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Commit 2bde7292 authored by Oliver Bock's avatar Oliver Bock
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Use wireframe triangle fans for cones and visualize beam intensity by texture

parent f59e10fc
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src/pulsaranimationwidget.cpp
View file @ 2bde7292
......@@ -57,13 +57,16 @@ PulsarAnimationWidget::PulsarAnimationWidget(QWidget *parent) :
m_quadricCompanion = NULL;
m_quadricPulsarOrbitPlane = NULL;
m_quadricPulsar = NULL;
m_quadricPulsarCone1 = NULL;
m_quadricPulsarCone2 = NULL;
m_quadricPulsarCone1Shell = NULL;
m_quadricPulsarCone2Shell = NULL;
m_quadricPulsarSpinAxis = NULL;
m_quadricPulsarSpinAxisTop1 = NULL;
m_quadricPulsarSpinAxisTop2 = NULL;
m_quadricPulsarMagneticAxis = NULL;
// initialize texture pointers
m_backgroundTexture = 0;
m_beamTexture = 0;
// initial render timing settings
m_framesPerSecond = 25;
......@@ -82,6 +85,11 @@ PulsarAnimationWidget::PulsarAnimationWidget(QWidget *parent) :
m_companionSemiMajorAxis = (m_pulsarMass/m_companionMass) * m_pulsarSemiMajorAxis;
// initial spin frequency of 0.5 Hz
m_pulsarRotationDelta = (360.0 * 0.5) / m_framesPerSecond;
// beam properties (keep this order!)
m_pulsarBeamLength = 3.0f;
setPulsarBeamAngle(30);
// update orbital period (based on settings above)
updateOrbitPeriod();
......@@ -109,12 +117,15 @@ PulsarAnimationWidget::~PulsarAnimationWidget()
if(m_quadricCompanion) gluDeleteQuadric(m_quadricCompanion);
if(m_quadricPulsarOrbitPlane) gluDeleteQuadric(m_quadricPulsarOrbitPlane);
if(m_quadricPulsar) gluDeleteQuadric(m_quadricPulsar);
if(m_quadricPulsarCone1) gluDeleteQuadric(m_quadricPulsarCone1);
if(m_quadricPulsarCone2) gluDeleteQuadric(m_quadricPulsarCone2);
if(m_quadricPulsarCone1Shell) gluDeleteQuadric(m_quadricPulsarCone1Shell);
if(m_quadricPulsarCone2Shell) gluDeleteQuadric(m_quadricPulsarCone2Shell);
if(m_quadricPulsarSpinAxis) gluDeleteQuadric(m_quadricPulsarSpinAxis);
if(m_quadricPulsarSpinAxisTop1) gluDeleteQuadric(m_quadricPulsarSpinAxisTop1);
if(m_quadricPulsarSpinAxisTop2) gluDeleteQuadric(m_quadricPulsarSpinAxisTop2);
if(m_quadricPulsarMagneticAxis) gluDeleteQuadric(m_quadricPulsarMagneticAxis);
if(m_backgroundTexture) deleteTexture(m_backgroundTexture);
if(m_beamTexture) deleteTexture(m_beamTexture);
}
void PulsarAnimationWidget::initializeGL()
......@@ -143,7 +154,6 @@ void PulsarAnimationWidget::initializeGL()
glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
......@@ -152,18 +162,22 @@ void PulsarAnimationWidget::initializeGL()
m_quadricCompanion = gluNewQuadric();
m_quadricPulsarOrbitPlane = gluNewQuadric();
m_quadricPulsar = gluNewQuadric();
m_quadricPulsarCone1 = gluNewQuadric();
m_quadricPulsarCone2 = gluNewQuadric();
m_quadricPulsarCone1Shell = gluNewQuadric();
m_quadricPulsarCone2Shell = gluNewQuadric();
m_quadricPulsarSpinAxis = gluNewQuadric();
m_quadricPulsarSpinAxisTop1 = gluNewQuadric();
m_quadricPulsarSpinAxisTop2 = gluNewQuadric();
m_quadricPulsarMagneticAxis = gluNewQuadric();
gluQuadricNormals(m_quadricCompanionOrbitPlane, GLU_SMOOTH);
