diff options
| -rw-r--r-- | core/src/ch/asynk/tankontank/actors/HexMap.java | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/core/src/ch/asynk/tankontank/actors/HexMap.java b/core/src/ch/asynk/tankontank/actors/HexMap.java new file mode 100644 index 0000000..559aeef --- /dev/null +++ b/core/src/ch/asynk/tankontank/actors/HexMap.java @@ -0,0 +1,79 @@ +package ch.asynk.tankontank.actors; + +import com.badlogic.gdx.graphics.Texture; +import com.badlogic.gdx.scenes.scene2d.ui.Image; + +import com.badlogic.gdx.math.Vector2; + +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; + public Vector2 cell = new Vector2(); + + public HexMap(int cols, int rows, Texture texture) + { + super(texture); + this.cols = cols; + this.rows = rows; + } + + public void selectCell(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); + } +} |