Is it possible to generate an HTML element by utilizing an array of coordinates?

Question

Is it possible to generate an HTML element by utilizing an array of coordinates?

I have a set of 4 x/y coordinates that looks like this:

[{x: 10, y: 5}, {x:10, y:15}, {x:20, y:10}, {x:20, y:20}]

Is there a way to create an HTML element where each corner matches one of the coordinates in the array?

I am aware that this can be done using canvas, but I am struggling to figure out how to achieve it with HTML elements.

The array will always consist of 4 coordinate sets. The final shape may be rotated or skewed, but will always be a "valid" shape achievable through CSS transformations.

javascript html css

Answer 1

Answer №1

Assuming you have the coordinates in the form of

[topLeft, bottomLeft, topRight, BottomRight]

for the original rectangle, you can recreate it using the following method:

const obj1 = [{x: 10, y: 5}, {x:10, y:15}, {x:20, y:10}, {x:20, y:20}];
const obj2 = [{x: 40, y: 80}, {x: 10, y: 160}, {x: 120, y: 80}, {x: 90, y: 160}];
const obj3 = [{x: 200, y: 30}, {x: 150, y: 80}, {x: 250, y: 80}, {x: 200, y: 130}];

function render(obj) {
  const skewX = obj[1].x - obj[0].x;
  const skewY = obj[2].y - obj[0].y;
  let translateX = Math.min(...obj.map(t => t.x));
  let translateY = Math.min(...obj.map(t => t.y));
  if(skewX<0) translateX -= skewX;
  if(skewY<0) translateY -= skewY;
  const scaleX = Math.abs(obj[0].x - obj[2].x);
  const scaleY = Math.abs(obj[0].y - obj[1].y);
  const el = document.createElement('div');
  el.style.width = '1px';
  el.style.height = '1px';
  el.style.backgroundColor = 'blue';
  el.style.transformOrigin = 'top left';
  el.style.transform = `matrix(${scaleX}, ${skewY}, ${skewX}, ${scaleY}, ${translateX}, ${translateY})`;
  document.body.appendChild(el);
}

render(obj1);
render(obj2);
render(obj3);

However, I suggest storing the shapes as their transformation matrix rather than vertices (if feasible).

Answer 2

Assuming you have the coordinates in the form of

[topLeft, bottomLeft, topRight, BottomRight]

for the original rectangle, you can recreate it using the following method:

const obj1 = [{x: 10, y: 5}, {x:10, y:15}, {x:20, y:10}, {x:20, y:20}];
const obj2 = [{x: 40, y: 80}, {x: 10, y: 160}, {x: 120, y: 80}, {x: 90, y: 160}];
const obj3 = [{x: 200, y: 30}, {x: 150, y: 80}, {x: 250, y: 80}, {x: 200, y: 130}];

function render(obj) {
  const skewX = obj[1].x - obj[0].x;
  const skewY = obj[2].y - obj[0].y;
  let translateX = Math.min(...obj.map(t => t.x));
  let translateY = Math.min(...obj.map(t => t.y));
  if(skewX<0) translateX -= skewX;
  if(skewY<0) translateY -= skewY;
  const scaleX = Math.abs(obj[0].x - obj[2].x);
  const scaleY = Math.abs(obj[0].y - obj[1].y);
  const el = document.createElement('div');
  el.style.width = '1px';
  el.style.height = '1px';
  el.style.backgroundColor = 'blue';
  el.style.transformOrigin = 'top left';
  el.style.transform = `matrix(${scaleX}, ${skewY}, ${skewX}, ${scaleY}, ${translateX}, ${translateY})`;
  document.body.appendChild(el);
}

render(obj1);
render(obj2);
render(obj3);

However, I suggest storing the shapes as their transformation matrix rather than vertices (if feasible).

Answer 3

Answer №2

If you're looking to create shapes without using canvas, one option is to draw SVG shapes by adjusting the coordinates within your object.

For deforming a div, a possible solution could be utilizing CSS transform:matrix, although it might require some experimentation to translate x/y coordinates to scale/skew/translate parameters for each corner.

If you're not deforming the div and just aiming to create a standard rectangular shape, you can convert your x/y coordinates into top; left; width; height; CSS properties.

Answer 4

If you're looking to create shapes without using canvas, one option is to draw SVG shapes by adjusting the coordinates within your object.

For deforming a div, a possible solution could be utilizing CSS transform:matrix, although it might require some experimentation to translate x/y coordinates to scale/skew/translate parameters for each corner.

If you're not deforming the div and just aiming to create a standard rectangular shape, you can convert your x/y coordinates into top; left; width; height; CSS properties.

Answer 5

Answer №3

Actually, HTML follows a tree-like structured DOM format. While it is possible to create a DOM using position: absolute (positioned absolutely with respect to the html element) and use top: y; left: x, in my opinion, there are no distinct advantages to doing it this way.

Answer 6

Actually, HTML follows a tree-like structured DOM format. While it is possible to create a DOM using position: absolute (positioned absolutely with respect to the html element) and use top: y; left: x, in my opinion, there are no distinct advantages to doing it this way.

Is it possible to generate an HTML element by utilizing an array of coordinates?

Answer №1

Answer №2

Answer №3

Similar questions

Check the status of the audio source URL using JavaScript

What is the best way to run tests on this asynchronous function using Jasmine?

What is the best method for purging a previously stored variable from the cache when making an Ajax call and simultaneously passing a

Increasing a variable in MongoDB using Meteor.js based on the value of a variable in a separate document

What is the most effective method for configuring an npm module?

Utilizing JavaScript to assign class names to dynamically created elements from objects

The number field is persisting with its content even after submitting, while the other fields successfully clear up

Dynamic binding of CSS properties in AngularJS is a powerful feature that enables

Retrieve JavaScript functions as JSON or text in AngularJS and execute them

Guide on aligning text along a baseline

AngularJS encounters failure during shared data service initialization

Additional unnecessary event listeners (deleteComponent) were provided to the component but could not be inherited automatically

"Showing Off Your Steam Inventory on Your Website: A Step-by-

Node.js application abruptly halts without warning

Simulate mobile double tap screen resize using either jQuery or Javascript

CSS - image does not adhere to max-height when placed in a fluid container - link to jsFiddle

"Navigate through the page by scrolling with your mouse all the way to 100

Can arrays be passed as function parameters in CrossRider without the need to convert them into objects first?

Tips for showcasing req.validationError in a form

The buttons within the bootstrap navbar are not properly collapsing or resizing when the screen size is decreased, causing them to overlap and maintain their