tabletop -> boardgame

4 files changed, 325 insertions, 0 deletions

diff --git a/core/src/ch/asynk/gdx/boardgame/board/BoardFactory.java b/core/src/ch/asynk/gdx/boardgame/board/BoardFactory.java
new file mode 100644
index 0000000..8dc73b6
--- /dev/null
+++ b/core/src/ch/asynk/gdx/boardgame/board/BoardFactory.java
@@ -0,0 +1,42 @@
+package ch.asynk.gdx.boardgame.board;
+
+import ch.asynk.gdx.boardgame.Board;
+
+public class BoardFactory
+{
+    public enum BoardType
+    {
+        HEX, SQUARE, TRIANGLE
+    }
+
+    public enum BoardOrientation
+    {
+        VERTICAL,
+        HORIZONTAL,
+    }
+
+    public static Board getBoard(BoardType boardType, float side)
+    {
+        return getBoard(boardType, side, 0f, 0f, BoardOrientation.VERTICAL);
+    }
+
+    public static Board getBoard(BoardType boardType, float side, float x0, float y0)
+    {
+        return getBoard(boardType, side, x0, y0, BoardOrientation.VERTICAL);
+    }
+
+    public static Board getBoard(BoardType boardType, float side, float x0, float y0, BoardOrientation boardOrientation)
+    {
+        switch(boardType)
+        {
+            case HEX:
+                return new HexBoard(side, x0, y0, boardOrientation);
+            case SQUARE:
+                return new SquareBoard(side, x0, y0);
+            case TRIANGLE:
+                return new TriangleBoard(side, x0, y0, boardOrientation);
+            default:
+                throw new RuntimeException( String.format("%s board type is not implemented yet.", boardType) );
+        }
+    }
+}
diff --git a/core/src/ch/asynk/gdx/boardgame/board/HexBoard.java b/core/src/ch/asynk/gdx/boardgame/board/HexBoard.java
new file mode 100644
index 0000000..d5b2a26
--- /dev/null
+++ b/core/src/ch/asynk/gdx/boardgame/board/HexBoard.java
@@ -0,0 +1,136 @@
+package ch.asynk.gdx.boardgame.board;
+
+import com.badlogic.gdx.math.Vector2;
+
+import ch.asynk.gdx.boardgame.Board;
+
+public class HexBoard implements Board
+{
+    private final float side;   // length of the side of the hex
+    private final float x0;     // bottom left x offset
+    private final float y0;     // bottom left y offset
+    private final BoardFactory.BoardOrientation orientation;
+
+    private final float w;      // side to side orthogonal distance
+    private final float dw;     // half hex : w/2
+    private final float dh;     // hex top : s/2
+    private final float h;      // square height : s + dh
+    private final float slope;  // dh / dw
+
+    //  BoardOrientation.VERTICAL : 2 vertical sides : 2 vertices pointing up and down
+    //  coordinates
+    //  \
+    //   \___
+    //   cols are horizontal
+    //   rows are at -120°
+    //   bottom left is the bottom vertice of the most bottom-left vertical hex side of the map
+    //
+    //  BoardOrientation.HORIZONTAL : 2 horizontal sides : 2 vertices pointing left and right
+    //  coordinates
+    //  |
+    //  |
+    //   \
+    //    \
+    //   cols are at +120°
+    //   rows are vertical°
+    //   bottom left is the left vertice of the most bottom-left horizontal hex side of the map
+
+    public HexBoard(float side, float x0, float y0, BoardFactory.BoardOrientation boardOrientation)
+    {
+        this.side = side;
+        this.x0 = x0;
+        this.y0 = y0;
+        this.orientation = boardOrientation;
+
+        this.w  = side * 1.73205f;
+        this.dw = w / 2.0f;
+        this.dh = side / 2.0f;
+        this.h  = side + dh;
+        this.slope = dh / dw;
+    }
+
+    @Override public void centerOf(int x, int y, Vector2 v)
+    {
+        float cx = this.x0;
+        float cy = this.y0;
+
+        if (this.orientation == BoardFactory.BoardOrientation.VERTICAL) {
+            cx += (this.dw + (x * this.w) - (y * this.dw));
