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31 lines
914 B
C
31 lines
914 B
C
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#ifndef SPHERE_H
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#define SPHERE_H
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#include "Vector3.h"
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class Sphere {
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public:
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Vector3 center;
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double radius;
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Vector3 color;
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Sphere(const Vector3& c, double r, const Vector3& col)
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: center(c), radius(r), color(col) {}
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bool intersect(const Vector3& ray_origin, const Vector3& ray_direction, double& t, Vector3& hit_point, Vector3& normal) const {
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Vector3 oc = ray_origin - center;
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double a = ray_direction.dot(ray_direction);
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double b = 2.0 * oc.dot(ray_direction);
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double c = oc.dot(oc) - radius * radius;
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double discriminant = b * b - 4 * a * c;
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if (discriminant > 0) {
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t = (-b - std::sqrt(discriminant)) / (2.0 * a);
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hit_point = ray_origin + ray_direction * t;
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normal = (hit_point - center).normalize();
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return true;
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}
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return false;
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}
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};
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#endif // SPHERE_H
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