HTML5 Canvas Tutorial Draw Lines and Filled Shapes Using JavaScript

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In this HTML5 canvas lesson we demonstrate how to plot and draw lines for custom shapes. Learn to draw shapes, fill them, stroke them, color them, and complete the homework assignment laid out in the video.

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oh my god, it actually works, i've been doing this the hard way for so long, lol

i never learned it had in built functions for this

memesalldayjack

Yey!!

Basic maths, but it took a face-plant to see it, and I'm only a beginner. Great tuts by the way. :D

SDNeeve_Author

Man, you're little crazy :) You are the BOSS!

sspabu

@ktbsupremo Alpha is the transparency of the fill color. 1 for opaque, 0 for totally transparent or invisible.

RcmOmega

Cordial greetings. The other "flap" dimensions would be (approximately in sequence): ctx.beginPath(); ctx.moveTo(125, 60); ctx.lineTo(112, 72); ctx.lineTo(130, 95); ctx.lineTo(150, 70); ctx.lineTo(135, 180); ctxfill();

btwineume

Great tutorial thanks. Do you know what they browser compliance is like for this?

SharmaYelverton

hola, oye una pregunta en la parte de al principio de tu video, mencionas algo acerca de de la lógica para crear figuras con el ratón?, la pregunta seria haz tratado o desarrollado un programa que dibujes lineas con el raton pero a la vez con esas lineas hagas figuras como cuadrados o poligonos y que a la vez los guardes?? como muestras al principio del video

adriansilviano

Can you make a tutorial like how to create and resize a line in canvas? this appear in minute 0:58 i want to do that with the mouse like you in minute 0:58

Sobaco

how did you know which numbers ctx.lineTo(65, 40); did you use a graph calculator

lwsalahm

How do you increase the thickness of the line when you are stroking?

HarHar_hariOm

i waana learn coordinates. can u please help me for this. Like how can i make different drawing using coordinates. Any tools available for that. ?

nidhivadiwala

how can we draw something on an editor...ps, ai, and find out the exact coordinates to enter them in the canvas to obtain the exact image we want....?/??

neapopica

Is this faster rendered than an image?

smvsoren

Why do we need alpha?
do I have to put it in the fill style.

ktbsupremo

someone please explain to me why this does not work.<!DOCTYPE html>
<html>
<head>
<title>Test</title>
</head>
<body>
<canvas id="paper" width="300" height="500"></canvas>
<script>
window.onload=draw;
function draw(){
var
var ctx=paper.getContext("2d")
ctx.rect(200, 200, 100, 60)
ctx.fill("black")
}
</script>
</body>
</html>

masterpaper

I did exactly how it was in the video but it isn't working.
Can someone help me?

tarun

Can anyone help me how to understand X Y coordinates

anomy

@smvsoren Good question ?! am also interested in the answer...

neapopica

how to draw democratic republic of congo flaf usig html and css, plz send me all code

MdIrfan-vzsi

hello, where's the next tutorial ?

umarkhay

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