sfeng/ray-tracer-comp371
1
0
Fork 0
mirror of https://github.com/vonhyou/ray-tracer-comp371.git synced 2025-06-08 07:22:01 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

finish ray casting

Browse source
This commit is contained in:
Shuo Feng 2024-02-21 01:33:06 -05:00
parent bd99b001bb
commit 0633159427
Signed by: sfeng
GPG key ID: 1E83AE6CD1C037B1
2 changed files with 17 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

17
src/Geometry.cc
View file

@ -15,18 +15,29 @@ bool Sphere::intersect(const Ray &r) const {
return b * b - 4 * a * c >= 0;
}
bool isInRectangle(const Vector3f &p, const Vector3f &a, const Vector3f &b,
const Vector3f &c, const Vector3f &d, const Vector3f &n) {
float s1 = (b - a).cross(p - a).dot(n);
float s2 = (c - b).cross(p - b).dot(n);
float s3 = (d - c).cross(p - c).dot(n);
float s4 = (a - d).cross(p - d).dot(n);
return (s1 >= 0 && s2 >= 0 && s3 >= 0 && s4 >= 0) ||
(s1 <= 0 && s2 <= 0 && s3 <= 0 && s4 <= 0);
}
bool Rectangle::intersect(const Ray &r) const {
Vector3f normal = (p2 - p1).cross(p3 - p1).normalized();
float d = normal.dot(p1);
float denom = normal.dot(r.getDirection());
if (abs(denom) < 1e-6f)
return false;
float t = (normal.dot(r.getOrigin() - p1) - d) / denom;
float t = -normal.dot(r.getOrigin() - p1) / denom;
if (t <= 0)
return false;
Vector3f p = r.getOrigin() + t * r.getDirection();
return true;
return isInRectangle(p, p1, p2, p3, p4, normal);
}