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marauder2k7 2026-05-17 17:34:15 +01:00
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Engine/lib/JoltPhysics/Samples/Utils/ShapeCreator.cpp Normal file
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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
// SPDX-FileCopyrightText: 2022 Jorrit Rouwe
// SPDX-License-Identifier: MIT
#include <TestFramework.h>
#include <Utils/ShapeCreator.h>
namespace ShapeCreator {
ShapeRefC CreateTorusMesh(float inTorusRadius, float inTubeRadius, uint inTorusSegments, uint inTubeSegments)
{
uint cNumVertices = inTorusSegments * inTubeSegments;
// Create torus
MeshShapeSettings mesh;
mesh.mTriangleVertices.reserve(cNumVertices);
mesh.mIndexedTriangles.reserve(cNumVertices * 2);
for (uint torus_segment = 0; torus_segment < inTorusSegments; ++torus_segment)
{
Mat44 rotation = Mat44::sRotation(Vec3::sAxisY(), float(torus_segment) * 2.0f * JPH_PI / inTorusSegments);
for (uint tube_segment = 0; tube_segment < inTubeSegments; ++tube_segment)
{
// Create vertices
float tube_angle = float(tube_segment) * 2.0f * JPH_PI / inTubeSegments;
Vec3 pos = rotation * Vec3(inTorusRadius + inTubeRadius * Sin(tube_angle), inTubeRadius * Cos(tube_angle), 0);
Float3 v;
pos.StoreFloat3(&v);
mesh.mTriangleVertices.push_back(v);
// Create indices
uint start_idx = torus_segment * inTubeSegments + tube_segment;
mesh.mIndexedTriangles.emplace_back(start_idx, (start_idx + 1) % cNumVertices, (start_idx + inTubeSegments) % cNumVertices);
mesh.mIndexedTriangles.emplace_back((start_idx + 1) % cNumVertices, (start_idx + inTubeSegments + 1) % cNumVertices, (start_idx + inTubeSegments) % cNumVertices);
}
}
return mesh.Create().Get();
}
};