDistanceToOther(spB)

def _GetLinkWeight(self, link, pinA, pinB):
        spA = planet.SurfacePoint(radius=1.0, theta=pinA.longitude, phi=pinA.latitude)
        spB = planet.SurfacePoint(radius=1.0, theta=pinB.longitude, phi=pinB.latitude)
        return spA.GetDistanceToOther(spB)

def RenderExtractionHeads(self):
        self.RemoveAllHeads()
        for (headID, phi, theta,) in self.pin.heads:
            surfacePoint = planet.SurfacePoint(theta=theta, phi=phi)
            self.AddHead(headID, surfacePoint)

def RenderCommandCentersOfOtherCharacters(self):
        if not settings.user.ui.Get('planetShowOtherCharactersPins', True):
            return 
        commandCenters = self.GetCommandCentersOfOtherCharacters()
        for (charid, cc,) in commandCenters.iteritems():
            if charid == session.charid:
                continue
            sp = planet.SurfacePoint(theta=cc.longitude, phi=cc.latitude)
            pin = planet.ui.OtherPlayersPin(sp, cc.pinID, cc.typeID, cc.ownerID, self.planetUISvc.pinOthersTransform)
            self.otherPlayerPinsByPinID[cc.pinID] = pin

        self.planetUISvc.curveLineDrawer.SubmitLineset('otherLinks')

model.translation = (0.0, 0.0, 1500.0)
            model.rotation = geo2.QuaternionRotationSetYawPitchRoll(math.pi, 0.0, 0.0)
            scene2.objects.append(inclinationRoot)
            ls = trinity.EveCurveLineSet()
            ls.scaling = (1.0, 1.0, 1.0)
            tex2D1 = trinity.TriTexture2DParameter()
            tex2D1.name = 'TexMap'
            tex2D1.resourcePath = 'res:/UI/Texture/Planet/link.dds'
            ls.lineEffect.resources.append(tex2D1)
            tex2D2 = trinity.TriTexture2DParameter()
            tex2D2.name = 'OverlayTexMap'
            tex2D2.resourcePath = 'res:/UI/Texture/Planet/link.dds'
            ls.lineEffect.resources.append(tex2D2)
            lineColor = (1.0, 1.0, 1.0, 0.05)
            p1 = planet.SurfacePoint(0.0, 0.0, -1500.0, 1000.0)
            p2 = planet.SurfacePoint(5.0, 0.0, 1498.0, 1000.0)
            l1 = ls.AddSpheredLineCrt(p1.GetAsXYZTuple(), lineColor, p2.GetAsXYZTuple(), lineColor, (0.0, 0.0, 0.0), 3.0)
            p1 = planet.SurfacePoint(0.0, 0.0, -1500.0, 1000.0)
            p2 = planet.SurfacePoint(-5.0, 0.0, 1498.0, 1000.0)
            l2 = ls.AddSpheredLineCrt(p1.GetAsXYZTuple(), lineColor, p2.GetAsXYZTuple(), lineColor, (0.0, 0.0, 0.0), 3.0)
            animationColor = (0.3, 0.3, 0.3, 0.5)
            ls.ChangeLineAnimation(l1, animationColor, 0.25, 1.0)
            ls.ChangeLineAnimation(l2, animationColor, -0.25, 1.0)
            ls.ChangeLineSegmentation(l1, 100)
            ls.ChangeLineSegmentation(l2, 100)
            ls.SubmitChanges()
            orbitRoot.children.append(ls)

        trinity.WaitForResourceLoads()
        for model in addedObjects:
            model.display = 1

