Learn html - html tutorial - Settransform method in html5 canvas - html examples - html programs
- The setTransform() method is used to resets the current transform to the identity matrix.
- It runs transform() with the same arguments.
- The setTransform() method is used to scale, rotate, move, and skew the context
Syntax for fillText() Method in HTML5 Canvas:
context.setTransform(a,b,c,d,e,f);
Parameter values for setTransform() Method in HTML5 Canvas:
| Parameter |
Description |
| a |
Horizontal scaling |
| b |
Horizontal skewing |
| c |
Vertical skewing |
| d |
Vertical scaling |
| e |
Horizontal moving |
| f |
Vertical moving |
Sample Coding for setTransform() Method in HTML5 Canvas:
Tryit<!DOCTYPE html>
<html>
<head>
<title>wikitechy-setTransform() method in Canvas</title>
</head>
<body>
<h2>Wikitechy-setTransform() method in canvas</h2>
<canvas id="wikitechyCanvas" width="400"
height="250" style="border:1px solid #d3d3d3;">
</canvas>
<script>
var canvas = document.getElementById("wikitechyCanvas");
var context = canvas.getContext("2d");
context.fillStyle = "skyblue";
context.fillRect(10, 10, 250, 100);
context.setTransform(4,0.5, -0.5, 1, 30, 15);
context.fillStyle = "pink";
context.fillRect(0, 0, 250, 100);
context.setTransform(1,0.5, -0.5, 1, 30, 10);
context.fillStyle = "blue";
context.fillRect(0, 0, 250, 100);
</script>
</body>
</html>
Code Explanation for setTransform() Method in HTML5 Canvas:
- ”wikitechyCanvas” is used to declare the id value of the canvas tag.
- getElementById: method is used to draw the element from canvas id value.
- The canvas.getContext() method returns an object that provides methods and properties for drawing on the canvas.
- The context.fillStyle() method is used to fill a skyblue color to the rectangle.
- The context.fillRect() method is used to draws a "filled" rectangle (10,10,250,100) in (x0,y0,x1,y1).
- The context.setTransform() method is used to “setTransform” a diagram (4,0.5, -0.5, 1, 30, 15) in (a,b,c,d,e,f)
- The context.fillStyle() method is used to fillstyle of a diagram (pink color rectangular box)
- The context.fillRect() method is used to draws a "filled" rectangle (0,0,250,100) (x0,y0,x1,y1)
- The context.setTransform() method is used to “setransform” a diagram (1, 0.5, -0.5, 1, 30, 10); (a,b,c,d,e,f)
- The context.fillstyle() method is used to fillstyle of a diagram (blue color rectangular box)
- The context.fillRect() method is used to draws a "filled" rectangle (0, 0, 250, 100); in (x0,y0,x1,y1)
Output for setTransform() Method in HTML5 Canvas:
- The rectangle is drawn with this parameter (0,0,250,200) and filled with skyblue color
- <canvas>tag is used to draw a rectangle with gray color border.
- The rectangle is drawn with this parameter (0,0,250,100) and filled with pink color
-context.setTransform (4,0.5, -0.5, 1, 30, 15);
- The rectangle is drawn with this parameter (0,0,250,100)and filled with blue color
-context.setTransform (1, 0.5, -0.5, 1, 30, 10);
Browser Support for setTransform() Method in HTML5 Canvas:
Tips and Notes
- The transformation will only affect drawings made after the setTransform() method is called.
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