gluQuadricNormals(m_quadricCompanion, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarOrbitPlane, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsar, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarCone1, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarCone2, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarCone1Shell, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarCone2Shell, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarSpinAxis, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarSpinAxisTop1, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarSpinAxisTop2, GLU_SMOOTH);
gluQuadricNormals(m_quadricPulsarMagneticAxis, GLU_SMOOTH);
// query max texture size (estimate)
......@@ -193,16 +207,31 @@ void PulsarAnimationWidget::initializeGL()
backgroundTexture = backgroundTexture.scaled(maxTextureSize, maxTextureSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
}
// prepare and check beam texture
QImage beamTexture(":/textures/resources/texture_beam.png");
if(beamTexture.width() != beamTexture.height()) {
qWarning() << msgShape.arg(tr("Beam"));
}
else {
double integer = 0.0;
double fraction = 0.0;
fraction = modf(log(beamTexture.width()) / log(2.0), &integer);
if(fraction > 0.0) {
qWarning() << msgPower.arg(tr("Beam"));
}
}
if(beamTexture.width() > maxTextureSize) {
qWarning() << msgSize.arg(tr("beam").arg(maxTextureSize).arg(maxTextureSize));
beamTexture = beamTexture.scaled(maxTextureSize, maxTextureSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
}
// bind textures
m_backgroundTexture = bindTexture(backgroundTexture, GL_TEXTURE_2D, GL_RGBA);
m_beamTexture = bindTexture(beamTexture, GL_TEXTURE_2D, GL_RGBA);
// use mipmapped textures
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
// enable 2D mapping (s/t coordinates, sphere map won't rotate texture!)
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
}
void PulsarAnimationWidget::resizeGL(int w, int h)
......@@ -220,6 +249,8 @@ void PulsarAnimationWidget::resizeGL(int w, int h)
void PulsarAnimationWidget::paintGL()
{
GLfloat x,y,angle;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
......@@ -272,10 +303,17 @@ void PulsarAnimationWidget::paintGL()
glTranslatef(sin((m_orbitRotationAngle + 180.0) * deg2rad) * m_companionSemiMajorAxis,
0.0,
cos((m_orbitRotationAngle + 180.0) * deg2rad) * m_companionSemiMajorAxis);
// draw, with proper lighting
glEnable(GL_LIGHTING);
gluSphere(m_quadricCompanion, 1.0, 32, 32);
glDisable(GL_LIGHTING);
}
glPopMatrix();
// enable wireframe mode
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
// draw pulsar
glPushMatrix();
{
......@@ -302,20 +340,15 @@ void PulsarAnimationWidget::paintGL()
glPopMatrix();
}
// enable wireframe mode
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
// draw pulsar
// draw sphere, with proper lighting
glEnable(GL_LIGHTING);
glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
gluSphere(m_quadricPulsar, 1.0, 32, 32);
// disable wireframe mode
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glDisable(GL_LIGHTING);
}
glPopMatrix();
// TODO: should be located elsewhere
static GLfloat coneAmbient[] = {1.0, 1.0, 0.0, 1.0};
static GLfloat coneDiffuse[] = {1.0, 1.0, 0.0, 1.0};
static GLfloat coneSpecular[] = {1.0, 1.0, 0.5, 1.0};
// first cone
glPushMatrix();
{
......@@ -327,24 +360,72 @@ void PulsarAnimationWidget::paintGL()
// draw magnetic axis (for both cones)
if(m_showRotationAxes) {
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glColor3f(1.0f, 1.0f, 0.0f);
glPushMatrix();
{
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, translucent);
