codegen-rnea.py

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from pycppad import (
    AD,
    ADCG,
    CG,
    Independent,
    Value,
    ADCGFun,
    CodeHandler,
    LanguageC,
    LangCDefaultVariableNameGenerator,
)
import pinocchio.cppadcg as cgpin
import pinocchio as pin
import numpy as np
 
pinmodel = pin.buildSampleModelHumanoidRandom()
model = cgpin.Model(pinmodel)
data = model.createData()
 
nq = model.nq
nv = model.nv
 
x = np.array([ADCG(CG(0.0))] * (nq + nv + nv))
x[:nq] = cgpin.neutral(model)
Independent(x)
 
y = cgpin.rnea(model, data, x[:nq], x[nq : nq + nv], x[nq + nv :])
 
fun = ADCGFun(x, y)
 
# /***************************************************************************
# *                        Generate the C source code
# **************************************************************************/
 
# /**
# * start the special steps for source code generation for a Jacobian
# */
handler = CodeHandler(50)
 
indVars = np.array([CG(1.0)] * (nq + nv + nv))
handler.makeVariables(indVars)
 
jac = fun.Jacobian(indVars)
 
langC = LanguageC("double", 3)
nameGen = LangCDefaultVariableNameGenerator("y", "x", "v", "array", "sarray")
code = handler.generateCode(langC, jac, nameGen, "source")
print(code)