/// <summary>
/// Generate the data for the meshes and the population locations.
/// </summary>
public void GenerateMesh()
{
List <Vector3> t_vertices = new List <Vector3>();
List <int> t_triangles = new List <int>();
List <Color> t_colors = new List <Color>();
// If the chunck don't need to be divided.
if (planet.GetChunkSubdivisions() == 0)
{
// Only asssign the original triangle.
List <Vector3> v = planet.GetVertices();
t_vertices = new List <Vector3>()
{
v[vertices[0]], v[vertices[1]], v[vertices[2]]
};
t_triangles = new List <int>()
{
0, 1, 2
};
meshData = new MeshData(t_vertices, t_triangles, t_colors);
Planet.AddPolygonToQueue(this);
return;
}
List <List <Vector3> > sub_vertices = Subdivide(vertices);
List <Mesh> meshes = new List <Mesh>();
int size = (int)Mathf.Pow(2, planet.GetChunkSubdivisions());
int iv = 0;
PopulateData[] population = planet.GetPopulation();
pop = new List <Vector3> [population.Length];
for (int i = 0; i < pop.Length; i++)
{
pop[i] = new List <Vector3>();
}
// Create the mesh data.
for (int x = 0; x < size; x++)
{
for (int y = 0; y < size - x; y++)
{
if (Planet.ThreadNeedToQuit())
{
return;
}
Vector3 v1, v2, v3, v4 = Vector3.zero;
v1 = sub_vertices[x][y];
v2 = sub_vertices[x][y + 1];
v3 = sub_vertices[x + 1][y];
// Variables for the height of each vertex of the triangle.
float h1 = 0.0f, h2 = 0.0f, h3 = 0.0f, h4 = 0.0f;
h1 = getHeight(v1);
h2 = getHeight(v2);
h3 = getHeight(v3);
v1 = v1 + (v1).normalized * h1;
v2 = v2 + (v2).normalized * h2;
v3 = v3 + (v3).normalized * h3;
if (planet.GetStyle() == Style.LowPoly)
{
t_vertices.Add(v1 + planet.GetPosition());
t_vertices.Add(v2 + planet.GetPosition());
t_vertices.Add(v3 + planet.GetPosition());
t_triangles.Add(iv + 0);
t_triangles.Add(iv + 1);
t_triangles.Add(iv + 2);
if (h1 > 19 && h2 > 19 && h3 > 19)
{
t_colors.Add(new Color(0.6415094f, 0.5063629f, 0.1845852f, 1));
t_colors.Add(new Color(0.6415094f, 0.5063629f, 0.1845852f, 1));
t_colors.Add(new Color(0.6415094f, 0.5063629f, 0.1845852f, 1));
}
else if (h1 > 16 && h2 > 16 && h3 > 16)
{
t_colors.Add(new Color(0.4470589f, 0.6392157f, 0.145098f, 1));
t_colors.Add(new Color(0.4470589f, 0.6392157f, 0.145098f, 1));
t_colors.Add(new Color(0.4470589f, 0.6392157f, 0.145098f, 1));
}
else if (h1 > 14 && h2 > 14 && h3 > 14)
{
t_colors.Add(new Color(0.6196079f, 0.6431373f, 0.1568628f, 1));
t_colors.Add(new Color(0.6196079f, 0.6431373f, 0.1568628f, 1));
t_colors.Add(new Color(0.6196079f, 0.6431373f, 0.1568628f, 1));
}
else
{
t_colors.Add(new Color(0.9450981f, 0.8392158f, 0.4980392f, 1));
t_colors.Add(new Color(0.9450981f, 0.8392158f, 0.4980392f, 1));
t_colors.Add(new Color(0.9450981f, 0.8392158f, 0.4980392f, 1));
}
iv += 3;
}
else
{
Vector3[] triangle = new Vector3[3] {
v1, v2, v3
};
MeshData mesh_data = TriangleToStair(triangle);
foreach (var item in mesh_data.vertices)
{
t_vertices.Add(item);
}
foreach (var item in mesh_data.triangles)
{
t_triangles.Add(iv + item);
}
foreach (var item in mesh_data.colors)
{
t_colors.Add(item);
}
iv += mesh_data.vertices.Count;
}
if (x != 0)
{
v4 = sub_vertices[x - 1][y + 1];
h4 = getHeight(v4);
v4 = v4 + v4.normalized * h4;
if (planet.GetStyle() == Style.LowPoly)
{
t_vertices.Add(v1 + planet.GetPosition());
t_vertices.Add(v2 + planet.GetPosition());
t_vertices.Add(v4 + planet.GetPosition());
t_triangles.Add(iv + 0);
t_triangles.Add(iv + 2);
t_triangles.Add(iv + 1);
if (h1 > 19 && h2 > 19 && h4 > 19)
{
