public static Mesh BuildMesh(Vector3 startingPoint, float radius, int iterations, Color vertexColor)
{
//x = r cos(v) cos(u)
//y = r cos(v) sin(u) u = [0, 2 * Pi)
//z = r sin(v) v = [-Pi / 2, Pi / 2]
Vector3[,] coordMatrix = new Vector3[iterations + 1, iterations + 1];
List <Vector3> coords = new List <Vector3>();
for (int v = 0; v <= iterations; v++)
{
for (int u = 0; u <= iterations; u++)
{
float ucoord = (float)u / (float)iterations * (2f * Mathf.PI);
float vcoord = (float)v / (float)iterations * (Mathf.PI) - (Mathf.PI / 2f);
float x = radius * Mathf.Cos(vcoord) * Mathf.Cos(ucoord);
float y = radius * Mathf.Cos(vcoord) * Mathf.Sin(ucoord);
float z = radius * Mathf.Sin(vcoord);
Vector3 coord = new Vector3(x, y, z) + startingPoint;
coords.Add(coord);
coordMatrix[u, v] = coord;
}
}
//lines.positionCount = coords.Count;
//lines.SetPositions(coords.ToArray());
int triangleIndex = 0;
List <Quad> qlist = new List <Quad>();
for (int v = 0; v < iterations; v++)
{
for (int u = 0; u < iterations; u++)
{
qlist.Add(Quad.Build(coordMatrix[u, v], coordMatrix[u + 1, v], coordMatrix[u, v + 1], coordMatrix[u + 1, v + 1], vertexColor, triangleIndex, true));
triangleIndex += 4;
}
}
Vector3[] verts = new Vector3[qlist.Count * 4];
Vector3[] norms = new Vector3[qlist.Count * 4];
Color[] colors = new Color[qlist.Count * 4];
int[] tris = new int[qlist.Count * 6];
for (int z = 0; z < qlist.Count; z++)
{
qlist[z].Vertices.CopyTo(verts, z * 4);
qlist[z].Normals.CopyTo(norms, z * 4);
qlist[z].Colors.CopyTo(colors, z * 4);
qlist[z].TriangleIndices.CopyTo(tris, z * 6);
}
Mesh m = new Mesh();
m.vertices = verts;
m.normals = norms;
m.colors = colors;
m.triangles = tris;
m.RecalculateNormals();
m.RecalculateTangents();
return(m);
}
public static Mesh BuildMesh(Vector3 startingPoint, Vector3 endingPoint, float radiusStart, float radiusEnd, Color vertexColor, Vector3 angleRotation, int capSegments, bool capEnds)
{
if (startingPoint.y == 0f)
{
startingPoint = new Vector3(startingPoint.x, 0.01f, startingPoint.z);
}
/*
* if (endingPoint.y == 0f)
* {
* startingPoint = new Vector3(endingPoint.x, 0.01f, endingPoint.z);
* }
*/
float aMinus = startingPoint.x;
Vector3 delta = new Vector3(aMinus, 0f, 0f);
Vector3 direction = endingPoint - startingPoint;
Vector3 startShifted = (startingPoint - delta).normalized;
if (startShifted == Vector3.zero)
{
startShifted = new Vector3(0.0f, 1.0f, 0.0f);
}
Vector3 ndir = direction.normalized;
Vector3 rotation = angleRotation;
List <Vector3[]> vertices = new List <Vector3[]>();
for (int z = 0; z < capSegments; z++)
{
double pct = (double)z / (double)capSegments * 360.0f;
Vector3 angle1 = new Vector3(angleRotation.x + (float)pct, angleRotation.y, angleRotation.z);
Quaternion a1 = Quaternion.Euler(angle1);
Quaternion rot1 = (Quaternion.LookRotation(ndir) * a1);
Vector3 new1 = rot1 * (startShifted * radiusStart) + startingPoint;
Vector3 new2 = rot1 * (startShifted * radiusEnd) + endingPoint;
vertices.Add(new Vector3[] { new1, new2 });
}
List <Quad> qlist = new List <Quad>();
int tindex = 0;
for (int z = 1; z <= capSegments; z++)
{
if (z == capSegments)
{
qlist.Add(Quad.Build(vertices[0][0], vertices[0][1], vertices[z - 1][0], vertices[z - 1][1], vertexColor, tindex));
if (capEnds)
{
tindex += 4;
qlist.Add(Quad.Build(startingPoint, vertices[0][0], startingPoint, vertices[z - 1][0], vertexColor, tindex));
tindex += 4;
qlist.Add(Quad.Build(vertices[0][1], endingPoint, vertices[z - 1][1], endingPoint, vertexColor, tindex));
}
}
else
{
qlist.Add(Quad.Build(vertices[z][0], vertices[z][1], vertices[z - 1][0], vertices[z - 1][1], vertexColor, tindex));
if (capEnds)
{
tindex += 4;
qlist.Add(Quad.Build(startingPoint, vertices[z][0], startingPoint, vertices[z - 1][0], vertexColor, tindex));
tindex += 4;
qlist.Add(Quad.Build(vertices[z][1], endingPoint, vertices[z - 1][1], endingPoint, vertexColor, tindex));
}
}
tindex += 4;
}
Vector3[] verts = new Vector3[qlist.Count * 4];
Vector3[] norms = new Vector3[qlist.Count * 4];
Color[] colors = new Color[qlist.Count * 4];
int[] tris = new int[qlist.Count * 6];
for (int z = 0; z < qlist.Count; z++)
{
qlist[z].Vertices.CopyTo(verts, z * 4);
qlist[z].Normals.CopyTo(norms, z * 4);
qlist[z].Colors.CopyTo(colors, z * 4);
qlist[z].TriangleIndices.CopyTo(tris, z * 6);
}
/*
* lineRenderer.positionCount = verts.Length;
* lineRenderer.SetPositions(verts);
*/
Mesh m = new Mesh();
m.vertices = verts;
m.normals = norms;
m.colors = colors;
m.triangles = tris;
m.RecalculateNormals();
m.RecalculateTangents();
return(m);
}