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#include "SimpleTreeCreator.hpp"
#include <cstdio>
namespace btInverseDynamics {
/// minimal "tree" (chain)
SimpleTreeCreator::SimpleTreeCreator(int dim) : m_num_bodies(dim) {
m_mass = 1.0;
m_body_T_parent_ref(0, 0) = 1;
m_body_T_parent_ref(0, 1) = 0;
m_body_T_parent_ref(0, 2) = 0;
m_body_T_parent_ref(1, 0) = 0;
m_body_T_parent_ref(1, 1) = 1;
m_body_T_parent_ref(1, 2) = 0;
m_body_T_parent_ref(2, 0) = 0;
m_body_T_parent_ref(2, 1) = 0;
m_body_T_parent_ref(2, 2) = 1;
m_parent_r_parent_body_ref(0) = 1.0;
m_parent_r_parent_body_ref(1) = 0.0;
m_parent_r_parent_body_ref(2) = 0.0;
m_body_r_body_com(0) = 0.5;
m_body_r_body_com(1) = 0.0;
m_body_r_body_com(2) = 0.0;
m_body_I_body(0, 0) = 1;
m_body_I_body(0, 1) = 0;
m_body_I_body(0, 2) = 0;
m_body_I_body(1, 0) = 0;
m_body_I_body(1, 1) = 1;
m_body_I_body(1, 2) = 0;
m_body_I_body(2, 0) = 0;
m_body_I_body(2, 1) = 0;
m_body_I_body(2, 2) = 1;
m_axis(0) = 0;
m_axis(1) = 0;
m_axis(2) = 1;
}
int SimpleTreeCreator::getNumBodies(int* num_bodies) const {
*num_bodies = m_num_bodies;
return 0;
}
int SimpleTreeCreator::getBody(const int body_index, int* parent_index, JointType* joint_type,
vec3* parent_r_parent_body_ref, mat33* body_T_parent_ref,
vec3* body_axis_of_motion, idScalar* mass, vec3* body_r_body_com,
mat33* body_I_body, int* user_int, void** user_ptr) const {
*parent_index = body_index - 1;
if (body_index % 2) {
*joint_type = PRISMATIC;
} else {
*joint_type = REVOLUTE;
}
*parent_r_parent_body_ref = m_parent_r_parent_body_ref;
if (0 == body_index) {
(*parent_r_parent_body_ref)(2) = 1.0;
}
*body_T_parent_ref = m_body_T_parent_ref;
*body_axis_of_motion = m_axis;
*mass = m_mass;
*body_r_body_com = m_body_r_body_com;
*body_I_body = m_body_I_body;
*user_int = 0;
*user_ptr = 0;
return 0;
}
}
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