+            cy += (this.dh + (y * this.h));
+        } else {
+            cx += (this.dh + (x * this.h));
+            cy += (this.dw + (y * this.w) - (x * this.dw));
+        }
+
+        v.set(cx, cy);
+    }
+
+    @Override public void toBoard(float x, float y, Vector2 v)
+    {
+        int col = -1;
+        int row = -1;
+
+        if (this.orientation == BoardFactory.BoardOrientation.VERTICAL) {
+            // compute row
+            float dy = y - this.y0;
+            row = (int) (dy / this.h);
+            if (dy < 0f) row -= 1;
+
+            // compute col
+            float dx = x - this.x0 + (row * this.dw);
+            col = (int) (dx / this.w);
+            if (dx < 0f) col -= 1;
+
+            // upper rectangle or hex body
+            if (dy > ((row * this.h) + this.side)) {
+                dy -= ((row * this.h) + this.side);
+                dx -= (col * this.w);
+                // upper left or right rectangle
+                if (dx < this.dw) {
+                    if (dy > (dx * this.slope)) {
+                        // upper left hex
+                        row += 1;
+                    }
+                } else {
+                    // if (dy > ((2 * this.dh) - (dx * this.slope))) {
+                    if (dy > ((this.w - dx) * this.slope)) {
+                        // upper right hex
+                        row += 1;
+                        col += 1;
+                    }
+                }
+            }
+        } else {
+            // compute col
+            float dx = x - this.x0;
+            col = (int) (dx / this.h);
+            if (dx < 0f) col -= 1;
+
+            // compute row
+            float dy = y - this.y0 + (col * this.dw);
+            row = (int) (dy / this.w);
+            if (dy < 0f) row -= 1;
+
+            // right rectangle or hex body
+            if (dx > ((col * this.h) + this.side)) {
+                dx -= ((col * this.h) + this.side);
+                dy -= (row * this.w);
+                // upper or lower rectangle
+                if (dy > ((this.dw - dx) / this.slope)) {
+                    if (dy > ((2 * this.dw) - (dx / this.slope))) {
+                        // upper right hex
+                        col += 1;
+                        row += 1;
+                    }
+                } else {
+                    if (dy < (dx / this.slope)) {
+                        // lower right hex
+                        col += 1;
+                    }
+                }
+            }
+        }
+
+        v.set(col, row);
+    }
+}
diff --git a/core/src/ch/asynk/gdx/boardgame/board/SquareBoard.java b/core/src/ch/asynk/gdx/boardgame/board/SquareBoard.java
new file mode 100644
index 0000000..de2ab4c
--- /dev/null
+++ b/core/src/ch/asynk/gdx/boardgame/board/SquareBoard.java
@@ -0,0 +1,39 @@
+package ch.asynk.gdx.boardgame.board;
+
+import com.badlogic.gdx.math.Vector2;
+
+import ch.asynk.gdx.boardgame.Board;
+
+public class SquareBoard implements Board
+{
+    private final float side;   // length of the side of a square
+    private final float x0;     // bottom left x offset
+    private final float y0;     // bottom left y offset
+
+    public SquareBoard(float side, float x0, float y0)
+    {
+        this.side = side;
+        this.x0 = x0;
+        this.y0 = y0;
+    }
+
+    @Override public void centerOf(int x, int y, Vector2 v)
+    {
+        float cx = this.x0 + (this.side / 2) + (this.side * x);
+        float cy = this.y0 + (this.side / 2) + (this.side * y);
+
+        v.set(cx, cy);
+    }
+
+    @Override public void toBoard(float x, float y, Vector2 v)
+    {
+        float dx = x - this.x0;
+        float dy = y - this.y0;
+        int col = (int) (dx / this.side);
+        int row = (int) (dy / this.side);
+        if (dx < 0) col -=1;
