Bounding box support.

spine-libgdx/src/com/esotericsoftware/spine/SkeletonBinary.java

@@ -38,6 +38,7 @@ import com.esotericsoftware.spine.attachments.AtlasAttachmentLoader;
 import com.esotericsoftware.spine.attachments.Attachment;
 import com.esotericsoftware.spine.attachments.AttachmentLoader;
 import com.esotericsoftware.spine.attachments.AttachmentType;
+import com.esotericsoftware.spine.attachments.BoundingBoxAttachment;
 import com.esotericsoftware.spine.attachments.RegionAttachment;
 import com.esotericsoftware.spine.attachments.RegionSequenceAttachment;
 import com.esotericsoftware.spine.attachments.RegionSequenceAttachment.Mode;
@@ -187,9 +188,8 @@ public class SkeletonBinary {
 			RegionSequenceAttachment regionSequenceAttachment = (RegionSequenceAttachment)attachment;
 			regionSequenceAttachment.setFrameTime(1 / input.readFloat());
 			regionSequenceAttachment.setMode(Mode.values()[input.readInt(true)]);
-		}
 
-		if (attachment instanceof RegionAttachment) {
+		} else if (attachment instanceof RegionAttachment) {
 			RegionAttachment regionAttachment = (RegionAttachment)attachment;
 			regionAttachment.setX(input.readFloat() * scale);
 			regionAttachment.setY(input.readFloat() * scale);
@@ -199,6 +199,14 @@ public class SkeletonBinary {
 			regionAttachment.setWidth(input.readFloat() * scale);
 			regionAttachment.setHeight(input.readFloat() * scale);
 			regionAttachment.updateOffset();
+
+		} else if (attachment instanceof BoundingBoxAttachment) {
+			BoundingBoxAttachment box = (BoundingBoxAttachment)attachment;
+			int n = input.readInt(true);
+			float[] points = new float[n];
+			for (int i = 0; i < n; i++)
+				points[i] = input.readFloat();
+			box.setPoints(points);
 		}
 
 		return attachment;

