Let’s create a shape moire effect and automate it by using a first animation procedure.
The idea is to make a text path, scale it on the vertical axis and copy it below each other.
Create a Textpath node.
- Set Text to ABCD.
- Select a bold font.
- Set Size parameter to 120.00
Create a Transform node and connect textpath1 to it. Set Scale Y to 6.00 so you end up with an ugly stretched version of textpath1.
Create a Copy node. Connect transform1 to this node.
- Set Copies to 10.
- Set Translate Y to 12.00.
You should see this as a result:
Now we will create a pattern to use as a movable overlay over the above result.
Create a Rect node as a basic shape for the pattern.
- Set Width to 400.00.
- Set Height to 12.00 (which is the same amount as the value for translate Y parameter of copy1)
Create a Copy node and make 30 copies with a Translate Y parameter set to 13.00. Connect rect1 to this node.
In order to make it moveable create a Transform node and connect copy2 to it. We will change the value for Translate Y later.
Create a Merge node and connect copy1 to it. Do the same for transform2. Double click on merge1 to make it the rendered node.
Click once on transform2 and drag the Translate Y parameter. Cool..but can’t we automate it?
Animation asks for a few new things to be explained.
Parameters as we have seen before are editable by using their widgets. You can also make a dynamic variable by using expressions. One of the variables we can call for over an expression is FRAME (in capitals - system variables are all in CAPITALS), meaning it calls the number of the frame. Further is more information on expressions but let’s implement one now:
- Click on the transform2 node and look at the parameter pane. On the right of each parameter is a small arrow that is in fact a button.
- Click on it and select Toggle Expression. The look of the widget will change from the numberwidget to a textinput window.
- Enter -FRAME en press the enter key. We call for the negative of the frame because i want the group of rectangles to go up.
- On the lower left corner is the “Animation bar”. Click the Play button to see the animation.
You can save animation by going to the File tab » export Movie where you have a selection of possible formats. Enter a name for the animation and select the number of frames it has to export.
- Changing the order so the letters are printed upside down.
- Change the letters in to an svg using an Import node. The Eifeltower for instance (from Wikipedia)
- Change Text into an expression over Toggle Expression and enter int(FRAME/10.0) to see a counting procedure.