and then realize the painting function on the canvas of the background map, such as drawing a circle and so on. I want to make a rubber Sassafras function, which can remove part of the circle without affecting the background image. How can this be realized? I use canvas"s API clearRec () to erase the background image,
.give me an idea on mobile phone
Draw () {
clear ()
DrawBackground ()
DrawForeground ()
}
just keep draw
do two layers of Canvas
save restore
to complete the following effect diagram, the move: method cannot achieve the desired automatic movement at the speed shift 2, . ...
first post the link https: www.hotsarstore.com home like the effect of the home page, 1, mouse skimming and so on to show 2, hair effect? How to describe 3, Light and Shadow Movement Please ...
online check seems to be through the removal of the canvas, re-painted, so can you directly move without cleaning the previous canvas. ...
original image size: 750x1334 canvas size: 750X1334 I m going to lay a 750x1334 picture as the background on the canvas of 750x1334. the code is as follows: var image = new Image() image.src = img background.png image.onload = drawImg ...
it is known that a polygon consists of n squares of the same size (this polygon is not necessarily a rectangle, but it must be a figure made up of squares). To cut this figure, you can only cut from the edge of each square. When you click submit, you can...
The scenario goes like this: generate a poster with canvas. Click the button to start drawing the poster, which contains a background image , and a pop-up window that converts the painted canvas into a picture and displays it in the pop-up window. the...