public void GenerateNewMesh()
{
if (Density == 0.0f)
{
throw new System.Exception("Density is " + Density + " cannot create mesh");
}
// create mesh
PointMesh = new Mesh();
PointMesh.name = this.name;
Debug.Log("parsing " + Filename);
var Lines = System.IO.File.ReadAllLines(Filename);
var Positions = new List <Vector3> ();
var Normals = new List <Vector3> ();
var Colours = new List <Color> ();
bool BoundsInitialised = false;
Bounds MinMax = new Bounds();
// generate indicies
int VertexesPerTriangle = (GenerateAsPoints ? 1 : 3);
// decode points
{
var Pos3 = new Vector3();
var Colour3 = new Color();
var Space = new char[] { ' ' };
foreach (string Line in Lines)
{
try {
var Floats = Line.Split(Space);
Pos3.x = FastParse.Float(Floats [0]);
Pos3.y = FastParse.Float(Floats [1]);
Pos3.z = FastParse.Float(Floats [2]);
Colour3.r = FastParse.Float(Floats [3]) / 256.0f;
Colour3.g = FastParse.Float(Floats [4]) / 256.0f;
Colour3.b = FastParse.Float(Floats [5]) / 256.0f;
if (!BoundsInitialised)
{
MinMax = new Bounds(Pos3, Vector3.zero);
BoundsInitialised = true;
}
MinMax.Encapsulate(Pos3);
if (GenerateAsPoints)
{
Positions.Add(Pos3);
Colours.Add(Colour3);
Normals.Add(new Vector3(1, 0, 0));
}
else
{
Positions.Add(Pos3);
Colours.Add(Colour3);
Normals.Add(new Vector3(1, 0, 0));
Positions.Add(Pos3);
Colours.Add(Colour3);
Normals.Add(new Vector3(0, 1, 0));
Positions.Add(Pos3);
Colours.Add(Colour3);
Normals.Add(new Vector3(0, 0, 1));
}
}
catch (System.Exception e)
{
Debug.LogWarning("Exception with line: " + Line + ": " + e.Message);
}
}
}
// never added any verts
if (!BoundsInitialised)
{
throw new System.Exception("Failed to parse any points");
}
// center verts
if (CenterMesh)
{
var BoundsCenter = MinMax.center;
for (int i = 0; i < Positions.Count; i++)
{
Positions [i] -= BoundsCenter;
}
MinMax.min -= BoundsCenter;
MinMax.max -= BoundsCenter;
if (MoveSelf)
{
this.transform.localPosition = BoundsCenter;
}
}
// crop for density
if (Density < 1)
{
var OldCount = Positions.Count;
var Step = 1.0f / (1.0f - Density);
if (Step <= 1.0f)
{
throw new System.Exception("Step is too low " + Step);
}
if (GenerateAsPoints)
{
for (float i = Positions.Count - 1; i >= 0; i -= Step)
{
Positions.RemoveAt((int)i);
Normals.RemoveAt((int)i);
Colours.RemoveAt((int)i);
}
}
else
{
int TriangleCount = Positions.Count / 3;
for (float i = TriangleCount - 1; i >= 0; i -= Step)
{
var ti = (int)i * 3;
Positions.RemoveRange(ti, 3);
Normals.RemoveRange(ti, 3);
Colours.RemoveRange(ti, 3);
}
}
var NewDensity = Positions.Count / (float)OldCount;
Debug.Log("Reduced points from " + OldCount + " to " + Positions.Count + "(" + (Density * 100) + "% requested, produced " + (NewDensity * 100) + "%)");
}
// cap to the unity limit
var VertexLimit = 65535 - (GenerateAsPoints ? 1 : 3);
if (Positions.Count >= VertexLimit)
{
var Dropped = Positions.Count - VertexLimit;
Debug.LogWarning("capped point cloud to vertex limit of " + VertexLimit + " from " + Positions.Count + ". " + Dropped + " dropped");
Positions.RemoveRange(VertexLimit, Dropped);
Normals.RemoveRange(VertexLimit, Dropped);
Colours.RemoveRange(VertexLimit, Dropped);
}
// generate indicies
var Indexes = new int[Positions.Count];
for (int i = 0; i < Indexes.Length; i++)
{
Indexes [i] = i;
}
PointMesh.SetVertices(Positions);
PointMesh.SetNormals(Normals);
PointMesh.SetColors(Colours);
PointMesh.SetIndices(Indexes, GenerateAsPoints ? MeshTopology.Points : MeshTopology.Triangles, 0);
PointMesh.bounds = MinMax;
var mf = this.GetComponent <MeshFilter> ();
mf.mesh = PointMesh;
var mr = this.GetComponent <MeshRenderer> ();
var mat = ModifySharedMaterial ? mr.sharedMaterial : mr.material;
if (GenerateAsPoints)
{
mat.EnableKeyword(PointGeometryShaderFeature);
}
else
{
mat.DisableKeyword(PointGeometryShaderFeature);
}
if (UseVertexTriangulation)
{
mat.EnableKeyword(VertexTriangulationShaderFeature);
}
else
{
mat.DisableKeyword(VertexTriangulationShaderFeature);
}
var bc = this.GetComponent <BoxCollider> ();
if (bc != null)
{
bc.enabled = false;
bc.enabled = true;
}
}
