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package ch.asynk.tankontank.game;
import java.util.ArrayDeque;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.scenes.scene2d.ui.Image;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.GridPoint2;
import com.badlogic.gdx.math.GridPoint3;
public class HexMap extends Image
{
static final int x0 = 83; // map offset
static final int y0 = 182; // map offset
static final int h = 110; // hex side
static final float dh = 53.6f; // hex top should be h/2
static final int w = 189; // hex width
static final int dw = 94; // half hex should be w/2
static final float H = h + dh; // total height
static final float slope = (dh / (float) dw);
private int cols;
private int rows;
private ArrayDeque<Pawn>[][] cells;
@SuppressWarnings("unchecked")
public HexMap(int cols, int rows, Texture texture)
{
super(texture);
cells = new ArrayDeque[rows][];
for (int i = 0; i < rows; i++) {
if ((i % 2) == 1) cells[i] = new ArrayDeque[cols - 1];
else cells[i] = new ArrayDeque[cols];
}
this.cols = cols - 1;
this.rows = rows - 1;
}
public Pawn getTopPawnAt(GridPoint2 cell)
{
return getTopPawnAt(cell.x, cell.y);
}
private Pawn getTopPawnAt(int col, int row)
{
if ((col < 0) || (row < 0)) return null;
ArrayDeque<Pawn> st = cells[row][col];
if ((st == null) || (st.size() == 0)) return null;
return st.getFirst();
}
public void setImageCenterAt(Image image, GridPoint2 cell)
{
float x = x0 + ((cell.x * w) + (w / 2));
float y = y0 + ((cell.y * H) + (h / 2));
if ((cell.y % 2) == 1) x += dw;
image.setCenterPosition(x, y);
}
// public Vector2 getPawnPosAt(Pawn pawn, GridPoint2 cell)
// {
// return getPawnPosAt(pawn, cell.x, cell.y);
// }
public Vector2 getPawnPosAt(Pawn pawn, GridPoint3 cell)
{
return getPawnPosAt(pawn, cell.x, cell.y);
}
private Vector2 getPawnPosAt(Pawn pawn, int col, int row)
{
float x = x0 + ((col * w) + ((w - pawn.getHeight()) / 2));
float y = y0 + ((row * H) + ((h - pawn.getWidth()) / 2));
if ((row % 2) == 1) x += dw;
return new Vector2(x, y);
}
private void removePawnFrom(Pawn pawn, int col, int row)
{
if ((col> 0) && (row > 0)) {
ArrayDeque<Pawn> st = cells[row][col];
if ((st == null) || (st.size() == 0))
Gdx.app.error("GameScreen", "remove pawn from " + col + ";" + row + " but pawn stack is empty");
else
st.remove(pawn);
}
}
public void setPawnOn(Pawn pawn, GridPoint3 cell)
{
setPawnOn(pawn, cell.x, cell.y, cell.z);
}
private void setPawnOn(Pawn pawn, int col, int row, int angle)
{
GridPoint3 prev = pawn.getHex();
if (prev != null) removePawnFrom(pawn, prev.x, prev.y);
Vector2 pos = getPawnPosAt(pawn, col, row);
pawn.setPosition(pos.x, pos.y);
pawn.setRotation(angle);
ArrayDeque<Pawn> st = cells[row][col];
if (st == null) st = cells[row][col] = new ArrayDeque<Pawn>();
st.push(pawn);
pawn.setZIndex(st.size());
}
public GridPoint2 getCellAt(GridPoint2 cell, float cx, float cy)
{
// compute row
int row;
boolean oddRow = true;
float y = (cy - y0);
if (y < 0.f) {
row = -1;
} else {
row = (int) (y / H);
oddRow = ((row % 2) == 1);
}
// compute col
int col;
float x = (cx - x0);
if (oddRow) x -= dw;
if (x < 0.f) {
col = -1;
} else {
col = (int) (x / w);
}
// check upper boundaries
float dy = (y - (row * H));
if (dy > h) {
dy -= h;
float dx = (x - (col * w));
if (dx < dw) {
if ((dx * slope) < dy) {
row += 1;
if (!oddRow) col -= 1;
oddRow = !oddRow;
}
} else {
if (((w - dx) * slope) < dy) {
row += 1;
if (oddRow) col += 1;
oddRow = !oddRow;
}
}
}
// validate cell
if ((col < 0) || (row < 0) || (row > rows) || (col > cols) || (oddRow && ((col +1)> cols)))
cell.set(-1, -1);
else
cell.set(col, row);
return cell;
}
}
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