COZY COZY WORLD

I am an ordinary Japanese salaryman in his 50's.
The posts are mostly about my attempts at programming which I have taken up recently to maintain logical thinking.
And a bit about my travels around the country.

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Extending Box2D-Lite in Javascript: Support Point based SAT

cedarcantab

Apr 164 min read

Extending Box2D-Lite in Javascript: Support Point based SAT

Separating Axis Theorem utilising Support Points In my various implementations of the separating axis theorem for detecting collision...

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Extending Box2D-Lite in Javascript: Clipping for Contact Points

cedarcantab

Feb 294 min read

Extending Box2D-Lite in Javascript: Clipping for Contact Points

This is a continuation of our look into the CollidePolgyons method. We have delved into the Lite implementation in quite some detail and...

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Studying Box2D-Lite in Javascript, Part 2: Contact Manifold

cedarcantab

Feb 274 min read

Studying Box2D-Lite in Javascript, Part 2: Contact Manifold

Background In Lite, collision detection and response involved the following key classes / methods. Arbiter Collide The above classes /...

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Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Max Distance Constraint

cedarcantab

Aug 7, 20232 min read

Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Max Distance Constraint

As a follow up post to the Distance Constraint post, we can also create a maximum distance constraint using the same solution we found in...

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Extending Box2D-Lite in Javascript: Distance Joint

cedarcantab

Jun 23, 20233 min read

Extending Box2D-Lite in Javascript: Distance Joint

It's been a while since I finished with my walkthrough of Box2D-Lite. I thought I would add features that are not available in the...

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Box2D-Lite Walkthrough in Javascript: Warm Starting

cedarcantab

Sep 25, 20221 min read

Box2D-Lite Walkthrough in Javascript: Warm Starting

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

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Box2D-Lite Walkthrough in Javascript: Softening constraints

cedarcantab

Sep 21, 20221 min read

Box2D-Lite Walkthrough in Javascript: Softening constraints

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

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Box2D-Lite Walkthrough in Javascript: Revolute Joint

cedarcantab

Sep 20, 20221 min read

Box2D-Lite Walkthrough in Javascript: Revolute Joint

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

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Box2D-Lite Walkthrough in Javascript: Friction

cedarcantab

Sep 13, 20221 min read

Box2D-Lite Walkthrough in Javascript: Friction

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

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Box2D-Lite Walkthrough in Javascript: Solving Constraints

cedarcantab

Sep 8, 20221 min read

Box2D-Lite Walkthrough in Javascript: Solving Constraints

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

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Box2D-Lite Walkthrough in Javascript: Contact constraint

cedarcantab

Sep 7, 20221 min read

Box2D-Lite Walkthrough in Javascript: Contact constraint

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

90 views0 comments

Box2D-Lite Walkthrough in Javascript: Introduction to Constrained Dynamics

cedarcantab

Sep 6, 20221 min read

Box2D-Lite Walkthrough in Javascript: Introduction to Constrained Dynamics

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

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Box2D-Lite Walkthrough in Javascript: Generating Contact Points

cedarcantab

Aug 30, 20221 min read

Box2D-Lite Walkthrough in Javascript: Generating Contact Points

Contact Points using Clipping Method All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and...

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Box2D-Lite Walkthrough in Javascript: Collision Detection

cedarcantab

Aug 23, 20221 min read

Box2D-Lite Walkthrough in Javascript: Collision Detection

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

34 views0 comments

Box2D-Lite Walkthrough in Javascript: Introduction

cedarcantab

Aug 13, 20221 min read

Box2D-Lite Walkthrough in Javascript: Introduction

All my Box2D-Lite posts have been transferred to my new blog site: Introduction Different Spaces and Drawing Boxes Unconstrained Dynamics...

13 views0 comments

Understanding 2D Physics Engines with Phaser 3, Part 23.1: Constrained Dynamics: Introduction

cedarcantab

Jul 17, 20228 min read

Understanding 2D Physics Engines with Phaser 3, Part 23.1: Constrained Dynamics: Introduction

Introduction In this post I start to look into the deep world of Constraints and Constraint Solvers. You will appreciate why I say deep,...

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Understanding 2D Physics Engines with Phaser 3, Part 21: Local (Model) space vs World space

cedarcantab

Jul 4, 20225 min read

Understanding 2D Physics Engines with Phaser 3, Part 21: Local (Model) space vs World space

Local vs World space In this post I document the introduction of the concept of local space vs world space. Frankly, the concepts are not...

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Understanding 2D Physics Engines with Phaser 3, Part 19: Clipping Method

cedarcantab

Jul 1, 202210 min read

Understanding 2D Physics Engines with Phaser 3, Part 19: Clipping Method

Finding Contact Points of overlapping Convex Polygons using the Clipping Method The separating axis theorem can tell us whether a polygon...

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Understanding 2D Physics Engines with Phaser 3, Part 17.1: Collision Response with Rotation

cedarcantab

Jun 19, 20223 min read

Understanding 2D Physics Engines with Phaser 3, Part 17.1: Collision Response with Rotation

Capsule to Capsule Collision response with Rotation Having dealt with the concepts of center of mass and mass moment of inertia, we...

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Mass Moment of Inertia: Arbitrary Triangle

cedarcantab

Jun 9, 20222 min read

Mass Moment of Inertia: Arbitrary Triangle

Momentum and Impulse In this post I try to explain how the moment of inertia of an arbitrary triangle may be derived (full disclosure:...

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