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How I built a lightning-fast Game Sens Converter in Vanilla JS

As a developer who frequently switches between competitive FPS titles like CS2 and Valorant, re-tuning mouse sensitivity is always a hassle. I wanted a fast, ad-free tool to translate my aim perfectly across titles, so I built a clean Game Sens Converter . The Approach I built this using 100% Vanilla JS. It’s a simple utility, so there was absolutely no need for a backend or heavy frameworks. It loads instantly and calculates right in the browser. Here is a quick look at the core logic handling the sensitivity conversion multipliers: function convertSensitivity ( gameFrom , gameTo , currentSens ) { // Standardized multipliers relative to CS2 / Source engine const multipliers = { ' cs2 ' : 1 , ' valorant ' : 3.181818 , ' overwatch ' : 0.3 , ' apex ' : 1 }; if ( ! multipliers [ gameFrom ] || ! multipliers [ gameTo ]) return null ; // Convert to base (CS2), then to the target game const baseSens = currentSens * multipliers [ gameFrom ]; const convertedSens = baseSens / multipliers [ gameTo ]; return convertedSens . toFixed ( 3 ); } Try it out You can use the live tool for free here: Game Sens Converter Let me know what your main game is or if you'd add any other FPS titles to the list in the comments!

2026-06-04 原文 →
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A Practical Guide to the ROS Navigation Stack: Core Components & Tuning

With rapid advances in robotics, autonomous navigation has become essential for mobile robots. The ROS Navigation Stack is the de facto open-source framework for building reliable, real-world navigation systems. It integrates perception, mapping, localization, path planning, and motion control into a unified pipeline. This article breaks down the core components, working principles, configuration best practices, and common pitfalls of the ROS Navigation Stack to help engineers build stable autonomous robots. Overview The ROS Navigation Stack is a collection of coordinated packages that enable a robot to: Localize itself on a map Plan global paths to a goal Avoid dynamic obstacles locally Control motion safely It relies on sensor inputs (LiDAR, depth cameras, wheel odometry, IMU) and outputs velocity commands to the robot base. Core Components move_base The central coordinator of the entire navigation system. Manages the navigation state machine Runs global and local planners Triggers recovery behaviors when the robot is stuck Exposes an Action interface for goal commands Key states: PLANNING, CONTROLLING, CLEARING, RECOVERY. AMCL (Adaptive Monte Carlo Localization) AMCL uses particle filter localization to estimate the robot’s pose on a pre-built map. Particle filter steps: Initialize particles over a pose distribution Predict motion using odometry Weight particles by sensor likelihood (LiDAR scan matching) Resample to keep high-confidence particles Output the weighted average pose AMCL is highly tunable: min_particles / max_particles laser_model_type odom_model_type update_min_d / update_min_a costmap_2d Costmaps represent the environment as a grid of “cost” values, indicating collision risk. Two costmaps: Global costmap: large-scale, slow-update, for path planning Local costmap: small-scale, fast-update, for obstacle avoidance Cost values: 0: free space 253: lethal obstacle 254: inscribed obstacle 255: circumscribed or unknown Inflation expands obstacles by the ro

2026-06-04 原文 →
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Building a SaaS engine in public: shipping the billing seam, not billing

I tagged v0.9.0 of LaraFoundry this week: billing. Except the honest headline is that I shipped the billing seam , not billing. The free core now has the whole shape of a subscription system, a payment-gateway contract, a driver manager, a real access gate over subscription columns, and it cannot take a single cent. That is on purpose, and the reason is the most interesting part of the phase. LaraFoundry is a SaaS core I'm extracting in public from a live CRM, one module at a time. The deal I made with myself early on: the core is free and stays free for everything except money. Auth, multi-tenancy, RBAC, the admin console, the activity log, i18n, files: all free. The day a business wants to charge its customers , that is the paid part. So billing could not just be "another module." It had to split cleanly down a line, with the free side carrying real, useful structure and the paid side carrying the parts that actually move money. The donor habit I would not carry Here is what the original CRM did when a company "paid" for its subscription: // TODO: real payment gateway integration // TEMPORARY: every payment is successful, for testing $paymentStatus = 'success' ; That success was hardcoded. There was no Stripe, no Paddle, no gateway at all. "Paying" wrote a row into a company_payments table and flipped the subscription date forward. For a CRM I run myself, with one real user, that was fine: I never needed the real thing, so the placeholder sat there indefinitely. The moment this becomes a reusable core, that placeholder is poison. A success that is always true is worse than no gateway, because it looks like billing works. So the rule for this phase was simple: the fake gateway does not get extracted. Whatever stands in its place has to be honest about the fact that it takes no money. What the seam actually is The free core ships a PaymentGatewayInterface : subscribe, cancel, refund, status, and verify a webhook. It describes only the mechanics of moving money. It d

