Justin Marshall
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
#pragma once
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#include "idlib/math/vector.h"
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#include <cassert>
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#include <cmath>
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class idPlane {
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public:
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float a;
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float b;
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float c;
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float d;
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idPlane() = default;
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idPlane(const float newA, const float newB, const float newC, const float newD)
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: a(newA), b(newB), c(newC), d(newD) {}
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idPlane(const idVec3& normal, const float distance)
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: a(normal.x), b(normal.y), c(normal.z), d(-distance) {}
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float operator[](const int index) const {
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assert(index >= 0 && index < 4); return (&a)[index];
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}
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float& operator[](const int index) {
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assert(index >= 0 && index < 4); return (&a)[index];
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}
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idPlane operator-() const { return idPlane(-a, -b, -c, -d); }
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idVec3& Normal() { return *reinterpret_cast<idVec3*>(&a); }
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const idVec3& Normal() const { return *reinterpret_cast<const idVec3*>(&a); }
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float Dist() const { return -d; }
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void SetDist(const float distance) { d = -distance; }
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float Distance(const idVec3& point) const {
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return a * point.x + b * point.y + c * point.z + d;
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}
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bool Compare(const idPlane& other, const float normalEpsilon,
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const float distanceEpsilon) const {
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return std::fabs(a - other.a) <= normalEpsilon
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&& std::fabs(b - other.b) <= normalEpsilon
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&& std::fabs(c - other.c) <= normalEpsilon
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&& std::fabs(d - other.d) <= distanceEpsilon;
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}
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int GetDimension() const { return 4; }
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const float* ToFloatPtr() const { return &a; }
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float* ToFloatPtr() { return &a; }
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};
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static_assert(sizeof(idPlane) == 16, "Recovered idPlane ABI changed");
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