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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cedarcantab

Feb 64 min read

Uniform Grid

/* ____ _ / ___|| | _____ | | | | _ | __ | | _____ _ \___ \| |/ \ \ /\ / / || |/ ` |/ ` |/ ...

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cedarcantab

Feb 34 min read

Studying Box2D-Lite in Javascript, Part 10: Polygon Shape

We have now recreated the basic functionalities of Box2D-Lite (but with a lot more code...) and added a circle. Although we created a...

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Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Weld Joint

cedarcantab

Jan 1711 min read

Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Weld Joint

The WeldJoint class represents a joint that “welds” two bodies together. This can be used to fix two bodies together as one, then removed...

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Extending Box2D-Lite in Javascript: Reboot

cedarcantab

Aug 28, 20239 min read

Extending Box2D-Lite in Javascript: Reboot

I was almost obsessed with converting Box2D-Lite into Javascript. It's been over a year since I completed the project, and I had not...

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Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Pulley Joint

cedarcantab

Aug 10, 20233 min read

Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Pulley Joint

The PulleyJoint class represents a joint connecting two bodies by a fixed length “rope.” The PulleyJoint only limits translation along...

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Extending Box2D-Lite in Javascript: Block Solver

cedarcantab

Aug 9, 20235 min read

Extending Box2D-Lite in Javascript: Block Solver

We can solve a small number of constraints simultaneously to improve SI. For example, in 2D collision between convex shapes there is one...

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

cedarcantab

Aug 9, 20232 min read

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

The line constraint is a constraint that restricts the movement of a pair of bodies to a prescribed "line". Dyn4j sites a car on a roller...

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

cedarcantab

Aug 8, 20231 min read

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

The AngleJoint class represents a joint connecting two bodies limiting their angles. This is similar to the RevoluteJoint when limits are...

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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 Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Motor Constraint

cedarcantab

Aug 6, 20234 min read

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

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Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Mouse Grabber Joint [WIP]

cedarcantab

Jul 17, 20237 min read

Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Mouse Grabber Joint [WIP]

mouse constraints. It is a very easy constraint to implement, and you don’t need any broad phase or narrow phase, just the resolution...

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Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Prismatic Constraint [WIP]

cedarcantab

Jul 17, 202312 min read

Extending Phaser 3 Geom.Rectangle to Box2D-Lite, Part XX: Prismatic Constraint [WIP]

A prismatic constraint is like the line constraint except it does not allow rotation about the anchor point. the Prismatic Joint is just...

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cedarcantab

Jul 2, 20235 min read

Marching Squares / Meta-Balls

The Marching Squares algorithm is a computer graphics technique used to generate contours for a two-dimensional scalar field, which is...

2 views0 comments

cedarcantab

Jun 29, 20232 min read

Shapematching [WIP]

The shape matching problem Consider a point set (the black points below) that defines a certain rigid shape. Suppose you move these...

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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...

12 views0 comments

cedarcantab

Jun 22, 20234 min read

Softbody Physics [WIP]

function CreateBall(x, y, radius, res) { var offset = 0; for (var i = 0; i < Math.PI 2; i += Math.PI 2 / res) { var cx = x +...

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Verlet Physics+ Circle vs Circle Collision

cedarcantab

Jun 17, 20231 min read

Verlet Physics+ Circle vs Circle Collision

class Dot extends Phaser.Geom.Point { constructor(scene, x, y, r) { super(x, y); this.scene = scene; // console.log("TIME=",...

9 views0 comments

Verlet Physics: Convex Polygon Collisions

cedarcantab

Jun 15, 202314 min read

Verlet Physics: Convex Polygon Collisions

Rigid Bodies class Vertex { constructor(world, body, x, y) { this.position = new Phaser.Math.Vector2(x,y); this.oldPosition = new...

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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...

43 views0 comments

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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