Rico贾若童的博客

Virtual Network Computing (VNC)

Graphical Desktop Environment

What is vncviewer vncviewer (virtual network computing) client allows one to interact with a remote computer’s graphical desktop environment. It’s run inside the docker. vncviewer Setup File Dir...

Posted by Rico's Nerd Cluster on May 1, 2024

Things About Leetcode Before That Coding Interview

Leetcode IDE Tips, Common Leetcode Problems, C++ Commands, String

Introduction At the bare minimum, it’s good to have a solid understanding of 2 Pointers, sliding window, BFS/DFS, Trees, Graphs, Stacks, Queus, Hash Maps. Leetcode IDE Tips No Global Variables ...

Posted by Rico's Nerd Cluster on May 1, 2024

Foundamental Structure of Programs

Callstack

Callstack A callstack is a stack of frames, where a frame represents an active call. Each frame has: return address (where the function returns after it completes), local variables. E.g., if func...

Posted by Rico's Nerd Cluster on May 1, 2024

Robotics - [2D SLAM 1] Hands-On Mapping

Point-Point ICP, Point-Line ICP

🧪 Loop Detection Testing Procedure Phase 1: Baseline Verification (No Loop Closure) Objective: Confirm that submaps are constructed correctly before enabling loop closure. Steps: Disable loo...

Posted by Rico's Nerd Cluster on April 16, 2024

Robotics - Gauss Newton (GN) and Levenberg Marquardt (LM) Optimizers

Newton's Method, GN, LM optimizers

Newton’s Method Solving An Equation To find an arbitrary equation’s root $f(x) = 0$, We start from an arbitrary point $x_0$ that’s hopefully close to the solution, $x_s$ The main idea of Ne...

Posted by Rico's Nerd Cluster on April 14, 2024

C++ - Filesystem

std::filesystem::create_directory(path) Thread safety: std::filesystem::create_directory(path); under the hood it issues a single POSIX mkdir() (or the platform equivalent). If the ...

Posted by Rico's Nerd Cluster on April 14, 2024

Robotics - [2D SLAM 2] Map Generation

Submap Generation

Submap Generation In modern robotics mapping systems, efficient environment representation and robust localization are achieved by dividing the map into smaller, manageable submaps. Each submap is...

Posted by Rico's Nerd Cluster on April 13, 2024

C++ - Segfaults

Out-of-bounds Iterator Access

Out-of-bounds Iterator Access Out-of-bounds iterator access is an undefined behavior, which might give a segfault, or give a garbage value. 1 2 3 4 5 6 7 8 9 10 11 12 #include <vector> #inc...

Posted by Rico's Nerd Cluster on April 12, 2024

Robotics - [2D SLAM 1] Introduction and Scan Matching

Point-Point ICP, Point-Line ICP

Introduction The assumption of a robot moving on a 2D plane is a strong one. However, many indoor robots do have support an assumption. Maps in this case can simply be interpreted as an image. Low...

Posted by Rico's Nerd Cluster on April 10, 2024

C++ - Move Semantics, Perfect Fowarding

Universal Reference, `std::move` with Emplace

Universal Reference And Perfect Forwarding Perfect forwarding in C++ preserves both the type and the value category of an input argument. Refresher - Value categories: lvalue rvalue ...

Posted by Rico's Nerd Cluster on April 10, 2024

Rico's Nerd Cluster

Virtual Network Computing (VNC)

Graphical Desktop Environment

Things About Leetcode Before That Coding Interview

Leetcode IDE Tips, Common Leetcode Problems, C++ Commands, String

Foundamental Structure of Programs

Callstack

Robotics - [2D SLAM 1] Hands-On Mapping

Point-Point ICP, Point-Line ICP

Robotics - Gauss Newton (GN) and Levenberg Marquardt (LM) Optimizers

Newton's Method, GN, LM optimizers

C++ - Filesystem

Robotics - [2D SLAM 2] Map Generation

Submap Generation

C++ - Segfaults

Out-of-bounds Iterator Access

Robotics - [2D SLAM 1] Introduction and Scan Matching

Point-Point ICP, Point-Line ICP

C++ - Move Semantics, Perfect Fowarding

Universal Reference, `std::move` with Emplace

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