public void ConstructMesh()
{
Vector3[] vertices = new Vector3[resolution * resolution]; //Number of vertices along a single edge of a face(resolution squared)
int[] triangles = new int[(resolution - 1) * (resolution - 1) * 6];
int triIndex = 0; //Keeps a track of whicch point of the square is where
//we want to make sure that uvs are thye right size in case resolution is changed, aso we add an ifd statement
Vector2[] uv = (mesh.uv.Length == vertices.Length)? mesh.uv : new Vector2[vertices.Length]; //This is added so when we rebuild the mesh we don't want to lose the uv data.
//This method uses the same technique we used in Physics to crerate the Physics Flag
for (int y = 0; y < resolution; y++)
{
for (int x = 0; x < resolution; x++)
{
int i = x + y * resolution;
Vector2 percent = new Vector2(x, y) / (resolution - 1);
Vector3 pointOnUnitCube = localUp + (percent.x - .5f) * 2 * axisA + (percent.y - .5f) * 2 * axisB;
Vector3 pointOnUnitSphere = pointOnUnitCube.normalized;
//vertices[i] = pointOnUnitCube; //Displays a cube instead of a sphere
//vertices[i] = pointOnUnitSphere; //Just to infllate cube to Shhere
//vertices[i] = shapeGenerator.CalclulatePointOnPlanet(pointOnUnitSphere); //Before altering CalculatePointOnPlanet to add ocean depth
float unscaledElevation = shapeGenerator.CalculateUncsaledElevation(pointOnUnitSphere);
vertices[i] = pointOnUnitSphere * shapeGenerator.GetScaledElevation(unscaledElevation);
uv[i].y = unscaledElevation; //X axis is used for biomes
if (x != resolution - 1 && y != resolution - 1)
{
triangles[triIndex] = i;
triangles[triIndex + 1] = i + resolution + 1;
triangles[triIndex + 2] = i + resolution;
triangles[triIndex + 3] = i;
triangles[triIndex + 4] = i + 1;
triangles[triIndex + 5] = i + resolution + 1;
triIndex += 6;
}
}
}
//If we update the mesh with a lower resolution version we will be referencing indeices that don't ewxist, so we clear out the mesh and reassign it.
mesh.Clear();
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.normals = vertices; //Fixes the seams temporarily instead of recalculating the nmormals. also saves computiung power
//mesh.RecalculateNormals(); //works but seams are visible
if (mesh.uv.Length == uv.Length)
{
mesh.uv = uv;
}
}
