public static TerrainFace GenerateTerrainFace(int resolution, Vector3 localUp, ShapeSettings settings)
{
var axisA = new Vector3(localUp.y, localUp.z, localUp.x);
var axisB = Vector3.Cross(localUp, axisA);
var shapeGenerator = new ShapeGenerator(settings);
Vector3[] vertices = new Vector3[resolution * resolution];
int[] triangles = new int[(resolution - 1) * (resolution - 1) * 6];
int triIndex = 0;
var minMax = new MinMax();
for (int y = 0; y < resolution; y++)
{
for (int x = 0; x < resolution; x++)
{
int i = x + y * resolution; // Same as doing int i = 0 outside loop, and i++ inside loop
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;
var elevation = shapeGenerator.CalculateElevation(pointOnUnitSphere);
var vertex = pointOnUnitSphere * elevation;
minMax.AddValue(elevation);
vertices[i] = vertex;
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;
}
}
}
var mesh = new Mesh();
mesh.Clear();
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.RecalculateNormals();
return(new TerrainFace()
{
Mesh = mesh, ElevationRange = minMax
});
}
