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Create JS Radial gradient with matrix in HTML
JSRadial gradient with matrix is created in the following way. You can try to run the following way to create JS Radial gradient with matrix −
var canvas1 = document.getElementById("canvas"); //canvas1 variable to identify given canvas
var ctx1 = canvas.getContext("2d"); //This is used to tell context is 2D
var gradient1 = ctx1.createRadialGradient(100/horizontalScale, 100/verticalScale, 100,
100/horizontalScale,100/verticalScale,0); //This will create gradient with given canvas context
gradient1.addColorStop(1,"green"); //New color green is added to gradient
gradient1.addColorStop(0,"red"); //New color red is added to gradient
ctx1.scale(horizontalScale, verticalScale); //Context matrix ctx1 is shrinked according to horizaontal
and vertical scale
ctx1.fillStyle = gradient; //Given gradient is drawn
ctx1.fillRect(0,0, 100/horizontalScale, 100/verticalScale); //Rectangle is stretched according to scale
ctx1.setTransform(0,1,1,0,1,1); //Context matrix is reset
canvas {
background-color: purple;
}
//Canvas is drawn with background color purple
<canvas id = "canvas" width = "300" height = "300"></canvas>
Updated on: 02-Jun-2020
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