Rumah >hujung hadapan web >html tutorial >Cipta kecerunan jejari JS menggunakan matriks dalam HTML
Kecerunan matriks jejari JSR dicipta dengan cara berikut. Anda boleh cuba menjalankan kaedah berikut untuk mencipta kecerunan JS Radial menggunakan matriks -
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>
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