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submitted 7 hours ago by JRepin@lemmy.ml to c/programming@lemmy.ml

This article compares two tools, Sanitizers and Valgrind, that find memory bugs in programs written in memory-unsafe languages. These two tools work in very different ways. Therefore, while Sanitizers (developed by Google engineers) presents several advantages over Valgrind, each has strengths and weaknesses. Note that the Sanitizers project has a plural name because the suite consists of several tools, which we will explore in this article.

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submitted 3 days ago* (last edited 3 days ago) by dl007@lemmy.ml to c/programming@lemmy.ml
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submitted 4 days ago by yogthos@lemmy.ml to c/programming@lemmy.ml
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submitted 4 days ago by dl007@lemmy.ml to c/programming@lemmy.ml
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submitted 5 days ago by yogthos@lemmy.ml to c/programming@lemmy.ml
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cross-posted from: https://lemm.ee/post/46067136

I'm designing a webapp that is supposed to be an AR environment on your phone, to be viewed with something like Google Cardboard, but I am having an issue that the segmentPointer object that is meant to appear when clicking on an object is not.

I've checked the geometry displays correctly in a sandbox, and when I change it to a 3d object rather than shapeGeometry it does display, but I cannot figure out why it is not displaying how I want it to.

The project is at https://voxelverse.jackgreenearth.org, and the code is quite long, but it is here to read in its totality below as it might need the whole context to discover the error. I've tried myself looking through the code, and I've tried searching the web and asking LLMs, but I couldn't figure it out, so please help me, fellow humans.

Tap for code

"use strict";

import \* as THREE from 'three';

import {GLTFLoader} from 'three/addons/loaders/GLTFLoader.js';

\


const loader = new GLTFLoader();

const textureLoader = new THREE.TextureLoader();

const manager = THREE.DefaultLoadingManager;

\


// Basic functions

\


function ls(id) {

return(localStorage.getItem(id));

};

\


function setLs(id, val) {

localStorage.setItem(id, val);

};

\


function byId(id) {

return(document.getElementById(id));

};

\


function bySel(sel) {

return(document.querySelector(sel));

};

\


function byClass(id) {

return(document.getElementsByClassName(id));

};

\


function toTitleCase(str) {

return str.replace(

/\w\S\*/g,

function(txt) {

return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();

}

);

};

\


function randInt(max) {

return Math.floor(Math.random() \* (max));

};

\


function getRandomFloat(min, max, decimals) {

return(parseFloat((Math.random() \* (max - min) + min).toFixed(decimals)));

};

\


function confine(value, min, max) {

if(value < min) {

return(min);

} else if(value > max) {

return(max);

} else {

return(value);

};

};

\


function wrap(value, min, max) {

const range = max - min;

\


if(value < min) {

return(wrap(value + range, min, max));

} else if(value > max) {

return(wrap(value - range, min, max));

} else {

return(value);

};

};

\


function removeFromArray(array, forDeletion) {

return(array.filter(item => !forDeletion.includes(item)));

};

\


function radToDeg(radians) {

return radians \* (180 / PI);

}

\


function range(start, stop, step = 1) {

if (stop === undefined) {

stop = start;

start = 0

}

return Array.from({ length: (stop - start) / step }, (\_, i) => start + (i \* step));

}

\


function between(variable, min, max, inclusive='min') {

switch(inclusive) {

case 'none':

return((variable > min) && (variable < max));

break;

case 'both':

return((variable >= min) && (variable <= max));

break;

case 'min':

return((variable >= min) && (variable < max));

break;

case 'max':

return((variable > min) && (variable <= max));

break;

}

}

\


function download(data, filename, type) {

var file = new Blob(\[data], {type: type});

if (window\.navigator.msSaveOrOpenBlob) // IE10+

window\.navigator.msSaveOrOpenBlob(file, filename);

else { // Others

var a = document.createElement("a"),

url = URL.createObjectURL(file);

a.href = url;

a.download = filename;

document.body.appendChild(a);

a.click();

setTimeout(function() {

document.body.removeChild(a);

window\.URL.revokeObjectURL(url);

}, 0);

};

};

\


function log(text) {

console.log(text);

};

\


function distance2d(x1, y1, x2, y2) {

return(Math.sqrt(

(Math.abs(x1 - x2) \*\* 2) +

(Math.abs(y1 - y2) \*\* 2)

));

};

\


function distance3d(p1 = new THREE.Vector3(0, 0, 0), p2 = new THREE.Vector3(0, 0, 0)) {

return(Math.sqrt((distance2d(p1.x, p1.y, p2.x, p2.y) \*\* 2) + (Math.abs(p1.z - p2.z) \*\* 2)));

};

\


let totalElementsToLoad = 0;

let numberOfElementsLoaded = 0;

\


function onAllElementsLoaded() {

\


}

\


function load(path, type, functionOnLoad) {

totalElementsToLoad += 1;

\


if(type == 'html') {

fetch(path)

.then(response => response.text())

.then(html => {

let doc = new DOMParser().parseFromString(html, "text/html");

\


functionOnLoad(doc);

\


// If all elements to load have been loaded, execute the relevant function

numberOfElementsLoaded += 1;

if(numberOfElementsLoaded == totalElementsToLoad) {

onAllElementsLoaded();

}

})

.catch(error => {

console.error(error);

});

} else if(type == 'json') {

fetch(path)

.then(response => response.json()) // parse the response as JSON

.then(json => {

functionOnLoad(json);

\


// If all elements to load have been loaded, execute the relevant function

numberOfElementsLoaded += 1;

if(numberOfElementsLoaded == totalElementsToLoad) {

onAllElementsLoaded();

}

})

.catch(error => {

console.error(error);

});

}

}

\


// Setup

\


const PI = 3.1415926535897932384626433832795028841971;

\


// Objects

\


let orientation = {

'absolute': false,

'alpha': 0,

'beta': 0,

'gamma': 0

}

\


// vars

const fps = 60;

\


let keysDown = \[];

let pointerPosition = {'x': 0, 'y': 0, 'positions': \[{'clientX': 0, 'clientY': 0}], 'type': 'mouse'};

\


// Camera

let cameraRotation = new THREE.Euler(0, 0, 0, 'YXZ');

let cameraTargetRotation = {'x': 0, 'y': 0, 'z': 0};

const cameraRotationSensitivity = 0.002;