spine-libgdx/src/com/esotericsoftware/spine/SkeletonBounds.java

@@ -0,0 +1,182 @@
+
+package com.esotericsoftware.spine;
+
+import com.esotericsoftware.spine.attachments.Attachment;
+import com.esotericsoftware.spine.attachments.BoundingBoxAttachment;
+
+import com.badlogic.gdx.utils.Array;
+
+public class SkeletonBounds {
+	private boolean aabb;
+	private float minX, minY, maxX, maxY;
+	private Array<BoundingBoxAttachment> boundingBoxAttachments = new Array();
+
+	public void update (Skeleton skeleton) {
+		aabb = false;
+		Array<BoundingBoxAttachment> polygons = this.boundingBoxAttachments;
+		polygons.clear();
+		Array<Slot> slots = skeleton.slots;
+		for (int i = 0, n = slots.size; i < n; i++) {
+			Slot slot = slots.get(i);
+			Attachment attachment = slot.attachment;
+			if (attachment instanceof BoundingBoxAttachment) {
+				BoundingBoxAttachment boundingBox = (BoundingBoxAttachment)attachment;
+				boundingBox.updateVertices(slot);
+				polygons.add(boundingBox);
+			}
+		}
+	}
+
+	private void aabbCompute () {
+		float minX = Integer.MAX_VALUE, minY = Integer.MAX_VALUE, maxX = Integer.MIN_VALUE, maxY = Integer.MIN_VALUE;
+		Array<BoundingBoxAttachment> boundingBoxes = this.boundingBoxAttachments;
+		for (int i = 0, n = boundingBoxes.size; i < n; i++) {
+			float[] vertices = boundingBoxes.get(i).getVertices();
+			for (int ii = 0, nn = vertices.length; ii < nn; ii += 2) {
+				float x = vertices[ii];
+				float y = vertices[ii + 1];
+				minX = Math.min(minX, x);
+				minY = Math.min(minY, y);
+				maxX = Math.max(maxX, x);
+				maxY = Math.max(maxY, y);
+			}
+		}
+		this.minX = minX;
+		this.minY = minY;
+		this.maxX = maxX;
+		this.maxY = maxY;
+		aabb = true;
+	}
+
+	/** Returns true if the axis aligned bounding box contains the point. */
+	public boolean aabbContainsPoint (float x, float y) {
+		if (!aabb) aabbCompute();
+		return x >= minX && x <= maxX && y >= minY && y <= maxY;
+	}
+
+	/** Returns true if the axis aligned bounding box intersects the line segment. */
+	public boolean aabbIntersectsSegment (float x1, float y1, float x2, float y2) {
+		if (!aabb) aabbCompute();
+		float minX = this.minX;
+		float minY = this.minY;
+		float maxX = this.maxX;
+		float maxY = this.maxY;
+		if ((x1 <= minX && x2 <= minX) || (y1 <= minY && y2 <= minY) || (x1 >= maxX && x2 >= maxX) || (y1 >= maxY && y2 >= maxY))
+			return false;
+		float m = (y2 - y1) / (x2 - x1);
+		float y = m * (minX - x1) + y1;
+		if (y > minY && y < maxY) return true;
+		y = m * (maxX - x1) + y1;
+		if (y > minY && y < maxY) return true;
+		float x = (minY - y1) / m + x1;
+		if (x > minX && x < maxX) return true;
+		x = (maxY - y1) / m + x1;
+		if (x > minX && x < maxX) return true;
+		return false;
+	}
+
+	/** Returns true if the axis aligned bounding box intersects the axis aligned bounding box of the specified bounds. */
+	public boolean aabbIntersectsSkeleton (SkeletonBounds bounds) {
+		if (!aabb) aabbCompute();
+		if (!bounds.aabb) bounds.aabbCompute();
+		return minX < bounds.maxX && maxX > bounds.minX && minY < bounds.maxY && maxY > bounds.minY;
+	}
+
+	/** Returns the first bounding box attachment that contains the point, or null. When doing many checks, it is usually more
+	 * efficient to only call this method if {@link #aabbContainsPoint(float, float)} return true. */
+	public BoundingBoxAttachment containsPoint (float x, float y) {
+		Array<BoundingBoxAttachment> boundingBoxes = this.boundingBoxAttachments;
+		for (int i = 0, n = boundingBoxes.size; i < n; i++) {
+			BoundingBoxAttachment attachment = boundingBoxes.get(i);
+			if (containsPoint(attachment, x, y)) return attachment;
+		}
+		return null;
+	}
+
+	/** Returns true if the bounding box attachment contains the point. */
+	public boolean containsPoint (BoundingBoxAttachment attachment, float x, float y) {
+		float[] vertices = attachment.getVertices();
+		int nn = vertices.length;
+		int prevIndex = nn - 2;
+		boolean inside = false;
+		for (int ii = 0; ii < nn; ii += 2) {
+			float vertexY = vertices[ii + 1];
+			float prevY = vertices[prevIndex + 1];
+			if (vertexY < y && prevY >= y || prevY < y && vertexY >= y) {
+				float vertexX = vertices[ii];
+				if (vertexX + (y - vertexY) / (prevY - vertexY) * (vertices[prevIndex] - vertexX) < x) inside = !inside;
+			}
+			prevIndex = ii;
+		}
+		return inside;
+	}
+
+	/** Returns the first bounding box attachment that contains the line segment, or null. When doing many checks, it is usually
+	 * more efficient to only call this method if {@link #aabbIntersectsSegment(float, float, float, float)} return true. */
+	public BoundingBoxAttachment intersectsSegment (float x1, float y1, float x2, float y2) {
+		Array<BoundingBoxAttachment> boundingBoxes = this.boundingBoxAttachments;
+		for (int i = 0, n = boundingBoxes.size; i < n; i++) {
+			BoundingBoxAttachment attachment = boundingBoxes.get(i);
+			if (intersectsSegment(attachment, x1, y1, x2, y2)) return attachment;
+		}
+		return null;
+	}
+
+	/** Returns true if the bounding box attachment contains the line segment. */
+	public boolean intersectsSegment (BoundingBoxAttachment attachment, float x1, float y1, float x2, float y2) {
+		float[] vertices = attachment.getVertices();
+		float width12 = x1 - x2, height12 = y1 - y2;
+		float det1 = x1 * y2 - y1 * x2;
+		int nn = vertices.length;
+		float x3 = vertices[nn - 2], y3 = vertices[nn - 1];
+		for (int ii = 0; ii < nn; ii += 2) {
+			float x4 = vertices[ii], y4 = vertices[ii + 1];
+			float det2 = x3 * y4 - y3 * x4;
+			float width34 = x3 - x4, height34 = y3 - y4;
+			float det3 = width12 * height34 - height12 * width34;
+			float x = (det1 * width34 - width12 * det2) / det3;
+			if (((x >= x3 && x <= x4) || (x >= x4 && x <= x3)) && ((x >= x1 && x <= x2) || (x >= x2 && x <= x1))) {
+				float y = (det1 * height34 - height12 * det2) / det3;
+				if (((y >= y3 && y <= y4) || (y >= y4 && y <= y3)) && ((y >= y1 && y <= y2) || (y >= y2 && y <= y1))) return true;
+			}
+			x3 = x4;
+			y3 = y4;
+
+		}
+		return false;
+	}
+
+	public float getMinX () {
+		if (!aabb) aabbCompute();
+		return minX;
+	}
+
+	public float getMinY () {
+		if (!aabb) aabbCompute();
+		return minY;
+	}
+
+	public float getMaxX () {
+		if (!aabb) aabbCompute();
+		return maxX;
+	}
+
+	public float getMaxY () {
+		if (!aabb) aabbCompute();
+		return maxY;
+	}
+
+	public float getWidth () {
+		if (!aabb) aabbCompute();
+		return maxX - minX;
+	}
+
+	public float getHeight () {
+		if (!aabb) aabbCompute();
+		return maxY - minY;
+	}
+
+	public Array<BoundingBoxAttachment> getBoundingBoxAttachments () {
+		return boundingBoxAttachments;
+	}
+}

