public void ConstructMesh()
{
Vector3[] vertices = new Vector3[resolution * resolution];
int[] triangles = new int[(resolution - 1) * (resolution - 1) * 6];
int triIndex = 0;
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 = height + (percent.x - .5f) * 2 * axisA + (percent.y - .5f) * 2 * axisB;
Vector3 pointOnUnitSphere = SphereMaths.UnitCubeToUnitSphere(pointOnUnitCube);
vertices[i] = shapeGenerator.CalculatePointOnPlanet(pointOnUnitSphere);
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;
}
}
}
//mesh.Clear();
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.RecalculateNormals();
}
public Chunk(Planet planet, int i, int u, int v, ShapeGenerator shapeGenerator)
{
this.shapeGenerator = shapeGenerator;
this.planet = planet;
this.face = planet.terrainFaces[i];
this.faceI = i;
this.faceU = u;
this.faceV = v;
this.shapeData = this.planet.shapeData;
chunkID = "Chunk " + faceI + " (" + faceU + "," + faceV + ")";
SetLOD();
//Centre point
int ResM1 = chunkResolution - 1;
float UVstep = 1f / shapeData.chunksPerFace;
float step = UVstep / ResM1;
Vector2 offset = new Vector3((-0.5f + faceU * UVstep), (-0.5f + faceV * UVstep));
int x = chunkResolution / 2;
Vector2 p = offset + new Vector2(x * step, x * step);
Vector3 pointOnUnitCube = face.axisB * p.x + face.axisA * p.y + face.height * -0.5f;
Vector3 pointOnUnitSphere = SphereMaths.UnitCubeToUnitSphere(pointOnUnitCube);
Vector3 point = planet.ShapeGenerator.CalculatePointOnPlanet(pointOnUnitSphere);
this.centre = GeoCoord.GetLatLon(planet, point);
}
//Gets a vector for the centre of the chunk.
public void CalculateCentre(int chunkResolution, float radius)
{
float UVstep = 1f / chunkResolution;
float step = UVstep / (resolution - 1);
Vector2 offset = new Vector3((-0.5f + faceCoord.u * UVstep), (-0.5f + faceCoord.v * UVstep));
int x = resolution / 2;
Vector2 p = offset + new Vector2(x * step, x * step);
Vector3 pointOnUnitCube = face.axisB * p.x + face.axisA * p.y + face.axisC * -0.5f;
Vector3 pointOnUnitSphere = SphereMaths.UnitCubeToUnitSphere(pointOnUnitCube);
this.centre = pointOnUnitSphere * radius;
this.latLon = GeoCoord.GetLatLon(planet, centre);
}
