//Mesh generation, with a heightMap, heightRate, a curve, and a level of details (number of edges)
public static MeshDatas GenerateMesh(float[,] heightMap, float heightRate = 1, AnimationCurve heightCurve = null, int levelOfDetail = 0)
{
int width = heightMap.GetLength(0);
int height = heightMap.GetLength(1);
float topLeftX = (width - 1f) / (-2f);
float topLeftZ = (height - 1f) / 2f;
int meshDetails = levelOfDetail * 2;//to have 1 edge of 1,2,4,6,8,10,12 drawn
if (meshDetails == 0)
{
meshDetails = 1;
}
int verticePerLine = (width - 1) / meshDetails + 1;
int verticePerColumns = (height - 1) / meshDetails + 1;
MeshDatas mesh = new MeshDatas(verticePerLine, verticePerColumns);
int vertexIndex = 0;
for (int j = 0; j < height; j += meshDetails)// draw 1 edge of meshDetails on the heightMap
{
for (int i = 0; i < width; i += meshDetails)
{
if (heightCurve == null)//vertice
{
mesh.vertices[vertexIndex] = new Vector3(topLeftX + i, heightMap[i, j] * heightRate, topLeftZ - j);
}
else
{
mesh.vertices[vertexIndex] = new Vector3(topLeftX + i, heightCurve.Evaluate(heightMap[i, j]) * heightRate, topLeftZ - j);
}
mesh.uvs[vertexIndex] = new Vector2(i / (float)width, j / (float)height); //textures
if (i < width - 1 && j < height - 1) //edges
{
mesh.AddTriangle(vertexIndex, vertexIndex + verticePerLine + 1, vertexIndex + verticePerLine);
mesh.AddTriangle(vertexIndex + verticePerLine + 1, vertexIndex, vertexIndex + 1);
}
vertexIndex++;
}
}
return(mesh);
}
//3D Scene Rendering
public void DrawMeshes(MeshDatas mesh, Texture2D texture)
{
meshFilter.sharedMesh = mesh.CreateMesh();
meshRenderer.sharedMaterial.mainTexture = texture;
}
