Lucas de Vries
34 lines
820 B
C++
34 lines
820 B
C++
#pragma once
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#include "vec3.h"
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template<class T>
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struct plane {
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vec3<T> dir;
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T dist;
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plane() : dist(0) {}
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plane(const vec3<T>& direction, T distance) : dir(direction), dist(distance) {
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}
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plane(const vec3<T>& point, const vec3<T>& direction) : dir(direction), dist((T)point.dot(direction)) {
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}
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//Creates a plane from a triangle specified in clockwise order (looking at the plane)
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plane(const vec3<T>& vertA, const vec3<T>& vertB, const vec3<T>& vertC) {
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vec3<T> legOne = vertA - vertB, legTwo = vertC - vertB;
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dir = legOne.cross(legTwo).normalized();
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dist = (T)dir.dot(vertA);
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}
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double distanceFromPlane(const vec3<T>& point) const {
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return dir.dot(point) - dist;
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}
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bool pointInFront(const vec3<T>& point) const {
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return distanceFromPlane(point) >= 0.0;
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}
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};
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typedef plane<double> planed; |