t_colors.Add(new Color(0.6415094f, 0.5063629f, 0.1845852f, 1));
t_colors.Add(new Color(0.6415094f, 0.5063629f, 0.1845852f, 1));
t_colors.Add(new Color(0.6415094f, 0.5063629f, 0.1845852f, 1));
}
else if (h1 > 16 && h2 > 16 && h4 > 16)
{
t_colors.Add(new Color(0.4470589f, 0.6392157f, 0.145098f, 1));
t_colors.Add(new Color(0.4470589f, 0.6392157f, 0.145098f, 1));
t_colors.Add(new Color(0.4470589f, 0.6392157f, 0.145098f, 1));
}
else if (h1 > 14 && h2 > 14 && h4 > 14)
{
t_colors.Add(new Color(0.6196079f, 0.6431373f, 0.1568628f, 1));
t_colors.Add(new Color(0.6196079f, 0.6431373f, 0.1568628f, 1));
t_colors.Add(new Color(0.6196079f, 0.6431373f, 0.1568628f, 1));
}
else
{
t_colors.Add(new Color(0.9450981f, 0.8392158f, 0.4980392f, 1));
t_colors.Add(new Color(0.9450981f, 0.8392158f, 0.4980392f, 1));
t_colors.Add(new Color(0.9450981f, 0.8392158f, 0.4980392f, 1));
}
iv += 3;
}
else
{
Vector3[] triangle2 = new Vector3[3] {
v1, v2, v4
};
MeshData mesh_data2 = TriangleToStair(triangle2);
foreach (var item in mesh_data2.vertices)
{
t_vertices.Add(item);
}
foreach (var item in mesh_data2.triangles)
{
t_triangles.Add(iv + item);
}
foreach (var item in mesh_data2.colors)
{
t_colors.Add(item);
}
iv += mesh_data2.vertices.Count;
}
}
if (Vector3.Magnitude(v1) < planet.GetSeaLevel() ||
Vector3.Magnitude(v2) < planet.GetSeaLevel() ||
Vector3.Magnitude(v3) < planet.GetSeaLevel())
{
// Only asssign the original triangle.
List <Vector3> v = planet.GetVertices();
List <Vector3> sea_t_vertices = new List <Vector3>()
{
(v[vertices[0]] - planet.GetPosition()).normalized * planet.GetSeaLevel() + planet.GetPosition(),
(v[vertices[1]] - planet.GetPosition()).normalized * planet.GetSeaLevel() + planet.GetPosition(),
(v[vertices[2]] - planet.GetPosition()).normalized * planet.GetSeaLevel() + planet.GetPosition()
};
List <int> sea_t_triangles = new List <int>()
{
0, 1, 2
};
List <Color> sea_t_colors = new List <Color>();
seaMeshData = new MeshData(sea_t_vertices, sea_t_triangles, sea_t_colors);
}
Vector3 a = v1;
Vector3 b = v2;
Vector3 c = v3;
Vector3 d = v4;
for (int i = 0; i < pop.Length; i++)
{
float rand1 = (float)rng.NextDouble();
float rand2 = (float)rng.NextDouble();
Vector3 ac = Vector3.Lerp(a, c, rand1);
Vector3 bc = Vector3.Lerp(b, c, rand1);
Vector3 point = Vector3.Lerp(ac, bc, rand2);
float height = Vector3.Magnitude(point);
if (Style.Terrace == planet.GetStyle())
{
height = Mathf.Floor(height);
point = point.normalized * height;
}
if (height >= population[i].minHeight && height <= population[i].maxHeight &&
population[i].GetHeightAtPosition(point) > 0 &&
population[i].probability > (float)rng.NextDouble())
{
pop[i].Add(point + planet.GetPosition());
}
if (x != 0)
{
rand1 = (float)rng.NextDouble();
rand2 = (float)rng.NextDouble();
Vector3 ab = Vector3.Lerp(a, b, rand1);
Vector3 db = Vector3.Lerp(d, b, rand1);
point = Vector3.Lerp(ab, db, rand2);
height = Vector3.Distance(planet.GetPosition(), point);
if (Style.Terrace == planet.GetStyle())
{
height = Mathf.Floor(height);
point = point.normalized * height;
}
if (height >= population[i].minHeight && height <= population[i].maxHeight &&
population[i].GetHeightAtPosition(point) > 0 &&
population[i].probability > (float)rng.NextDouble())
{
pop[i].Add(point + planet.GetPosition());
}
}
}
}
}
// Assign the mesh data.
meshData = new MeshData(t_vertices, t_triangles, t_colors);
Planet.AddPolygonToQueue(this);
}
/// <summary>
/// From a triangle generate a stair.
