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base: noteuclid:d2c512641a91959400db7568389362933a9e318d
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noteuclid:master
noteuclid:metal
noteuclid:color
noteuclid:vertex-light
noteuclid:two-way
noteuclid:qt-ui
..
compare: noteuclid:6ba9add6eae6c26a2a24997b1e07a1060f7c05e0
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noteuclid:metal
noteuclid:color
noteuclid:vertex-light
noteuclid:two-way
noteuclid:qt-ui
noteuclid:master

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5 changed files with 105 additions and 479 deletions
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80
src/lib.rs
View File

@ -9,7 +9,7 @@ use crate::{
camera::OrbitalCamera, camera::OrbitalCamera,
ray::Ray, ray::Ray,
render::lines::{LookParams, Mesh, Pipeline, Vertex}, render::lines::{LookParams, Mesh, Pipeline, Vertex},
trace::{Hit, Lambertian, Reflector, Scene, Source, Sphere}, trace::{Hit, Scene, Source, Sphere},
}; };
mod camera; mod camera;
@ -36,14 +36,6 @@ pub struct RedrawArgs {
pub light_spread: f32, pub light_spread: f32,
pub accum_sigma: f32, pub accum_sigma: f32,
pub accum_scale: f32, pub accum_scale: f32,
pub reflections: u32,
pub show_axes: bool,
pub show_shapes: bool,
pub show_hit_emission: bool,
pub show_miss_emission: bool,
pub show_direct_hit: bool,
pub show_indirect_hit: bool,
pub show_light: bool,
} }
pub struct Gpu { pub struct Gpu {
@ -171,9 +163,7 @@ impl Core {
depth_stencil_attachment: None, depth_stencil_attachment: None,
..Default::default() ..Default::default()
}); });
if args.show_axes {
self.pipeline.render(&mut pass, [&self.tripod]); self.pipeline.render(&mut pass, [&self.tripod]);
}
let source = Source { let source = Source {
position_yaw: args.light_position.yaw, position_yaw: args.light_position.yaw,
@ -183,7 +173,6 @@ impl Core {
spread: args.light_spread, spread: args.light_spread,
}; };
if args.show_shapes {
let contour: Vec<Vertex> = loop_list(source.contour(17)) let contour: Vec<Vertex> = loop_list(source.contour(17))
.map(|pos| Vertex { .map(|pos| Vertex {
pos, pos,
@ -192,7 +181,6 @@ impl Core {
.collect(); .collect();
self.pipeline self.pipeline
.render(&mut pass, [&Mesh::new(&self.device, &contour)]); .render(&mut pass, [&Mesh::new(&self.device, &contour)]);
}
const BASE_R: f32 = 2.; const BASE_R: f32 = 2.;
const BASE_POS: Vec3 = vec3(0., 0., -BASE_R); const BASE_POS: Vec3 = vec3(0., 0., -BASE_R);
@ -223,7 +211,6 @@ impl Core {
for ray in source_rays { for ray in source_rays {
if let Some(hit) = scene.trace_ray(ray) { if let Some(hit) = scene.trace_ray(ray) {
hits.push(hit); hits.push(hit);
if args.show_hit_emission {
source_ray_display.extend([ source_ray_display.extend([
Vertex { Vertex {
pos: ray.base, pos: ray.base,
@ -233,10 +220,6 @@ impl Core {
pos: ray.base + 0.1 * ray.dir, pos: ray.base + 0.1 * ray.dir,
color: vec3(0., 1., 0.), color: vec3(0., 1., 0.),
}, },
]);
}
if args.show_direct_hit {
source_ray_display.extend([
Vertex { Vertex {
pos: hit.incident.base - 0.02 * hit.incident.dir, pos: hit.incident.base - 0.02 * hit.incident.dir,
color: vec3(0., 0., 1.), color: vec3(0., 0., 1.),
@ -246,9 +229,7 @@ impl Core {
color: vec3(1., 1., 1.), color: vec3(1., 1., 1.),
}, },
]); ]);
}
} else { } else {
if args.show_miss_emission {