\


// Other variables

let logicInterval;

\


// Load default settings

let defaultSettings;

\


load("/assets/json/default-settings.json", 'json', function(defset) {

defaultSettings = defset;

\


// Create custom settings

if(!Object.keys(localStorage).includes('settings')) {

setLs('settings', JSON.stringify({}));

};

\


onSettingsLoad();

});

\


function settingURL(url, addValue=true) {

return('children/' + url.split('/').join('/children/') + (addValue ? '/value' : ''));

}

\


function customiseSetting(url, value) {

url = settingURL(url).split('/');

\


let newSettings;

\


function recursiveSet(object, list, index, setTo) {

// If the current component is the last one, assign the value

if(index == list.length - 1) {

object\[list\[index]] = setTo;

return(object);

} else {

// Check if it already contains the value

if(object.hasOwnProperty(list\[index])) {

object\[list\[index]] = recursiveSet(object\[list\[index]], list, index + 1, setTo);

} else {

object\[list\[index]] = recursiveSet({}, list, index + 1, setTo);

}

return(object);

}

};

\


newSettings = recursiveSet(JSON.parse(ls('settings')), url, 0, value);

\


setLs('settings', JSON.stringify(newSettings));

}

\


function getSetting(url, addValue) {

url = settingURL(url, addValue).split('/');

\


function recursiveGet(object, list, index) {

// If the current component is the last one, return the value

if (index == list.length - 1) {

return object\[list\[index]];

} else {

// Check if it contains the value

if (object.hasOwnProperty(list\[index])) {

return recursiveGet(object\[list\[index]], list, index + 1);

} else {

return null; // No such setting

}

}

}

\


// Try to find it in local settings first, otherwise get it from defaultSettings

const localGet = recursiveGet(JSON.parse(ls('settings')), url, 0);

if(localGet == null) {

return(recursiveGet(defaultSettings, url, 0));

} else {

return(localGet);

}

}

\


// First, lets define some functions

// Rendering functions

\


// Thanks, https\://discourse.threejs.org/t/roundedrectangle-squircle/28645!

function roundRectangleGeometry(w, h, r, s) { // width, height, radius corner, smoothness

// helper const's

const wi = w / 2 - r; // inner width

const hi = h / 2 - r; // inner height

const w2 = w / 2; // half width

const h2 = h / 2; // half height

const ul = r / w; // u left

const ur = ( w - r ) / w; // u right

const vl = r / h; // v low

const vh = ( h - r ) / h; // v high

let positions = \[

-wi, -h2, 0, wi, -h2, 0, wi, h2, 0,

-wi, -h2, 0, wi, h2, 0, -wi, h2, 0,

-w2, -hi, 0, -wi, -hi, 0, -wi, hi, 0,

-w2, -hi, 0, -wi, hi, 0, -w2, hi, 0,

wi, -hi, 0, w2, -hi, 0, w2, hi, 0,

wi, -hi, 0, w2, hi, 0, wi, hi, 0

];

let uvs = \[

ul, 0, ur, 0, ur, 1,

ul, 0, ur, 1, ul, 1,

0, vl, ul, vl, ul, vh,

0, vl, ul, vh, 0, vh,

ur, vl, 1, vl, 1, vh,

ur, vl, 1, vh, ur, vh

];

let phia = 0;

let phib, xc, yc, uc, vc, cosa, sina, cosb, sinb;

for (let i = 0; i < s \* 4; i ++) {

phib = Math.PI \* 2 \* ( i + 1 ) / ( 4 \* s );

cosa = Math.cos( phia );

sina = Math.sin( phia );

cosb = Math.cos( phib );

sinb = Math.sin( phib );

xc = i < s || i >= 3 \* s ? wi : - wi;

yc = i < 2 \* s ? hi : -hi;

positions.push( xc, yc, 0, xc + r \* cosa, yc + r \* sina, 0, xc + r \* cosb, yc + r \* sinb, 0 );

uc = i < s || i >= 3 \* s ? ur : ul;

vc = i < 2 \* s ? vh : vl;

uvs.push( uc, vc, uc + ul \* cosa, vc + vl \* sina, uc + ul \* cosb, vc + vl \* sinb );

phia = phib;

}

const geometry = new THREE.BufferGeometry( );

geometry.setAttribute( 'position', new THREE.BufferAttribute( new Float32Array( positions ), 3 ) );

geometry.setAttribute( 'uv', new THREE.BufferAttribute( new Float32Array( uvs ), 2 ) );

return geometry;

}

\


// Render

function render() {

requestAnimationFrame(render);

leftRenderer.render(scene, leftCamera);

rightRenderer.render(scene, rightCamera);

\


framesSoFar++;

};

\


// Functions

function setCameraRotation() {

// Calculate drag

cameraRotation.x = Number((cameraRotation.x + ((cameraTargetRotation.x - cameraRotation.x) / getSetting('Input/Mouse/Camera Rotation Drag'))).toFixed(5));

cameraRotation.y = Number((cameraRotation.y + ((cameraTargetRotation.y - cameraRotation.y) / getSetting('Input/Mouse/Camera Rotation Drag'))).toFixed(5));

cameraRotation.z = Number((cameraRotation.z + ((cameraTargetRotation.z - cameraRotation.z) / getSetting('Input/Mouse/Camera Rotation Drag'))).toFixed(5));

// Update cameras

for(let camera of \[leftCamera, rightCamera]) {

camera.rotation.set(cameraRotation.x, cameraRotation.y, cameraRotation.z, 'YXZ');

}

\


const eyeGap = getSetting('Quick Settings/Eye Gap');

\


// Set camera positions

leftCamera.position.x = -1 \* eyeGap \* Math.sin(cameraRotation.y);

leftCamera.position.z = -1 \* eyeGap \* Math.cos(cameraRotation.y);

rightCamera.position.x = eyeGap \* Math.sin(cameraRotation.y);

rightCamera.position.z = eyeGap \* Math.cos(cameraRotation.y);

