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Commit df8c1300 authored by Aldo Gonzalez-Lorenzo's avatar Aldo Gonzalez-Lorenzo
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Add zoom

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README.md
+ 1
− 8
View file @ df8c1300
......@@ -12,16 +12,9 @@ Télécharge ta vidéo depuis la [page web](https://www.irif.fr/~charbit/Comptag
video = p.createVideo('2023-03-07_part58.mp4', () => {
```
Selon la taille de ton écran, tu peux modifier cette partie du code :
```javascript
// set_video_height(600)
set_video_width(1400)
```
## Utilisation
Tu peux controller la vidéo avec les trois boutons ou avec les touches `Left`, `Bottom` et `Right`, respectivement.
Tu peux contrôler la vidéo avec les trois boutons ou avec les touches `Left`, `Bottom` et `Right`, respectivement. Tu peux aussi régler l'offset horizontal et vertical, le zoom et la taille de la vidéo.
Clique sur la tête d'un manifestant quand il traverse la ligne rouge. Un marqueur sera affiché durant une seconde.
......
index.html
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View file @ df8c1300
......@@ -7,7 +7,7 @@
<title>Comptage manifestants</title>
<meta name="author" content="Aldo Gonzalez-Lorenzo">
<style>
#comptage {
#comptage canvas {
cursor: crosshair;
}
.container {
......@@ -19,6 +19,12 @@
p {
margin: 2px;
}
input[type="number"] {
width: 3rem;
}
label {
cursor: help;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/p5@1.1.9/lib/p5.js"></script>
</head>
......@@ -30,18 +36,39 @@
Time: <span id="time"></span>
</p>
<p>
<button id="rewind">Rewind</button>
<button id="rewind" title="Go back 0.5 seconds">Rewind</button>
<button id="pause">Pause</button>
<button id="play">Play</button>
</p>
</div>
<p>
<label title="Value between 0 and 1">
X offset
<input id="zoom_x" type="number" step= "0.01" value="0" min="0" max="1">
</label>
<label title="Value between 0 and 1">
Y offset
<input id="zoom_y" type="number" step= "0.01" value="0" min="0" max="1">
</label>
<label title="Value between 0 and 1">
Zoom
<input id="zoom_k" type="number" step= "0.1" value="1" min="0.1">
</label>
<label title="Value between 0 and 1">
Canvas size
<input id="zoom_cs" type="number" step= "0.1" value=".4" min="0.1">
</label>
<!-- <button id="zoom">Resize</button> -->
</p>
<p>
Manifestants enregistrés : <span id="manifestants">0</span><br>
<textarea rows="2" cols="100"></textarea> <button id="import">Import</button>
<textarea rows="2" cols="100"></textarea> <button id="import">Import</button><br>
<small></small>
</p>
<script>
let mode = 'start'
let people = []
let zoom = {x: 0, y: 0, k: 1}
const comptage = p => {
/* Global variables */
......@@ -54,29 +81,35 @@
video.volume(0)
video.play()
video.pause()
// set_video_height(600)
set_video_width(1700)
p.set_canvas_size()
video.hide() // hides the html video loader
})
}
// Set the height of the video to a confortable size
set_video_height = function (h) {
video.size(h * (video.width / video.height), h)
p.resizeCanvas(video.width, video.height)
p.set_canvas_size = function () {
const size = Number(document.querySelector('input#zoom_cs').value)
p.resizeCanvas(size*video.width, size*video.height)
zoom.k = size
document.querySelector('#zoom_k').value = size
}
// Set the width of the video to a confortable size
set_video_width = function (w) {
video.size(w, w * (video.height / video.width))
p.resizeCanvas(video.width, video.height)
p.set_zoom = function () {
zoom.x = Number(document.querySelector('#zoom_x').value)
zoom.y = Number(document.querySelector('#zoom_y').value)
zoom.k = Number(document.querySelector('#zoom_k').value)
}
p.draw = function () {
p.background(220)
p.background(240)
let img = video.get()
p.image(img, 0, 0) // redraws the video frame by frame
//p.image(img, 0, 0) // redraws the video frame by frame
p.image(
img,
- zoom.x*img.width*zoom.k, - zoom.y*img.height*zoom.k, img.width*zoom.k, img.height*zoom.k,
) // redraws the video frame by frame
draw_people()
document.querySelector('#time').textContent = `${p.nf(video.time(), 0, 2)} / ${video.duration()}`
}
......@@ -87,20 +120,38 @@
p.push()
p.noStroke()
p.fill('rgba(0, 255, 0, 0.5)')
p.circle(person.x * p.width, person.y * p.height, 10)
const coord = coord_to_local(person)
if (p.dist(p.mouseX, p.mouseY, coord.x, coord.y) < 10) {
p.fill('rgba(0, 0, 255, 0.5)')
document.querySelector('small').textContent = "Hovered person: " + JSON.stringify(person)
}
p.circle(coord.x, coord.y, 10)
p.pop()
}
}
}
coord_to_global = function(coord) {
const x = coord.x / (zoom.k*video.width ) + zoom.x
const y = coord.y / (zoom.k*video.height) + zoom.y
return {x: x, y: y}
}
coord_to_local = function(coord) {
const x = (coord.x - zoom.x) * video.width * zoom.k
const y = (coord.y - zoom.y) * video.height * zoom.k
return {x: x, y: y}
}
p.mousePressed = function () {
if (!(0 <= p.mouseX && p.mouseX <= p.width && 0 <= p.mouseY && p.mouseY <= p.height)) {
return
}
const coord = coord_to_global({x: p.mouseX, y: p.mouseY})
const person = {
t: video.time(),
x: p.mouseX / p.width,
y: p.mouseY / p.height
x: coord.x,
y: coord.y
}
people.push(person)
document.querySelector('#manifestants').textContent = people.length
......@@ -118,6 +169,10 @@
}
}
p.mouseOver = function() {
console.log(p.mouseX, p.mouseY)
}
p.forward = function () {
video.play()
}
......@@ -140,6 +195,11 @@
people = JSON.parse(document.querySelector('textarea').value)
document.querySelector('#manifestants').textContent = people.length
})
// document.querySelector('button#zoom').addEventListener('click', compt.set_zoom)
for (const input of document.querySelectorAll('input[type="number"]')) {
input.addEventListener('input', compt.set_zoom)
}
document.querySelector('input#zoom_cs').addEventListener('input', compt.set_canvas_size)
</script>
</body>
......
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