2026-06-04 原文 →
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Improving My OWASP Authentication Failures Write‑Up Using GitHub Copilot

As part of the GitHub Copilot Challenge, I revisited one of my older cybersecurity notes on Authentication Failures and transformed it into a clear, structured, and SOC‑focused write‑up. This challenge helped me improve my technical writing, organise my thoughts, and explain concepts in a more human, readable way. * BEFORE GITHUB SCREENSHOTS: * AFTER GITHUB SCREENSHOTS: What I Improved I rewrote my entire explanation of authentication failures, focusing on: Token leakage Weak or missing MFA Poor session management Brute force & credential stuffing Misconfigured OAuth / SSO I also added SOC detection examples to make the content more practical and relevant for blue‑team work. How GitHub Copilot Helped GitHub Copilot supported me by: Suggesting clearer explanations Expanding short bullet points into meaningful content Helping me structure the write‑up Improving readability and flow Encouraging a more human, natural tone GitHub Repository Here is the updated write‑up in my repo: https://github.com/sujalavnelavai/Cybersecurity-Notes/blob/main/OWASP-Authentication-Failures/README.md Final Thoughts This challenge helped me understand authentication failures more deeply from a SOC and IAM perspective. It also improved my documentation skills — something extremely important for cybersecurity roles. I’m proud of the transformation and excited to continue building my cybersecurity learning notes.

2026-06-04 原文 →
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Navigating the Reorganized CrabPascal Docs | Navegando a documentação Mintlify

Bilingual post · Post bilíngue Jump to: English · Português English {#english} Navigating the Reorganized CrabPascal Docs Phase 1 of this blog series covered fundamentals — CLI, lexer, sprints, and how to contribute. If you read Contributing to CrabPascal: Get Involved , you already know where the repo lives and how to open a PR. Phase 2 is different: we walk the Mintlify documentation site the way a new teammate would, mapping each article to the pages you actually need in daily work. The live docs live at crabpascal.mintlify.app . The source is under mintlify/ in the Bitbucket repo. Think of Mintlify as the canonical handbook; Dev.to posts are the guided tour. Why the docs were reorganized CrabPascal grew from a v1.5 experimental interpreter (October 2025) to v2.22.0 with sprint-driven releases, Horse E2E tests, and honest build-exe . Old folders like documentation/00-INICIO/ still exist in git history, but Mintlify groups content by job to be done : You want to… Start here Install and run Quickstart See current capabilities Project status Understand architecture Architecture Follow releases Changelog Historical reports from v1.5–v2.8 remain under Histórico with archive banners — useful for context, not for "what works today." The home page is your compass Open the Mintlify index . It shows v2.22.0 at a glance: real diagnostic spans, System.* RTL, Unicode strings, dual-mode run/build, and Horse HTTP parity. Four cards link to quickstart, changelog, sprint roadmap, and technical-debt backlog. Essential CLI commands are listed once: crab-pascal check programa.dpr # diagnostics with line/column crab-pascal run programa.dpr # interpreter / runtime crab-pascal build-exe programa.dpr # native binary via C toolchain Bookmark this page. When someone asks "is feature X done?", check status + changelog before diving into Rust sources. The documentation map: question-driven navigation The page essentials/documentation-map is the "I want X, go to Y" cheat sheet. It answers sc

2026-06-04 原文 →
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