\


byId('camera-target-rot-x').innerHTML = cameraTargetRotation.x.toFixed(2);

byId('camera-target-rot-y').innerHTML = cameraTargetRotation.y.toFixed(2);

byId('camera-target-rot-z').innerHTML = cameraTargetRotation.z.toFixed(2);

byId('camera-rot-x').innerHTML = cameraRotation.x.toFixed(2);

byId('camera-rot-y').innerHTML = cameraRotation.y.toFixed(2);

byId('camera-rot-z').innerHTML = cameraRotation.z.toFixed(2);

\


byId('camera-left-rot-x').innerHTML = leftCamera.rotation.x.toFixed(2);

byId('camera-left-rot-y').innerHTML = leftCamera.rotation.y.toFixed(2);

byId('camera-left-rot-z').innerHTML = leftCamera.rotation.z.toFixed(2);

}

\


function takeScreenshot() {

downloadCanvasImage(document.getElementById('game-canvas'), gameName + ' screenshot');

sendAlert('Screenshot Taken!', 'tick');

};

\


function takePanorama() {

const canvas = document.getElementById('game-canvas');

const height = canvas.height;

const width = canvas.width \* (360 / (camera.fov \* camera.aspect));

let newCanvas = document.createElement('canvas');

newCanvas.height = height;

newCanvas.width = width;

newCanvas.style.display = 'none';

let context = newCanvas.getContext("2d");

document.body.appendChild(newCanvas);

for(let x = 0; x < width; x++) {

// Rotate

cameraRotation.y += ((2 \* PI) / width);

let calculatedRotation = rotationToAbsolute(playerPosition, cameraRotation);

camera.rotation.set(calculatedRotation.x, calculatedRotation.y, calculatedRotation.z, 'YXZ');

renderer.render(scene, camera);

const gl = renderer.getContext();

// Get canvas data

const pixelData = new Uint8ClampedArray(1 \* height \* 4);

const reversedPixelData = new Uint8ClampedArray(1 \* height \* 4);

gl.readPixels((canvas.width / 2), 0, 1, height, gl.RGBA, gl.UNSIGNED\_BYTE, pixelData);

for (let i = 0; i < height; i++) {

for (let j = 0; j < 4; j++) {

reversedPixelData\[i\*4 + j] = pixelData\[(height - i - 1)\*4 + j];

};

};

const imageData = new ImageData(reversedPixelData, 1, height);

context.putImageData(imageData, x, 0);

};

downloadCanvasImage(newCanvas, gameName + ' panorama');

newCanvas.remove();

sendAlert('Panoramic screenshot taken!', 'tick');

};

\


function setRotation(object, rotation) {

object.rotation.set(rotation.x, rotation.y, rotation.z);

};

\


function downloadCanvasImage(canvas, name) {

let canvasImage = canvas.toDataURL('image/png');

// this can be used to download any image from webpage to local disk

let xhr = new XMLHttpRequest();

xhr.responseType = 'blob';

xhr.onload = function () {

let a = document.createElement('a');

a.href = window\.URL.createObjectURL(xhr.response);

a.download = name;

a.style.display = 'none';

document.body.appendChild(a);

a.click();

a.remove();

};

xhr.open('GET', canvasImage); // This is to download the canvas image

xhr.send();

};

\


function xyToRealPosRot(x, y, distance) {

let realX, realY, realZ, rotX, rotY, rotZ;

\


// Position is an object {x: x, y: y} x determines which face it will be on horizontally, and y determines if it will be on the top or the bottom

// Beyond 400, x position wraps

x = wrap(x, 0, 400);

log('x before: ' + x)

const horizontalFace = (x / 100) % 4;

//rotY = (x / 400) \* (1) // horizontalFace);

\


// The top of the screen is y 100, the bottom is y -100, and the horizontals are between -50 and 50

realY = confine(y, -100, 100);

\


// Calculate real position

const unit = getSetting('Display/UI/Distance') / 50;

\


let forward = getSetting('Display/UI/Distance');

\


const bevel = getSetting('Display/UI/Bevel');

\


rotX = 0;

\


// If it is horizontal...

if(between(y, -50 + bevel, 50 - bevel)) {

realY = y;

rotX = 0;

} else if(y < -50 - bevel) {

// If it is on the lower face

realY = -50;

forward = (y + 100) \* unit;

rotX = -(PI / 2);

} else if(y >= 50 + bevel) {

// If it is on the upper face

realY = 50;

forward = (y - 100) \* unit;

//side = unit \* (((x - 50) % 100) + 50);

rotX = (PI / 2);

} else if(between(y, -50 - bevel, -50 + bevel)) {

// If it is on the lower bevel

realY = -50 - ((y + 50) / 2);

rotX = (PI / 4);

} else if(between(y, 50 - bevel, 50 + bevel)) {

// If it is on the upper bevel

realY = 50 + ((y - 50) / 2) ;

rotX = -(PI / 4);

}

\


realY = realY \* unit;

\


let flip = false;

\


/\*if(

(horizontalFace >= 0 && horizontalFace < 0.5) ||

(horizontalFace >= 1.5 && horizontalFace < 2.5) ||

(horizontalFace >= 3.5 && horizontalFace < 4)

) {

flip = true;

}\*/

\


let angle = (x / 400) \* (PI \* 2);

realX = Math.sin(angle) \* forward;

realZ = Math.cos(angle) \* forward;

rotY = angle;

log('rot y: ' + rotY)

\


log({

'x': realX,

'y': realY,

'forward': forward,

})

\


// Take distance into account

realX \*= distance;

realY \*= distance;

realZ \*= distance;

\


return({

'position': new THREE.Vector3(realX, realY, realZ),

'rotation': new THREE.Euler(rotX, rotY, rotZ, 'YXZ'),

'flip': flip

});

}

\


function addWidget({

name = '',

position = {'x': 0, 'y': 0},

rotation = {'x': 0, 'y': 0, 'z': 0},

distance = 1,

size = {'x': 10, 'y': 10},

radius = 3,

shape = 'rRect',

background = '#000000',

opacity,

textStyle = {

'align': 'center',

'weight': 0, // Range is 0 to 10

'font': 'DINRoundPro,arial,sans-serif',

'color': '#b0b0b0',

'vertical-align': 'center',

'font-size': 1 // Uses the same sizing system as the rest of the UI, so one unit of text is also one unit of object

