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#include <godot_cpp/variant/plane.hpp>
#include <godot_cpp/variant/string.hpp>
namespace godot {
void Plane::set_normal(const Vector3 &p_normal) {
normal = p_normal;
}
void Plane::normalize() {
real_t l = normal.length();
if (l == 0) {
*this = Plane(0, 0, 0, 0);
return;
}
normal /= l;
d /= l;
}
Plane Plane::normalized() const {
Plane p = *this;
p.normalize();
return p;
}
Vector3 Plane::get_any_perpendicular_normal() const {
static const Vector3 p1 = Vector3(1, 0, 0);
static const Vector3 p2 = Vector3(0, 1, 0);
Vector3 p;
if (Math::abs(normal.dot(p1)) > 0.99) { // if too similar to p1
p = p2; // use p2
} else {
p = p1; // use p1
}
p -= normal * normal.dot(p);
p.normalize();
return p;
}
/* intersections */
bool Plane::intersect_3(const Plane &p_plane1, const Plane &p_plane2, Vector3 *r_result) const {
const Plane &p_plane0 = *this;
Vector3 normal0 = p_plane0.normal;
Vector3 normal1 = p_plane1.normal;
Vector3 normal2 = p_plane2.normal;
real_t denom = vec3_cross(normal0, normal1).dot(normal2);
if (Math::is_zero_approx(denom)) {
return false;
}
if (r_result) {
*r_result = ((vec3_cross(normal1, normal2) * p_plane0.d) +
(vec3_cross(normal2, normal0) * p_plane1.d) +
(vec3_cross(normal0, normal1) * p_plane2.d)) /
denom;
}
return true;
}
bool Plane::intersects_ray(const Vector3 &p_from, const Vector3 &p_dir, Vector3 *p_intersection) const {
Vector3 segment = p_dir;
real_t den = normal.dot(segment);
//printf("den is %i\n",den);
if (Math::is_zero_approx(den)) {
return false;
}
real_t dist = (normal.dot(p_from) - d) / den;
//printf("dist is %i\n",dist);
if (dist > CMP_EPSILON) { //this is a ray, before the emitting pos (p_from) doesn't exist
return false;
}
dist = -dist;
*p_intersection = p_from + segment * dist;
return true;
}
bool Plane::intersects_segment(const Vector3 &p_begin, const Vector3 &p_end, Vector3 *p_intersection) const {
Vector3 segment = p_begin - p_end;
real_t den = normal.dot(segment);
//printf("den is %i\n",den);
if (Math::is_zero_approx(den)) {
return false;
}
real_t dist = (normal.dot(p_begin) - d) / den;
//printf("dist is %i\n",dist);
if (dist < -CMP_EPSILON || dist > (1.0 + CMP_EPSILON)) {
return false;
}
dist = -dist;
*p_intersection = p_begin + segment * dist;
return true;
}
/* misc */
bool Plane::is_equal_approx_any_side(const Plane &p_plane) const {
return (normal.is_equal_approx(p_plane.normal) && Math::is_equal_approx(d, p_plane.d)) || (normal.is_equal_approx(-p_plane.normal) && Math::is_equal_approx(d, -p_plane.d));
}
bool Plane::is_equal_approx(const Plane &p_plane) const {
return normal.is_equal_approx(p_plane.normal) && Math::is_equal_approx(d, p_plane.d);
}
Plane::operator String() const {
return normal.operator String() + ", " + String::num(d,3);
}
} // namespace godot
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