source_ray_display.extend([ source_ray_display.extend([
Vertex { Vertex {
pos: ray.base, pos: ray.base,
@ -261,64 +242,28 @@ impl Core {
]); ]);
} }
} }
}
if args.reflections > 0 {
let mut hits1 = hits.clone();
for _ in 0..args.reflections {
let mut hits2: Vec<Hit> = Vec::with_capacity(hits1.len());
for hit in &hits1 {
let reflector = Lambertian;
let reflected = reflector.reflect(&mut prng, hit.normal, hit.incident.dir);
let ray = Ray::new(hit.incident.base, reflected);
let Some(hit2) = scene.trace_ray(ray) else {
continue;
};
hits2.push(hit2);
if args.show_indirect_hit {
source_ray_display.extend([
Vertex {
pos: hit2.incident.base - 0.02 * hit2.incident.dir,
color: vec3(1., 0., 1.),
},
Vertex {
pos: hit2.incident.base,
color: vec3(1., 1., 1.),
},
]);
}
}
hits.extend(&hits2);
hits1 = hits2;
}
}
let mut camera_ray_display: Vec<Vertex> = Vec::with_capacity(camera_rays.len()); let mut camera_ray_display: Vec<Vertex> = Vec::with_capacity(camera_rays.len());
if args.show_light {
let sigma2 = args.accum_sigma.powi(2); let sigma2 = args.accum_sigma.powi(2);
let accum_normalizator = (2. * PI * sigma2).sqrt().recip(); let weight = (2. * PI * sigma2).sqrt().recip() * args.accum_scale;
for ray in camera_rays { for ray in camera_rays {
let Some(hit) = scene.trace_ray(ray) else { let Some(hit) = scene.trace_ray(ray) else {
continue; continue;
}; };
let mut total_cd = 0.0f32; let mut value = 0.0f32;
for light_hit in &hits { for light_hit in &hits {
let d2 = hit.incident.base.distance_squared(light_hit.incident.base); let d2 = hit.incident.base.distance_squared(light_hit.incident.base);
if d2 > 9. * sigma2 { if d2 > 3. * sigma2 {
continue; continue;
} }
assert!(hit.normal.is_normalized());
assert!(hit.incident.dir.is_normalized()); assert!(hit.incident.dir.is_normalized());
let reflector = Lambertian; let radiance = hit.normal.dot(-hit.incident.dir);
let in_lm = 1.0; let w = (-0.5 * d2 / sigma2).exp();
let out_cd = in_lm value += w * radiance;
* hit.normal.dot(-hit.incident.dir)
* reflector.brdf(hit.normal, hit.incident.dir, -ray.dir);
let weight = accum_normalizator * (-0.5 * d2 / sigma2).exp();
total_cd += weight * out_cd;
} }
let brightness = 3. * (1. - (1. + total_cd * args.accum_scale).recip()); value *= weight;
value = 3. * (1. - (1. + value).recip());
let r = args.accum_sigma; let r = args.accum_sigma;
let color = vec3(brightness, brightness - 1., brightness - 2.) let color = vec3(value, value - 1., value - 2.).clamp(Vec3::splat(0.), Vec3::splat(1.));
.clamp(Vec3::splat(0.), Vec3::splat(1.));
let vertex = |off: Vec3| Vertex { let vertex = |off: Vec3| Vertex {
pos: hit.incident.base + r * off, pos: hit.incident.base + r * off,
color, color,
@ -332,15 +277,10 @@ impl Core {
vertex(Vec3::Z), vertex(Vec3::Z),
]); ]);
} }
}
if !source_ray_display.is_empty() {
self.pipeline self.pipeline
.render(&mut pass, [&Mesh::new(&self.device, &source_ray_display)]); .render(&mut pass, [&Mesh::new(&self.device, &source_ray_display)]);
}
if !camera_ray_display.is_empty() {
self.pipeline self.pipeline
.render(&mut pass, [&Mesh::new(&self.device, &camera_ray_display)]); .render(&mut pass, [&Mesh::new(&self.device, &camera_ray_display)]);
}
drop(pass); drop(pass);
self.queue.submit(std::iter::once(encoder.finish())); self.queue.submit(std::iter::once(encoder.finish()));

28