},

textContent = '',

onclick = function() {},

onlongpress = function() {},

onhover = function() {},

onhoverexit = function() {},

ontruehover = function() {}

}) {

const realPosRot = xyToRealPosRot(position.x, position.y, distance);

log(realPosRot)

const realPos = realPosRot.position;

let realRot = realPosRot.rotation;

\


realRot.x += rotation.x;

realRot.y += rotation.y;

realRot.z = rotation.z;

\


// Calculate real size

const unit = getSetting('Display/UI/Distance') / 100;

\


let width = unit \* size.x;

let height = unit \* size.y;

radius \*= unit;

const scale = getSetting('Display/UI/Scale/General');

width \*= scale;

height \*= scale;

radius \*= scale;

\


// Set mesh geometry

let geometry;

switch(shape) {

case 'rRect':

geometry = roundRectangleGeometry(width, height, radius, 10);

break;

case 'rect':

geometry = new THREE.PlaneGeometry(width, height);

break;

case 'circle':

geometry = new THREE.CircleGeometry((width + height) / 2, 32);

break;

}

let material;

\


if(opacity == undefined) {

opacity = 1;

}

\


if(textContent == '') {

if(background\[0] == '/') {

loadTexture(background, function(texture) {

material = new THREE.MeshBasicMaterial({

map: texture,

side: THREE.DoubleSide,

opacity: opacity,

transparent: true

});

onTextureLoad(material);

})

} else {

material = new THREE.MeshBasicMaterial({

color: background,

side: THREE.DoubleSide,

opacity: opacity,

transparent: true

});

onTextureLoad(material);

}

} else {

function prepareText(canvas) {

// Proceed to prepare the canvas with the text

ctx.font = \`${textStyle\["font-size"]}em ${textStyle\["font"]}\`;

ctx.textAlign = textStyle\["align"];

ctx.fillStyle = textStyle\["color"];

ctx.fillText(textContent, 0, 0);

// Compose the text onto the background

const composedTexture = new THREE.CanvasTexture(canvas);

\


// Generate the material

material = new THREE.MeshBasicMaterial({

map: composedTexture,

side: THREE.DoubleSide,

transparent: true,

alphaTest: 0.5

});

\


onTextureLoad(material);

}

\


// Initialize tmpcanvas only when needed

const tmpcanvas = document.createElement('canvas');

tmpcanvas.width = width;

tmpcanvas.height = height;

const ctx = tmpcanvas.getContext('2d');

\
\


// Fill the background first

if (background\[0] == '/') {

loadTexture(background, function(texture) {

ctx.fillStyle = texture;

ctx.fillRect(0, 0, width, height);

\


prepareText(tmpcanvas);

})

} else {

ctx.fillStyle = background;

ctx.fillRect(0, 0, width, height);

\


prepareText(tmpcanvas);

}

}

function onTextureLoad(material) {

// Create a mesh with the geometry and the material

let mesh = new THREE.Mesh(geometry, material);

\


mesh.name = name;

\


mesh.position.set(realPos.x, realPos.y, realPos.z );

mesh.rotation.set(realRot.x, realRot.y, realRot.z);

\


if(realPosRot.flip) {

mesh.scale.x = -1;

}

\


mesh.onclick = onclick;

mesh.onlongpress = onlongpress;

mesh.onhoverexit = onhoverexit;

mesh.ontruehover = ontruehover;

mesh.onchover = onhover;

\


scene.add(mesh);

};

}

\


function transitionWidget(name, property, newProperty, time, condition) {

if(condition != null) {

}

}

\


// three.js Scene setup

const scene = new THREE.Scene();

\


// three functions

\


function loadTexture(path, onload) {

textureLoader.load(path, function (texture) {

onload(texture);

}, undefined, function (error) {

console.error(error);

});

};

\


// Define objects to make them global, they will mostly be only added to the scene when settings are loaded

let sun;

let wallpaper;

let cameraStream;

let pointer;

\


let pointerMaterial = new THREE.MeshBasicMaterial({

color: "hsl(0, 100%, 50%)",

side: THREE.DoubleSide

});

\


let segmentShape = new THREE.Shape();

let segmentGeometry = new THREE.ShapeGeometry(segmentShape);

let segmentPointer = new THREE.Mesh(segmentGeometry, pointerMaterial);

segmentPointer.name = 'segmentPointer';

\


function setSegmentPointer(angle = 0, radius = 0.1, rotation = new THREE.Euler(0, 0, 0), clockwise=true) {

let oldGeometry = segmentPointer.geometry;

\


let segmentShape = new THREE.Shape();

segmentShape.moveTo(0, 0);

segmentShape.arc(0, 0, radius, 0, angle, clockwise);

segmentShape.lineTo(0, 0);

\


let extrudeSettings = {

steps: 1,

depth: 0.1,

bevelEnabled: false

};

\


let segmentGeometry = new THREE.ExtrudeGeometry(segmentShape, extrudeSettings);

segmentPointer.geometry = segmentGeometry;

\


oldGeometry.dispose();

\


segmentPointer.rotation.set(rotation);

}

\


// Camera stuff

let cameraViewDistance;

\


// Setup cameras

let leftCamera;

let rightCamera;

let leftRenderer;

let rightRenderer;

\


function setRendererSize() {

for(let renderer of \[leftRenderer, rightRenderer]) {

let canvas = renderer.domElement;

renderer.setSize(

canvas.offsetWidth \* getSetting('Display/Anti-alias'),

canvas.offsetHeight \* getSetting('Display/Anti-alias'),

false

);

}

}

\


function updateCameraAspectRatio() {-0.2

for(let camera of \[leftCamera, rightCamera]) {

let canvas = leftRenderer.domElement;

camera.aspect = canvas.offsetWidth / canvas.offsetHeight;

camera.updateProjectionMatrix();

}

}

\


// temp

function startAssistant() {

log('assisstant')

}

\


// When settings are loaded, start settings stuff up

function onSettingsLoad() {

// Add sun

sun = new THREE.PointLight(0xffffff, getSetting('Quick Settings/Brightness'));

scene.add(sun);

\


// Pointers

pointer = new THREE.Mesh(new THREE.IcosahedronGeometry(getSetting('Display/UI/Pointer/Size'), 1), pointerMaterial);

pointer.name = 'pointer';

scene.add(pointer);

