Houdini VEX：测量函数

• vector relbbox(<geometry>geometry, vector position)
• vector relbbox(<geometry>geometry, string primgroup, vector position)
• vector relbbox(vector position)

distance()

@Cd = relbbox(geoself(), @P);

• vector getbbox_size(<geometry>geometry)
• vector getbbox_size(<geometry>geometry, string primgroup)

vector size = getbbox_size(geoself());
printf("%g", size);