public void GenerateMesh()
{
if (!drawMesh)
{
meshFilter.sharedMesh = new Mesh();
return;
}
meshData = NoiseTreeMeshGenerator.GenerateMesh(trunkPoints, branches, detailVerts, trunkRadius, branchRadius, thinningRate);
meshFilter.sharedMesh = meshData.CreateMesh();
}
static void GenerateVertPoints(Branch branch, NoiseTreeMeshData meshData, Dictionary <Vector3, int[]> pointToVerts, int detailVerts, float branchRadius, float thinningRate, ref int vertexIndex)
{
float branchRad = branchRadius;
// Loop through points in the branch
for (int i = 1; i < branch.points.Count; i++)
{
int[] verticesToStore = new int[detailVerts];
Vector3 dir = branch.points[i] - branch.points[i - 1];
Vector3 tan = Vector3.zero, binormal = Vector3.zero;
Vector3.OrthoNormalize(ref dir, ref tan, ref binormal);
branchRad *= thinningRate / 100f;
// Generate verts for branch thickness at point i
for (int j = 0; j < detailVerts; j++)
{
if (i == branch.points.Count - 1)
{
meshData.vertices[vertexIndex] = branch.points[i];
}
else
{
Vector3 rotatedVector = RotateVector(dir, tan, binormal, j, detailVerts);
meshData.vertices[vertexIndex] = branch.points[i] + rotatedVector * branchRad;
}
verticesToStore[j] = vertexIndex++;
}
pointToVerts.Add(branch.points[i], verticesToStore);
// See if point splits and generate split branch
if (branch.branches.Count > 0)
{
for (int k = 0; k < branch.branches.Count; k++)
{
if (branch.branches[k].points[0] == branch.points[i])
{
GenerateVertPoints(branch.branches[k], meshData, pointToVerts, detailVerts, branchRad * thinningRate / 100f, thinningRate, ref vertexIndex);
break;
}
}
}
}
// Figuring out how to skillfully insert triangle generation in the loop to make branch is too hard so im just doing it after
// Will be redundant but will work
// Generate triangles for branch
for (int k = 1; k < branch.points.Count; k++)
{
int[] pt1Verts = pointToVerts[branch.points[k - 1]];
int[] pt2Verts = pointToVerts[branch.points[k]];
for (int w = 0; w < detailVerts; w++)
{
if (w < detailVerts - 1)
{
meshData.AddTriangle(pt1Verts[w], pt1Verts[w + 1], pt2Verts[w]);
meshData.AddTriangle(pt2Verts[w], pt1Verts[w + 1], pt2Verts[w + 1]);
}
else
{
meshData.AddTriangle(pt1Verts[detailVerts - 1], pt1Verts[0], pt2Verts[detailVerts - 1]);
meshData.AddTriangle(pt2Verts[detailVerts - 1], pt1Verts[0], pt2Verts[0]);
}
}
}
}
public static NoiseTreeMeshData GenerateMesh(TrunkPoint[] trunkPoints, List <Branch> branches, int detailVerts, float trunkRadius = 1f, float branchRadius = 1f, float thinningRate = 100f)
{
Dictionary <Vector3, int[]> pointToVerts = new Dictionary <Vector3, int[]>();
int segments = trunkPoints.Length - 1;
for (int q = 0; q < branches.Count; q++)
{
segments += branches[q].segmentCount;
}
NoiseTreeMeshData meshData = new NoiseTreeMeshData(segments, detailVerts);
int vertexIndex = 0;
// Calculate verts for trunk thickness
for (int i = 0; i < trunkPoints.Length; i++)
{
int[] verticesToStore = new int[detailVerts];
Vector3 dir = trunkPoints[i].dir;
Vector3 tan = Vector3.zero, binormal = Vector3.zero;
Vector3.OrthoNormalize(ref dir, ref tan, ref binormal);
for (int j = 0; j < detailVerts; j++)
{
if (i == trunkPoints.Length - 1)
{
meshData.vertices[vertexIndex] = trunkPoints[i].pos;
}
else // Collapse verts if its an end point
{
Vector3 rotatedVector = RotateVector(dir, tan, binormal, j, detailVerts);
meshData.vertices[vertexIndex] = trunkPoints[i].pos + rotatedVector * trunkRadius;
}
verticesToStore[j] = vertexIndex++;
}
pointToVerts.Add(trunkPoints[i].pos, verticesToStore);
// Generate Trianlges for trunk
if (i > 0) // Check to see if past first iteration
{
int[] pt1Verts = pointToVerts[trunkPoints[i - 1].pos];
for (int w = 0; w < detailVerts; w++)
{
if (w < detailVerts - 1)
{
meshData.AddTriangle(pt1Verts[w], pt1Verts[w + 1], vertexIndex - detailVerts + w);
meshData.AddTriangle(vertexIndex - detailVerts + w, pt1Verts[w + 1], vertexIndex - detailVerts + 1 + w);
}
else
{
meshData.AddTriangle(pt1Verts[detailVerts - 1], pt1Verts[0], vertexIndex - 1);
meshData.AddTriangle(vertexIndex - 1, pt1Verts[0], vertexIndex - detailVerts);
}
}
}
}
// Calculate verts for branch thickness
for (int k = 0; k < branches.Count; k++)
{
GenerateVertPoints(branches[k], meshData, pointToVerts, detailVerts, branchRadius, thinningRate, ref vertexIndex);
}
return(meshData);
}
public void ResetNoiseTree()
{
trunkPoints = new TrunkPoint[numTrunkPoints];
branches = new List <Branch>();
meshData = null;
}