public void ConstructMesh()
{
int resolution = pointDensity * terrainSize;
Vector3[] verticies = new Vector3[resolution * resolution];
Debug.Log("Num Vertices = " + (resolution * resolution));
int[] triangles = new int[(resolution - 1) * (resolution - 1) * 6];
Debug.Log("Num Triangles = " + ((resolution - 1) * (resolution - 1) * 6));
int triIndex = 0;
mesh = meshFilter.sharedMesh;
// set indexFormat from 16bit to 32bit so that we can have a more detailed mesh
meshFilter.sharedMesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
for (int y = 0; y < resolution; y++)
{
for (int x = 0; x < resolution; x++)
{
// (x,y) / pointDensity = game coordinate
Vector2 point = new Vector2(x, y) / (float)pointDensity;
// noiseVal is the height value at our coordinate
float noiseVal = terrainGenerator.CalculatePointOnPlanet(point + center);
elevationMinMax.AddValue(noiseVal); // track min/max values for our terrain
// index of the current point
int i = y + x * resolution;
// set the vertex for our mesh
verticies[i] = new Vector3(point.x, noiseVal, point.y);
// create triangles for mesh
// triangles are created in clockwise pattern
if (x != resolution - 1 && y != resolution - 1)
{
triangles[triIndex] = i; // starting point
triangles[triIndex + 1] = i + resolution + 1; // point on the next row + 1
triangles[triIndex + 2] = i + resolution;
triangles[triIndex + 3] = i;
triangles[triIndex + 4] = i + 1;
triangles[triIndex + 5] = i + 1 + resolution;
triIndex += 6;
}
}
}
// update color generator with new minmax values
colorGenerator.UpdateElevation(elevationMinMax);
//colorGenerator.UpdateColors();
// update mesh with new triangles
mesh.Clear();
mesh.vertices = verticies;
mesh.triangles = triangles;
mesh.RecalculateNormals();
}