src/trace.rs
View File

@ -1,7 +1,7 @@
use std::f32::consts::PI; use std::f32::consts::PI;
use glam::{Mat4, Vec2, Vec3, vec3}; use glam::{Mat4, Vec2, Vec3, vec3};
use rand_distr::{Distribution, UnitSphere}; use rand_distr::Distribution;
use crate::{camera::OrbitalCamera, ray::Ray}; use crate::{camera::OrbitalCamera, ray::Ray};
@ -120,12 +120,10 @@ pub struct Hit {
impl Scene { impl Scene {
pub fn trace_ray(&self, ray: Ray) -> Option<Hit> { pub fn trace_ray(&self, ray: Ray) -> Option<Hit> {
const EPS: f32 = -1e-3;
let hit = self let hit = self
.objects .objects
.iter() .iter()
.filter_map(|obj| obj.trace_ray(ray)) .filter_map(|obj| obj.trace_ray(ray))
.filter(|h| h.dist >= EPS)
.min_by(|a, b| f32::total_cmp(&a.dist, &b.dist))?; .min_by(|a, b| f32::total_cmp(&a.dist, &b.dist))?;
Some(Hit { Some(Hit {
incident: Ray { incident: Ray {
@ -136,27 +134,3 @@ impl Scene {
}) })
} }
} }
pub trait Reflector {
fn brdf(&self, normal: Vec3, incident: Vec3, reflected: Vec3) -> f32 /* 1/sr */;
fn reflect(&self, rgen: &mut impl rand::Rng, normal: Vec3, incident: Vec3) -> Vec3;
}
pub struct Lambertian;
impl Reflector for Lambertian {
fn brdf(&self, _normal: Vec3, _incident: Vec3, _reflected: Vec3) -> f32 {
1. / PI
}
fn reflect(&self, rgen: &mut impl rand::Rng, normal: Vec3, _incident: Vec3) -> Vec3 {
let sphere: Vec3 = UnitSphere.sample(rgen).into();
let sphere_n = normal.dot(sphere); // uniform on [-1, 1]!
let sphere_t = sphere - sphere_n * normal;
let out_n_len2 = sphere_n.abs();
let out_t = (1. + out_n_len2).recip().sqrt() * sphere_t;
let out_n = out_n_len2.sqrt() * normal;
out_t + out_n
}
}

22
ui/src/api.hxx
View File

@ -8,26 +8,18 @@ namespace ffi {
struct Core; struct Core;
struct SphericalPosition { struct SphericalPosition {
float yaw = 0.; float yaw;
float pitch = 0.; float pitch;
float distance = 1.; float distance;
}; };
struct RedrawArgs { struct RedrawArgs {
SphericalPosition camera_position; SphericalPosition camera_position;
SphericalPosition light_position; SphericalPosition light_position;
float light_radius = 1.; float light_radius;
float light_spread = 0.; float light_spread;
float accum_sigma = 1.; float accum_sigma;
float accum_scale = 1.; float accum_scale;
std::uint32_t reflections = 0;
bool show_axes = true;
bool show_shapes = true;
bool show_hit_emission = true;
bool show_miss_emission = true;
bool show_direct_hit = true;
bool show_indirect_hit = true;
bool show_light = true;
}; };
} // namespace ffi } // namespace ffi

18
ui/src/main_window.cxx
View File

@ -20,34 +20,24 @@ void PhotonLight::updateView() {
.camera_position = SphericalPosition{ .camera_position = SphericalPosition{
.yaw = deg_to_rad(m_ui->cameraYaw->value()), .yaw = deg_to_rad(m_ui->cameraYaw->value()),
.pitch = deg_to_rad(m_ui->cameraPitch->value()), .pitch = deg_to_rad(m_ui->cameraPitch->value()),
.distance = m_ui->cameraDistance->value() / 10.0f, .distance = 3.0,
}, },
.light_position = SphericalPosition{ .light_position = SphericalPosition{
.yaw = deg_to_rad(m_ui->lightYaw->value()), .yaw = deg_to_rad(m_ui->lightYaw->value()),
.pitch = deg_to_rad(m_ui->lightPitch->value()), .pitch = deg_to_rad(m_ui->lightPitch->value()),
.distance = m_ui->lightDistance->value() / 10.0f, .distance = 1.0,
}, },
.light_radius = 0.125, .light_radius = 0.125,
