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55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#include "EditorWhiteBoxComponentModeTypes.h"
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#include "WhiteBoxModifierUtil.h"
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#include <AzCore/std/sort.h>
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namespace WhiteBox
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{
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template<typename Intersection>
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static float IntersectionDistance(const AZStd::optional<Intersection>& intersection)
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{
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return intersection.has_value() ? intersection->m_intersection.m_closestDistance
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: std::numeric_limits<float>::max();
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}
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GeometryIntersection FindClosestGeometryIntersection(
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const AZStd::optional<EdgeIntersection>& edgeIntersection,
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const AZStd::optional<PolygonIntersection>& polygonIntersection,
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const AZStd::optional<VertexIntersection>& vertexIntersection)
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{
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if (!edgeIntersection.has_value() && !polygonIntersection.has_value() && !vertexIntersection.has_value())
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{
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return GeometryIntersection::None;
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}
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// simple wrapper type to help sort values
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struct IntersectionType
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{
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float m_distance;
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GeometryIntersection m_type;
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};
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AZStd::array<IntersectionType, 3> intersections{
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IntersectionType{IntersectionDistance(edgeIntersection), GeometryIntersection::Edge},
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IntersectionType{IntersectionDistance(polygonIntersection), GeometryIntersection::Polygon},
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IntersectionType{IntersectionDistance(vertexIntersection), GeometryIntersection::Vertex}};
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AZStd::sort(
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AZStd::begin(intersections), AZStd::end(intersections),
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[](const IntersectionType& lhs, const IntersectionType& rhs)
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{
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return lhs.m_distance < rhs.m_distance;
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});
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return intersections.front().m_type;
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}
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} // namespace WhiteBox
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