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49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
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#pragma once
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#ifndef NV_MATH_PLANE_INL
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#define NV_MATH_PLANE_INL
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#include "Plane.h"
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#include "Vector.inl"
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namespace nv
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{
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inline Plane::Plane() {}
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inline Plane::Plane(float x, float y, float z, float w) : p(x, y, z, w) {}
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inline Plane::Plane(Vector4::Arg v) : p(v) {}
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inline Plane::Plane(Vector3::Arg v, float d) : p(v, d) {}
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inline Plane::Plane(Vector3::Arg normal, Vector3::Arg point) : p(normal, dot(normal, point)) {}
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inline const Plane & Plane::operator=(Plane::Arg v) { p = v.p; return *this; }
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inline Vector3 Plane::vector() const { return p.xyz(); }
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inline scalar Plane::offset() const { return p.w; }
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inline const Vector4 & Plane::asVector() const { return p; }
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inline Vector4 & Plane::asVector() { return p; }
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// Normalize plane.
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inline Plane normalize(Plane::Arg plane, float epsilon = NV_EPSILON)
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{
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const float len = length(plane.vector());
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nvDebugCheck(!isZero(len, epsilon));
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const float inv = 1.0f / len;
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return Plane(plane.asVector() * inv);
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}
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// Get the signed distance from the given point to this plane.
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inline float distance(Plane::Arg plane, Vector3::Arg point)
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{
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return dot(plane.vector(), point) - plane.offset();
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}
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inline void Plane::operator*=(scalar s)
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{
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scale(p, s);
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}
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} // nv namespace
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#endif // NV_MATH_PLANE_H
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