spine-libgdx/src/com/esotericsoftware/spine/SkeletonJson.java

@@ -38,6 +38,7 @@ import com.esotericsoftware.spine.attachments.AtlasAttachmentLoader;
 import com.esotericsoftware.spine.attachments.Attachment;
 import com.esotericsoftware.spine.attachments.AttachmentLoader;
 import com.esotericsoftware.spine.attachments.AttachmentType;
+import com.esotericsoftware.spine.attachments.BoundingBoxAttachment;
 import com.esotericsoftware.spine.attachments.RegionAttachment;
 import com.esotericsoftware.spine.attachments.RegionSequenceAttachment;
 import com.esotericsoftware.spine.attachments.RegionSequenceAttachment.Mode;
@@ -172,9 +173,8 @@ public class SkeletonJson {
 
 			String modeString = map.getString("mode");
 			regionSequenceAttachment.setMode(modeString == null ? Mode.forward : Mode.valueOf(modeString));
-		}
 
-		if (attachment instanceof RegionAttachment) {
+		} else if (attachment instanceof RegionAttachment) {
 			RegionAttachment regionAttachment = (RegionAttachment)attachment;
 			regionAttachment.setX(map.getFloat("x", 0) * scale);
 			regionAttachment.setY(map.getFloat("y", 0) * scale);
@@ -184,6 +184,15 @@ public class SkeletonJson {
 			regionAttachment.setWidth(map.getFloat("width", 32) * scale);
 			regionAttachment.setHeight(map.getFloat("height", 32) * scale);
 			regionAttachment.updateOffset();
+
+		} else if (attachment instanceof BoundingBoxAttachment) {
+			BoundingBoxAttachment box = (BoundingBoxAttachment)attachment;
+			JsonValue pointsArray = map.require("points");
+			float[] points = new float[pointsArray.size];
+			int i = 0;
+			for (JsonValue point = pointsArray.child; point != null; point = point.next())
+				points[i++] = point.asFloat();
+			box.setPoints(points);
 		}
 
 		return attachment;

spine-libgdx/src/com/esotericsoftware/spine/SkeletonRendererDebug.java

@@ -2,6 +2,7 @@
 package com.esotericsoftware.spine;
 
 import com.esotericsoftware.spine.attachments.Attachment;
+import com.esotericsoftware.spine.attachments.BoundingBoxAttachment;
 import com.esotericsoftware.spine.attachments.RegionAttachment;
 
 import static com.badlogic.gdx.graphics.g2d.SpriteBatch.*;
@@ -14,9 +15,15 @@ import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
 import com.badlogic.gdx.utils.Array;
 
 public class SkeletonRendererDebug {
-	static private final Color slotLineColor = new Color(0, 0, 1, 0.5f);
+	static private final Color boneLineColor = Color.RED;
+	static private final Color boneOriginColor = Color.GREEN;
+	static private final Color regionAttachmentLineColor = new Color(0, 0, 1, 0.5f);
+	static private final Color boundingBoxColor = new Color(0, 1, 0, 0.8f);
+	static private final Color aabbColor = new Color(0, 1, 0, 0.5f);
 
