private void TriangulateBoundaryTriangle(
Vector3 begin, Color beginWeights,
Vector3 left, Color leftWeights,
Vector3 boundary, Color boundaryWeights, Vector3 indices
)
{
Vector3 v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, 1));
Color w2 = HexMetrics.TerraceLerp(beginWeights, leftWeights, 1);
terrain.AddTriangleUnperturbed(HexMetrics.Perturb(begin), v2, boundary);
terrain.AddTriangleCellData(indices, beginWeights, w2, boundaryWeights);
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
Vector3 v1 = v2;
Color w1 = w2;
v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, i));
w2 = HexMetrics.TerraceLerp(beginWeights, leftWeights, i);
terrain.AddTriangleUnperturbed(v1, v2, boundary);
terrain.AddTriangleCellData(indices, w1, w2, boundaryWeights);
}
terrain.AddTriangleUnperturbed(v2, HexMetrics.Perturb(left), boundary);
terrain.AddTriangleCellData(indices, w2, leftWeights, boundaryWeights);
}
/// <summary>
/// Handle corner triangle terraces(cliff-slop cases)
/// </summary>
/// <param name="begin">begin point of triangle</params>
/// <param name="beginCell">begin hex cell</param>
/// <param name="left">left point of triangle</param>
/// <param name="leftCell">left hex cell</param>
/// <param name="right">right point of triangle</param>
/// <param name="rightCell">right hex cell</param>
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(HexMetrics.Perturb(begin), HexMetrics.Perturb(left), b);
Color boundaryWeights = Color.Lerp(weights1, weights2, b);
Vector3 indices;
indices.x = beginCell.Index;
indices.y = leftCell.Index;
indices.z = rightCell.Index;
TriangulateBoundaryTriangle(right, weights3, begin, weights1, boundary, boundaryWeights, indices);
if (leftCell.GetEdgeType(rightCell) == HexEdgeType.Slope)
{
TriangulateBoundaryTriangle(left, weights2, right, weights3, boundary, boundaryWeights, indices);
}
else
{
terrain.AddTriangleUnperturbed(HexMetrics.Perturb(left), HexMetrics.Perturb(right), boundary);
terrain.AddTriangleCellData(indices, weights2, weights3, boundaryWeights);
}
}
public void AddSpecialFeature(HexCell cell, Vector3 position)
{
Transform instance = Instantiate(special[cell.SpecialIndex - 1]);
instance.localPosition = HexMetrics.Perturb(position);
HexHash hash = HexMetrics.SampleHashGrid(position);
instance.localRotation = Quaternion.Euler(0f, 360f * hash.e, 0f);
instance.SetParent(container, false);
}
public void AddTriangle(Vector3 v1, Vector3 v2, Vector3 v3)
{
int vertexIndex = vertices.Count;
vertices.Add(HexMetrics.Perturb(v1));
vertices.Add(HexMetrics.Perturb(v2));
vertices.Add(HexMetrics.Perturb(v3));
triangles.Add(vertexIndex);
triangles.Add(vertexIndex + 1);
triangles.Add(vertexIndex + 2);
}
public void AddBridge(Vector3 roadCenter1, Vector3 roadCenter2)
{
Transform instance = Instantiate(bridge);
roadCenter1 = HexMetrics.Perturb(roadCenter1);
roadCenter2 = HexMetrics.Perturb(roadCenter2);
instance.localPosition = (roadCenter1 + roadCenter2) * 0.5f;
instance.forward = roadCenter2 - roadCenter1;
float length = Vector3.Distance(roadCenter1, roadCenter2);
instance.localScale = new Vector3(1f, 1f, length * (1f / HexMetrics.bridgeDesignLength));
instance.SetParent(container, false);
}
public void AddFeature(HexCell cell, Vector3 position)
{
if (cell.IsSpecial)
{
return;
}
HexHash hash = HexMetrics.SampleHashGrid(position);
Transform prefab = PickPrefab(urbanCollections, cell.UrbanLevel, hash.a, hash.d);
Transform otherPrefab = PickPrefab(farmCollections, cell.FarmLevel, hash.b, hash.d);
float usedHash = hash.a;
if (prefab)
{
if (otherPrefab && hash.b < hash.a)
{
prefab = otherPrefab;
usedHash = hash.b;
}
}
else if (otherPrefab)
{
prefab = otherPrefab;
usedHash = hash.b;
}
otherPrefab = PickPrefab(plantCollections, cell.PlantLevel, hash.c, hash.d);
if (prefab)
{
if (otherPrefab && hash.c < usedHash)
{
prefab = otherPrefab;
}
}
else if (otherPrefab)
{
prefab = otherPrefab;
}
else
{
return;
}
Transform instance = Instantiate(prefab);
position.y += instance.localScale.y * 0.5f;
instance.localPosition = HexMetrics.Perturb(position);
instance.localRotation = Quaternion.Euler(0f, 360f * hash.e, 0f);
instance.SetParent(container, false);
}
private void AddWallCap(Vector3 near, Vector3 far)
{
near = HexMetrics.Perturb(near);
