This time we're going to use CSS filters to achieve the effect of a flame.
Explain
To achieve the above flame effect, let us first understand some of the necessary things.
Last time we talked about two filters, blur and contrast.
Blur is to set the image Gaussian blur, contrast is to adjust the contrast of the image, they use together will produce a fusion effect.
It is important to set this in the red background of the figure filter:contrast(20); , two circles set filter:blur(10px); if not clear, we look at the comparison.
Well know this, we start to realize the flame effect.
These 3 steps are roughly required:
1. Draw the triangle with the border first
You know, if width is 0,height is also 0, only with the border, the border is triangular, we look at width and height are 0, but the border width is 100px of the elements look like
, 4 sides of the border color is not the same, we clearly see the 4 triangles, we now need one of the following things, I believe you know how to achieve.
2, adjust the size and color of the triangle to achieve similar flame appearance
This step is simple, we just need to add these three lines of code to the already implemented triangles above
Border-radius:45%;transform:scalex (. 4); Filter:blur (20px) contrast (30);
3. Let the flames move.
This step is more troublesome, but also very good understanding, is the use of the above mentioned fusion effect, so that many small circles randomly through the triangle can be, look at the following picture, you can understand the principle.
Well, it's definitely easy to understand the code.
Complete the Code
<!doctype html>
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