-
Notifications
You must be signed in to change notification settings - Fork 0
/
body.cpp
281 lines (248 loc) · 10.6 KB
/
body.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
#include "body.h"
#include "path.h"
#include <cmath>
#include <QSettings>
#include <QStringList>
#include <QImage>
#include <QtMath>
int Body::ObjectID(0);
bool Body::ShowAxis(false);
bool Body::ShowOrbit(true);
float Body::PointSizeThreshold(10.0);
Body::Body(const QString &name, QObject *parent)
: QObject(parent)
, m_name(name)
, m_objectId(++ObjectID)
, m_radius(0.0)
, m_boundingRadius(0.0)
, m_sphere(0)
, m_ring(0)
, m_orbit(0)
, m_axis(0)
, m_pointObject(0)
, m_onScreenRadius(0)
, m_onScreenDistanceToParent(-1)
, m_text(0)
, m_flare(0)
, m_root(0)
, m_texture(0)
, m_nightTexture(0)
, m_ringTexture(0)
{
float unitcoeff = 1.0;
initializeOpenGLFunctions();
m_root = dynamic_cast<Body*>(parent);
QSettings data(resPath()+"data/data.txt", QSettings::IniFormat);
data.beginGroup(name);
m_texture = loadTexture(resPath()+data.value("texture").toString());
if (data.contains("nightTexture"))
m_nightTexture = loadTexture(resPath()+data.value("nightTexture").toString());
float radius = data.value("radius").toFloat()*unitcoeff;
m_isLightSource = data.contains("lightsource") ? data.value("lightsource").toBool() : false;
if (m_isLightSource) {
m_flare = new Flare(this);
}
float flattening = data.contains("flattening") ? data.value("flattening").toFloat() : 0.0;
m_sphere = new Sphere(radius, flattening, this);
if (data.contains("shader")) {
m_sphere->setCustomShader(data.value("shader").toString());
}
m_sphere->setColor(m_isLightSource ? QVector3D(1.0, 1.0, 1.0) : QVector3D(0.0, 0.0, 0.0));
m_radius = radius;
m_boundingRadius = m_radius;
if (data.contains("ringTexture")) {
m_ringTexture = loadTexture(resPath()+data.value("ringTexture").toString());
float innerRadius = data.value("innerRadius").toFloat()*unitcoeff;
float outerRadius = data.value("outerRadius").toFloat()*unitcoeff;
m_ring = new Ring(innerRadius, outerRadius, this);
m_boundingRadius = outerRadius;
}
QVector3D color = QVector3D(0.5, 0.5, 0.5);
if (data.contains("color")) {
QList<QVariant> vec = data.value("color").toList();
if (vec.size()!=3)
qWarning()<<vec<<"color size is not 3";
color = QVector3D(vec.at(0).toFloat(), vec.at(1).toFloat(), vec.at(2).toFloat());
}
m_pointObject = new PointObject(color, this);
m_pointObject->setColor(m_objectId);
if (m_root) {
OrbitalElements elements;
elements.eccentricity = data.value("eccentricity").toDouble();
elements.semiMajorAxis = data.value("semimajoraxis").toDouble()*unitcoeff;
elements.inclination = qDegreesToRadians(data.value("inclination").toDouble());
elements.longitudeOfAscendingNode = qDegreesToRadians(data.value("ascendingnode").toDouble());
elements.argumentOfPeriapsis = qDegreesToRadians(data.value("argumentperiapsis").toDouble());
elements.meanAnomalyAtEpoch = qDegreesToRadians(data.value("meanAnomaly").toDouble());
elements.revolutionPeriod = data.value("siderealrev").toDouble()*86400.0;
m_orbit = new Orbit(elements, color, this);
}
m_rotation.period = data.value("siderealrot").toDouble()*86400.0;
m_rotation.axialTilt = qDegreesToRadians(data.value("axialtilt").toDouble());
m_text = new TextBillboard(m_name, color, this);
m_text->setColor(m_objectId);
m_axis = new Axis(2.0*radius, this);
QStringList satellites = data.value("satellites").toString().split(":");
data.endGroup();
foreach (const QString &satellite, satellites) {
if (!satellite.isEmpty()) {
m_satellites.append(new Body(satellite, this));
}
}
}
Body::~Body()
{
glDeleteTextures(1, &m_texture);
glDeleteTextures(1, &m_ringTexture);
glDeleteTextures(1, &m_nightTexture);
}
void Body::setTime(double time)
{
double longitudeOfPeriapsis = 0;
double rot0 = 0;
if (m_orbit) {
// Orbital orientation
m_referenceFrame = m_referenceFrame*m_orbit->orientation();
m_orbitFrame = m_referenceFrame;
// Orbital position
Eigen::Vector2d position = m_orbit->position(time);
m_orbit->setBodyPosition(position, time);
m_referenceFrame.translate(Eigen::Vector3d(position.x(), position.y(), 0.0));
longitudeOfPeriapsis = m_orbit->elements().argumentOfPeriapsis
+ m_orbit->elements().longitudeOfAscendingNode;
rot0 = m_orbit->elements().meanAnomalyAtEpoch;// FIXME: only works for moon and earth by definition
}
m_referenceFrame.rotate(Eigen::AngleAxisd(M_PI/2.0-longitudeOfPeriapsis, Eigen::Vector3d::UnitZ()));
m_referenceFrame.rotate(Eigen::AngleAxisd(m_rotation.axialTilt, Eigen::Vector3d::UnitY()));
// Draw all satellites in the equatorial plane for the sake of simplicity.
