How to apply Canvas coordinates and paths

This article mainly explains "how to apply Canvas coordinates and paths". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn how to use Canvas coordinates and paths.

Canvas coordinates

Canvas is a two-dimensional grid.

The coordinate of the upper-left corner of canvas is (0pm 0).

The above fillRect method has parameters (0re0rec 15015015075).

Draw the rectangle of 150x75 on the canvas, starting at the upper left corner (0jin0).

Canvas- path

To draw lines on Canvas, we will use the following two methods:

MoveTo (xPowery) defines the line start coordinates

LineTo (xPowery) defines the line end coordinates

We must use the method of "ink" to draw lines, just like stroke ().

Example

Define the start coordinates (0J0) and the end coordinates (200100). Then use the stroke () method to draw the line:

_ JavaScript:

Varc=document.getElementById ("myCanvas")

Varctx=c.getContext ("2d")

Ctx.moveTo (0Pol 0)

Ctx.lineTo (200100)

Ctx.stroke ()

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