\


pointerMaterial = new THREE.MeshBasicMaterial(

{color: "hsl(" + (getSetting('Quick Settings/Theme Hue') + getSetting('Display/UI/Pointer/Hue Shift')) + ", 100%, 50%)"}

);

pointer.material = pointerMaterial;

segmentPointer.material = pointerMaterial;

\


// Add wallpaper

let wallpaperURL;

if(getSetting('Display/UI/Wallpaper/Use Direct Link') == true) {

wallpaperURL = getSetting('Display/UI/Wallpaper/Direct Link');

} else {

wallpaperURL = getSetting('Display/UI/Wallpaper/Wallpapers Folder') + '/' + getSetting('Display/UI/Wallpaper/Wallpaper');

}

\


loadTexture(wallpaperURL, function(texture) {

let material = new THREE.MeshStandardMaterial({

map: texture,

side: THREE.BackSide,

transparent: true,

opacity: getSetting('Display/UI/Wallpaper/Opacity')

});

\


wallpaper = new THREE.Mesh(

new THREE.IcosahedronGeometry(

getSetting('Display/UI/Distance') \* getSetting('Display/UI/Wallpaper/Distance') \* getSetting('Display/UI/Testing Size Multiplier'), 4),

material

);

wallpaper.scale.x = -1;

wallpaper.name = "wallpaper";

scene.add(wallpaper);

});

\


// Setup cameras

cameraViewDistance = getSetting('Display/UI/Distance') \* getSetting('Display/UI/Testing Size Multiplier') \* 2; // Keep this down to destroy lag

leftCamera = new THREE.PerspectiveCamera(80, 1, 0.001, cameraViewDistance);

rightCamera = new THREE.PerspectiveCamera(80, 1, 0.001, cameraViewDistance);

\


// Setup renderers

leftRenderer = new THREE.WebGLRenderer({canvas: byId('left-canvas'), antialias: true, logarithmicDepthBuffer: true, preserveDrawingBuffer: true, alpha: true});

rightRenderer = new THREE.WebGLRenderer({canvas: byId('right-canvas'), antialias: true, logarithmicDepthBuffer: true, preserveDrawingBuffer: true, alpha: true});

\


updateCameraAspectRatio();

setRendererSize();

\


window\.addEventListener('resize', function() {

updateCameraAspectRatio();

setRendererSize();

});

\


// Setup control center

const baseY = getSetting('Display/Control Center/Switch To Bottom') ? -100 : 100;

const backgroundFolder = getSetting('Display/Control Center/Icon Folder');

function createTileGrid(scale, x, y, farness, tiles, name) {

let counter = 0;

log(tiles)

addWidget({

position: {'x': x, 'y': baseY + y},

size: {'x': 3 \* scale, 'y': 3 \* scale},

background: "hsl(" + getSetting('Quick Settings/Theme Hue') + ", 50%, 80%)",

name: name + ' background',

radius: 0.5 \* scale,

onhover: openTileGroup(name)

});

for(let widgetY = 1; widgetY >= -1; widgetY--) {

for(let widgetX = -1; widgetX <=1; widgetX++) {

if(counter < tiles.length) {

if(tiles\[counter].folder) {

createTileGrid(scale / 3, (widgetX \* scale), (widgetY \* scale), farness \* 0.99, tiles\[counter].children);

} else {

log('scale' + scale)

addWidget({

position: {'x': x + (widgetX \* scale), 'y': baseY + y + (widgetY \* scale)},

size: {'x': scale, 'y': scale},

background: backgroundFolder + '/' + tiles\[counter].icon + '.svg',

name: tiles\[counter].name,

group: name,

radius: scale / 3,

distance: farness \* 0.99

});

log('added widget control center')

};

} else {

break;

};

counter++;

};

if(counter >= tiles.length) {

break;

};

};

};

\


createTileGrid(

getSetting('Display/UI/Scale/Control Center') \* 1.5,

0,

baseY,

1,

getSetting('Display/Control Center/Tiles'),

getSetting('Display/Control Center/Tiles', false)\['name']

);

// Quick function

let quickFunction = getSetting('Display/Control Center/Quick Function', false);

\


addWidget({

position: {'x': 0, 'y': getSetting('Display/Control Center/Switch To Bottom') ? 100 : -100},

background: '/assets/images/icons/control\_center/' + quickFunction.icon + '.svg',

name: quickFunction.name,

onclick: quickFunction.onclick

});

\


// testing

addWidget({

position: {'x': 0, 'y': -50},

background: '/assets/images/icons/control\_center/torch.svg',

name: "torch"

});

addWidget({

position: {'x': 200, 'y': 10},

background: '/assets/images/icons/control\_center/screencast.svg',

name: "screencast"

});

for(let i of range(16)) {

addWidget({

position: {'x': i \* 25, 'y': 0},

background: 'hsl(' + getSetting('Quick Settings/Theme Hue') + ', 100%, ' + ((i / 16) \* 100) + '%)',

name: "test" + i,

textContent: '',//i.toString()

'onclick': function() {

log('click' + i);

},

'onhover': function() {

log('hover' + i);

}

});

}

};

\


function updateSetting(url, value) {

customiseSetting(url, value);

\


switch(url) {

case 'Display/UI/Wallpaper/Opacity':

wallpaper.material.opacity = value;

break;

};

};

\


// Start

\


// Setup the camera stream

function setupCameraStream() {

function handleSuccess(stream) {

cameraStream = document.createElement('video');

cameraStream.style.transform = 'rotate(270deg)';

cameraStream.srcObject = stream;

cameraStream.play();

\


let texture = new THREE.VideoTexture(cameraStream);

texture.minFilter = THREE.LinearFilter;

texture.magFilter = THREE.LinearFilter;

scene.background = texture;

\


customiseSetting('Display/UI/Wallpaper/Opacity', 0); // Temporary until GUI settings are introduced

}

\


function handleError(error) {

// Set wallpaper opacity to 1

updateSetting('Display/UI/Wallpaper/Opacity', 1);

\


log('Unable to access the camera/webcam.');

}

\


navigator.mediaDevices.getUserMedia({video: {facingMode: "environment"}})

.then(handleSuccess)

.catch(function(error) {

if (error.name === 'OverconstrainedError') {

// Fallback to default video settings

navigator.mediaDevices.getUserMedia({video: true})

