60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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#include <Jolt/Jolt.h>
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#include <Jolt/Core/UnorderedSet.h>
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#include <Jolt/Math/Vec3.h>
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JPH_NAMESPACE_BEGIN
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static void sCreateVertices(std::unordered_set<Vec3> &ioVertices, Vec3Arg inDir1, Vec3Arg inDir2, Vec3Arg inDir3, int inLevel)
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{
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Vec3 center1 = (inDir1 + inDir2).Normalized();
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Vec3 center2 = (inDir2 + inDir3).Normalized();
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Vec3 center3 = (inDir3 + inDir1).Normalized();
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ioVertices.insert(center1);
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ioVertices.insert(center2);
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ioVertices.insert(center3);
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if (inLevel > 0)
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{
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int new_level = inLevel - 1;
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sCreateVertices(ioVertices, inDir1, center1, center3, new_level);
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sCreateVertices(ioVertices, center1, center2, center3, new_level);
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sCreateVertices(ioVertices, center1, inDir2, center2, new_level);
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sCreateVertices(ioVertices, center3, center2, inDir3, new_level);
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}
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}
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const std::vector<Vec3> Vec3::sUnitSphere = []() {
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const int level = 3;
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std::unordered_set<Vec3> verts;
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// Add unit axis
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verts.insert(Vec3::sAxisX());
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verts.insert(-Vec3::sAxisX());
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verts.insert(Vec3::sAxisY());
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verts.insert(-Vec3::sAxisY());
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verts.insert(Vec3::sAxisZ());
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verts.insert(-Vec3::sAxisZ());
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// Subdivide
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sCreateVertices(verts, Vec3::sAxisX(), Vec3::sAxisY(), Vec3::sAxisZ(), level);
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sCreateVertices(verts, -Vec3::sAxisX(), Vec3::sAxisY(), Vec3::sAxisZ(), level);
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sCreateVertices(verts, Vec3::sAxisX(), -Vec3::sAxisY(), Vec3::sAxisZ(), level);
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sCreateVertices(verts, -Vec3::sAxisX(), -Vec3::sAxisY(), Vec3::sAxisZ(), level);
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sCreateVertices(verts, Vec3::sAxisX(), Vec3::sAxisY(), -Vec3::sAxisZ(), level);
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sCreateVertices(verts, -Vec3::sAxisX(), Vec3::sAxisY(), -Vec3::sAxisZ(), level);
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sCreateVertices(verts, Vec3::sAxisX(), -Vec3::sAxisY(), -Vec3::sAxisZ(), level);
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sCreateVertices(verts, -Vec3::sAxisX(), -Vec3::sAxisY(), -Vec3::sAxisZ(), level);
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return std::vector<Vec3>(verts.begin(), verts.end());
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}();
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JPH_NAMESPACE_END
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