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130 lines
3.0 KiB
130 lines
3.0 KiB
package mightypork.gamecore.util.math.constraints.rect.builders;
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import mightypork.gamecore.logging.Log;
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import mightypork.gamecore.util.math.constraints.num.Num;
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import mightypork.gamecore.util.math.constraints.rect.Rect;
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import mightypork.gamecore.util.math.constraints.rect.proxy.RectProxy;
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import mightypork.gamecore.util.math.constraints.vect.Vect;
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/**
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* Utility for cutting rect into evenly sized cells.
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*
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* @author Ondřej Hruška (MightyPork)
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*/
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public class TiledRect extends RectProxy {
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final private int tilesY;
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final private int tilesX;
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final private Num perRow;
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final private Num perCol;
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/** Left top tile */
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private Rect aTile;
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public TiledRect(Rect source, int horizontal, int vertical)
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{
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super(source);
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this.tilesX = horizontal;
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this.tilesY = vertical;
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this.perRow = height().div(vertical);
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this.perCol = width().div(horizontal);
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this.aTile = Rect.make(origin(), perCol, perRow);
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}
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/**
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* Set tile overlap. Applies only to tile, not span.
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*
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* @param overlap how far to overlap to neighbouring tiles on all sides
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*/
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public void setOverlap(double overlap)
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{
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aTile = aTile.grow(overlap);
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}
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/**
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* Get a tile.
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*
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* @param x x position
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* @param y y position
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* @return tile
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* @throws IndexOutOfBoundsException when invalid index is specified.
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*/
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public Rect tile(int x, int y)
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{
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if (x >= tilesX || x < 0) {
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throw new IndexOutOfBoundsException("X coordinate out fo range: " + x);
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}
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if (y >= tilesY || y < 0) {
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throw new IndexOutOfBoundsException("Y coordinate out of range: " + y);
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}
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return aTile.move(perCol.mul(x), perRow.mul(y));
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}
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/**
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* Get a span (tile spanning across multiple cells)
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*
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* @param x x start position
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* @param y y start position
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* @param size_x horizontal size (columns)
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* @param size_y vertical size (rows)
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* @return tile the tile
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* @throws IndexOutOfBoundsException when invalid index is specified.
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*/
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public Rect span(int x, int y, int size_x, int size_y)
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{
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final int x_to = x + size_x - 1;
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final int y_to = y + size_y - 1;
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if (size_x <= 0 || size_y <= 0) {
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Log.w("Size must be > 0.", new IllegalAccessException());
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}
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if (x >= tilesX || x < 0 || x_to >= tilesX || x_to < 0) {
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Log.w("X coordinate(s) out of range.", new IllegalAccessException());
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}
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if (y >= tilesY || y < 0 || y_to >= tilesY || y_to < 0) {
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Log.w("Y coordinate(s) out of range.", new IllegalAccessException());
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}
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final Vect orig = origin().add(perCol.mul(x), perRow.mul(y));
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return Rect.make(orig, perCol.mul(size_x), perRow.mul(size_y));
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}
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/**
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* Get n-th column
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*
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* @param n column index
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* @return the column tile
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* @throws IndexOutOfBoundsException when invalid index is specified.
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*/
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public Rect column(int n)
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{
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return tile(n, 0);
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}
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/**
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* Get n-th row
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*
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* @param n row index
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* @return the row rect
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* @throws IndexOutOfBoundsException when invalid index is specified.
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*/
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public Rect row(int n)
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{
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return tile(0, n);
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}
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}
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