.then(handleSuccess)

.catch(handleError);

} else {

// Handle other errors

handleError(error);

}

});

};

\


// Fullscreen and pointer lock, request fullscreen mode for the element

function openFullscreen(elem, then) {

if (elem.requestFullscreen) {

elem.requestFullscreen().then(then);

} else if (elem.webkitRequestFullscreen) { /\* Safari \*/

elem.webkitRequestFullscreen().then(then);

} else if (elem.msRequestFullscreen) { /\* IE11 \*/

elem.msRequestFullscreen().then(then);

}

}

// Request pointer lock

function requestPointerLock(myTargetElement) {

const promise = myTargetElement.requestPointerLock({

unadjustedMovement: true,

});

\


if (!promise) {

log("disabling mouse acceleration is not supported");

return;

}

\


return promise

.then(() => log("pointer is locked"))

.catch((error) => {

if (error.name === "NotSupportedError") {

// Some platforms may not support unadjusted movement.

// You can request again a regular pointer lock.

return myTargetElement.requestPointerLock();

}

});

}

\


function lockPointer() {

requestPointerLock(byId('body'));

document.addEventListener("pointerlockchange", lockChangeAlert, false);

};

\


function lockChangeAlert() {

if (document.pointerLockElement === byId('body')) {

document.addEventListener("mousemove", updatePosition, false);

} else {

document.removeEventListener("mousemove", updatePosition, false);

}

}

\


function updatePosition(e) {

onLockedMouseMove(e.movementX, e.movementY);

};

\


function fullscreenAndPointerLock() {

openFullscreen(byId('body'), function() {

lockPointer();

});

}

\


function permission() {

// Check if the device supports deviceorientation and requestPermission

if (typeof(DeviceMotionEvent) !== "undefined" && typeof(DeviceMotionEvent.requestPermission) === "function") {

// Request permission

DeviceMotionEvent.requestPermission()

.then(response => {

// Check the response

if (response == "granted") {};

})

.catch(console.error); // Handle errors

} else {

// Device does not support deviceorientation

log("DeviceOrientationEvent is not defined");

}

}

\


async function keepScreenAwake() {

// Create a reference for the Wake Lock.

let wakeLock = null;

\


// create an async function to request a wake lock

try {

wakeLock = await navigator.wakeLock.request("screen");

log("Wake Lock is active!");

} catch (err) {

// The Wake Lock request has failed - usually system related, such as battery.

log(\`${err.name}, ${err.message}\`);

}

}

\


let framesSoFar = 0;

\


function startFPSCount() {

byId('logic-fps').innerHTML = fps.toString();

\


let renderFPSInterval = setInterval(function() {

byId('render-fps').innerHTML = framesSoFar.toString();

framesSoFar = 0;

}, 1000);

}

\


function start() {

byId('loading-screen').style.display = 'none';

setupCameraStream();

startLogic();

startFPSCount();

render();

permission();

fullscreenAndPointerLock();

keepScreenAwake();

\


byId('left-canvas').addEventListener('click', fullscreenAndPointerLock);

byId('right-canvas').addEventListener('click', fullscreenAndPointerLock);

};

\


// Loading

byId('loading-bar').style.display = 'block';

\


manager.onProgress = function (url, itemsLoaded, itemsTotal) {

//log('Loading file: ' + url + '.\nLoaded ' + itemsLoaded + ' of ' + itemsTotal + ' files.');

\


byId('loading-bar-fg').style.setProperty('--size', ((itemsLoaded / itemsTotal) \* 100) + '%');

};

\


manager.onError = function (url) {

log('There was an error loading ' + url);

};

\


manager.onLoad = function ( ) {

setTimeout(function() {

byId('loading-bar').style.display = 'none';

byId('play').style.display = 'block';

}, 500);

byId('play').addEventListener('click', start);

};

\


function openTileGroup(group) {

}

\


// Logic

let pointerRaycast = new THREE.Raycaster();

let previousIntersection = pointerRaycast.intersectObjects(scene.children);

let clicking = false;

\


function logic() {

// Set camera rotation

if(cameraTargetRotation.x != cameraRotation.x || cameraTargetRotation.y != cameraRotation.y) {

setCameraRotation();

};

\


// Update pointer

pointerRaycast.set(

new THREE.Vector3(0, 0, 0),

leftCamera.getWorldDirection(new THREE.Vector3())

);

\


// Check if the pointer is itersecting with any object

\


const intersections = pointerRaycast.intersectObjects(scene.children);

if (intersections.length > 0) {

for(let intersection of intersections) {

// If it's intersecting with itself, don't do anything

if(intersection.object.name == 'pointer' || intersection.object.name == 'segmentPointer') {

return;

} else {

// If it's intersecting with an object, copy that intersection's position, and start to click

const point = intersections\[0].point;

pointer.position.copy(point);

\


// Truehover

if(Object.keys(intersection.object).includes('ontruehover')) {

// Prevent hover being continuously trigggered

if(previousIntersection.uuid != intersections\[0].uuid) {

intersection.object.ontruehover();

}

}

log('truehover')

\


// Start click after grace period, if object is clickable

if(

Object.keys(intersection.object).includes('onclick') ||

Object.keys(intersection.object).includes('onhover') ||

Object.keys(intersection.object).includes('onhoverexit') ||

Object.keys(intersection.object).includes('onlongpress')

) {

let gracePeriod = setTimeout(function() {

// onhover

if(Object.keys(intersection.object).includes('onhover')) {

intersection.object.onhover();

}

log('hover')

\


// Start click

if(Object.keys(intersection.object).includes('onclick') && (!clicking)) {

clicking = true;

\


let fullness = 0;

\


// Manage pointers

scene.add(segmentPointer);

segmentPointer.position.copy(pointer);

scene.remove(pointer);

let startClick = setInterval(function() {

fullness += (PI \* 2) / (fps \* getSetting('Input/Eye Click/Duration/Pre-click duration'));

setSegmentPointer(

fullness,

getSetting('Display/UI/Pointer/Size') \* getSetting('Display/UI/Pointer/Clicking Size'),

intersection.object.rotation

);

\


byId('pointer-angle').innerHTML = fullness.toFixed(4);

