Kstars

pointsourcenode.cpp
1 /*
2  SPDX-FileCopyrightText: 2016 Artem Fedoskin <[email protected]>
3 
4  SPDX-License-Identifier: GPL-2.0-or-later
5 */
6 #include "skyobject.h"
7 #include "Options.h"
8 
9 #include <QSGSimpleTextureNode>
10 
11 #include "pointsourcenode.h"
12 #include "nodes/pointnode.h"
13 
14 #include "../rootnode.h"
15 #include "../labelsitem.h"
16 #include "labelnode.h"
17 
19  char spType, float size, short trixel)
20  : SkyNode(skyObject), m_rootNode(parentNode), m_spType(spType), m_size(size),
21  m_labelType(labelType), m_trixel(trixel)
22 {
23 }
24 
25 float PointSourceNode::starWidth(float mag) const
26 {
27  //adjust maglimit for ZoomLevel
28  const double maxSize = 10.0;
29 
30  double lgmin = log10(MINZOOM);
31  // double lgmax = log10(MAXZOOM);
32  double lgz = log10(Options::zoomFactor());
33 
34  float sizeFactor = maxSize + (lgz - lgmin);
35 
36  float m_sizeMagLim = map()->sizeMagLim();
37 
38  float size = (sizeFactor * (m_sizeMagLim - mag) / m_sizeMagLim) + 1.;
39  if (size <= 1.0)
40  size = 1.0;
41  if (size > maxSize)
42  size = maxSize;
43 
44  return size;
45 }
46 
47 PointSourceNode::~PointSourceNode()
48 {
49  if (m_label &&
50  (m_labelType == LabelsItem::label_t::STAR_LABEL || m_labelType == LabelsItem::label_t::CATALOG_STAR_LABEL))
51  {
52  m_rootNode->labelsItem()->deleteLabel(m_label);
53  }
54 }
55 
57 {
58  if (!m_point)
59  {
60  m_point = new PointNode(m_rootNode, m_spType, starWidth(m_size));
61  addChildNode(m_point);
62  }
63  show();
64  m_point->setSize(starWidth(m_skyObject->mag())); //Set points size base on the magnitude of object
65 }
66 
68 {
69  QSizeF size = m_point->size();
70  QMatrix4x4 m(1, 0, 0, pos.x(), 0, 1, 0, pos.y(), 0, 0, 1, 0, 0, 0, 0, 1);
71  m.translate(-0.5 * size.width(), -0.5 * size.height());
72 
73  setMatrix(m);
75 }
76 
78 {
79  if (!projector()->checkVisibility(m_skyObject))
80  {
81  hide();
82  return;
83  }
84 
85  bool visible = false;
86  pos = projector()->toScreen(m_skyObject, true, &visible);
87  if (visible &&
88  projector()->onScreen(
89  pos)) // FIXME: onScreen here should use canvas size rather than SkyMap size, especially while printing in portrait mode! (Inherited from SkyMap)
90  {
91  updatePos(pos, m_drawLabel);
92  }
93  else
94  {
95  hide();
96  }
97 }
98 
99 void PointSourceNode::updatePos(QPointF pos, bool drawLabel)
100 {
101  updatePoint();
102  changePos(pos);
103 
104  m_drawLabel = drawLabel;
105 
106  if (m_drawLabel && m_labelType != LabelsItem::label_t::NO_LABEL)
107  {
108  if (!m_label) //This way labels will be created only when they are needed
109  {
110  if (m_trixel != -1)
111  {
112  m_label = m_rootNode->labelsItem()->addLabel(m_skyObject, m_labelType, m_trixel);
113  }
114  else
115  {
116  m_label = m_rootNode->labelsItem()->addLabel(m_skyObject, m_labelType);
117  }
118  }
119  m_label->setLabelPos(pos);
120  }
121  else
122  {
123  if (m_label)
124  m_label->hide();
125  }
126 }
127 
129 {
130  if (m_label)
131  m_label->hide();
132  SkyNode::hide();
133 }
SkyOpacityNode derived class that represents stars and planets using cached QSGTexture.
Definition: pointnode.h:24
qreal height() const const
SkyMapLite * map() const
short function to access SkyMapLite
Definition: skynode.h:45
A container for nodes that holds collection of textures for stars and provides clipping.
Definition: rootnode.h:59
float mag() const
Definition: skyobject.h:206
float starWidth(float mag) const
Get the width of a star of magnitude mag.
void setSize(float size)
setSize update size of PointNode with the given parameter
Definition: pointnode.cpp:23
float sizeMagLim() const
Used in PointSourceNode.
Definition: skymaplite.h:341
label_t
The label_t enum.
Definition: labelsitem.h:61
void updatePoint()
updatePoint initializes PointNode if not done that yet.
bool visible()
Definition: skynode.cpp:44
virtual void update() override
update updates coordinates of this node based on the visibility of its SkyObject
void setMatrix(const QMatrix4x4 &matrix)
void deleteLabel(LabelNode *label)
deletes particular label
Definition: labelsitem.cpp:241
void markDirty(QSGNode::DirtyState bits)
void updatePos(QPointF pos, bool drawLabel)
updatePos updates position of this node and its label.
qreal x() const const
qreal y() const const
PointSourceNode(SkyObject *skyObject, RootNode *parentNode, LabelsItem::label_t labelType=LabelsItem::label_t::STAR_LABEL, char spType='A', float size=1, short trixel=-1)
Constructor.
QPointF toScreen(const SkyPoint *o, bool oRefract=true, bool *onVisibleHemisphere=nullptr) const
This is exactly the same as toScreenVec but it returns a QPointF.
Definition: projector.cpp:93
void setLabelPos(QPointF pos)
set the position of label with the given offset from SkyObject's position and makes the label visible...
Definition: labelnode.cpp:123
virtual void show()
shows all child nodes (sets opacity of m_opacity to 1)
Definition: skynode.cpp:27
Provides virtual functions for update of coordinates and nodes hiding.
Definition: skynode.h:27
virtual void changePos(QPointF pos) override
changePos changes the position m_point
void translate(const QVector3D &vector)
virtual void hide() override
hides this node and its label.
Information about an object in the sky.
Definition: skyobject.h:41
LabelNode * addLabel(SkyObject *skyObject, label_t labelType)
Create LabelNode with given skyObject and append it to LabelTypeNode that corresponds to type.
Definition: labelsitem.cpp:111
virtual void hide()
hides all child nodes (sets opacity of m_opacity to 0)
Definition: skynode.cpp:21
qreal width() const const
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