public Vector2 EstTileAtPosWithScroll(Vector2 pos)
{
pos *= new Vector2(FSOEnvironment.DPIScaleFactor);
var sPos = new Vector3(pos, 0);
var p1 = State.Device.Viewport.Unproject(sPos, State.Camera.Projection, State.Camera.View, Matrix.Identity);
sPos.Z = 1;
var p2 = State.Device.Viewport.Unproject(sPos, State.Camera.Projection, State.Camera.View, Matrix.Identity);
var dir = p2 - p1;
dir.Normalize();
var ray = new Ray(p1, p2 - p1);
ray.Direction.Normalize();
ray.Position -= new Vector3(0, (State.Level - 1) * 2.95f * 3, 0);
var baseBox = new BoundingBox(new Vector3(0, -5000, 0), new Vector3(Blueprint.Width * 3, 5000, Blueprint.Height * 3));
if (baseBox.Contains(ray.Position) != ContainmentType.Contains)
{
//move ray start inside box
var i = baseBox.Intersects(ray);
if (i != null)
{
ray.Position += ray.Direction * (i.Value + 0.01f);
}
}
var mx = (int)ray.Position.X / 3;
var my = (int)ray.Position.Z / 3;
var px = (ray.Direction.X > 0);
var py = (ray.Direction.Z > 0);
int iteration = 0;
while (mx >= 0 && mx < Blueprint.Width && my >= 0 && my < Blueprint.Width)
{
//test triangle 1. (centre of tile down xz, we lean towards positive x)
var plane = new Plane(
new Vector3(mx * 3, Blueprint.GetAltPoint(mx, my) * Blueprint.TerrainFactor * 3, my * 3),
new Vector3(mx * 3 + 3, Blueprint.GetAltPoint(mx + 1, my) * Blueprint.TerrainFactor * 3, my * 3),
new Vector3(mx * 3 + 3, Blueprint.GetAltPoint(mx + 1, my + 1) * Blueprint.TerrainFactor * 3, my * 3 + 3)
);
var tBounds = new BoundingBox(new Vector3(mx * 3, -5000, my * 3), new Vector3(mx * 3 + 3, 5000, my * 3 + 3));
var t1 = ray.Intersects(plane);
var t2 = BoxRC2(ray, 3);
//var t2 = BoxRC(ray, tBounds);
if (plane.DotCoordinate(ray.Position) > 0)
{
t1 = 0;
}
if (t1 != null && t2 != null && t1.Value < t2.Value)
{
//hit the ground...
var tentative = ray.Position + ray.Direction * (t1.Value + 0.00001f);
//did it hit the correct side of the triangle?
var mySide = ((tentative.X / 3) % 1) - ((tentative.Z / 3) % 1);
if (mySide >= 0)
{
return(new Vector2(tentative.X / 3, tentative.Z / 3));
}
else
{
//test the other side (positive z)
plane = new Plane(
new Vector3(mx * 3, Blueprint.GetAltPoint(mx, my) * Blueprint.TerrainFactor * 3, my * 3),
new Vector3(mx * 3, Blueprint.GetAltPoint(mx, my + 1) * Blueprint.TerrainFactor * 3, my * 3 + 3),
new Vector3(mx * 3 + 3, Blueprint.GetAltPoint(mx + 1, my + 1) * Blueprint.TerrainFactor * 3, my * 3 + 3)
);
t1 = ray.Intersects(plane);
if (t1 != null && t2 != null && t1.Value < t2.Value)
{
//hit the other side
tentative = ray.Position + ray.Direction * (t1.Value + 0.00001f);
return(new Vector2(tentative.X / 3, tentative.Z / 3));
}
}
}
if (t2 == null)
{
break;
}
ray.Position += ray.Direction * (t2.Value + 0.00001f);
mx = (!px) ? ((int)Math.Ceiling(ray.Position.X / 3) - 1) :
(int)(ray.Position.X / 3);
my = (!py) ? ((int)Math.Ceiling(ray.Position.Z / 3) - 1) :
(int)(ray.Position.Z / 3);
if (iteration++ > 1000)
{
break;
}
}
//fall back to base positioning
var bplane = new Plane(new Vector3(0, 0, 0), new Vector3(Blueprint.Width * 3, 0, 0), new Vector3(0, 0, Blueprint.Height * 3));
var cast = ray.Intersects(bplane);
if (cast != null)
