详解rotate3()

（最后的旋转基准就是坐标原点(0,0,0)和(x,y,z)的连线，第四个参数a是旋转角度）

转自http://tympanus.net/codrops/css_reference/rotate3d/

The rotate3d() function is a 3D transform function that is used to rotate an element in three-dimensional space.

The element is rotated by an <angle> which is passed in as the fourth parameter of the function. The first three parameters specify the rotation direction, and together they form a direction vector [x, y, z] which is used to apply the rotation in the specified direction.

A positive angle value will rotate the element in the clockwise direction along the corresponding axis, and a negative value will rotate it in the counter-clockwise direction along that axis.

The clockwise direction is determined by looking at the vector starting from the end of the vector (where the pointing arrow usually is) towards the origin. The following image shows the positive (clockwise) direction of rotation along the three axes:

The positive direction of rotation along the three axes. Notice how if you stand at the end of each vector and look towards the origin, the clockwise rotation matches the one shown in the image.

The first three parameters of rotate3d() will specify the direction vector along which the rotation will happen, and the angle will specify the direction: clockwise along the vector or counter-clockwise.

Examples:

transform: rotate3d(1, 1, 2, 45deg);transform: rotate3d(2, 1, 3, 33deg);transform: rotate3d(1, 0, 0, 45deg); /* element is rotated clockwise along the x-axis by 45deg */transform: rotate3d(0, 1, 0, 45deg); /* element is rotated clockwise along the y-axis by 45deg */transform: rotate3d(0, 0, 1, 45deg); /* element is rotated clockwise along the z-axis by 45deg */transform: rotate3d(0, 0, 0, 50deg); /* NO ROTATION IS APPLIED */                

The following image shows the result of applying rotate3d(1, 1, 1, 50deg); to an image:

The result of applying rotate3d(1, 1, 1, 50deg); to an image

The official syntax looks as follows:

transform: rotate3d( <number> , <number> , <number> , <angle> );                

For a better understanding of the transform functions, please refer to the transform entry.

Browser Support

The following is the support table for three-dimensional CSS transforms:

Further Reading

• Transform on the Codrops CSS Reference
• CSS Transforms Module 1

Related Entries

• rotateX()
• rotateY()
• rotateZ()
• <angle>