void Start()
{
m_particles = new Particle[numSegments];
m_constraints = new StretchConstraint[numSegments - 1];
float restLength = 0.25f;
for (int i = 0; i < numSegments; i++)
{
m_particles[i].m = 1f;
m_particles[i].x = transform.position + new Vector3(restLength * i, 0);
if (i < numSegments - 1)
{
StretchConstraint s = new StretchConstraint();
s.d = restLength;
s.x1 = i;
s.x2 = i + 1;
m_constraints[i] = s;
}
}
m_particles[0].m = 0;
}
void Start()
{
m_meshFilter = GetComponent <MeshFilter>();
if (!m_meshFilter)
{
Debug.LogError("No MeshFilter!");
return;
}
m_mesh = m_meshFilter.mesh;
if (!m_mesh)
{
Debug.LogError("No Mesh!");
return;
}
m_centerOfMass = new Vector2();
Vector3[] vertices = m_mesh.vertices;
m_particles = new Particle[vertices.Length];
for (int i = 0; i < vertices.Length; i++)
{
Vector2 pos = m_meshFilter.transform.TransformPoint(vertices[i]);
m_particles[i].x = pos;
m_particles[i].v = Vector2.zero;
m_particles[i].m = 1f;
m_centerOfMass += pos;
}
m_centerOfMass /= m_particles.Length;
for (int i = 0; i < m_particles.Length; i++)
{
m_particles[i].q = m_particles[i].x - m_centerOfMass;
}
//m_particles[0].m = 0;
int[] triangles = m_mesh.triangles;
float d = Vector3.Magnitude(m_meshFilter.transform.TransformPoint(vertices[0]) - m_meshFilter.transform.TransformPoint(vertices[1]));
HashSet <StretchConstraint> set = new HashSet <StretchConstraint>();
for (int i = 0; i < triangles.Length; i += 3)
{
StretchConstraint s = new StretchConstraint();
s.x1 = Mathf.Min(triangles[i], triangles[i + 1]);
s.x2 = Mathf.Max(triangles[i], triangles[i + 1]);
s.d = Vector3.Magnitude(m_meshFilter.transform.TransformPoint(vertices[triangles[i]]) -
m_meshFilter.transform.TransformPoint(vertices[triangles[i + 1]]));
set.Add(s);
StretchConstraint s1 = new StretchConstraint();
s1.x1 = Mathf.Min(triangles[i], triangles[i + 2]);
s1.x2 = Mathf.Max(triangles[i], triangles[i + 2]);
s1.d = Vector3.Magnitude(m_meshFilter.transform.TransformPoint(vertices[triangles[i]]) -
m_meshFilter.transform.TransformPoint(vertices[triangles[i + 2]]));;
set.Add(s1);
StretchConstraint s2 = new StretchConstraint();
s2.x1 = Mathf.Min(triangles[i + 1], triangles[i + 2]);
s2.x2 = Mathf.Max(triangles[i + 1], triangles[i + 2]);
s2.d = Vector3.Magnitude(m_meshFilter.transform.TransformPoint(vertices[triangles[i + 1]]) -
m_meshFilter.transform.TransformPoint(vertices[triangles[i + 2]]));;
set.Add(s2);
}
m_constraints = new StretchConstraint[set.Count];
set.CopyTo(m_constraints);
}