.light_spread = 0.125, .light_spread = 0.125,
.accum_sigma = exp10f(m_ui->accumSigma->value() / 25.0), .accum_sigma = exp10f(m_ui->accumSigma->value() / 25.0),
.accum_scale = exp10f(m_ui->accumScale->value() / 25.0), .accum_scale = exp10f(m_ui->accumScale->value() / 25.0),
.reflections = std::uint32_t(m_ui->reflections->value()),
.show_axes = m_ui->displayAxes->isChecked(),
.show_shapes = m_ui->displayShapes->isChecked(),
.show_hit_emission = m_ui->displayEmitted->isChecked(),
.show_miss_emission = m_ui->displayEmitted->isChecked(),
.show_direct_hit = m_ui->displayDirectHits->isChecked(),
.show_indirect_hit = m_ui->displayIndirectHits->isChecked(),
.show_light = m_ui->displayResult->isChecked(),
}; };
m_ui->cameraYawLabel->setText(tr("Yaw: %1 deg").arg(QString::number(qRadiansToDegrees(args.camera_position.yaw)))); m_ui->cameraYawLabel->setText(tr("Yaw: %1 deg").arg(QString::number(qRadiansToDegrees(args.camera_position.yaw))));
m_ui->cameraPitchLabel->setText(tr("Pitch: %1 deg").arg(QString::number(qRadiansToDegrees(args.camera_position.pitch)))); m_ui->cameraPitchLabel->setText(tr("Pitch: %1 deg").arg(QString::number(qRadiansToDegrees(args.camera_position.pitch))));
m_ui->cameraDistanceLabel->setText(tr("Distance: %1").arg(QString::number(args.camera_position.distance)));
m_ui->lightYawLabel->setText(tr("Yaw: %1 deg").arg(QString::number(qRadiansToDegrees(args.light_position.yaw)))); m_ui->lightYawLabel->setText(tr("Yaw: %1 deg").arg(QString::number(qRadiansToDegrees(args.light_position.yaw))));
m_ui->lightPitchLabel->setText(tr("Pitch: %1 deg").arg(QString::number(qRadiansToDegrees(args.light_position.pitch)))); m_ui->lightPitchLabel->setText(tr("Pitch: %1 deg").arg(QString::number(qRadiansToDegrees(args.light_position.pitch))));
m_ui->lightDistanceLabel->setText(tr("Distance: %1").arg(QString::number(args.light_position.distance))); m_ui->accumSigmaLabel->setText(tr("Sigma: %1").arg(QString::number(args.accum_sigma, 'f', 3)));
m_ui->accumSigmaLabel->setText(tr("Averaging radius: %1").arg(QString::number(args.accum_sigma, 'f', 3))); m_ui->accumScaleLabel->setText(tr("Scale: %1").arg(QString::number(args.accum_scale, 'f', 3)));
m_ui->accumScaleLabel->setText(tr("Brightness: %1").arg(QString::number(args.accum_scale, 'f', 3)));
m_ui->viewport->setView(args); m_ui->viewport->setView(args);
} }

306
ui/src/main_window.ui
View File

@ -6,8 +6,8 @@
<rect> <rect>
<x>0</x> <x>0</x>
<y>0</y> <y>0</y>
<width>1600</width> <width>800</width>
<height>1200</height> <height>600</height>
</rect> </rect>
</property> </property>
<property name="windowTitle"> <property name="windowTitle">
@ -25,7 +25,7 @@
<rect> <rect>
<x>0</x> <x>0</x>
<y>0</y> <y>0</y>
<width>1600</width> <width>800</width>
<height>38</height> <height>38</height>
</rect> </rect>
</property> </property>
@ -98,26 +98,6 @@
</property> </property>
</widget> </widget>
</item> </item>
<item>
<widget class="QLabel" name="cameraDistanceLabel">
<property name="text">
<string>Distance</string>
</property>
</widget>
</item>
<item>
<widget class="QSlider" name="cameraDistance">
<property name="maximum">
<number>50</number>
</property>
<property name="value">
<number>30</number>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
</layout> </layout>
</widget> </widget>
</item> </item>
@ -179,39 +159,19 @@
