About the implementation method of CSS3 element 2D plane transformation attribute transform

CSS3’s shape transformation allows us to stretch, scale, etc.

In this article I will mainly talk about 2D plane transformation
Attributestrans form can be transformed
transform means deformation
and it is mainly used through the function . There are the following functions

• ##translate( ) Translation transformation

• ratate() Rotation transformation

• scale() Scale transformation

• skew () Oblique transformation

• matrix() Matrix transformation

transform-origin defines the center of the transformation

Translation transformation translate

translate() has two parameters, the first is the relative displacement of the x-axis, and the second parameter is the relative displacement of the y-axis

.demo {    ......
    transform: translate(100px, 200px);  <--
}

Or translate() can be split into translateX() and translateY()

(lowercase translatex/y is also acceptable)

.demo {    ......
    transform: translateX(100px) translateY(200px); /*改*/}

The two are equivalent, but very troublesome

The result is that the element is translated to the right by 100px and down by 200px

Rotation transformation rotate

rotate() has a parameter, indicating the 'xxdeg' of the rotation angle,

Positive numbers rotate clockwise, negative values ​​are allowed

.demo {    ......
    transform: rotate(30deg);}

The result is an element Rotated 30° in a clockwise direction

However, the default rotation center of the element is the center of the element
You can modify the transformation center using our transform-origin attribute
For example, we want to rotate the element along the upper left vertex

.demo {    ......
    transform: rotate(30deg);    transform-origin: 0 0; /*增*/}

The three parameters of transform-origin are x-axis distance (x-axis), y-axis distance (y-axis), z-axis distance (z-axis)

The default form is
transform- origin: 50% 50% 0; In addition to length and percentage, the x-axis optional values ​​include left, center,
right y-axis optional values ​​except length and Percentage, as well as
top, center, bottom z-axis optional value only has the length value, which we cannot use for the time being in
2D transformation

Scale transformation scale

Scaling an element is to change the size of the element

Two parameters, the width and height scaling magnification (unitless)
can also be split into scaleX() and scaleY()

.demo {    ......
    transform: scale(2,2);}

This is to double the width of the element and double the height

Note that this is the true meaning of scaling
It means that if there is text in your element, it will stretch. The effect
The equivalent form is as follows

.demo {    ......
    transform: scaleX(2) scaleY(3); /*改*/}

You can modify the transformation center through transform-origin

Oblique transformation skew

skew means oblique distortion

This function It will make your elements linearly distorted
Two parameters, the distortion angle of the x-axis and the y-axis, are also in the form of xxdeg

.demo {    ......
    transform: skew(10deg,20deg);}

Equivalent

.demo {    ......
    transform: skewX(10deg) skewY(20deg); /*改*/}

Can also be passed transform-origin Modify the transformation center and won’t go into details

Matrix transformation matrix

It sounds super NB, in fact

It’s really super NB
Matrix transformation is used less, it is The basics of all the above transformations
I don’t know very well
As a mathematics student, I am really ashamed T^T
The matrix transformation has 6 parameters, which can control the rotation, translation, tilt and scaling of the elements.
For example, the following code rotates the element by 30°, and translates the x and y axes by 20px each

.demo {    ......
    transform: matrix(0.866,0.5,-0.5,0.866,20,20);}

If you are interested in mathematics, I recommend Zhang Xinxu’s article portal

Maybe I will I also wrote an article on matrix on a whim...

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The things I want to talk about today are relatively simple, so I won’t include pictures

3D TransformationRelated attributes->Portal

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