From 2fbebd4fbcf0158ce617b58a955ac824b0a0f895 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Hru=C5=A1ka?= <hruskon5@fel.cvut.cz>
Date: Mon, 14 Apr 2014 22:26:54 +0200
Subject: [PATCH] Tiled rect

---
 .../utils/math/constraints/rect/Rect.java     |  17 +++
 .../math/constraints/rect/RectProxy.java      |  18 +++
 .../math/constraints/rect/TiledRect.java      | 112 ++++++++++++++++++
 3 files changed, 147 insertions(+)
 create mode 100644 src/mightypork/utils/math/constraints/rect/RectProxy.java
 create mode 100644 src/mightypork/utils/math/constraints/rect/TiledRect.java

diff --git a/src/mightypork/utils/math/constraints/rect/Rect.java b/src/mightypork/utils/math/constraints/rect/Rect.java
index 917f0ff..a22c3d0 100644
--- a/src/mightypork/utils/math/constraints/rect/Rect.java
+++ b/src/mightypork/utils/math/constraints/rect/Rect.java
@@ -758,4 +758,21 @@ public abstract class Rect implements RectBound {
 		return centerTo(parent.center());
 	}
 	
+	
+	public TiledRect tiles(int horizontal, int vertical)
+	{
+		return new TiledRect(this, horizontal, vertical);
+	}
+	
+	
+	public TiledRect columns(int columns)
+	{
+		return new TiledRect(this, columns, 1);
+	}
+	
+	
+	public TiledRect rows(int rows)
+	{
+		return new TiledRect(this, 1, rows);
+	}
 }
diff --git a/src/mightypork/utils/math/constraints/rect/RectProxy.java b/src/mightypork/utils/math/constraints/rect/RectProxy.java
new file mode 100644
index 0000000..809127a
--- /dev/null
+++ b/src/mightypork/utils/math/constraints/rect/RectProxy.java
@@ -0,0 +1,18 @@
+package mightypork.utils.math.constraints.rect;
+
+
+public class RectProxy extends RectAdapter {
+	
+	private Rect source;
+
+	public RectProxy(Rect source) {
+		this.source = source;
+	}
+
+	@Override
+	protected Rect getSource()
+	{
+		return source;
+	}
+	
+}
diff --git a/src/mightypork/utils/math/constraints/rect/TiledRect.java b/src/mightypork/utils/math/constraints/rect/TiledRect.java
new file mode 100644
index 0000000..c7e5faf
--- /dev/null
+++ b/src/mightypork/utils/math/constraints/rect/TiledRect.java
@@ -0,0 +1,112 @@
+package mightypork.utils.math.constraints.rect;
+
+
+import mightypork.utils.math.constraints.num.Num;
+
+
+/**
+ * Utility for cutting rect into evenly sized cells.
+ * 
+ * @author MightyPork
+ */
+public class TiledRect extends RectProxy {
+	
+	final private int tilesY;
+	final private int tilesX;
+	final private Num perRow;
+	final private Num perCol;
+	
+	
+	TiledRect(Rect source, int horizontal, int vertical) {
+		super(source);
+		this.tilesX = horizontal;
+		this.tilesY = vertical;
+		
+		this.perRow = height().div(vertical);
+		this.perCol = width().div(horizontal);
+	}
+	
+	
+	/**
+	 * Get a tile. Tiles count from 0 to n-1
+	 * 
+	 * @param x x position (zero based)
+	 * @param y y position (zero based)
+	 * @return tile
+	 * @throws IndexOutOfBoundsException when invalid index is specified.
+	 */
+	public Rect tile(int x, int y)
+	{
+		if (x >= tilesX || x < 0) {
+			throw new IndexOutOfBoundsException("X coordinate out fo range.");
+		}
+		
+		if (y >= tilesY || y < 0) {
+			throw new IndexOutOfBoundsException("Y coordinate out of range.");
+		}
+		
+		final Num leftMove = left().add(perCol.mul(x));
+		final Num topMove = top().add(perRow.mul(y));
+		
+		return Rect.make(perCol,perRow).move(leftMove, topMove);
+	}
+	
+	
+	/**
+	 * Get a span (tile spanning across multiple cells)
+	 * 
+	 * @param x_from x start position
+	 * @param x_to x end position (included)
+	 * @param y_from y start position
+	 * @param y_to y end position (included)
+	 * @return tile the tile
+	 * @throws IndexOutOfBoundsException when invalid index is specified.
+	 */
+	public Rect span(int x_from, int x_to, int y_from, int y_to)
+	{
+		if (x_from >= tilesX || x_from < 0 || x_to >= tilesX || x_to < 0) {
+			throw new IndexOutOfBoundsException("X coordinate(s) out of range.");
+		}
+		if (y_from >= tilesY || y_from < 0 || y_to >= tilesY || y_to < 0) {
+			throw new IndexOutOfBoundsException("Y coordinate(s) out of range.");
+		}
+		if (x_from > x_to) {
+			throw new IndexOutOfBoundsException("x_from > x_to");
+		}
+		
+		if (y_from > y_to) {
+			throw new IndexOutOfBoundsException("y_from > y_to");
+		}
+
+		final Num leftMove = left().add(perCol.mul(x_from));
+		final Num topMove = top().add(perRow.mul(y_from));
+		
+		return Rect.make(perCol.mul(x_to - x_from + 1), perRow.mul(x_to - x_from + 1)).move(leftMove, topMove);
+	}
+	
+	
+	/**
+	 * Get n-th column (tile n,1)
+	 * 
+	 * @param n column index (zero based)
+	 * @return the column tile
+	 * @throws IndexOutOfBoundsException when invalid index is specified.
+	 */
+	public Rect column(int n)
+	{
+		return tile(n, 1);
+	}
+	
+	
+	/**
+	 * Get n-th row (tile 1,n)
+	 * 
+	 * @param n row index (zero based)
+	 * @return the row rect
+	 * @throws IndexOutOfBoundsException when invalid index is specified.
+	 */
+	public Rect row(int n)
+	{
+		return tile(1, n);
+	}
+}