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99 lines
2.5 KiB
99 lines
2.5 KiB
package mightypork.gamecore.graphics.textures;
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import mightypork.utils.math.constraints.rect.Rect;
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/**
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* {@link TxQuad} and {@link TxSheet} building utility, that cuts a texture into
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* equally sized quads.
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*
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* @author Ondřej Hruška (MightyPork)
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*/
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public class QuadGrid {
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private final ITexture tx;
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private final int txHeight;
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private final int txWidth;
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private final double tileW;
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private final double tileH;
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/**
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* @param tx backing texture
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* @param tilesX number of tile columns
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* @param tilesY number of tile rows
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*/
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public QuadGrid(ITexture tx, int tilesX, int tilesY)
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{
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this.tx = tx;
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this.txWidth = tilesX;
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this.txHeight = tilesY;
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this.tileW = 1D / tilesX;
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this.tileH = 1D / tilesY;
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}
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/**
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* Make square quad at given coords (one grid cell)
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*
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* @param x x coordinate (cells)
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* @param y y coordinate (cells)
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* @return the quad
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*/
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public TxQuad makeQuad(double x, double y)
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{
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if (x < 0 || x >= txWidth || y < 0 || y >= txHeight) {
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throw new IndexOutOfBoundsException("Requested invalid txquad coordinates.");
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}
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return makeQuad(x, y, 1, 1);
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}
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/**
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* Make square quad at given coords, with arbitrary size. Coordinates are
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* multiples of cell size.
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*
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* @param x x coordinate (cells)
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* @param y y coordinate (cells)
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* @param width width (cells)
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* @param height height (cells)
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* @return the quad
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*/
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public TxQuad makeQuad(double x, double y, double width, double height)
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{
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if (x < 0 || x >= txWidth || y < 0 || y >= txHeight) {
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throw new IndexOutOfBoundsException("Requested invalid txquad coordinates.");
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}
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if (x + width > txWidth || y + height > txHeight) {
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throw new IndexOutOfBoundsException("Requested invalid txquad size (would go beyond texture size).");
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}
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return tx.makeQuad(Rect.make(tileW * x, tileH * y, tileW * width, tileH * height));
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}
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/**
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* Make a sheet.
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*
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* @param x x origin coordinate (cells)
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* @param y y origin coordinate (cells)
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* @param width width (cells)
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* @param height height (cells)
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* @return the sheet
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*/
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public TxSheet makeSheet(double x, double y, double width, double height)
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{
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if (x < 0 || x >= txWidth || y < 0 || y >= txHeight) {
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throw new IndexOutOfBoundsException("Requested invalid txquad coordinates.");
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}
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if (x + width > txWidth || y + height > txHeight) {
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throw new IndexOutOfBoundsException("Requested invalid txsheet size (would go beyond texture size).");
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}
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return makeQuad(x, y).makeSheet(width, height);
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}
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}
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