public Cell(Map map, int x, int y, float left, float top)
{
this.Map = map;
this.Coord = new Point(x, y);
this.Location = new Vector2(left, top);
this.Neighbourghs = new Dictionary<int, Cell>();
this.Neighbourghs.Add(1,null);
this.Neighbourghs.Add(2,null);
this.Neighbourghs.Add(3,null);
this.Neighbourghs.Add(4,null);
this.Neighbourghs.Add(5,null);
this.Neighbourghs.Add(6,null);
this.Points = new Dictionary<int, int>();
this.Points.Add(1, -1);
this.Points.Add(2, -1);
this.Points.Add(3, -1);
this.Points.Add(4, -1);
this.Points.Add(5, -1);
this.Points.Add(6, -1);
}
private void InitializeMap()
{
Context.HeightMapRadius = 10f;
Map = new Map(32,32);
Map.CreateGrid();
Map.Cells[Map.Cells.Count / 2].Height = Map.R * 10;
Map.ElevateCell(Map.Cells[Map.Cells.Count / 2], 80f);
Map.Cells[Map.Cells.Count / 3].Height = -Map.R * 15;
Map.ElevateCell(Map.Cells[Map.Cells.Count / 2], 50f);
Map.Cells[Map.Cells.Count / 3].Height = -Map.R * 15;
Map.ElevateCell(Map.Cells[Map.Cells.Count / 3], 50f);
Map.CalcHeightPoint();
}
public static Vector3 NormalCell(Map map, Cell cell)
{
float? pickDistance = float.MaxValue;
float pickCurDistance = 0f;
float barycentricU = 0f;
float barycentricV = 0f;
Vector3 rayPosition = new Vector3(cell.Location,50f);
Vector3 normal = Vector3.UnitZ;
for (int i = 0; i < 4; i++)
{
bool intersect = RayIntersectTriangle(rayPosition, -Vector3.UnitZ,
map.Points[cell.Points[listTriangle[i][0]]],
map.Points[cell.Points[listTriangle[i][2]]],
map.Points[cell.Points[listTriangle[i][1]]],
ref pickCurDistance, ref barycentricU, ref barycentricV);
if (intersect && pickCurDistance < pickDistance)
{
pickDistance = pickCurDistance;
normal = NormalTriangle(
map.Points[cell.Points[listTriangle[i][0]]],
map.Points[cell.Points[listTriangle[i][1]]],
map.Points[cell.Points[listTriangle[i][2]]]);
}
}
return normal;
}
public static float? RayIntersectCell(Vector3 rayPosition, Vector3 rayDirection, Map map, Cell cell)
{
float? pickDistance = float.MaxValue;
float pickCurDistance = 0f;
float barycentricU = 0f;
float barycentricV = 0f;
for (int i = 0; i < 4; i++)
{
bool intersect = RayIntersectTriangle(rayPosition, rayDirection,
map.Points[cell.Points[listTriangle[i][0]]],
map.Points[cell.Points[listTriangle[i][2]]],
map.Points[cell.Points[listTriangle[i][1]]],
ref pickCurDistance, ref barycentricU, ref barycentricV);
if (intersect && pickCurDistance < pickDistance)
{
pickDistance = pickCurDistance;
}
}
if (pickDistance == float.MaxValue)
return null;
else
return pickDistance;
}