/// <summary>
/// Rotates a grid vector the specified amount of times. +1 is 60 degrees clockwise.
/// </summary>
/// <param name="times">How many times to rotate.</param>
/// <returns>The new rotated grid vector.</returns>
public GridVertex Rotate(int times)
{
GridVertex old = this;
int index = Array.FindIndex(Directions, vert => vert.Equals(old));
return(Directions[(index + times + 6) % 6]);
}
/// <summary>
/// Applies a random height distribution to the terrain grid.
/// </summary>
public void ApplyHighHeightMap(float h, float scale, float offset, float limit, Vector2 seed)
{
for (int j = 0; j <= Size; j++)
{
int x = j % 2;
GridVertex vert = new GridVertex(x, j);
if (HeightMap[vert.U, vert.V] > limit)
{
Vector2 pos = vert.ToCartesianCoords2D();
HeightMap[x, j] += (SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale) - offset) * h;
}
}
for (int i = 1; i <= Size; i++)
{
for (int j = 0; j <= Size; j++)
{
int x = i * 2 + (j % 2);
GridVertex vert = new GridVertex(x, j);
if (HeightMap[vert.U, vert.V] > limit)
{
Vector2 pos = vert.ToCartesianCoords2D();
HeightMap[x, j] += (SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale) - offset) * h;
HeightMap[x - 1, j] = (HeightMap[x, j] + HeightMap[x - 2, j]) / 2;
}
}
}
}
/// <summary>
/// Adjusts the height of the specified vertex, updating the terrain.
/// </summary>
/// <param name="vert">The adjusted vertex.</param>
/// <param name="h">The height that will be added.</param>
public void AdjustVertexHeight(GridVertex vert, float h)
{
HeightMap[vert.U, vert.V] += h;
Body.Shape.Heights[vert.U, vert.V] += h;
int index = ((vert.U - 1) * Size + vert.V) * 3;
int s3 = Size * 3;
Vector3 point = vert.ToCartesianCoords3D(HeightMap);
Builder.Vertices[index - s3 - 1] = point;
Builder.Vertices[index - 3] = point;
Builder.Vertices[index + s3 - 2] = point;
Builder.Vertices[index - s3 + 1] = point;
Builder.Vertices[index] = point;
Builder.Vertices[index + s3 + 2] = point;
Rend.GenerateVBO(Builder);
}
/// <summary>
/// Applies a random height distribution to the terrain grid.
/// </summary>
public void ApplyClampedHeightMap(float h, float scale, float offset, float clamp, Vector2 seed)
{
for (int j = 0; j <= Size; j++)
{
int x = j % 2;
Vector2 pos = new GridVertex(x, j).ToCartesianCoords2D();
HeightMap[x, j] += (Math.Min(SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale), clamp) - offset) * h;
}
for (int i = 1; i <= Size; i++)
{
for (int j = 0; j <= Size; j++)
{
int x = i * 2 + (j % 2);
Vector2 pos = new GridVertex(x, j).ToCartesianCoords2D();
HeightMap[x, j] += (Math.Min(SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale), clamp) - offset) * h;
HeightMap[x - 1, j] = (HeightMap[x, j] + HeightMap[x - 2, j]) / 2;
}
}
}
/// <summary>
/// Applies a random height distribution to the terrain grid.
/// </summary>
public void GenerateHeightMap(double h)
{
HeightMap = new double[Size * 2 + 2, Size + 1];
for (int j = 0; j <= Size; j++)
{
int x = j % 2;
Vector2 pos = new GridVertex(x, j).ToCartesianCoords2D();
HeightMap[x, j] = h;
}
for (int i = 1; i <= Size; i++)
{
for (int j = 0; j <= Size; j++)
{
int x = i * 2 + (j % 2);
Vector2 pos = new GridVertex(x, j).ToCartesianCoords2D();
HeightMap[x, j] = h;
HeightMap[x - 1, j] = h;
}
}
}
/// <summary>
/// Wether this grid vertex equals an object.
/// </summary>
/// <param name="obj">The object to compare to.</param>
/// <returns>Wether they are equal.</returns>
public override bool Equals(object obj)
{
GridVertex vert = (GridVertex)obj;
return(vert.U == U && vert.V == V);
}