public static List <int> findBorderVerts(List <List <int> > triList, Dictionary <int, BiomeType> vertBiomes, Mesh mesh, BiomeType targetBiome, BiomeType secondTargetBiome)
{
List <int> borderVerts = new List <int>();
for (int i = 0; i < mesh.vertices.Length; i++)
{
if (MeshSearching.findVertIndexOfAdjenctVerts(mesh, i, triList, vertBiomes, targetBiome, secondTargetBiome))
{
borderVerts.Add(i);
}
}
return(borderVerts);
}
public void MakeMesh(int xOffSet, int yOffSet)
{
//enumerator to conver triangles to array interface for indexing
IEnumerator <TriangleNet.Topology.Triangle> triangleEnumerator = mesh.Triangles.GetEnumerator();
// create more than one chunk if necessary
for (int chunkStart = 0; chunkStart < mesh.Triangles.Count; chunkStart += trianglesInChunk)
{
// vertices in unity mesh
List <Vector3> vertices = new List <Vector3>();
//per-vertex normals
List <Vector3> normals = new List <Vector3>();
//per-vertex uvs
List <Vector2> uvs = new List <Vector2>();
// triangles
List <int> triangles = new List <int>();
// triangles custom stored in a way I can search to find which verts are part
List <List <int> > trisList = new List <List <int> >();
//vertex colours
List <Color> vertColors = new List <Color>();
#region convert triangle.Net mesh into Unity Mesh
//iterate over all triangles until chunk size
int chunkEnd = chunkStart + trianglesInChunk;
for (int i = chunkStart; i < chunkEnd; i++)
{
if (!triangleEnumerator.MoveNext())
{
// last triangle
break;
}
// get current triangle
Triangle triangle = triangleEnumerator.Current;
// triangles need to be wound backwards to be rightways up
Vector3 v0 = HelperFunctions.GetPoint3D(triangle.vertices[2].id, mesh, elevations);
Vector3 v1 = HelperFunctions.GetPoint3D(triangle.vertices[1].id, mesh, elevations);
Vector3 v2 = HelperFunctions.GetPoint3D(triangle.vertices[0].id, mesh, elevations);
triangles.Add(vertices.Count);
triangles.Add(vertices.Count + 1);
triangles.Add(vertices.Count + 2);
vertices.Add(v0);
vertices.Add(v1);
vertices.Add(v2);
vertColors.Add(HelperFunctions.getVertColour(v0, maxMeshHeight));
vertColors.Add(HelperFunctions.getVertColour(v1, maxMeshHeight));
vertColors.Add(HelperFunctions.getVertColour(v2, maxMeshHeight));
//custom data structure which will be used later to find adjanced vertices
List <int> thisTri = new List <int>();
thisTri.Add(vertices.Count);
thisTri.Add(vertices.Count + 1);
thisTri.Add(vertices.Count + 2);
trisList.Add(thisTri);
Vector3 normal = Vector3.Cross(v1 - v0, v2 - v0);
normals.Add(normal);
normals.Add(normal);
normals.Add(normal);
////correctly calulates the UV's based on the position of the triangle within the mesh
uvs.Add(new Vector2((float)triangle.vertices[2].x / meshBounds.size.x, (float)triangle.vertices[2].y / meshBounds.size.y));
uvs.Add(new Vector2((float)triangle.vertices[1].x / meshBounds.size.x, (float)triangle.vertices[1].y / meshBounds.size.y));
uvs.Add(new Vector2((float)triangle.vertices[0].x / meshBounds.size.x, (float)triangle.vertices[0].y / meshBounds.size.y));
}
UnityEngine.Mesh chunkMesh = new UnityEngine.Mesh();
chunkMesh.vertices = vertices.ToArray();
chunkMesh.triangles = triangles.ToArray();
chunkMesh.uv = uvs.ToArray();
chunkMesh.normals = normals.ToArray();
chunkMesh.colors = vertColors.ToArray();
#endregion
#region Mounatains and Rivers
if (enabledElevation || enableRivers)
{
Dictionary <int, BiomeType> vertBiomes = new Dictionary <int, BiomeType>();
vertBiomes = MeshSearching.setVertBiomes(chunkMesh, islandHeight);
MeshSearching.VertexConnection[] vertCons = MeshSearching.FindAllOverLappingVert(chunkMesh);
List <int> borderVerts = HelperFunctions.findBorderVerts(trisList, vertBiomes, chunkMesh, BiomeType.land, BiomeType.water);
int mountainIndex = int.MaxValue;
if (enabledElevation)
{
if (enableSlowElevationGeneration)
{
mountainIndex = MeshSearching.findCentreOfIsland(chunkMesh, vertBiomes, borderVerts, vertCons, trisList);
}
else
{
int mountain = MeshSearching.findCentreOfIslandSimple(chunkMesh, vertBiomes, borderVerts, vertCons, trisList);
}
}
if (enableRivers)
{
int nRiversMax = Random.Range((int)nRivers.x, (int)nRivers.y);
int maxIterationsOfRiverSearch = maximumRiverIterations;
int maxIter = maxIterationsOfRiverSearch;
List <int> allLandIndexs = new List <int>();
for (int i = 0; i < vertBiomes.Count; i++)
{
if (vertBiomes[i] == BiomeType.land)
{
allLandIndexs.Add(i);
}
}
for (int i = (int)nRivers.x; i < nRiversMax; i++)
{
defineRiversDownwards(chunkMesh, borderVerts, maxIterationsOfRiverSearch, mountainIndex, allLandIndexs);
maxIterationsOfRiverSearch -= riverIterationsDecrimentAmount;
if (maxIterationsOfRiverSearch <= 0)
{
maxIterationsOfRiverSearch = maxIter;
}
}
}
}
#endregion
//find tallest point so that it can be passed to the shader
float currentMax = 0;
for (int i = 0; i < chunkMesh.vertices.Length; i++)
{
if (chunkMesh.vertices[i].y > currentMax)
{
currentMax = chunkMesh.vertices[i].y;
}
}
Renderer ShaderRender = chunkPrefab.GetComponent <Renderer>();
ShaderRender.sharedMaterial.SetFloat("MinHeight", 0);
ShaderRender.sharedMaterial.SetFloat("MaxHeight", currentMax);
//Spawning mesh into world
GameObject rotationParent = new GameObject();
GameObject chunk = Instantiate(chunkPrefab, new Vector3(transform.position.x + xOffSet, transform.position.y, transform.position.z + yOffSet), transform.rotation);
chunk.GetComponent <MeshFilter>().mesh = chunkMesh;
chunk.GetComponent <MeshCollider>().sharedMesh = chunkMesh;
chunk.transform.parent = rotationParent.transform;
Camera.main.gameObject.transform.position = new Vector3(chunk.transform.position.x + xsize / 2, Camera.main.transform.position.y, chunk.transform.position.z + ysize / 2);
rotationParent.transform.parent = transform;
}
}