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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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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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: 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: 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...

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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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cedarcantab

Jun 12, 20226 min read

2D Raycasting using Phaser 3, Part 4

Exploring the Geom.Intersects.GetLineToPolygon method In my exploration of 2D raycasting using Phaser 3, I created simple 2D raycasters...

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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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cedarcantab

Jun 6, 20222 min read

Mass Moment of Inertia: Rectangle

Before continuing our challenge to derive the mmoi for other shapes, I will introduce two important theorems that will help us as we deal...

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Mass Moment of Inertia (MMOI): Introduction

cedarcantab

Jun 5, 20224 min read

Mass Moment of Inertia (MMOI): Introduction

Angular Momentum, Moment of Inertia In prior posts we have discussed momentum, which we have assumed to be mass x velocity. In a world...

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Center of Mass of Lamina: Arbitrary Triangle

cedarcantab

Jun 1, 20223 min read

Center of Mass of Lamina: Arbitrary Triangle

In the previous post we worked through the calculation of the centroid of an isosceles triangle. In this post we delve into the...

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Sloped Tile Collision Detection in Phaser 3

cedarcantab

May 28, 20228 min read

Sloped Tile Collision Detection in Phaser 3

Making Characters Climb Sloped Tiles After a long and tortuous journey I finally managed to get CozyPhysics engine to work with partial...

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Partial Tile Collision in Phaser 3: Climbing "Slopes"

cedarcantab

May 14, 20225 min read

Partial Tile Collision in Phaser 3: Climbing "Slopes"

Having worked out the basic logic for detecting collisions with partial tiles, there is light at the end of the tunnel to making Mario...

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Partial Tile Collision in Phaser 3: The Basics

cedarcantab

May 14, 20224 min read

Partial Tile Collision in Phaser 3: The Basics

Finally, we go beyond recreating (cut-down version of) Phaser's arcade physics engine, and tackle the problem of partial tiles. The...

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Pixel Perfect Tile Collision in Phaser 3, Part 2

cedarcantab

May 13, 20224 min read

Pixel Perfect Tile Collision in Phaser 3, Part 2

Introducing gravity and bounce In the previous post I got as far as recreating basic tile collisions for my CozyPhysics engine. The...

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Pixel Perfect Tile Collision in Phaser 3, Part 1

cedarcantab

May 12, 20229 min read

Pixel Perfect Tile Collision in Phaser 3, Part 1

Cozy Physics Engine: Starting from the beginning Now that I have gained some understanding of how Phaser's arcade physics engine deals...

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Pixel Perfect Tile Collision in Phaser 3, Part 0B

cedarcantab

May 10, 20227 min read

Pixel Perfect Tile Collision in Phaser 3, Part 0B

In this post, I continue to explore the insides of the Phaser arcade physics engine relating to sprite vs tile collisions. Detecting...

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