glTranslatef(0.0, 0.0, -5.0);
gluCylinder(m_quadricPulsarMagneticAxis, 0.05, 0.05, 10.0, 32, 1);
glTranslatef(0.0, 0.0, -4.0);
gluCylinder(m_quadricPulsarMagneticAxis, 0.020, 0.020, 8.0, 32, 1);
}
glPopMatrix();
glPushMatrix();
{
glTranslatef(0.0, 0.0, -4.0);
gluDisk(m_quadricPulsarSpinAxisTop1, 0, 0.020, 32, 8);
}
glPopMatrix();
glPushMatrix();
{
glTranslatef(0.0, 0.0, 4.0);
gluDisk(m_quadricPulsarSpinAxisTop2, 0, 0.020, 32, 8);
}
glPopMatrix();
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
}
glTranslatef(0.0, 0.0, -3.0);
glTranslatef(0.0, 0.0, -m_pulsarBeamLength);
// draw first cone's outer layer
glBegin(GL_TRIANGLE_FAN);
{
// Pinnacle of cone is shared vertex for fan, moved up z-axis
// to produce a cone instead of a circle
glColor4f(1.0f, 1.0f, 0.0f, 0.33f);
glVertex3f(0.0f, 0.0f, m_pulsarBeamLength);
// Loop around in a circle and specify even points along the circle
// as the vertices of the triangle fan (32 sections)
for(angle = 0.0f; angle < (2.0f*PI); angle += (PI/32.0f))
{
// Calculate x and y position of the next vertex
x = m_pulsarBeamOuterRadius * sin(angle);
y = m_pulsarBeamOuterRadius * cos(angle);
// Specify the next vertex for the triangle fan
glVertex2f(x, y);
}
}
glEnd();
// draw first cone's "base" (textured bottom to visualize beam intensity)
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
// create texture coordinates and enable texturing
gluQuadricTexture(m_quadricPulsarCone1Shell, GL_TRUE);
glBindTexture(GL_TEXTURE_2D, m_beamTexture);
glEnable(GL_TEXTURE_2D);
gluDisk(m_quadricPulsarCone1Shell, 0, m_pulsarBeamOuterRadius, 32, 1);
// disable texturing
glDisable(GL_TEXTURE_2D);
glMaterialfv(GL_FRONT, GL_AMBIENT, coneAmbient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, coneDiffuse);
gluCylinder(m_quadricPulsarCone1, 0.475, 0.0, 3.0, 32, 32);
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
}
glPopMatrix();
// second cone
// second cone (pointing towards from camera)
glPushMatrix();
{
glRotatef(-90.0, 1.0, 0.0, 0.0);
......@@ -353,43 +434,55 @@ void PulsarAnimationWidget::paintGL()
glRotatef(m_pulsarRotationAngle - 90.0, 0.0, 0.0, 1.0);
glRotatef(m_pulsarMagneticAxisInclination, 1.0, 0.0, 0.0);
glTranslatef(0.0, 0.0, -3.0);
glTranslatef(0.0, 0.0, -m_pulsarBeamLength);
glMaterialfv(GL_FRONT, GL_AMBIENT, coneAmbient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, coneDiffuse);
gluCylinder(m_quadricPulsarCone2, 0.475, 0.0, 3.0, 32, 32);
}
glPopMatrix();
}
glPopMatrix();
// draw second cone's outer layer
glBegin(GL_TRIANGLE_FAN);
{
// Pinnacle of cone is shared vertex for fan, moved up z-axis
// to produce a cone instead of a circle
glColor4f(1.0f, 1.0f, 0.0f, 0.33f);
glVertex3f(0.0f, 0.0f, m_pulsarBeamLength);
// Loop around in a circle and specify even points along the circle
// as the vertices of the triangle fan (32 sections)
for(angle = 0.0f; angle < (2.0f*PI); angle += (PI/32.0f))
{
// Calculate x and y position of the next vertex
x = m_pulsarBeamOuterRadius * sin(angle);
y = m_pulsarBeamOuterRadius * cos(angle);
// save current state (the following is using parallel projection)
glMatrixMode(GL_PROJECTION);
glPushMatrix();
{
glLoadIdentity();
glOrtho(0, width(), 0, height(), 0.1, 501.0);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
{
glLoadIdentity();
// Specify the next vertex for the triangle fan
glVertex2f(x, y);
}
}
glEnd();