{
ray.Position += ray.Direction * (cast.Value + 0.01f);
return(new Vector2(ray.Position.X / 3, ray.Position.Z / 3));
}
return(new Vector2(0, 0));
}
public Vector2 EstTileAtPosWithScroll(Vector2 pos, sbyte level = -1)
{
if (level == -1)
{
level = State.Level;
}
var ray = State.CameraRayAtScreenPos(pos, level);
var baseBox = new BoundingBox(new Vector3(0, -5000, 0), new Vector3(Blueprint.Width * 3, 5000, Blueprint.Height * 3));
if (baseBox.Contains(ray.Position) != ContainmentType.Contains)
{
//move ray start inside box
var i = baseBox.Intersects(ray);
if (i != null)
{
ray.Position += ray.Direction * (i.Value + 0.01f);
}
}
var mx = (int)ray.Position.X / 3;
var my = (int)ray.Position.Z / 3;
var px = (ray.Direction.X > 0);
var py = (ray.Direction.Z > 0);
var canProj = Blueprint?.Altitude != null;
int iteration = 0;
while (mx >= 0 && mx < Blueprint.Width && my >= 0 && my < Blueprint.Width && canProj)
{
//test triangle 1. (centre of tile down xz, we lean towards positive x)
var plane = new Plane(
new Vector3(mx * 3, Blueprint.GetAltPoint(mx, my) * Blueprint.TerrainFactor * 3, my * 3),
new Vector3(mx * 3 + 3, Blueprint.GetAltPoint(mx + 1, my) * Blueprint.TerrainFactor * 3, my * 3),
new Vector3(mx * 3 + 3, Blueprint.GetAltPoint(mx + 1, my + 1) * Blueprint.TerrainFactor * 3, my * 3 + 3)
);
var tBounds = new BoundingBox(new Vector3(mx * 3, -5000, my * 3), new Vector3(mx * 3 + 3, 5000, my * 3 + 3));
var t1 = ray.Intersects(plane);
var t2 = BoxRC2(ray, 3);
//var t2 = BoxRC(ray, tBounds);
if (plane.DotCoordinate(ray.Position) > 0)
{
t1 = 0;
}
if (t1 != null && t2 != null && t1.Value < t2.Value)
{
//hit the ground...
var tentative = ray.Position + ray.Direction * (t1.Value + 0.00001f);
//did it hit the correct side of the triangle?
var mySide = ((tentative.X / 3) % 1) - ((tentative.Z / 3) % 1);
if (mySide >= 0)
{
return(new Vector2(tentative.X / 3, tentative.Z / 3));
}
else
{
//test the other side (positive z)
plane = new Plane(
new Vector3(mx * 3, Blueprint.GetAltPoint(mx, my) * Blueprint.TerrainFactor * 3, my * 3),
new Vector3(mx * 3, Blueprint.GetAltPoint(mx, my + 1) * Blueprint.TerrainFactor * 3, my * 3 + 3),
new Vector3(mx * 3 + 3, Blueprint.GetAltPoint(mx + 1, my + 1) * Blueprint.TerrainFactor * 3, my * 3 + 3)
);
t1 = ray.Intersects(plane);
if (t1 != null && t2 != null && t1.Value < t2.Value)
{
//hit the other side
tentative = ray.Position + ray.Direction * (t1.Value + 0.00001f);
return(new Vector2(tentative.X / 3, tentative.Z / 3));
}
}
}
if (t2 == null)
{
break;
}
ray.Position += ray.Direction * (t2.Value + 0.00001f);
mx = (!px) ? ((int)Math.Ceiling(ray.Position.X / 3) - 1) :
(int)(ray.Position.X / 3);
my = (!py) ? ((int)Math.Ceiling(ray.Position.Z / 3) - 1) :
(int)(ray.Position.Z / 3);
if (iteration++ > 1000)
{
break;
}
}
//fall back to base positioning
var bplane = new Plane(new Vector3(0, 0, 0), new Vector3(Blueprint.Width * 3, 0, 0), new Vector3(0, 0, Blueprint.Height * 3));
var cast = ray.Intersects(bplane);
if (cast != null)
{
ray.Position += ray.Direction * (cast.Value + 0.01f);
return(new Vector2(ray.Position.X / 3, ray.Position.Z / 3));
}
return(new Vector2(0, 0));
}