mirror of https://github.com/KLayout/klayout.git
93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
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/*
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KLayout Layout Viewer
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Copyright (C) 2006-2020 Matthias Koefferlein
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef HDR_layD25ViewUtils
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#define HDR_layD25ViewUtils
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#include "layPluginCommon.h"
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#include <QVector3D>
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#include <QMatrix4x4>
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#include <algorithm>
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namespace lay
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{
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/**
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* @brief Computes the cutpoint between a line and a plane
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*
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* The line is given by a point and a direction (line, line_dir).
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* The plane is given by a point and a normal vector (plane, plane_normal)
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* The "first" component of the returned pair is false if not hit is present.
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*/
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LAY_PLUGIN_PUBLIC std::pair<bool, QVector3D>
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cutpoint_line_with_plane (const QVector3D &line, const QVector3D &line_dir, const QVector3D &plane, const QVector3D &plane_normal);
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/**
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* @brief Computes the cutpoint between a line and a face
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*
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* The line is given by a point and a direction (line, line_dir).
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* The face is given by a plane point and two vectors spanning the face.
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* The "first" component of the returned pair is false if not hit is present.
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*/
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LAY_PLUGIN_PUBLIC std::pair<bool, QVector3D>
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cutpoint_line_with_face (const QVector3D &line, const QVector3D &dir, const QVector3D &plane, const QVector3D &u, const QVector3D &v);
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/**
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* @brief Determines a good hit point of a view line and a cuboid
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*
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* "corner, dim" are the coordinates for the cuboid (corner is the bottom, left, foremost corner, dim
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* is (width, height, depth)
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* "line, line_dir" is the view line where "line_dir" is pointing from the camera to the object.
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* The returned point is a suitable hit point.
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* The "first" component of the returned pair is false if no hit is present.
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*/
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LAY_PLUGIN_PUBLIC std::pair<bool, QVector3D>
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hit_point_with_cuboid (const QVector3D &line, const QVector3D &line_dir, const QVector3D &corner, const QVector3D &dim);
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/**
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* @brief For a given pixel coordinate and camera transformation matrix compute a line containing all points corresponding to this pixel
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*
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* The returned pair contains a point and a direction vector describing the line.
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*/
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LAY_PLUGIN_PUBLIC std::pair<QVector3D, QVector3D>
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camera_normal (const QMatrix4x4 &camera_trans, double x, double y);
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/**
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* @brief Normalizes a scene transformation
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*
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* Scene transformations consist of a scaling and displacement. Both are
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* interchangeable to some extent under the presence of a perspective
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* transformation (further away makes the scene smaller). This normalization
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* tries to find a displacement which has "ztarget" target value for z. Without normalization
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* the scene tends to "move away" with respect to z.
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*/
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LAY_PLUGIN_PUBLIC void
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normalize_scene_trans (const QMatrix4x4 &cam_trans, QVector3D &displacement, double &scale, double ztarget = 0.0);
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}
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#endif
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