private void Start()
{
if (static_mesh == null)
{
const float RADIUS = 1.2f;
const float YD = 0.015f;
float S = Mathf.Sqrt(3f) * 0.5f;
static_mesh = VelocityBooster.MakeLinesMesh(new List <Vector3>
{
RADIUS *new Vector3(1.0f, YD, 0),
RADIUS * new Vector3(0.5f, YD, S),
RADIUS * new Vector3(-0.5f, YD, S),
RADIUS * new Vector3(-1.0f, YD, 0),
RADIUS * new Vector3(-0.5f, YD, -S),
RADIUS * new Vector3(0.5f, YD, -S),
RADIUS * new Vector3(1.0f, -YD, 0),
RADIUS * new Vector3(0.5f, -YD, S),
RADIUS * new Vector3(-0.5f, -YD, S),
RADIUS * new Vector3(-1.0f, -YD, 0),
RADIUS * new Vector3(-0.5f, -YD, -S),
RADIUS * new Vector3(0.5f, -YD, -S),
},
new int[]
{
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 0,
6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 6,
});
}
}
Mesh GetVBMesh()
{
Mesh src_mesh = VelocityBoostCube() ? null : GetComponent <MeshFilter>().sharedMesh;
string name = src_mesh ? src_mesh.name : "cube";
if (!vb_static_meshes.TryGetValue(name, out Mesh mesh))
{
var vecs = new List <Vector3>();
var indices = new List <int>();
if (!src_mesh)
{
/* cube */
for (int dz = -1; dz <= 1; dz += 2)
{
for (int dy = -1; dy <= 1; dy += 2)
{
for (int dx = -1; dx <= 1; dx += 2)
{
vecs.Add(new Vector3(dx * 0.5f, dy * 0.5f, dz * 0.5f));
}
}
}
indices.AddRange(new int[] {
0, 1, 2, 3, 4, 5, 6, 7,
0, 2, 1, 3, 4, 6, 5, 7,
0, 4, 1, 5, 2, 6, 3, 7,
});
}
else
{
/* copy the underlying mesh's edges */
var vec2index = new Dictionary <Vector3Int, int>();
var seen_edge = new HashSet <System.Tuple <int, int> >();
int AddVec(Vector3 v)
{
Vector3Int key = Vector3Int.RoundToInt(v * 128f);
if (!vec2index.TryGetValue(key, out int i))
{
i = vecs.Count;
vecs.Add(v);
vec2index[key] = i;
}
return(i);
}
var src_vecs = src_mesh.vertices;
var src_indices = src_mesh.GetIndices(0);
for (int i = 0; i < src_indices.Length; i++)
{
int j = i + 1;
if ((j % 3) == 0)
{
j -= 3;
}
int ii = AddVec(src_vecs[src_indices[i]]);
int jj = AddVec(src_vecs[src_indices[j]]);
if (!seen_edge.Contains(System.Tuple.Create(ii, jj)) &&
!seen_edge.Contains(System.Tuple.Create(jj, ii)))
{
indices.Add(ii);
indices.Add(jj);
seen_edge.Add(System.Tuple.Create(jj, ii));
}
}
}
mesh = VelocityBooster.MakeLinesMesh(vecs, indices.ToArray());
vb_static_meshes[name] = mesh;
}
return(mesh);
}