127 lines
4.8 KiB
C++
127 lines
4.8 KiB
C++
// SPDX-License-Identifier: LGPL-2.1-or-later
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/***************************************************************************
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* Copyright (c) 2005 Imetric 3D GmbH *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#ifndef BASE_VIEWPROJ_H
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#define BASE_VIEWPROJ_H
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#include "Matrix.h"
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namespace Base
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{
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template<typename T>
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class Vector3;
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using Vector3d = Vector3<double>;
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/**
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* Abstract base class for all project methods.
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*/
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class BaseExport ViewProjMethod
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{
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public:
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ViewProjMethod(const ViewProjMethod&) = default;
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ViewProjMethod(ViewProjMethod&&) = default;
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ViewProjMethod& operator=(const ViewProjMethod&) = default;
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ViewProjMethod& operator=(ViewProjMethod&&) = default;
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virtual ~ViewProjMethod() = default;
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virtual bool isValid() const;
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/** Convert 3D point to 2D projection plane */
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virtual Vector3f operator()(const Vector3f& rclPt) const = 0;
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/** Convert 3D point to 2D projection plane */
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virtual Vector3d operator()(const Vector3d& rclPt) const = 0;
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/** Convert a 2D point on the projection plane in 3D space */
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virtual Vector3f inverse(const Vector3f& rclPt) const = 0;
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/** Convert a 2D point on the projection plane in 3D space */
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virtual Vector3d inverse(const Vector3d& rclPt) const = 0;
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/** Calculate the projection (+ mapping) matrix */
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virtual Matrix4D getProjectionMatrix() const = 0;
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/** Calculate the composed projection matrix */
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Matrix4D getComposedProjectionMatrix() const;
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/** Apply an additional transformation to the input points */
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void setTransform(const Base::Matrix4D&);
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const Base::Matrix4D& getTransform() const
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{
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return transform;
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}
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protected:
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ViewProjMethod();
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void transformInput(const Base::Vector3f&, Base::Vector3f&) const;
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void transformInput(const Base::Vector3d&, Base::Vector3d&) const;
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private:
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bool hasTransform {false};
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Base::Matrix4D transform;
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};
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/**
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* The ViewProjMatrix class returns the result of the multiplication
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* of the 3D vector and the view transformation matrix.
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*/
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class BaseExport ViewProjMatrix: public ViewProjMethod
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{
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public:
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explicit ViewProjMatrix(const Matrix4D& rclMtx);
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Vector3f operator()(const Vector3f& inp) const override;
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Vector3d operator()(const Vector3d& inp) const override;
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Vector3f inverse(const Vector3f& src) const override;
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Vector3d inverse(const Vector3d& src) const override;
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Matrix4D getProjectionMatrix() const override;
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private:
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bool isOrthographic;
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Matrix4D _clMtx, _clMtxInv;
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};
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/**
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* The ViewOrthoProjMatrix class returns the result of the multiplication
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* of the 3D vector and the transformation matrix.
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* Unlike ViewProjMatrix this class is not supposed to project points onto
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* a viewport but project points onto a plane in 3D.
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*/
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class BaseExport ViewOrthoProjMatrix: public ViewProjMethod
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{
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public:
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explicit ViewOrthoProjMatrix(const Matrix4D& rclMtx);
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Vector3f operator()(const Vector3f& rclPt) const override;
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Vector3d operator()(const Vector3d& rclPt) const override;
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Vector3f inverse(const Vector3f& rclPt) const override;
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Vector3d inverse(const Vector3d& rclPt) const override;
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Matrix4D getProjectionMatrix() const override;
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private:
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Matrix4D _clMtx, _clMtxInv;
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};
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} // namespace Base
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#endif // BASE_VIEWPROJ_H
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