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This article mainly explains "how to make a digital clock with HTML5". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to make a digital clock with HTML5.

Copy the code

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Var numData = [

"1111ax 1001max 1001max 1001max 1111", / / 0

"00010001Compact 0001GUBE 0001GUBE 0001", / / 1

"11110001GUP 0001ax 1111G 1000UX 1111", / 2

"11110001amp 0001max 1111", / / 3

"1010, 10, 10, 10, 10, 10, 10, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 0010, / / 4.

"1111Universe 1000Compare 1000Universe 0001Compact 0001Uniq1111", / / 5

"1111lime 1000amp 1000amp 1111prime 1001max 1001max 1111", / / 6

"11110001amp 0001max 0001max 0001max 0001", / / 7

"1111Accord 1001Compare 1001According to 1001According to 1001plash 1111", / / 8

"1111Accord1001Compare 1001According to 0001Unix0001Unix1111", / / 9

"00000.0000Universe 00100.0000000000000000000000000000000.000", / /:

]

0 means there are no pixels, 1 means there are pixels, / in order to look better, that is, branches, to put it simply: for example, 0 is:

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1 1 1

1 0 0 1

1 0 0 1

1 0 0 1

1 0 0 1

1 0 0 1

1 1 1

That makes it very clear. From 0 to 9, there is also a: sign is represented by a string.

Then write a particle object, that is, a pixel:

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Var P_radius = 8pm Gravity = 9.8

Var Particle = function () {

This.x = 0

This.y = 0

This.vx = 0

This.vy = 0

This.color = ""

This.visible = false

This.drop = false

}

Particle.prototype = {

Constructors:Particle

Paint:function () {/ / draw itself

Ctx.fillStyle = this.color

Ctx.beginPath ()

Ctx.arc (this.x,this.y,P_radius,0,2*Math.PI)

Ctx.fill ()

}

Reset:function (xmeny color) {/ / reset

This.x = x

This.y = y

This.vx = 0

This.vy = 0

This.color = color

This.visible = true

This.drop = false

}

IsDrop:function () {/ / fall

This.drop = true

Var vx = Math.random () * 20,15

This.vx = Math.random () > = 0.5?-vx: vx

}

Update:function (time) {/ / actions at each frame

If (this.drop) {

This.x + = this.vx*time

This.y + = this.vy*time

Var vy = this.vy+Gravity*time

If (this.y > = canvas.height-P_radius) {

This.y = canvas.height-P_radius

Vy =-vy*0.7

}

This.vy = vy

If (this.xcanvas.width+P_radius | | this.ycanvas.height+P_radius) {

This.visible = false

}

}

}

}

The properties of particle objects are relatively simple, in terms of position, speed, and whether they are visual or not. Method, paint is the drawing method, reset is the reset (because the particles are to be recycled, to improve performance), isDrop is the particle falling method, update is the action to update the particles every frame, and when the particle moves beyond the drawing area of the canvas, its visualization is set to false and saved in the particle container waiting for the next call.

After you have written the particle object, you have to consider how to draw the particle according to its position, and allow the particle to animate freefall when it is not needed.

Draw the background first (that is, the white dot without pixels):

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Function drawBg () {

Var tx = (canvas.width- ((P_radius*2+X_J) * 4*8+7*xjg)) / 2

For (var iTuno Bandi)

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