Libs/Mesh/PreviewMeshQC/Intersect.h

Classes

	Name
struct	Ray
struct	Intersection
struct	Triangle
struct	Quad

Functions

	Name
bool	IntersectTriangle(const Ray & ray, const Triangle & tri, Intersection & q, bool evalNormal =true)
bool	IntersectQuad(const Ray & ray, const Quad & quad, Intersection & q)
bool	FastIntersectQuad(const Ray & ray, const Quad & quad, Intersection & q)

Functions Documentation

function IntersectTriangle

cpp bool IntersectTriangle( const Ray & ray, const Triangle & tri, Intersection & q, bool evalNormal =true )

function IntersectQuad

cpp bool IntersectQuad( const Ray & ray, const Quad & quad, Intersection & q )

function FastIntersectQuad

cpp bool FastIntersectQuad( const Ray & ray, const Quad & quad, Intersection & q )

Source code

```cpp

pragma once

include "math3d.h"

// tools for finding intersections struct Ray { vec3d origin; // origin of ray vec3d direction; // direction of ray (must be unit vector!) };

//----------------------------------------------------------------------------- struct Intersection { vec3d point; // point of intersection float r[2]; // natural coordinates int m_index; // index of item that was intersected (context dependent) int m_faceIndex; // index of face that was intersected (context dependent) };

//----------------------------------------------------------------------------- struct Triangle { vec3d r0; vec3d r1; vec3d r2; vec3d fn; // face normal };

//----------------------------------------------------------------------------- struct Quad { vec3d r0; vec3d r1; vec3d r2; vec3d r3; };

//----------------------------------------------------------------------------- // Find intersection of a ray with a triangle // To evaluate the normal automatically, set evalNormal to true. Otherwise, the normal in Triangle is used bool IntersectTriangle(const Ray& ray, const Triangle& tri, Intersection& q, bool evalNormal = true);

//----------------------------------------------------------------------------- // Find intersection of a ray with a quad bool IntersectQuad(const Ray& ray, const Quad& quad, Intersection& q); bool FastIntersectQuad(const Ray& ray, const Quad& quad, Intersection& q); ```

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Updated on 2026-03-31 at 16:02:11 +0000