// TODO: In reality they should be in the Laplace plane, which can be closer to the body's orbital plane.
m_laplaceFrame = m_referenceFrame;
m_referenceFrame.rotate(Eigen::AngleAxisd(-M_PI/2.0+longitudeOfPeriapsis, Eigen::Vector3d::UnitZ()));
m_referenceFrame.rotate(Eigen::AngleAxisd(rot0 + fmod(2.0*M_PI/m_rotation.period*time, 2.0*M_PI), Eigen::Vector3d::UnitZ()));
foreach (Body* satellite, m_satellites) {
satellite->setReferenceFrame(m_laplaceFrame);
satellite->setTime(time);
}
}
void Body::render(const Eigen::Affine3d &view, const Eigen::Affine3d &projection, RenderMode::Mode mode)
{
if ( (m_onScreenDistanceToParent >= 0)
&&(m_onScreenDistanceToParent < PointSizeThreshold*2) ) {
return;
}
if ( mode == RenderMode::Opaque ) {
if ( ShowAxis ) {
m_axis->render(m_laplaceFrame, view, projection);
}
if (m_onScreenRadius > PointSizeThreshold) {
if (m_nightTexture) {
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_nightTexture);
glActiveTexture(GL_TEXTURE0);
}
glBindTexture(GL_TEXTURE_2D, m_texture);
m_sphere->render(m_referenceFrame, view, projection);
}
return;
}
if ( mode == RenderMode::Translucent ) {
if (m_onScreenRadius > PointSizeThreshold) {
if ( ShowOrbit && m_orbit ) {
m_orbit->render(m_orbitFrame, view, projection);
}
if (m_ring) {
glBindTexture(GL_TEXTURE_2D, m_ringTexture);
m_ring->render(m_referenceFrame, view, projection);
}
} else {
float alpha = ((float)m_onScreenDistanceToParent / (PointSizeThreshold*2.0)) - 1.0;
if ( (alpha > 1.0) || (m_onScreenDistanceToParent < 0) ) alpha = 1.0;
m_pointObject->setAlpha(alpha);
m_pointObject->render(m_referenceFrame, view, projection);
if ( ShowOrbit && m_orbit ) {
m_orbit->setAlpha(alpha);
m_orbit->render(m_orbitFrame, view, projection);
}
m_text->setAlpha(alpha);
m_text->render(m_referenceFrame, view, projection);
}
return;
}
if ( mode == (RenderMode::Picking) ) {
if (m_onScreenRadius > PointSizeThreshold) {
m_sphere->setColor(m_objectId);
m_sphere->renderSolidColor(m_referenceFrame, view, projection);
m_sphere->setColor(m_isLightSource ? QVector3D(1.0, 1.0, 1.0) : QVector3D(0.0, 0.0, 0.0));
} else {
m_pointObject->renderSolidColor(m_referenceFrame, view, projection);
m_text->renderSolidColor(m_referenceFrame, view, projection);
}
return;
}
if ( mode == (RenderMode::LightSource) ) {
if (m_isLightSource) {
glBindTexture(GL_TEXTURE_2D, m_texture);
m_sphere->render(m_referenceFrame, view, projection);
} else {
if (m_onScreenRadius > 0) {
m_sphere->renderSolidColor(m_referenceFrame, view, projection);
}
}
if (m_ring)
m_ring->renderSolidColor(m_referenceFrame, view, projection);
return;
}
}
GLuint Body::loadTexture(const QString &image)
{
QImage img(image);
if (img.isNull()) {
qWarning()<<image<<"Unable to load file, unsupported file format";
return GLuint();
}
QImage glImg = img.mirrored().convertToFormat(QImage::Format_RGBA8888);
GLuint textureId;
glGenTextures(1, &textureId);
glBindTexture(GL_TEXTURE_2D, textureId);
// // OpenGL 4.2
// int num_mipmaps = ceil(log2(qMax(glImg.width(),glImg.height())))+1;
// glTexStorage2D(GL_TEXTURE_2D, num_mipmaps-1, GL_RGBA8, glImg.width(), glImg.height());
// glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, glImg.width(), glImg.height(),
// GL_RGBA, GL_UNSIGNED_BYTE, glImg.bits());
GLint internalFormat = GL_RGBA;
#ifndef Q_OS_ANDROID
if (QOpenGLContext::currentContext()->hasExtension("GL_EXT_texture_compression_s3tc")) {
internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
}
#endif
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, glImg.width(), glImg.height(),
0, GL_RGBA, GL_UNSIGNED_BYTE, glImg.bits());
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
return textureId;
}
//GLuint Body::loadTexture(const QString &image, QOpenGLTexture *texture)
//{
// QImage img(image);
// if (img.isNull()) {
// qWarning("Unable to load file, unsupported file format");
// return GLuint();
// }
// texture = new QOpenGLTexture(img.mirrored());
// texture->setWrapMode(QOpenGLTexture::Repeat);
// texture->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear, QOpenGLTexture::Linear);
//// texture = new QOpenGLTexture(QOpenGLTexture::Target2D);
//// texture->setFormat(QOpenGLTexture::RGBA_DXT5);
//// texture->setSize(img.width(), img.height());
//// texture->setMipLevels(texture->maximumMipLevels());
//// texture->allocateStorage();
//// QImage glImage = img.mirrored().convertToFormat(QImage::Format_RGBA8888);
//// texture->setCompressedData(glImage.byteCount(), glImage.bits());
////// texture->setData(0, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8, glImage.bits());
//// texture->setWrapMode(QOpenGLTexture::Repeat);
//// texture->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear, QOpenGLTexture::Linear);
// return texture->textureId();
//}