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I have a text object that i want to reveal with a kind of handwriting effect. My plan is to animate an extruded curve which i want to use as a boolean operator on my original object.

Animated extruded curve

How can the animated mesh (blue) be exported or converted so i can use it later on the red text? Right now i cannot select the blue mesh as an operand in the boolean operator.

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The blue mesh isn't a real mesh it is generated from a curve so it can't be used in the Boolean modifier ( and other mesh dependent modifiers ) , also the text object( red one ) is a curve so it can't be used in the Boolean modifier.

You can convert the curve into a mesh :
- select the curve and hit Alt+C and choose Mesh from Curve
Note: beware after converting to a mesh you loose the curve editing options ( including this animation )

The animation you have can be replicated using the build modifier on the converted mesh :

enter image description here

now you can have both the animation and the Boolean modifier on this mesh

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  • $\begingroup$ The build modifier produces unpredictable results and the resulting mesh causes "Cannot exectue boolean operation". Even with removed double vertices and fixed normals. $\endgroup$ – dequid Apr 20 '15 at 12:24
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    $\begingroup$ @dequid the build modifier follows the vertices order ( which created first ) , for the boolean modifier see this answer $\endgroup$ – Chebhou Apr 20 '15 at 12:33
  • $\begingroup$ yes, and that vertex order is my problem. If i check fill caps, the polygons on the caps are builded first in the build modifier. As i understand, i need a closed mesh for the boolean modifier to work properly. Any ideas? $\endgroup$ – dequid Apr 20 '15 at 21:01
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    $\begingroup$ here is the example file if that's what you need i'll edit the answer to include it $\endgroup$ – Chebhou Apr 21 '15 at 10:09
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    $\begingroup$ @dequid here is another file see if it does it, I had to reverse the animation and change the shaders order $\endgroup$ – Chebhou Apr 23 '15 at 3:15

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