</property> </property>
</widget> </widget>
</item> </item>
<item>
<widget class="QLabel" name="lightDistanceLabel">
<property name="text">
<string>Distance</string>
</property>
</widget>
</item>
<item>
<widget class="QSlider" name="lightDistance">
<property name="maximum">
<number>50</number>
</property>
<property name="value">
<number>10</number>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
</item>
</layout> </layout>
</widget> </widget>
</item> </item>
<item> <item>
<widget class="QGroupBox" name="groupBox_3"> <widget class="QGroupBox" name="groupBox_3">
<property name="title"> <property name="title">
<string>Lighting</string> <string>Accumulating</string>
</property> </property>
<layout class="QVBoxLayout" name="verticalLayout_4"> <layout class="QVBoxLayout" name="verticalLayout_4">
<item> <item>
<widget class="QLabel" name="accumSigmaLabel"> <widget class="QLabel" name="accumSigmaLabel">
<property name="text"> <property name="text">
<string>Averaging radius</string> <string>Sigma</string>
</property> </property>
</widget> </widget>
</item> </item>
@ -234,7 +194,7 @@
<item> <item>
<widget class="QLabel" name="accumScaleLabel"> <widget class="QLabel" name="accumScaleLabel">
<property name="text"> <property name="text">
<string>Brightness</string> <string>Scale</string>
</property> </property>
</widget> </widget>
</item> </item>
@ -254,92 +214,6 @@
</property> </property>
</widget> </widget>
</item> </item>
<item>
<widget class="QLabel" name="label">
<property name="text">
<string>Reflections</string>
</property>
</widget>
</item>
<item>
<widget class="QSpinBox" name="reflections">
<property name="maximum">
<number>20</number>
</property>
<property name="value">
<number>2</number>
</property>
</widget>
</item>
</layout>
</widget>
</item>
<item>
<widget class="QGroupBox" name="groupBox_4">
<property name="title">
<string>Show</string>
</property>
<layout class="QVBoxLayout" name="verticalLayout_5">
<item>
<widget class="QCheckBox" name="displayAxes">
<property name="text">
<string>Axes</string>
</property>
<property name="checked">
<bool>true</bool>
</property>
</widget>
</item>
<item>
<widget class="QCheckBox" name="displayShapes">
<property name="text">
<string>Shapes</string>
</property>
<property name="checked">
<bool>true</bool>
</property>
</widget>
</item>
<item>
<widget class="QCheckBox" name="displayEmitted">
<property name="text">
<string>Emitted rays</string>
</property>
<property name="checked">
<bool>false</bool>
</property>
</widget>
</item>
<item>
<widget class="QCheckBox" name="displayDirectHits">
<property name="text">
<string>Direct incident rays</string>
</property>
<property name="checked">
<bool>false</bool>
</property>
</widget>
</item>
<item>
<widget class="QCheckBox" name="displayIndirectHits">
<property name="text">
<string>Indirect incident rays</string>
</property>
<property name="checked">
<bool>false</bool>
</property>
</widget>
</item>
<item>
<widget class="QCheckBox" name="displayResult">
<property name="text">
<string>Average light</string>
</property>
<property name="checked">
<bool>true</bool>
</property>
</widget>
</item>
</layout> </layout>
</widget> </widget>
</item> </item>
@ -377,8 +251,8 @@
<slot>updateView()</slot> <slot>updateView()</slot>
<hints> <hints>
<hint type="sourcelabel"> <hint type="sourcelabel">
