/// <summary>
/// Compute the vertices of the mesh.
/// </summary>
private Vector3[] ComputeVertices(Mesh mesh)
{
var rows = heightMap.GetLength(0);
var columns = heightMap.GetLength(1);
// This mesh uses shared vertices for simplicity
var vertices = new Vector3[rows * columns];
for (var r = 0; r < rows; r++)
{
for (var c = 0; c < columns; c++)
{
var h = heightMap[r, c];
// Now assign the vertex depending on its row, column and
// height (vector in local space; row, column and height in
// grid space)
var gridVertex = new Vector3(c, h, -r);
var worldVertex = _grid.GridToWorld(gridVertex);
var localVertex = transform.InverseTransformPoint(worldVertex);
vertices[r * rows + c] = localVertex;
}
}
// Assign the vertices to the mesh
mesh.vertices = vertices;
return(vertices);
}
/// <summary>
/// Pick the next goal based on user input. The input if filtered
/// through a number for criteria.
/// </summary>
private void PickNext()
{
Vector3 direction; // Direction to move in (grid-coordinates)
var h = Input.GetAxisRaw("Horizontal");
var v = Input.GetAxisRaw("Vertical");
if (h > 0)
{
direction = Vector3.right;
}
else if (h < 0)
{
direction = Vector3.left;
}
else if (v > 0)
{
direction = Vector3.up;
}
else if (v < 0)
{
direction = Vector3.down;
}
else
{
return;
}
// We will be operating in grid space, so convert the position
_goal = _grid.WorldToGrid(transform.position) + direction;
// Check that the target is still inside the rendered region of the
// grid.
for (var i = 0; i < 2; ++i)
{
var beyondLower = _goal[i] < _renderer.From[i];
var beyondUpper = _goal[i] > _renderer.To[i];
if (beyondLower || beyondUpper)
{
Debug.Log("I can't swim.");
return;
}
}
// Check for walls
if (!ForbiddenTiles.CheckTile(_goal))
{
Debug.Log("Ouch!");
return;
}
_goal = _grid.GridToWorld(_goal);
_isMoving = true;
}
/// <summary>
/// Makes the object snap to the bottom of the grid, respecting the
/// grid's rotation.
/// </summary>
private Vector3 CalculateOffsetY()
{
//first store the objects position in grid coordinates
var gridPosition = _grid.WorldToGrid(transform.position);
//then change only the Y coordinate
gridPosition.y = .5f * transform.lossyScale.y;
//convert the result back to world coordinates
return(_grid.GridToWorld(gridPosition));
}
public static List <GameObject> GetColumnObjects(Vector3 pos)
{
List <GameObject> foundGOs = new List <GameObject>();
var sq = GetSquare(pos);
//Debug.Log("My Pos: " + sq[0] + " : " + sq[1]);
for (var j = levelMatrix.GetLength(1) - 1; j >= 0; --j)
{
//Debug.Log("EMPTY?: " + levelMatrix[sq[0], j]);
if (levelMatrix[sq[0], j] == false)
{
Vector3 gridPoint = SquareToGrid(new int[] { sq[0], j });
Vector3 worldPoint = _grid.GridToWorld(gridPoint);
//Debug.Log("worldPoint: " + worldPoint);
Collider2D col = Physics2D.OverlapPoint(new Vector2(worldPoint.x, worldPoint.y), LayerMask.GetMask("Default"));
if (col != null)
{
Debug.Log("col name: " + col.transform.name);
Box b = col.GetComponent <Box>();
if (col != null && b != null)
{
if (b.boxHealthState != BoxHealthState.Broken)
{
foundGOs.Add(col.gameObject);
Debug.Log("col: " + col.transform.name);
}
}
}
}
}
return(foundGOs);
}
/// <summary>
/// Calculates the movement constrains for a block that's being
/// dragged.
/// </summary>
/// <remarks>
/// <para>
/// When we want to slide a block we need to know how far we can go
/// before we "collide" (note that there is no actual Unity
/// collision detection involved anywhere). We can only look up to
/// on square ahead in each direction, so the bounds need to be
/// recalculated from time to time; this allows us to have
/// obstacles in all sorts of directions, like a maze that can
/// change all the time.
/// </para>
/// </remarks>
public static Vector3[] CalculateSlidingBounds(Vector3 pos, Vector3 scl)
{
// Break up the block and find the lower left and upper right
// square in the matrix.
var squares = BreakUpObstacle(pos, scl);
var squaresWidth = squares.GetLength(0);
var squaresHeight = squares.GetLength(1);
var lowerLeft = GetSquare(squares[0, 0]);
var upperRight = GetSquare(squares[squaresWidth - 1, squaresHeight - 1]);
var matrixWidth = levelMatrix.GetLength(0);
var matrixHeight = levelMatrix.GetLength(1);
int left = lowerLeft[0], bottom = lowerLeft[1], right = upperRight[0], top = upperRight[1];
// For each adjacent left square check if all left fields are free
// (a bitmask would have been the way to go instead of four bools,
// but let's keep it simple).
var freeEast = true;
//iterate over all the squares one square left of the left edge
for (var i = bottom; i <= top; ++i)
{
// use Min so we don't go off the matrix size.
var x = Mathf.Min(matrixWidth - 1, right + 1);
var y = i;
freeEast = freeEast && levelMatrix[x, y];
}
bool freeWest = true;
//iterate
for (var i = bottom; i <= top; ++i)
{
// Use the Max so we don't get negative values (the matrix
// starts at 0).
var x = Mathf.Max(0, left - 1);
var y = i;
freeWest = freeWest && levelMatrix[x, y];
}
var freeSouth = true;
for (var i = left; i <= right; ++i)
{
var x = i;
var y = Mathf.Max(0, bottom - 1);
freeSouth = freeSouth && levelMatrix[x, y];
}
var freeNorth = true;
for (var i = left; i <= right; ++i)
{
var x = i;
var y = Mathf.Min(matrixHeight - 1, top + 1);
freeNorth = freeNorth && levelMatrix[x, y];
}
// Now assume the block canot move anywhere; for each free
// direction loosen the constraints by one grid unit (world unit *
// spacing).
var bounds = new [] { pos, pos };
if (freeEast)
{
bounds[1] += _grid.Spacing.x * Vector3.right;
}
if (freeNorth)
{
bounds[1] += _grid.Spacing.y * Vector3.up;
}
if (freeWest)
{
bounds[0] -= _grid.Spacing.x * Vector3.right;
}
if (freeSouth)
{
bounds[0] -= _grid.Spacing.y * Vector3.up;
}
// the bounds can still be outside of the grid, so we need to clamp that as well
for (var i = 0; i < 2; i++)
{
for (var j = 0; j < 2; j++)
{
var to = _para.To;
var bound = bounds[i][j];
bounds[i][j] = Mathf.Clamp(bound, _grid.GridToWorld(Vector3.zero)[j] + 0.5f * scl[j], _grid.GridToWorld(to)[j] - 0.5f * scl[j]);
}
}
return(bounds);
}
