add CustomGridTextureAtlas

src/com/blarg/gdx/graphics/CustomGridTextureAtlas.java

@@ -0,0 +1,47 @@
+package com.blarg.gdx.graphics;
+
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.graphics.g2d.TextureRegion;
+import com.badlogic.gdx.math.Rectangle;
+
+public class CustomGridTextureAtlas extends TextureAtlas {
+	public CustomGridTextureAtlas(Texture texture) {
+		this(texture, TEXCOORD_EDGE_BLEED_OFFSET);
+	}
+
+	public CustomGridTextureAtlas(Texture texture, float edgeCoordOffset) {
+		super(texture, edgeCoordOffset);
+	}
+
+	public int add(Rectangle rect) {
+		return add((int)rect.x, (int)rect.y, (int)rect.getWidth(), (int)rect.getHeight());
+	}
+
+	public int add(int x, int y, int width, int height) {
+		// pixel location/dimensions
+		int left = x;
+		int top = y;
+		int right = left + width;
+		int bottom = top + height;
+
+		// 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 + edgeCoordOffset) / (float)texture.getWidth();
+		float v = (top + edgeCoordOffset) / (float)texture.getHeight();
+		float u2 = ((float)right - edgeCoordOffset) / (float)texture.getWidth();
+		float v2 = ((float)bottom - edgeCoordOffset) / (float)texture.getHeight();
+
+		TextureRegion tile = new TextureRegion();
+		tile.setTexture(texture);
+		tile.setRegion(u, v, u2, v2);
+		tiles.add(tile);
+
+		return tiles.size - 1;
+	}
+
+	public void reset() {
+		tiles.clear();
+	}
+}