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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/** \file
* \ingroup obj
*/
#pragma once
#include "BLI_utility_mixins.hh"
#include "DNA_curve_types.h"
namespace blender::io::obj {
/**
* Provides access to the a Curve Object's properties.
* Only #CU_NURBS type is supported.
*
* \note Used for Curves to be exported in parameter form, and not converted to meshes.
*/
class OBJCurve : NonCopyable {
private:
const Object *export_object_eval_;
const Curve *export_curve_;
float world_axes_transform_[4][4];
public:
OBJCurve(const Depsgraph *depsgraph, const OBJExportParams &export_params, Object *curve_object);
const char *get_curve_name() const;
int total_splines() const;
/**
* \param spline_index: Zero-based index of spline of interest.
* \return: Total vertices in a spline.
*/
int total_spline_vertices(int spline_index) const;
/**
* Get coordinates of the vertex at the given index on the given spline.
*/
float3 vertex_coordinates(int spline_index, int vertex_index, float scaling_factor) const;
/**
* Get total control points of the NURBS spline at the given index. This is different than total
* vertices of a spline.
*/
int total_spline_control_points(int spline_index) const;
/**
* Get the degree of the NURBS spline at the given index.
*/
int get_nurbs_degree(int spline_index) const;
/**
* Get the U flags (CU_NURB_*) of the NURBS spline at the given index.
*/
short get_nurbs_flagu(int spline_index) const;
private:
/**
* Set the final transform after applying axes settings and an Object's world transform.
*/
void set_world_axes_transform(eTransformAxisForward forward, eTransformAxisUp up);
};
} // namespace blender::io::obj
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