public Vector3?Raycast(Ray ray)
{
var corners = GetCorners();
for (int i = 0; i < corners.Count; i++)
{
var v1 = corners[i];
var v2 = corners[(i + 1) % corners.Count];
if (Intersections.LineTriangleIntersection(ray, v1, v2, CenterPoint, out var intersectionPoint) == 1)
{
return(intersectionPoint);
}
}
return(null);
}
public Vector3?GetRayMapIntersection(Ray ray)
{
var from = new Vector2(ray.origin.x, ray.origin.z);
var to = new Vector2(ray.GetPoint(1000).x, ray.GetPoint(1000).z);
var blocks = Rasterization.DDA(from, to, true);
foreach (var blockPos in blocks)
{
if (_settings.LandBounds.Contains(blockPos))
{
var chunkPosition = Chunk.GetPosition(blockPos);
Chunk chunk;
if (Map.TryGetValue(chunkPosition, out chunk))
{
var localPos = Chunk.GetLocalPosition(blockPos);
var tr1 = new Vector3(blockPos.X, chunk.HeightMap[localPos.X, localPos.Z], blockPos.Z);
var tr2 = new Vector3(blockPos.X + 1, chunk.HeightMap[localPos.X + 1, localPos.Z], blockPos.Z);
var tr3 = new Vector3(blockPos.X, chunk.HeightMap[localPos.X, localPos.Z + 1], blockPos.Z + 1);
var tr4 = new Vector3(blockPos.X + 1, chunk.HeightMap[localPos.X + 1, localPos.Z + 1], blockPos.Z + 1);
Vector3 i;
var ir = Intersections.LineTriangleIntersection(ray, tr1, tr2, tr3, out i);
if (ir == 1)
{
return(i);
}
else
{
ir = Intersections.LineTriangleIntersection(ray, tr2, tr3, tr4, out i);
if (ir == 1)
{
return(i);
}
}
}
}
}
return(null);
}