33 lines
814 B
C++
33 lines
814 B
C++
#include "first_hit.h"
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bool first_hit(
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const Ray & ray,
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const double min_t,
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const std::vector< std::shared_ptr<Object> > & objects,
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int & hit_id,
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double & t,
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Eigen::Vector3d & n)
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{
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bool hit = false;
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/* Initialize to a value that will never be used. */
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t = -1;
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/* Alternatively, use a max integer value, and remove the check t == -1. */
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/* Store intermediate results that are not necessarily the first hit. */
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double t_temp;
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Eigen::Vector3d n_temp;
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for (int i = 0; i < objects.size(); ++i) {
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if (objects[i]->intersect(ray, min_t, t_temp, n_temp)) {
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hit = true;
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if (t == -1 || t_temp < t) {
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hit_id = i;
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t = t_temp;
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n = n_temp;
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}
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}
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}
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return hit;
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}
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