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

0 vote124 views1 answer
C+ - Dormir en millisecondes
C++
0 vote103 views2 answers
Interface in c++
C++
0 vote135 views1 answer
String to decimal c++ strtol
C++
0 vote69 views1 answer
C++ code executio canntot proceed because glew32.dll was not founud
C++
0 vote125 views1 answer
Sfml keyboard events cpp
C++
7 votes105 views1 answer
How to make string get spaces c++
C++
2 votes150 views1 answer
++x vs x++
C++
0 vote108 views1 answer
Accpt array input in single line in cpp
C++
0 vote115 views1 answer
Empty 2d array as a member of a class class c++
C++
4 votes195 views1 answer
Arduino uno hello world
C++