rtcGetGeo...tHalfEdge(3)

💖 rtcGetGeometryNextHalfEdge — the next half edge, bestie 💖

okay so real quick, this page lives in the Embree Ray Tracing Kernels 3 manual, and it's literally about one tiny function that hands you the next half edge in a subdivision mesh. it's giving "small but mighty". let's go 🦋

✨ NAME ✨

rtcGetGeometryNextHalfEdge — returns the next half edge 👑

🌸 SYNOPSIS 🌸

#include <embree3/rtcore.h>

unsigned int rtcGetGeometryNextHalfEdge(
  RTCGeometry geometry,
  unsigned int edgeID
);

💅 DESCRIPTION 💅

so the rtcGetGeometryNextHalfEdge function returns the ID of the next half edge of the half edge you passed in (that's the edgeID argument, bestie). like, you give it an edge, it gives you the one that comes right after it. no cap.

for instance, in the following example the next half edge of e10 is e11. see? it's just the next one. periodt. ✨

lowkey important vibe check: this function can only be used for subdivision geometries. not every geometry, okay? just subdivision ones.

and because all topologies of a subdivision geometry share the same face buffer 🫶, this function does not depend on the topology ID. so you don't gotta pass one. iconic, honestly.

😭 EXIT STATUS 😭

on failure, an error code gets set, and you can go query it using rtcGetDeviceError. so if something's not giving, that's where you look. 💀

🔥 SEE ALSO 🔥

• [rtcGetGeometryFirstHalfEdge]
• [rtcGetGeometryFace]
• [rtcGetGeometryOppositeHalfEdge]
• [rtcGetGeometryNextHalfEdge]
• [rtcGetGeometryPreviousHalfEdge]

and that's the whole page, bestie!! 🎀 this one came straight out of the Embree Ray Tracing Kernels 3 manual — page rtcGetGeo...tHalfEdge(3), if we're being formal — so go forth and traverse those half edges. slay. 💜🧚‍♀️