mirror of https://github.com/AxioDL/zeus.git
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
#pragma once
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#include <cassert>
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#include "zeus/CVector3f.hpp"
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#include "zeus/Global.hpp"
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#include "zeus/Math.hpp"
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namespace zeus {
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class CPlane {
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public:
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constexpr CPlane() : mSimd(1.f, 0.f, 0.f, 0.f) {}
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constexpr CPlane(float a, float b, float c, float d) : mSimd(a, b, c, d) {}
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CPlane(const CVector3f& a, const CVector3f& b, const CVector3f& c) {
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mSimd = (b - a).cross(c - a).normalized().mSimd;
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mSimd[3] = a.dot(normal());
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}
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CPlane(const CVector3f& point, float displacement) {
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mSimd = point.mSimd;
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mSimd[3] = displacement;
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}
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[[nodiscard]] float clipLineSegment(const CVector3f& a, const CVector3f& b) {
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const float mag = (b - a).dot(normal());
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const float dis = (-(y() - d())) / mag;
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return clamp(0.0f, dis, 1.0f);
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}
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void normalize() {
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float nd = d();
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auto norm = normal();
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float mag = norm.magnitude();
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mag = 1.f / mag;
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mSimd = (norm * mag).mSimd;
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mSimd[3] = nd * mag;
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}
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[[nodiscard]] float pointToPlaneDist(const CVector3f& pos) const { return normal().dot(pos) - d(); }
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[[nodiscard]] bool rayPlaneIntersection(const CVector3f& from, const CVector3f& to, CVector3f& point) const;
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[[nodiscard]] CVector3f normal() const { return mSimd; }
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[[nodiscard]] zeus::simd<float>::reference operator[](size_t idx) {
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assert(idx < 4);
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return mSimd[idx];
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}
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[[nodiscard]] float operator[](size_t idx) const {
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assert(idx < 4);
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return mSimd[idx];
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}
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[[nodiscard]] float x() const { return mSimd[0]; }
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[[nodiscard]] float y() const { return mSimd[1]; }
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[[nodiscard]] float z() const { return mSimd[2]; }
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[[nodiscard]] float d() const { return mSimd[3]; }
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[[nodiscard]] simd<float>::reference x() { return mSimd[0]; }
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[[nodiscard]] simd<float>::reference y() { return mSimd[1]; }
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[[nodiscard]] simd<float>::reference z() { return mSimd[2]; }
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[[nodiscard]] simd<float>::reference d() { return mSimd[3]; }
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zeus::simd<float> mSimd;
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};
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} // namespace zeus
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