far = HexMetrics.Perturb(far);
Vector3 center = HexMetrics.WallLerp(near, far);
Vector3 thickness = HexMetrics.WallThicknessOffset(near, far);
Vector3 v1, v2, v3, v4;
v1 = v3 = center - thickness;
v2 = v4 = center + thickness;
v3.y = v4.y = center.y + HexMetrics.wallHeight;
walls.AddQuadUnperturbed(v1, v2, v3, v4);
}
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 = HexMetrics.Perturb(v1);
v2 = HexMetrics.Perturb(v2);
v3 = HexMetrics.Perturb(v3);
v4 = HexMetrics.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);
}
void AddWallSegment(Vector3 nearLeft, Vector3 farLeft, Vector3 nearRight, Vector3 farRight, bool addTower = false)
{
nearLeft = HexMetrics.Perturb(nearLeft);
farLeft = HexMetrics.Perturb(farLeft);
nearRight = HexMetrics.Perturb(nearRight);
farRight = HexMetrics.Perturb(farRight);
Vector3 left = HexMetrics.WallLerp(nearLeft, farLeft);
Vector3 right = HexMetrics.WallLerp(nearRight, farRight);
Vector3 leftThicknessOffset = HexMetrics.WallThicknessOffset(nearLeft, farLeft);
Vector3 rightThicknessOffset = HexMetrics.WallThicknessOffset(nearRight, farRight);
float leftTop = left.y + HexMetrics.wallHeight;
float rightTop = right.y + HexMetrics.wallHeight;
// One side
Vector3 v1, v2, v3, v4;
v1 = v3 = left - leftThicknessOffset;
v2 = v4 = right - rightThicknessOffset;
v3.y = leftTop;
v4.y = rightTop;
walls.AddQuadUnperturbed(v1, v2, v3, v4);
Vector3 t1 = v3, t2 = v4;
// The other side
v1 = v3 = left + leftThicknessOffset;
v2 = v4 = right + rightThicknessOffset;
v3.y = leftTop;
v4.y = rightTop;
walls.AddQuadUnperturbed(v2, v1, v4, v3);
// The top
walls.AddQuadUnperturbed(t1, t2, v3, v4);
if (addTower)
{
Transform towerInstance = Instantiate(wallTower);
towerInstance.transform.localPosition = (left + right) * 0.5f;
Vector3 rightDirection = right - left;
rightDirection.y = 0f;
towerInstance.transform.right = rightDirection;
towerInstance.SetParent(container, false);
}
}
private void AddWallWedge(Vector3 near, Vector3 far, Vector3 point)
{
near = HexMetrics.Perturb(near);
far = HexMetrics.Perturb(far);
point = HexMetrics.Perturb(point);
Vector3 center = HexMetrics.WallLerp(near, far);
Vector3 thickness = HexMetrics.WallThicknessOffset(near, far);
Vector3 v1, v2, v3, v4;
Vector3 pointTop = point;
point.y = center.y;
v1 = v3 = center - thickness;
v2 = v4 = center + thickness;
v3.y = v4.y = pointTop.y = center.y + HexMetrics.wallHeight;
walls.AddQuadUnperturbed(v1, point, v3, pointTop);
walls.AddQuadUnperturbed(point, v2, pointTop, v4);
walls.AddTriangleUnperturbed(pointTop, v3, v4);
}
// Triangulate a corner with half terraces, half flat - Cliff on the left
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(HexMetrics.Perturb(begin), HexMetrics.Perturb(left), b); // boundary is on a pertubed slope
Color boundaryColor = Color.Lerp(beginCell.Color, leftCell.Color, b);
TriangulateBoundaryTriangle(right, rightCell, begin, beginCell, boundary, boundaryColor);
if (leftCell.GetEdgeType(rightCell) == HexEdgeType.Slope)
{
TriangulateBoundaryTriangle(left, leftCell, right, rightCell, boundary, boundaryColor);
}
else
{
terrain.AddTriangleUnpertubed(HexMetrics.Perturb(left), HexMetrics.Perturb(right), boundary);
terrain.AddTriangleColor(leftCell.Color, rightCell.Color, boundaryColor);
}
}
// Make a terrace in a corner, each terrace end in the boundary
void TriangulateBoundaryTriangle(Vector3 begin, HexCell beginCell, Vector3 left, HexCell leftCell, Vector3 boundary, Color boundaryColor)
{
Vector3 v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, 1));
Color c2 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, 1);
// The first step is a triangle
terrain.AddTriangleUnpertubed(HexMetrics.Perturb(begin), v2, boundary);
terrain.AddTriangleColor(beginCell.Color, c2, boundaryColor);
// All the steps are triangles
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
Vector3 v1 = v2;
Color c1 = c2;
v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, i));
c2 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, i);
terrain.AddTriangleUnpertubed(v1, v2, boundary);
terrain.AddTriangleColor(c1, c2, boundaryColor);
}
// The last step is a triangle
terrain.AddTriangleUnpertubed(v2, HexMetrics.Perturb(left), boundary);
terrain.AddTriangleColor(c2, leftCell.Color, boundaryColor);
}