\


// On forfeit

let forfeitDistance = distance3d(point, pointerRaycast.intersectObjects(scene.children)\[0].point);

if(forfeitDistance > getSetting('Input/Eye Click/Movement limit')) {

log('forfeit ' + forfeitDistance)

clearInterval(startClick);

afterClick();

}

\


if(fullness >= PI \* 2) {

log('click')

intersection.object.onclick();

clearInterval(startClick);

\


if(Object.keys(intersection.object).includes('onlongpress')) {

// Start longpress

fullness = 0;

let startLongPress = setInterval(function() {

fullness += (PI \* 2) / (fps \* getSetting('Input/Eye Click/Duration/Long-press duration'));

setSegmentPointer(

fullness,

getSetting('Display/UI/Pointer/Size') \* getSetting('Display/UI/Pointer/Clicking Size'),

intersection.object.rotation,

false

);

byId('pointer-angle').innerHTML = fullness.toFixed(4);

\


let forfeitDistance = distance3d(point, pointerRaycast.intersectObjects(scene.children)\[0].point);

if(forfeitDistance > getSetting('Input/Eye Click/Movement limit')) {

log('forfeitlongpress')

clearInterval(startLongPress);

afterClick();

};

\


// On click

if(fullness >= PI \* 2) {

intersection.object.onlongpress();

log('longpress')

clearInterval(startLongPress);

afterClick();

}

}, 1000 / fps);

} else {

afterClick();

}

}

}, 1000 / fps);

};

}, getSetting('Input/Eye Click/Delayed hover duration') \* 1000)

return;

} else {

afterClick();

}

\


function afterClick() {

// Update previous intersection

previousIntersection = intersections;

previousIntersection.intersection = intersection;

\


// Onhoverexit

if(intersection.object.uuid != previousIntersection.intersection.object.uuid) {

previousIntersection.object.onhoverexit();

}

\


clicking = false;

log('afterclick')

\


// Change back pointers

scene.remove(segmentPointer);

scene.add(pointer);

\


return;

}

}

}

};

};

\


function startLogic() {

logicInterval = setInterval(logic, 1000 / fps);

};

\


function stopLogic() {

clearInterval(logicInterval);

cameraStream.pause();

};

\


// Input

function onLockedMouseMove(xMotion, yMotion) {

cameraTargetRotation.x = confine(cameraTargetRotation.x - (yMotion \* cameraRotationSensitivity), -0.5 \* PI, 0.6 \* PI);

if(wrap(cameraTargetRotation.y - (xMotion \* cameraRotationSensitivity), -PI, PI) != (cameraTargetRotation.y - (xMotion \* cameraRotationSensitivity))) {

cameraRotation.y = wrap(cameraTargetRotation.y - (xMotion \* cameraRotationSensitivity), -PI, PI);

};

cameraTargetRotation.y = wrap(cameraTargetRotation.y - (xMotion \* cameraRotationSensitivity), -PI, PI);

setCameraRotation();

};

\


// Setup buttons

byId('toggle-debug').addEventListener('click', function(event) {

if(byId('debug-menu').style.display == 'block') {

byId('debug-menu').style.display = 'none';

} else {

byId('debug-menu').style.display = 'block';

}

});

\


// Keypress manager

const keysToPreventDefault = \['alt', '/', 'f1', 'f2', 'f3'];

\


function putKeyDown(key) {

if(!keysDown.includes(key.toLowerCase())) {

keysDown.push(key.toLowerCase());

};

};

\


function putKeyUp(key) {

keysDown = removeFromArray(keysDown, \[key.toLowerCase()]);

};

\


document.addEventListener('keydown', function(e) {

if(keysToPreventDefault.includes(e.key.toLowerCase())) {

e.preventDefault();

};

putKeyDown(e.key);

});

\


document.addEventListener('keyup', function(e) {

putKeyUp(e.key);

});

\


// Pointer position

document.addEventListener('mousemove', function(e) {

pointerPosition = {'x': e.clientX, 'y': e.clientY, 'positions': \[{'clientX': e.clientX, 'clientY': e.clientY}], 'type': 'mouse'};

});

\


document.addEventListener('touchmove', function(e) {

pointerPosition = {'x': e.touches\[0].clientX, 'y': e.touches\[0].clientY, 'positions': e.touches, 'type': 'touch'};

});

\


// Gyrometer

window\.addEventListener("deviceorientation", function(event) {

orientation = {

'absolute': event.absolute,

'alpha': event.alpha,

'beta': event.beta,

'gamma': event.gamma

};

\


byId('gyro-absolute').innerHTML = orientation.absolute;

byId('gyro-alpha').innerHTML = orientation.alpha.toFixed(2);

byId('gyro-beta').innerHTML = orientation.beta.toFixed(2);

byId('gyro-gamma').innerHTML = orientation.gamma.toFixed(2);

const theOrientation = (window\.offsetWidth > window\.offsetHeight) ? 'landscape' : 'portrait';

\


// If orientation is logged correctly

if(!Object.values(orientation).includes(null)) {

// Subtract 90deg if in portrait mode

if(theOrientation == 'portrait') {

orientation.alpha = wrap(orientation.alpha + 90, 0, 360);

}

\


// Offset y

const offsetY = 89.5; // I have no idea why this works

\


if(Math.abs(orientation.beta) < 100) {

cameraTargetRotation.x = (-orientation.gamma \* (PI / 180) % 180) - offsetY;

} else {

cameraTargetRotation.x = (orientation.gamma \* (PI / 180) % 180) + offsetY;

}

cameraTargetRotation.y = orientation.alpha \* (PI / 180);

cameraTargetRotation.z = (-orientation.beta \* (PI / 180)) + offsetY;

\


cameraRotation.x = cameraTargetRotation.x;

cameraRotation.y = cameraTargetRotation.y;

cameraRotation.z = cameraTargetRotation.z;

\


if(theOrientation == 'landscape') {

}

\


setCameraRotation();

};

}, true);

7
9
submitted 1 week ago* (last edited 1 week ago) by Chris_Kappa@lemmy.ml to c/programming@lemmy.ml

I always wondered. Are there any contemporary famous programmers who struggled to understand coding concepts, when they where at the beginning of their learning journey?