+        if (dy < 0) row -=1;
+
+        v.set(col, row);
+    }
+}
diff --git a/core/src/ch/asynk/gdx/boardgame/board/TriangleBoard.java b/core/src/ch/asynk/gdx/boardgame/board/TriangleBoard.java
new file mode 100644
index 0000000..e3c9434
--- /dev/null
+++ b/core/src/ch/asynk/gdx/boardgame/board/TriangleBoard.java
@@ -0,0 +1,108 @@
+package ch.asynk.gdx.boardgame.board;
+
+import com.badlogic.gdx.math.Vector2;
+
+import ch.asynk.gdx.boardgame.Board;
+
+public class TriangleBoard implements Board
+{
+    private final float side;   // length of the side of the equilateral triangle
+    private final float x0;     // bottom left x offset
+    private final float y0;     // bottom left y offset
+    private final BoardFactory.BoardOrientation orientation;
+
+    private final float d;      // side / 2
+    private final float h;      // height of the triangle
+    private final float m;      // h / d
+    private final float h13;    // 1/3 height of the triangle
+    private final float h23;    // 2/3 height of the triangle
+    private final float h43;    // 4/3 height of the triangle
+
+    public TriangleBoard(float side, float x0, float y0, BoardFactory.BoardOrientation boardOrientation)
+    {
+        this.side = side;
+        this.x0 = x0;
+        this.y0 = y0;
+        this.orientation = boardOrientation;
+
+        this.d = side / 2f;
+        this.h = side * 0.866f;
+        this.m = this.h / this.d;
+        this.h13 = this.h * 0.33333f;
+        this.h23 = this.h * 0.66666f;
+        this.h43 = this.h * 1.33333f;
+    }
+
+    @Override public void centerOf(int x, int y, Vector2 v)
+    {
+        float cx = this.x0;
+        float cy = this.y0;
+
+        if (this.orientation == BoardFactory.BoardOrientation.VERTICAL) {
+            cy += (y * this.d);
+            cx += ((x * this.h) + (((x + y) % 2 == 0) ? this.h23 : this.h13));
+        } else {
+            cx += (this.d + (x * this.d));
+            cy += ((y * this.h) + (((x + y) % 2 == 0) ? this.h13 : this.h23));
+        }
+
+        v.set(cx, cy);
+    }
+
+    @Override public void toBoard(float x, float y, Vector2 v)
+    {
+        boolean vert = (this.orientation == BoardFactory.BoardOrientation.VERTICAL);
+
+        float dx = x - this.x0;
+        float dy = y - this.y0;
+        float cx = (vert ? this.h : this.d);
+        float cy = (vert ? this.d : this.h);
+
+        int col = (int) (dx / cx);
+        int row = (int) (dy / cy);
+        if (dx < 0) col -=1;
+        if (dy < 0) row -=1;
+        dx -= (col * cx);
+        dy -= (row * cy);
+
+        if (vert) {
+            if (col % 2 == 0) {
+                if (row % 2 == 0) {
+                    if (dy > (dx / this.m))
+                        row += 1;
+                } else {
+                    if (dy + (dx / this.m) > d )
+                        row += 1;
+                }
+            } else {
+                if (row % 2 == 0) {
+                    if (dy + (dx / this.m) > d )
+                        row += 1;
+                } else {
+                    if (dy > (dx / this.m))
+                        row += 1;
+                }
+            }
+        } else {
+            if (row % 2 == 0) {
+                if (col % 2 == 0) {
+                    if (dy > (dx * this.m))
+                        col -= 1;
+                } else {
+                    if (dy + (dx * this.m) < h )
+                        col -= 1;
+                }
+            } else {
+                if (col % 2 == 0) {
+                    if (dy + (dx * this.m) < h )
+                        col -= 1;
+                } else {
+                    if (dy > (dx * this.m))
+                        col -= 1;
+                }
+            }
+        }
+
+        v.set(col, row);
+    }
+}