/// </summary>
/// <param name="triangle">Triangle to use.</param>
/// <returns>Return the mesh of the stair.</returns>
private MeshData TriangleToStair(Vector3[] triangle)
{
Vector3 middle = planet.GetPosition();
MeshData mesh_data = new MeshData();
Vector3 v1, v2, v3;
v1 = triangle[0];
v2 = triangle[1];
v3 = triangle[2];
Organize(ref v1, ref v2, ref v3);
float h1, h2, h3;
h1 = Vector3.Magnitude(v1);
h2 = Vector3.Magnitude(v2);
h3 = Vector3.Magnitude(v3);
int h_min, h_max;
h_min = Mathf.FloorToInt(Mathf.Min(h1, h2, h3));
h_max = Mathf.FloorToInt(Mathf.Max(h1, h2, h3));
int iv = 0;
for (int h = h_min; h <= h_max; h++)
{
int points_above = 0;
if (h3 == h2 && h3 == h1)
{
points_above = 3;
}
else if (h3 > h)
{
points_above = 3;
}
else if (h2 > h)
{
points_above = 2;
}
else
{
points_above = 1;
}
// Current Plane.
Vector3 v1_c, v2_c, v3_c;
v1_c = v1.normalized * h;
v2_c = v2.normalized * h;
v3_c = v3.normalized * h;
// Previous Plane.
Vector3 v1_p, v2_p, v3_p;
v1_p = v1.normalized * (h - 1);
v2_p = v2.normalized * (h - 1);
v3_p = v3.normalized * (h - 1);
Vector3 normal = Vector3.Cross(v1_p - v2_p, v3_p - v2_p).normalized;
float d = -Vector3.Dot(normal, v1_p);
float sign1 = d;
float distance = Mathf.Abs(normal.x * v1_c.x + normal.y * v1_c.y + normal.z * v1_c.z + d);
Color color = Color.white;
ColorHeight[] colorHeight = planet.GetColorHeight();
foreach (var item in colorHeight)
{
if (h > item.layer)
{
color = item.color;
break;
}
}
if (points_above == 3)
{
// Floor.
mesh_data.vertices.Add(v1_c + middle);
mesh_data.vertices.Add(v2_c + middle);
mesh_data.vertices.Add(v3_c + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
if (sign1 < 0)
{
// Floor.
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
}
else
{
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
}
iv += 3;
}
else if (points_above == 2)
{
float t1 = (h1 - h) / (h1 - h3);
Vector3 v1_v3_c = Vector3.Lerp(v1, v3, t1);
Vector3 v1_v3_p = v1_v3_c + Vector3.Cross(v1_c - v2_c, v3_c - v2_c).normalized *distance *Mathf.Sign(sign1);
float t2 = (h2 - h) / (h2 - h3);
Vector3 v2_v3_c = Vector3.Lerp(v2, v3, t2);
Vector3 v2_v3_p = v2_v3_c + Vector3.Cross(v1_c - v2_c, v3_c - v2_c).normalized *distance *Mathf.Sign(sign1);
if (sign1 < 0)
{
// Floor.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v1_c + middle);
mesh_data.vertices.Add(v2_c + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 3);
mesh_data.triangles.Add(iv + 2);
iv += 4;
// Wall.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v1_v3_p + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v2_v3_p + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 3);
mesh_data.triangles.Add(iv + 2);
iv += 4;
}
else
{
// Floor.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v1_c + middle);
mesh_data.vertices.Add(v2_c + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 3);
iv += 4;
// Wall.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v1_v3_p + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v2_v3_p + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 3);
iv += 4;
}
}
else if (points_above == 1)
{
float t1 = (h1 - h) / (h1 - h3);
Vector3 v1_v3_c = Vector3.Lerp(v1, v3, t1);
Vector3 v1_v3_p = v1_v3_c + Vector3.Cross(v1_c - v2_c, v3_c - v2_c).normalized *distance *Mathf.Sign(sign1);
float t2 = (h1 - h) / (h1 - h2);
Vector3 v2_v3_c = Vector3.Lerp(v1, v2, t2);
Vector3 v2_v3_p = v2_v3_c + Vector3.Cross(v1_c - v2_c, v3_c - v2_c).normalized *distance *Mathf.Sign(sign1);
if (sign1 < 0)
{
// Floor.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v1_c + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
iv += 3;
// Wall.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v1_v3_p + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v2_v3_p + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 3);
mesh_data.triangles.Add(iv + 2);
iv += 4;
}
else
{
// Floor.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v1_c + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
iv += 3;
// Wall.
mesh_data.vertices.Add(v1_v3_c + middle);
mesh_data.vertices.Add(v1_v3_p + middle);
mesh_data.vertices.Add(v2_v3_c + middle);
mesh_data.vertices.Add(v2_v3_p + middle);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.colors.Add(color);
mesh_data.triangles.Add(iv);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 1);
mesh_data.triangles.Add(iv + 2);
mesh_data.triangles.Add(iv + 3);
iv += 4;
}
}
}
MeshData data = new MeshData();
data.vertices = new List <Vector3>(triangle);
int[] i = new int[3] {
0, 1, 2
};
data.triangles = new List <int>(i);
return(mesh_data);
}