Since we are using the triangle here, enable the auto-orient function to automatically guide the rotation of the triangle to its path. This creates an expression on the shape layer, where the brush position of the write-on effect is influenced by the position of the triangle, thereby achieving the stroke animation with the movement inside the shape. Once you have edited the write-on value from the effects panel, Alt/ option + click the brush position from the Effects panel and drag the pick-whip to its position, as shown below. You can now edit the stroke properties you want from the effects panel and change the write-on stroke colour, size, hardness, opacity, length and spacing. This will add the write-on effect on the shape layer. To do this, navigate to Effect > Generate > Write-On. Now select the shape layer and add the write-on effect. Creating Triangle Form Polygon Shape Tool Step 2: Adding the Effect I am using a triangle here, but you can use any side shape you want per your project requirement. Edit the radius and outer rounds of the triangles like you want. Navigate points under the poly-star path and change the value to 3 to create a triangle. To create a triangle, select the polygon tool from the toolbar panel and create an object. Then, create a shape layer and draw a triangle.
Now, in the composition, you must create a solid background layer first and assign the desired colour. You can use any size and time as per your need and application. I usually use square composition for loop projects. The steps in creating an automated write-on over a shape's position are as follows: Step 1: Setting Up CompositionĬreate a composition with desired size and time. There are many other tutorials on achieving this effect, but this one is a simpler version that achieves the same in the least amount of steps. In this blog, I would like to introduce you to a simple tutorial on creating automated write-on effects with changes in the shape's position.
#After effects expressions shape scale manual#
This helps you lessen the manual key-framing burden on a massive level to achieve the same effect. Recently, I have been obsessed with After Effects expression controls and automated animations. In After Effects, it is always smarter to use expressions over manual key-framing when two or more effects are involved.
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