Houdini Study Note (一）

对应文档为Houdini帮助：Expression cookbook章节

Ripples

To get ripples radiating from a center, base the sine function on the distance of the point to the center of the surface:

Position Y
sin(sqrt(($BBX-0.5)^2+($BBZ-0.5)^2)*1080)

To animate this, add a time-based variable to the expression:

sin(sqrt(($BBX-0.5)^2+($BBZ-0.5)^2)*720+$F*4)

Point节点中Position Y : sin(sqrt(($BBX-0.5)^2+($BBZ-0.5)^2)*1080-$F*4)*0.4

Logarithmic Spiral

This creates a logarithmic spiral, reminiscent of nautilus shells.

Position X
cos ($PT * 2) * $PT / 200 - 0.2
Position Y
sin ($PT * 2) * $PT / 200 + 0.2

时间： 2024-11-02 23:39:33

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