/// <summary>
/// Applies a random material distribution to the terrain grid.
/// </summary>
public void ApplyMaterialLayer(GridMaterial mat, float scale, Vector2 seed, float chance)
{
int s2 = Size * 2;
for (int i = 1; i < s2; i++)
{
for (int j = 0; j < Size; j++)
{
GridFace face = new GridFace(i, j);
Vector2 pos = face.ToCartesianCoords2D();
// pos += face.PointsUp() ? new Vector2(0f, 0.333f * 0.866f) : pos += new Vector2(0f, 0.667f * 0.866f);
if (SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale) < chance)
{
Materials[i, j] = mat;
}
}
}
}
/// <summary>
/// Applies a material distribution to the terrain grid, based on height.
/// </summary>
public void ApplyLowMaterialLayer(GridMaterial mat, float scale, Vector2 seed, float clamp, float mul)
{
int s2 = Size * 2;
for (int i = 1; i < s2; i++)
{
for (int j = 0; j < Size; j++)
{
GridFace face = new GridFace(i, j);
double h = 0;
foreach (GridVertex vert in face.Corners())
{
h += HeightMap[vert.U, vert.V];
}
h *= 0.333f;
Vector2 pos = face.ToCartesianCoords2D();
// pos += face.PointsUp() ? new Vector2(0f, 0.333f * 0.866f) : pos += new Vector2(0f, 0.667f * 0.866f);
if ((SimplexNoise.Generate(seed.X + pos.X * scale, seed.Y + pos.Y * scale) - 0.5) * mul + h < clamp)
{
Materials[i, j] = mat;
}
}
}
}
/// <summary>
/// Fired when entity is spawned.
/// </summary>
public override void OnSpawn()
{
Game game = Engine3D.Source as Game;
// Generate the layer seeds, height map and materials
int s2 = Size * 2;
Seeds = new Vector2[Layers];
for (int i = 0; i < Layers; i++)
{
Seeds[i] = new Vector2((float)game.Random.NextDouble(), (float)game.Random.NextDouble());
}
GenerateHeightMap(2.0f);
ApplyClampedHeightMap(8.0f, 0.025f, 0.0f, 0.75f, Seeds[0]);
ApplyHeightMap(0.5f, 0.25f, 0.5f, Seeds[1]);
ApplyHighHeightMap(2.0f, 0.15f, 0.5f, 7.0f, Seeds[2]);
GenerateMaterialLayer(GridMaterial.Grass);
ApplyHighMaterialLayer(GridMaterial.Dirt, 0.05f, Seeds[3], 7.0f, 3.0f);
ApplyHighMaterialLayer(GridMaterial.Rock, 0.025f, Seeds[4], 9.0f, 1.0f);
ApplyLowMaterialLayer(GridMaterial.Water, 0.1f, Seeds[5], 3.0f, 0.5f);
// Generate the terrain grid mesh: Vertices, Normals and Indices
Builder = new Renderable.ListBuilder();
int n = s2 * Size * 3;
Builder.Prepare(n);
for (int i = 1; i < s2; i++)
{
for (int j = 0; j < Size; j++)
{
GridFace face = new GridFace(i, j);
List <Vector3> vertices = new List <Vector3>();
foreach (GridVertex vert in face.Corners())
{
vertices.Add(vert.ToCartesianCoords3D(HeightMap));
Builder.AddEmptyBoneInfo();
}
Builder.Vertices.AddRange(vertices);
Vector3[] vArray = vertices.ToArray();
Vector3 normal = Vector3.Cross(vArray[2] - vArray[0], vArray[1] - vArray[0]);
normal.Normalize();
Builder.Normals.Add(normal);
Builder.Normals.Add(normal);
Builder.Normals.Add(normal);
Vector4 c = Materials[i, j].Color.ToOpenTK();
Builder.Colors.Add(c);
Builder.Colors.Add(c);
Builder.Colors.Add(c);
if (face.PointsUp())
{
Builder.TexCoords.Add(new Vector3(0, 0, 0));
Builder.TexCoords.Add(new Vector3(0.5f, 1, 0));
Builder.TexCoords.Add(new Vector3(1, 0, 0));
}
else
{
Builder.TexCoords.Add(new Vector3(1, 1, 0));
Builder.TexCoords.Add(new Vector3(0.5f, 0, 0));
Builder.TexCoords.Add(new Vector3(0, 1, 0));
}
}
}
int count = Builder.Vertices.Count;
for (uint k = 0; k < count; k++)
{
Builder.Indices.Add(k);
}
Rend = Builder.Generate();
BEPUutilities.Vector3 scaling = new BEPUutilities.Vector3(0.5, 1, -0.866);
BEPUutilities.Quaternion rotation = BEPUutilities.Quaternion.CreateFromAxisAngle(BEPUutilities.Vector3.UnitX, MathHelper.PiOver2);
BEPUutilities.Vector3 translation = BEPUutilities.Vector3.Zero;
Body = new Terrain(new TerrainShape(HeightMap), new BEPUutilities.AffineTransform(ref scaling, ref rotation, ref translation))
{
ImproveBoundaryBehavior = true
};
}
/// <summary>
/// Wether this grid face 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)
{
GridFace face = (GridFace)obj;
return(face.U == U && face.V == V);
}