Skip to main content

Phaser3, Matter physics, Calculate distance between a point and a physics shape

I'm currently working on a Phaser 3 game project, using Matter Physics. I created a matter.image object. In order to create a physics shapes, which I have to determine the coordinates of each vertex of the polygon outline like this, I used Physics Editor (https://www.codeandweb.com/physicseditor). It generates a JSON file include vertices, you can refer to Attachment #1.

Now I want to calculate the horizontal distance between the physics shape and a point. For example, in this figure, the blue one in the left is physics shape, and the blue one in the left is the point, and the green line is the horizontal distance I want to calculate.

Code used to create the object:

// in the preload() function
this.load.json('sprite', '../assets/chisato-sprite.json');

// in the create() function
sprites = this.cache.json.get('sprite');
chisatoLeft = this.matter.add.image(480, 425, 'chisatoLeft', null, { shape: sprites.left });

How can I do that?

Thanks in advance.

Attachment #1 Excerpt of the json file

{
    "generator_info": "Shape definitions generated with PhysicsEditor. Visit https://www.codeandweb.com/physicseditor",
    "left": {
        "type": "fromPhysicsEditor",
        "label": "left",
        "isStatic": true,
        "density": 0.10000000149011612,
        "restitution": 0,
        "friction": 0.10000000149011612,
        "frictionAir": 0.009999999776482582,
        "frictionStatic": 0.5,
        "collisionFilter": {
            "group": 0,
            "category": 1,
            "mask": 255
        },
        "fixtures": [
            {
                "label": "",
                "isSensor": false,
                "vertices": [
                    [ { "x":71, "y":226.5 }, { "x":76.5, "y":215 }, { "x":57.5, "y":216 } ],
                    [ { "x":166, "y":197.5 }, { "x":182.5, "y":169 }, { "x":164.5, "y":177 } ],
                    [ { "x":33.5, "y":214 }, { "x":29.5, "y":203 }, { "x":24.5, "y":206 } ],
                    [ { "x":198.5, "y":44 }, { "x":176, "y":38.5 }, { "x":162, "y":48.5 }, { "x":175.5, "y":50 } ],
                    [ { "x":175.5, "y":50 }, { "x":162, "y":48.5 }, { "x":168.5, "y":59 } ],
                    [ { "x":61, "y":223.5 }, { "x":57.5, "y":216 }, { "x":29.5, "y":203 }, { "x":47, "y":215.5 } ],
                    [ { "x":192.5, "y":61 }, { "x":168.5, "y":59 }, { "x":173, "y":68.5 } ],
                    [ { "x":159, "y":195.5 }, { "x":164.5, "y":177 }, { "x":173, "y":68.5 }, { "x":156.5, "y":180 } ],
                    [ { "x":129, "y":17.5 }, { "x":86, "y":10.5 }, { "x":85, "y":10.5 }, { "x":29.5, "y":203 }, { "x":156.5, "y":180 }, { "x":173, "y":68.5 }, { "x":168.5, "y":59 }, { "x":162, "y":48.5 } ],
                    [ { "x":20.5, "y":273 }, { "x":17.5, "y":341 }, { "x":26, "y":399 }, { "x":265.5, "y":381 }, { "x":226, "y":234.5 }, { "x":87.5, "y":231 }, { "x":47, "y":249.5 } ],
                    [ { "x":43, "y":219.5 }, { "x":47, "y":215.5 }, { "x":29.5, "y":203 } ],
                    [ { "x":208.5, "y":166 }, { "x":204.5, "y":130 }, { "x":200, "y":140.5 } ],
                    [ { "x":57.5, "y":216 }, { "x":76.5, "y":215 }, { "x":156.5, "y":180 }, { "x":29.5, "y":203 } ],
                    [ { "x":5.5, "y":152 }, { "x":24.5, "y":206 }, { "x":29.5, "y":203 }, { "x":85, "y":10.5 }, { "x":13.5, "y":64 }, { "x":5.5, "y":92 } ],
                    [ { "x":52.5, "y":20 }, { "x":32, "y":35.5 }, { "x":13.5, "y":64 }, { "x":85, "y":10.5 } ],
                    [ { "x":185.5, "y":201 }, { "x":189, "y":199.5 }, { "x":200.5, "y":161 }, { "x":200, "y":140.5 }, { "x":182.5, "y":169 } ],
                    [ { "x":182.5, "y":169 }, { "x":200, "y":140.5 }, { "x":204.5, "y":130 }, { "x":173, "y":68.5 }, { "x":164.5, "y":177 } ],
                    [ { "x":299, "y":400 }, { "x":265.5, "y":381 }, { "x":26, "y":399 } ],
                    [ { "x":87.5, "y":231 }, { "x":226, "y":234.5 }, { "x":217, "y":226.5 }, { "x":152.5, "y":212 }, { "x":92.5, "y":220 } ],
                    [ { "x":152.5, "y":212 }, { "x":156.5, "y":180 }, { "x":76.5, "y":215 }, { "x":92.5, "y":220 } ]
                ]
            }
        ]
    },
Via Active questions tagged javascript - Stack Overflow https://ift.tt/TF70WUq
Labels:

Comments

Post a Comment

Popular posts from this blog

Where and how is this Laravel kernel constructor called? [closed]

Where and how is this Laravel kernel constructor called? public fucntion __construct(Application $app, $Router $roouter) { } I have read the documentation and some online tutorial but I can find any clear explanation. I am learning Laravel and I am wondering where does this kernel constructor receives its arguments from. "POSTMOTERM" CLARIFICATION: Here is more clarity.I have checked the boostrap/app.php and it is only used for boostrapping the interfaces into the container class. What is not clear to me is where and how the Kernel class is instatiated and the arguments passed to the object calling the constructor.Something similar to; obj = new kernel(arg1,arg2) or, is the framework using some magic functions somewhere? Special gratitude to those who burn their eyeballs and brain cells on this trivia before it goes into a full blown menopause alias "MARKED AS DUPLICATE". To some of the itchy-finger keyboard warriors, a.k.a The mods,because I believe in th...
Post a Comment
Read more

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...
Post a Comment
Read more

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more