8
2

cross-posted from: https://lemm.ee/post/46066494

I followed the recommended processes for adding images to my app, and it is being displayed correctly on the layout preview, but not at all on the app. I have vector assets, webp, png images, but none are being displayed.

The project is too big to put here in its entirety, but please ask for any snippets that could help you solve the issue. I've tried searching the web and asking LLMs and neither could help, so please help me, fellow humans.

9
12
submitted 1 week ago by JRepin@lemmy.ml to c/programming@lemmy.ml

The Open Source Initiative (OSI) released the RC1 (“Release Candidate 1” meaning: This thing is basically done and will be released as such unless something catastrophic happens) of the “Open Source AI Definition“.

Some people might wonder why that matters. Some people come up with a bit of writing on AI, what else is new? That’s basically LinkedIn’s whole existence currently. But the OSI has a very special role in the Open Source software ecosystem. Because Open Source isn’t just based on the fact whether you can see code but also about the License that code is covered under: You might get code that you can see but that you are not allowed to touch (think of the recent WinAmp release debate). The OSI basically took on the role of defining which of the different licenses that were being used all over the place actually are “Open Source” and which come with restrictions that undermine the idea.

This is very important: Picking a license is a political act with strong consequences. It can allow or forbid different modes of interaction with an object or might put certain requirements to the use.

10
5
11
5
12
5
submitted 2 weeks ago* (last edited 2 weeks ago) by dadarobot@lemmy.sdf.org to c/programming@lemmy.ml

I'm working on a python program, and i need to sync the results to an ipad as a todo list (with checkboxes)

I had been using google keep, and manually copying /pasting the data over from my cli based app.

I will be out of the country for 2 weeks, so im updating my software to no longer being cli, and ideally syncing the final list to google keep or something similar, since someone else will be running the software. You know how normies get when they see a terminal window...

I tried this googlekeepapi thing i found online, but the authentication was very complicated and i couldn't get it to work. There is no specific reason we need to use google keep, was just the first thing that came to mind when we set this system up, and it works well and is cloud based.

Do yall know of any service where i can programmatically generate checkbox lists, and sync them over the web?

I should note i do not have a server available to self host. I could potentially spin something up locally with a raspberry pi, but would prefer not to have another potential point of failure.

13
14
submitted 2 weeks ago by yogthos@lemmy.ml to c/programming@lemmy.ml
14
7
submitted 2 weeks ago by yogthos@lemmy.ml to c/programming@lemmy.ml
15
8
submitted 2 weeks ago by yogthos@lemmy.ml to c/programming@lemmy.ml
16
10

Hi! I'm having a bit of a struggle with VSCodium. I'm not sure what I did, but I can't access the liveserver in my browser, and the extensions won't load to download them. I keep getting "Error fetching extensions. Failed to fetch" So that's been frustrating. Are there any fixes? What's a good VSCodium alternative I could try?

17
10
submitted 3 weeks ago by JRepin@lemmy.ml to c/programming@lemmy.ml

OGRE has grown to become one of the most popular open-source graphics rendering engines. It’s been 2 years since 2.3.0 and almost a year since the last 2.3.x release. It’s about time for 3.0.0!

  • Ogre to OgreNext name migration
  • Dealing with ABI mismatches: AbiCookie
  • ABI Semver
  • Move to C++11 and general cleanup
18
10
submitted 3 weeks ago by JRepin@lemmy.ml to c/programming@lemmy.ml

The GNU Compiler Collection (GCC) support for the C23 programming language standard is now considered "essentially feature-complete" with GCC 15. As such they are preparing to enable the C23 language version (using the GNU23 dialect) by default for the C language version of GCC when not otherwise specified.

Preparations are now underway to set the default C language version of GCC to GNU23 as the GNU dialect of C23. Or in other words, implying -std=gnu23 when no other C standard is specified.

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5
The C23 edition of Modern C (gustedt.wordpress.com)
submitted 3 weeks ago by JRepin@lemmy.ml to c/programming@lemmy.ml

This new edition has been the occasion to overhaul the presentation in many places, but its main purpose is the update to the new C standard, C23. The goal was to publish this new edition of Modern C at the same time as the new C standard goes through the procedure of ISO publication. The closest approximation of the contents of the new standard in a publicly available document can be found here. New releases of major compilers already implement most of the new features that it brings.

20
4
submitted 3 weeks ago by yogthos@lemmy.ml to c/programming@lemmy.ml
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12
submitted 4 weeks ago by JRepin@lemmy.ml to c/programming@lemmy.ml

This is a simple experimental Lisp compiler, written in uLisp, that will compile a Lisp function into RISC-V machine code. You can run the compiler on the RISC-V core of a Raspberry Pi Pico 2 (or another RP2350-based board)

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7
submitted 1 month ago by yogthos@lemmy.ml to c/programming@lemmy.ml
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Qt 6.8 Released (www.qt.io)
submitted 1 month ago by JRepin@lemmy.ml to c/programming@lemmy.ml

We are thrilled to announce the release of Qt 6.8, packed with support for new desktop, mobile, and embedded platforms, hundreds of improvements, and exciting new features to boost your development experience and meet the needs of demanding applications.

For this release we have focused on improving and stabilizing existing functionality. With over 500 bug fixes and performance improvements since Qt 6.7, your existing code will run better without changing a single line. On macOS, Qt Quick applications now integrate with the native menu bar, and for a native Windows 11 look they can use the new Fluent style. Resizing Quick windows is snappier on macOS with Qt 6.8, and on Windows the application start-up time has been improved by changing the default font database to DirectWrite.

Several modules that were under technology preview have been completed: Qt Graphs, Qt HttpServer, and Qt GRPC are promoted to be fully supported from this release on. Thanks to the feedback from our users we were able to finish those modules with substantial improvements since their initial introduction as technology previews.

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9
submitted 1 month ago by JRepin@lemmy.ml to c/programming@lemmy.ml

Recently I wondered what I get in term of C++ features for upgrading my system from version 13 to 14 of GCC...

Now, of course - a lot of bug fixes. Its surely a good idea to upgrade. But that doesn't answer my question. So a quick look at C++ compiler support showed that there is some interesting features, and mostly first C++26 support becoming available is one of them. Other features are more important to me though.

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2
submitted 1 month ago by yogthos@lemmy.ml to c/programming@lemmy.ml
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