// draw backdrop (independent parallel projection)
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, mat_specular);
glTranslatef(0.0, 0.0, -501.0);
drawTexture(QPointF(0.0, 0.0), m_backgroundTexture);
// draw second cone's "base" (textured bottom to visualize beam intensity)
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
// restore original state
glMatrixMode(GL_PROJECTION);
// create texture coordinates and enable texturing
gluQuadricTexture(m_quadricPulsarCone2Shell, GL_TRUE);
glBindTexture(GL_TEXTURE_2D, m_beamTexture);
glEnable(GL_TEXTURE_2D);
gluDisk(m_quadricPulsarCone2Shell, 0, m_pulsarBeamOuterRadius, 32, 1);
// disable texturing
glDisable(GL_TEXTURE_2D);
}
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
}
glPopMatrix();
// back to solid rendering
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
// draw orbital planes
if(m_cameraInteraction || m_showOrbits) {
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, translucent);
glEnable(GL_LIGHTING);
static double sizeOffset = 0.25;
......@@ -424,6 +517,8 @@ void PulsarAnimationWidget::paintGL()
64, 1);
}
glPopMatrix();
glDisable(GL_LIGHTING);
}
// save current state (the following is using parallel projection)
......@@ -629,6 +724,23 @@ void PulsarAnimationWidget::setPulsarMagneticAxisInclination(const int degrees)
updateGL();
}
void PulsarAnimationWidget::setPulsarBeamAngle(const int degrees)
{
double beamTexturePeakCorrectionFactor = 0.83;
double correctedOuterRadius;
// compute visual radius
m_pulsarBeamOuterRadius = tan(deg2rad * degrees * 0.5f) * m_pulsarBeamLength;
// compute corrected angle for pulse profile
correctedOuterRadius = m_pulsarBeamOuterRadius * beamTexturePeakCorrectionFactor;
m_pulsarBeamAngle = 2 * atan(correctedOuterRadius / m_pulsarBeamLength) * 180.0/PI;
updatePulseProfile();
updateGL();
}
void PulsarAnimationWidget::updateOrbitPeriod()
{
m_orbitalPeriod = 3.1553e7 * sqrt(
......
src/pulsaranimationwidget.h
View file @ 2bde7292
......@@ -46,6 +46,7 @@ public:
void setPulsarSpinAxisInclination(const int degrees);
void setPulsarMagneticAxisInclination(const int degrees);
void setPulsarSemiMajorAxis(const double length);
void setPulsarBeamAngle(const int degrees);
public slots:
void runAnimation();
......@@ -84,12 +85,15 @@ private:
GLUquadricObj *m_quadricCompanion;
GLUquadricObj *m_quadricPulsarOrbitPlane;
GLUquadricObj *m_quadricPulsar;
GLUquadricObj *m_quadricPulsarCone1;
GLUquadricObj *m_quadricPulsarCone2;
GLUquadricObj *m_quadricPulsarCone1Shell;
GLUquadricObj *m_quadricPulsarCone2Shell;
GLUquadricObj *m_quadricPulsarSpinAxis;
GLUquadricObj *m_quadricPulsarSpinAxisTop1;
GLUquadricObj *m_quadricPulsarSpinAxisTop2;
GLUquadricObj *m_quadricPulsarMagneticAxis;
GLuint m_backgroundTexture;
GLuint m_beamTexture;
int m_framesPerSecond;
......@@ -107,6 +111,9 @@ private:
double m_pulsarSpinAxisInclination;
double m_pulsarMagneticAxisInclination;
double m_pulsarBeamLength;
double m_pulsarBeamAngle;
double m_pulsarBeamOuterRadius;
bool m_showOrbits;
bool m_showRotationAxes;
......
src/pulsatingscience.qrc
View file @ 2bde7292
......@@ -14,5 +14,6 @@
</qresource>
<qresource prefix="/textures">
<file>resources/texture_background_carina.png</file>
<file>resources/texture_beam.png</file>
</qresource>
</RCC>
src/resources/texture_beam.svg 0 → 100644
View file @ 2bde7292
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