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add AutoGridTextureAtlas

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Gered 2013-07-03 18:31:17 -04:00
parent cc17afdd8e
commit d55361ae3a
1 changed files with 57 additions and 0 deletions
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src/com/blarg/gdx/graphics/AutoGridTextureAtlas.java Normal file
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package com.blarg.gdx.graphics;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
public class AutoGridTextureAtlas extends TextureAtlas {
public final int tileWidth;
public final int tileHeight;
public final int tileBorder;
public AutoGridTextureAtlas(Texture texture, int tileWidth, int tileHeight, int tileBorder) {
this(texture, tileWidth, tileHeight, tileBorder, TEXCOORD_EDGE_BLEED_OFFSET);
}
public AutoGridTextureAtlas(Texture texture, int tileWidth, int tileHeight, int tileBorder, float edgeCoordOffset) {
super(texture, edgeCoordOffset);
this.tileWidth = tileWidth;
this.tileHeight = tileHeight;
this.tileBorder = tileBorder;
generateGrid();
}
private void generateGrid() {
int actualTileWidth = tileWidth + tileBorder;
int actualTileHeight = tileHeight + tileBorder;
int tilesX = (texture.getWidth() - tileBorder) / (tileWidth + tileBorder);
int tilesY = (texture.getHeight() - tileBorder) / (tileHeight + tileBorder);
for (int y = 0; y < tilesY; ++y)
{
for (int x = 0; x < tilesX; ++x)
{
// pixel location/dimensions
int left = tileBorder + x * actualTileWidth;
int top = tileBorder + y * actualTileHeight;
int right = left + actualTileWidth - tileBorder;
int bottom = top + actualTileHeight - tileBorder;
// texture coordinates
// HACK: subtract edgeCoordOffset from the bottom right edges to
// get around floating point rounding errors (adjacent tiles will
// slightly bleed in otherwise)
float u = (left - tileBorder + edgeCoordOffset) / (float)texture.getWidth();
float v = (top - tileBorder + edgeCoordOffset) / (float)texture.getHeight();
float u2 = ((float)right + tileBorder - edgeCoordOffset) / (float)texture.getWidth();
float v2 = ((float)bottom + tileBorder - edgeCoordOffset) / (float)texture.getHeight();
TextureRegion tile = new TextureRegion();
tile.setTexture(texture);
tile.setRegion(u, v, u2, v2);
tiles.add(tile);
}
}
}
}