<x>1585</x> <x>688</x>
<y>169</y> <y>159</y>
</hint> </hint>
<hint type="destinationlabel"> <hint type="destinationlabel">
<x>403</x> <x>403</x>
@ -393,8 +267,8 @@
<slot>updateView()</slot> <slot>updateView()</slot>
<hints> <hints>
<hint type="sourcelabel"> <hint type="sourcelabel">
<x>1585</x> <x>688</x>
<y>225</y> <y>215</y>
</hint> </hint>
<hint type="destinationlabel"> <hint type="destinationlabel">
<x>403</x> <x>403</x>
@ -409,8 +283,8 @@
<slot>updateView()</slot> <slot>updateView()</slot>
<hints> <hints>
<hint type="sourcelabel"> <hint type="sourcelabel">
<x>1585</x> <x>688</x>
<y>385</y> <y>319</y>
</hint> </hint>
<hint type="destinationlabel"> <hint type="destinationlabel">
<x>403</x> <x>403</x>
@ -425,8 +299,8 @@
<slot>updateView()</slot> <slot>updateView()</slot>
<hints> <hints>
<hint type="sourcelabel"> <hint type="sourcelabel">
<x>1585</x> <x>688</x>
<y>441</y> <y>375</y>
</hint> </hint>
<hint type="destinationlabel"> <hint type="destinationlabel">
<x>403</x> <x>403</x>
@ -441,8 +315,8 @@
<slot>updateView()</slot> <slot>updateView()</slot>
<hints> <hints>
<hint type="sourcelabel"> <hint type="sourcelabel">
<x>1585</x> <x>729</x>
<y>601</y> <y>479</y>
</hint> </hint>
<hint type="destinationlabel"> <hint type="destinationlabel">
<x>399</x> <x>399</x>
@ -457,8 +331,8 @@
<slot>updateView()</slot> <slot>updateView()</slot>
<hints> <hints>
<hint type="sourcelabel"> <hint type="sourcelabel">
<x>1585</x> <x>729</x>
<y>657</y> <y>535</y>
</hint> </hint>
<hint type="destinationlabel"> <hint type="destinationlabel">
<x>399</x> <x>399</x>
@ -466,150 +340,6 @@
</hint> </hint>
</hints> </hints>
</connection> </connection>
<connection>
<sender>cameraDistance</sender>
<signal>valueChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>271</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>lightDistance</sender>
<signal>valueChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>487</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>displayAxes</sender>
<signal>stateChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>799</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>displayDirectHits</sender>
<signal>stateChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>901</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>displayEmitted</sender>
<signal>stateChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>867</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>displayIndirectHits</sender>
<signal>stateChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>935</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>displayResult</sender>
<signal>stateChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>969</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>displayShapes</sender>
<signal>stateChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>833</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
<connection>
<sender>reflections</sender>
<signal>valueChanged(int)</signal>
<receiver>MainWindow</receiver>
<slot>updateView()</slot>
<hints>
<hint type="sourcelabel">
<x>1489</x>
<y>712</y>
</hint>
<hint type="destinationlabel">
<x>799</x>
<y>599</y>
</hint>
</hints>
</connection>
</connections> </connections>
<slots> <slots>
<slot>updateView()</slot> <slot>updateView()</slot>