void TriangulateBoundaryTriangle(Vector3 begin, Color beginColor, Vector3 left, Color leftColor, Vector3 boundary, Color boundaryColor, Vector3 types)
{
Vector3 v2 = HexMetric.Perturb(HexMetric.TerraceLerp(begin, left, 1));
Color c2 = HexMetric.TerraceLerp(beginColor, leftColor, 1);
// first triangle
terrain.AddTriangleUnperturbed(HexMetric.Perturb(begin), v2, boundary);
terrain.AddTriangleColor(beginColor, c2, boundaryColor);
terrain.AddTriangleTerrainTypes(types);
//connect terrace with cliff
for (int i = 2; i < HexMetric.terraceSteps; i++)
{
Vector3 v1 = v2;
Color c1 = c2;
v2 = HexMetric.Perturb(HexMetric.TerraceLerp(begin, left, i));
c2 = HexMetric.TerraceLerp(beginColor, leftColor, i);
terrain.AddTriangleUnperturbed(v1, v2, boundary);
terrain.AddTriangleColor(c1, c2, boundaryColor);
terrain.AddTriangleTerrainTypes(types);
}
//last triangle
terrain.AddTriangleUnperturbed(v2, HexMetric.Perturb(left), boundary);
terrain.AddTriangleColor(c2, leftColor, boundaryColor);
terrain.AddTriangleTerrainTypes(types);
}
private void TriangulateCornerCliffTerraces(Vector3 begin, HexCell beginCell, Vector3 left, HexCell leftCell, Vector3 right, HexCell rightCell)
{
float b = 1f / (leftCell.Elevation - beginCell.Elevation);
if (b < 0)
{
b = -b;
}
Vector3 boundary = Vector3.Lerp(HexMetric.Perturb(begin), HexMetric.Perturb(left), b);
Color boundaryColor = Color.Lerp(color1, color2, b);
Vector3 types;
types.x = beginCell.TerrainTypeIndex;
types.y = leftCell.TerrainTypeIndex;
types.z = rightCell.TerrainTypeIndex;
//lower connection
TriangulateBoundaryTriangle(right, color3, begin, color1, boundary, boundaryColor, types);
//upper terrace connection
if (leftCell.GetEdgeType(rightCell) == HexEdgeType.Slope)
{
TriangulateBoundaryTriangle(left, color2, right, color3, boundary, boundaryColor, types);
}
else //upper cliff connection
{
terrain.AddTriangleUnperturbed(HexMetric.Perturb(left), HexMetric.Perturb(right), boundary);
terrain.AddTriangleColor(color2, color3, boundaryColor);
terrain.AddTriangleTerrainTypes(types);
}
}
public void AddTriangle(Vector3 v1, Vector3 v2, Vector3 v4)
{
int vertexIndex = vertices.Count;
vertices.Add(HexMetric.Perturb(v1));
vertices.Add(HexMetric.Perturb(v2));
vertices.Add(HexMetric.Perturb(v4));
triangles.Add(vertexIndex);
triangles.Add(vertexIndex + 1);
triangles.Add(vertexIndex + 2);
}
void TriangulateWaterfallInWater(Vector3 v1, Vector3 v2, Vector3 v3, Vector3 v4, float y1, float y2, float waterY)
{
v1.y = v2.y = y1;
v3.y = v4.y = y2;
v1 = HexMetric.Perturb(v1);
v2 = HexMetric.Perturb(v2);
v3 = HexMetric.Perturb(v3);
v4 = HexMetric.Perturb(v4);
float t = (waterY - y2) / (y1 - y2);
v3 = Vector3.Lerp(v3, v1, t);
v4 = Vector3.Lerp(v4, v2, t);
rivers.AddQuadUnperturbed(v1, v2, v3, v4);
rivers.AddQuadUV(0f, 1f, 0.8f, 1f);
}
public void AddFeature(Vector3 position, HexCell cell)
{
HexHash hash = HexMetric.SampleHashGrid(position);
Transform prefab = PickPrefab(cell.UrbanLevel, 0, 0);
if (!prefab)
{
return;
}
Transform instance = Instantiate(prefab);
position.y += instance.localScale.y * 0.5f;
instance.localPosition = HexMetric.Perturb(position);
instance.localRotation = Quaternion.Euler(0f, 360f, 0f);
instance.SetParent(container, false);
}