72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
|
|
// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
#include <Jolt/Jolt.h>
|
|
|
|
#include <Jolt/Math/Vec3.h>
|
|
|
|
JPH_NAMESPACE_BEGIN
|
|
|
|
static void sAddVertex(StaticArray<Vec3, 1026> &ioVertices, Vec3Arg inVertex)
|
|
{
|
|
bool found = false;
|
|
for (const Vec3 &v : ioVertices)
|
|
if (v == inVertex)
|
|
{
|
|
found = true;
|
|
break;
|
|
}
|
|
if (!found)
|
|
ioVertices.push_back(inVertex);
|
|
}
|
|
|
|
static void sCreateVertices(StaticArray<Vec3, 1026> &ioVertices, Vec3Arg inDir1, Vec3Arg inDir2, Vec3Arg inDir3, int inLevel)
|
|
{
|
|
Vec3 center1 = (inDir1 + inDir2).Normalized();
|
|
Vec3 center2 = (inDir2 + inDir3).Normalized();
|
|
Vec3 center3 = (inDir3 + inDir1).Normalized();
|
|
|
|
sAddVertex(ioVertices, center1);
|
|
sAddVertex(ioVertices, center2);
|
|
sAddVertex(ioVertices, center3);
|
|
|
|
if (inLevel > 0)
|
|
{
|
|
int new_level = inLevel - 1;
|
|
sCreateVertices(ioVertices, inDir1, center1, center3, new_level);
|
|
sCreateVertices(ioVertices, center1, center2, center3, new_level);
|
|
sCreateVertices(ioVertices, center1, inDir2, center2, new_level);
|
|
sCreateVertices(ioVertices, center3, center2, inDir3, new_level);
|
|
}
|
|
}
|
|
|
|
const StaticArray<Vec3, 1026> Vec3::sUnitSphere = []() {
|
|
|
|
const int level = 3;
|
|
|
|
StaticArray<Vec3, 1026> verts;
|
|
|
|
// Add unit axis
|
|
verts.push_back(Vec3::sAxisX());
|
|
verts.push_back(-Vec3::sAxisX());
|
|
verts.push_back(Vec3::sAxisY());
|
|
verts.push_back(-Vec3::sAxisY());
|
|
verts.push_back(Vec3::sAxisZ());
|
|
verts.push_back(-Vec3::sAxisZ());
|
|
|
|
// Subdivide
|
|
sCreateVertices(verts, Vec3::sAxisX(), Vec3::sAxisY(), Vec3::sAxisZ(), level);
|
|
sCreateVertices(verts, -Vec3::sAxisX(), Vec3::sAxisY(), Vec3::sAxisZ(), level);
|
|
sCreateVertices(verts, Vec3::sAxisX(), -Vec3::sAxisY(), Vec3::sAxisZ(), level);
|
|
sCreateVertices(verts, -Vec3::sAxisX(), -Vec3::sAxisY(), Vec3::sAxisZ(), level);
|
|
sCreateVertices(verts, Vec3::sAxisX(), Vec3::sAxisY(), -Vec3::sAxisZ(), level);
|
|
sCreateVertices(verts, -Vec3::sAxisX(), Vec3::sAxisY(), -Vec3::sAxisZ(), level);
|
|
sCreateVertices(verts, Vec3::sAxisX(), -Vec3::sAxisY(), -Vec3::sAxisZ(), level);
|
|
sCreateVertices(verts, -Vec3::sAxisX(), -Vec3::sAxisY(), -Vec3::sAxisZ(), level);
|
|
|
|
return verts;
|
|
}();
|
|
|
|
JPH_NAMESPACE_END
|