Ray sphere intersection equation

bool hit_sphere(const vec3& center, float radius, const ray& r){
    vec3 oc = r.origin() - center;
    float a = dot(r.direction(), r.direction());
    float b = 2.0 * dot(oc, r.direction());
    float c = dot(oc,oc) - radius*radius;
    float discriminant = b*b - 4*a*c;
    return (discriminant>0);
}

Source: viclw17.github.io

Similar codes

2 votes265 views1 answer
Allocation an array with new cpp
C++
0 vote290 views1 answer
C++ string erase all occurrences
C++
1 vote279 views1 answer
Print linked list recursively c++
C++
2 votes293 views1 answer
Built in function in c++ for binary to decimal
C++
0 vote269 views1 answer
Types of Triangles Based on Angles in c++
C++
0 vote296 views1 answer
HackerEarth questions Siemens
C++
1 vote260 views3 answers
C++ console color some digits
C++
0 vote270 views1 answer
Remove something from stringstream
C++
0 vote280 views1 answer
Glew32.dll was not found
C++
0 vote297 views1 answer
Gfgdf
C++