void AddTriangle(Vector3 v1, Vector3 v2, Vector3 v3)
{
int cnt = vertices.Count;
vertices.Add(HexMetrics.DisturbXZ(v1));
vertices.Add(HexMetrics.DisturbXZ(v2));
vertices.Add(HexMetrics.DisturbXZ(v3));
indices.Add(cnt);
indices.Add(cnt + 1);
indices.Add(cnt + 2);
}
//从上往下看，顺时针方向时法线朝上
void AddQuad(Vector3 v1, Vector3 v2, Vector3 v3, Vector3 v4)
{
int cnt = vertices.Count;
vertices.Add(HexMetrics.DisturbXZ(v1));
vertices.Add(HexMetrics.DisturbXZ(v2));
vertices.Add(HexMetrics.DisturbXZ(v3));
vertices.Add(HexMetrics.DisturbXZ(v4));
indices.Add(cnt);
indices.Add(cnt + 1);
indices.Add(cnt + 3);
indices.Add(cnt + 1);
indices.Add(cnt + 2);
indices.Add(cnt + 3);
}
void GenCornerTriangle_SSC(Vector3 low, HexCell lowCell, Vector3 left, HexCell leftCell, Vector3 right, HexCell rightCell)
{
Vector3 mid, mid_L, mid_R;
if (right.y < left.y)
{
mid = right;
mid_L = low;
mid_R = left;
}
else
{
mid = left;
mid_L = right;
mid_R = low;
}
Vector3 disturb_L = HexMetrics.DisturbXZ(mid_L);
Vector3 disturb_R = HexMetrics.DisturbXZ(mid_R);
Vector3 disturb_mid = HexMetrics.DisturbXZ(mid);
Vector3 junction = Vector3.Lerp(disturb_L, disturb_R, (disturb_L.y - disturb_mid.y) / (disturb_L.y - disturb_R.y));
Vector3 v1 = mid;
for (int i = 1; i <= HexMetrics.StepAmount; i++)
{
Vector3 v2 = HexMetrics.StepLerp(mid, mid_L, i);
AddTriangleUndisturbed(HexMetrics.DisturbXZ(v1), HexMetrics.DisturbXZ(v2), junction);
v1 = v2;
}
Vector3 v3 = mid;
for (int i = 1; i <= HexMetrics.StepAmount; i++)
{
Vector3 v4 = HexMetrics.StepLerp(mid, mid_R, i);
AddTriangleUndisturbed(HexMetrics.DisturbXZ(v4), HexMetrics.DisturbXZ(v3), junction);
v3 = v4;
}
}
//rightCell最高 Low left Right呈现顺时针方向
void GenCornerTriangle_SCCR(Vector3 low, HexCell lowCell, Vector3 left, HexCell leftCell, Vector3 right, HexCell rightCell)
{
BridgeType oppsite = HexMetrics.GetBridgeType(rightCell.Elevation, leftCell.Elevation);
Vector3 disturb_low = HexMetrics.DisturbXZ(low);
Vector3 disturb_left = HexMetrics.DisturbXZ(left);
Vector3 disturb_right = HexMetrics.DisturbXZ(right);
float t = (disturb_left - disturb_low).y / (disturb_right - disturb_low).y;
Vector3 junction = Vector3.Lerp(disturb_low, disturb_right, t);
if (oppsite == BridgeType.Slope)
{
AddTriangleUndisturbed(disturb_low, disturb_left, junction);
Vector3 v1 = left;
for (int i = 1; i <= HexMetrics.StepAmount; i++)
{
Vector3 v2 = HexMetrics.StepLerp(left, right, i);
AddTriangleUndisturbed(v1.DisturbXZ(), v2.DisturbXZ(), junction);
v1 = v2;
}
}
else
{
AddTriangleUndisturbed(disturb_left, disturb_right, junction);
Vector3 v1 = low;
for (int i = 1; i <= HexMetrics.StepAmount; i++)
{
Vector3 v2 = HexMetrics.StepLerp(low, left, i);
AddTriangleUndisturbed(v1.DisturbXZ(), v2.DisturbXZ(), junction);
v1 = v2;
}
}
}
public static Vector3 DisturbXZ(this Vector3 vec)
{
return(HexMetrics.DisturbXZ(vec));
}