pin = self.GetPin(pinID)
        if not pin:
            raise UserError('PinDoesNotExist')
        if not pin.IsExtractor():
            raise UserError('PinDoesNotHaveHeads')
        if pin.FindHead(headID) is not None:
            raise UserError('CannotAddHeadAlreadyExists')
        if len(pin.heads) >= planetCommon.ECU_MAX_HEADS:
            raise UserError('CannotPlaceHeadLimitReached')
        cpuDelta = pin.GetCpuUsage(numHeads=len(pin.heads) + 1) - pin.GetCpuUsage()
        powerDelta = pin.GetPowerUsage(numHeads=len(pin.heads) + 1) - pin.GetPowerUsage()
        if cpuDelta + self.colonyData.GetColonyCpuUsage() > self.colonyData.GetColonyCpuSupply():
            raise UserError('CannotAddToColonyCPUUsageExceeded', {'typeName': (const.UE_LOC, 'UI/PI/Common/ExtractorHead')})
        if powerDelta + self.colonyData.GetColonyPowerUsage() > self.colonyData.GetColonyPowerSupply():
            raise UserError('CannotAddToColonyPowerUsageExceeded', {'typeName': (const.UE_LOC, 'UI/PI/Common/ExtractorHead')})
        spA = SurfacePoint(radius=self.GetPlanetRadius(), theta=pin.longitude, phi=pin.latitude)
        spB = SurfacePoint(radius=self.GetPlanetRadius(), theta=longitude, phi=latitude)
        angleBetween = spA.GetAngleBetween(spB)
        areaOfInfluence = pin.GetAreaOfInfluence()
        if angleBetween > areaOfInfluence:
            raise UserError('CannotPlaceHeadTooFarAway', {'maxDist': util.FmtDist(areaOfInfluence * self.planet.radius)})
        self.PostValidateAddExtractorHead(pinID, latitude, longitude)

scene2.objects.append(inclinationRoot)
            ls = trinity.EveCurveLineSet()
            ls.scaling = (1.0, 1.0, 1.0)
            tex2D1 = trinity.TriTexture2DParameter()
            tex2D1.name = 'TexMap'
            tex2D1.resourcePath = 'res:/UI/Texture/Planet/link.dds'
            ls.lineEffect.resources.append(tex2D1)
            tex2D2 = trinity.TriTexture2DParameter()
            tex2D2.name = 'OverlayTexMap'
            tex2D2.resourcePath = 'res:/UI/Texture/Planet/link.dds'
            ls.lineEffect.resources.append(tex2D2)
            lineColor = (1.0, 1.0, 1.0, 0.05)
            p1 = planet.SurfacePoint(0.0, 0.0, -1500.0, 1000.0)
            p2 = planet.SurfacePoint(5.0, 0.0, 1498.0, 1000.0)
            l1 = ls.AddSpheredLineCrt(p1.GetAsXYZTuple(), lineColor, p2.GetAsXYZTuple(), lineColor, (0.0, 0.0, 0.0), 3.0)
            p1 = planet.SurfacePoint(0.0, 0.0, -1500.0, 1000.0)
            p2 = planet.SurfacePoint(-5.0, 0.0, 1498.0, 1000.0)
            l2 = ls.AddSpheredLineCrt(p1.GetAsXYZTuple(), lineColor, p2.GetAsXYZTuple(), lineColor, (0.0, 0.0, 0.0), 3.0)
            animationColor = (0.3, 0.3, 0.3, 0.5)
            ls.ChangeLineAnimation(l1, animationColor, 0.25, 1.0)
            ls.ChangeLineAnimation(l2, animationColor, -0.25, 1.0)
            ls.ChangeLineSegmentation(l1, 100)
            ls.ChangeLineSegmentation(l2, 100)
            ls.SubmitChanges()
            orbitRoot.children.append(ls)

        trinity.WaitForResourceLoads()
        for model in addedObjects:
            model.display = 1

def PlaceProbeAtDefaultPosition(self, headID):
        OFFSET = 0.08
        VEC_X = (-1, 0, 0)
        rotAngle = float(headID) / planetCommon.ECU_MAX_HEADS * 2 * math.pi
        ecuVector = self.planetUISvc.myPinManager.pinsByID[self.pin.id].surfacePoint.GetAsXYZTuple()
        normal = geo2.Vec3Cross(ecuVector, VEC_X)
        normal = geo2.Vector(*normal) * OFFSET
        posVec = geo2.Vec3Subtract(ecuVector, normal)
        posVec = geo2.Vec3Normalize(posVec)
        rotMat = geo2.MatrixRotationAxis(ecuVector, rotAngle)
        posVec = geo2.Multiply(rotMat, posVec)
        surfacePoint = planet.SurfacePoint(*posVec)
        self.planetUISvc.myPinManager.PlaceExtractionHead(self.pin.id, headID, surfacePoint, self.currentRadius)
        self.UpdateHeadPosition(headID, surfacePoint)