---
name: "rtcIntersectNM"
section: "3"
platform: "linux"
package: "libembree-dev"
version: "3.13.5+dfsg-2"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/rtcIntersectNM"
---

# rtcIntersectNM(3)

### NAME

-

  ```
  rtcIntersectNM - finds the closest hits for a stream of M
    ray packets of size N
  ```

### SYNOPSIS

-

  ```
  #include <embree3/rtcore.h>
  void rtcIntersectNM(
    RTCScene scene,
    struct RTCIntersectContext* context,
    struct RTCRayHitN* rayhit,
    unsigned int N,
    unsigned int M,
    size_t byteStride
  );
  ```

### DESCRIPTION

The `rtcIntersectNM` function finds the closest hits for a stream of `M` ray packets (`rayhit` argument) of size `N` with the scene (`scene` argument). The `rays` argument points to an array of ray and hit packets with specified byte stride (`byteStride` argument) between the ray/hit packets. See Section \[rtcIntersect1\] for a description of how to set up and trace rays.

-

  ```

  ```

-

  ```

  ```

A ray in a ray stream is considered inactive if its `tnear` value is larger than its `tfar` value.

The packet size `N` must be larger than 0, and the stream size `M` can be an arbitrary positive integer including 0. Each ray must be aligned to 16 bytes.

### EXIT STATUS

For performance reasons this function does not do any error checks, thus will not set any error flags on failure.

### SEE ALSO

\[rtcOccludedNM\]