oat Posted November 14, 2015 Share Posted November 14, 2015 [original post on Houdini forum which receives no reply yet ..]: https://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=42365 I want animate a group of points moving from their original positions based on the vector and velocity values embedded for each of them.However, I have the following problems:1. there is always a point at the original position which I don't want.2. each point will stop after moving for certain distance even if I used a delete node to "kill" it based on its life span.I'd appreciate your suggestions to solve this two problems!Thank you! pts_animation_345.zip Quote Link to comment Share on other sites More sharing options...
pezetko Posted November 14, 2015 Share Posted November 14, 2015 I cannot open that bgeo file at my notebook, it freezes the houdini. That extra point could be particle system primitive representation in the viewport. You can use Delete SOP to remove it after old popnet. But in H15.0.244.16 I don't see any extra point. That $LIFE variable in the Delete didn't work because you had Delete set to primitive type and that LIFE variable didn't existed (only life attribute existed). I added Attribute Create SOP that maps this attribute from the simulation to the variable. What you had in the scene is quite old workflow, you should look at the Houdini 13 Particles masterclass. pts_animation_345_a.hipnc Quote Link to comment Share on other sites More sharing options...
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