-	private ShapeRenderer renderer;
+	private final ShapeRenderer renderer;
+	private boolean drawBones = true, drawRegionAttachments = true, drawBoundingBoxes = true;
+	private final SkeletonBounds bounds = new SkeletonBounds();
 
 	public SkeletonRendererDebug () {
 		renderer = new ShapeRenderer();
@@ -27,47 +34,78 @@ public class SkeletonRendererDebug {
 		float skeletonY = skeleton.getY();
 
 		Gdx.gl.glEnable(GL10.GL_BLEND);
+		ShapeRenderer renderer = this.renderer;
 		renderer.begin(ShapeType.Line);
 
-		renderer.setColor(Color.RED);
 		Array<Bone> bones = skeleton.getBones();
-		for (int i = 0, n = bones.size; i < n; i++) {
-			Bone bone = bones.get(i);
-			if (bone.parent == null) continue;
-			float x = skeletonX + bone.data.length * bone.m00 + bone.worldX;
-			float y = skeletonY + bone.data.length * bone.m10 + bone.worldY;
-			renderer.line(skeletonX + bone.worldX, skeletonY + bone.worldY, x, y);
+		if (drawBones) {
+			renderer.setColor(boneLineColor);
+			for (int i = 0, n = bones.size; i < n; i++) {
+				Bone bone = bones.get(i);
+				if (bone.parent == null) continue;
+				float x = skeletonX + bone.data.length * bone.m00 + bone.worldX;
+				float y = skeletonY + bone.data.length * bone.m10 + bone.worldY;
+				renderer.line(skeletonX + bone.worldX, skeletonY + bone.worldY, x, y);
+			}
 		}
 
-		renderer.setColor(slotLineColor);
-		Array<Slot> slots = skeleton.getSlots();
-		for (int i = 0, n = slots.size; i < n; i++) {
-			Slot slot = slots.get(i);
-			Attachment attachment = slot.attachment;
-			if (attachment instanceof RegionAttachment) {
-				RegionAttachment regionAttachment = (RegionAttachment)attachment;
-				regionAttachment.updateVertices(slot, false);
-				float[] vertices = regionAttachment.getVertices();
-				renderer.line(vertices[X1], vertices[Y1], vertices[X2], vertices[Y2]);
-				renderer.line(vertices[X2], vertices[Y2], vertices[X3], vertices[Y3]);
-				renderer.line(vertices[X3], vertices[Y3], vertices[X4], vertices[Y4]);
-				renderer.line(vertices[X4], vertices[Y4], vertices[X1], vertices[Y1]);
+		if (drawRegionAttachments) {
+			renderer.setColor(regionAttachmentLineColor);
+			Array<Slot> slots = skeleton.getSlots();
+			for (int i = 0, n = slots.size; i < n; i++) {
+				Slot slot = slots.get(i);
+				Attachment attachment = slot.attachment;
+				if (attachment instanceof RegionAttachment) {
+					RegionAttachment regionAttachment = (RegionAttachment)attachment;
+					regionAttachment.updateVertices(slot, false);
+					float[] vertices = regionAttachment.getVertices();
+					renderer.line(vertices[X1], vertices[Y1], vertices[X2], vertices[Y2]);
+					renderer.line(vertices[X2], vertices[Y2], vertices[X3], vertices[Y3]);
+					renderer.line(vertices[X3], vertices[Y3], vertices[X4], vertices[Y4]);
+					renderer.line(vertices[X4], vertices[Y4], vertices[X1], vertices[Y1]);
+				}
 			}
 		}
 
-		renderer.end();
+		if (drawBoundingBoxes) {
+			SkeletonBounds bounds = this.bounds;
+			bounds.update(skeleton);
+			renderer.setColor(aabbColor);
+			renderer.rect(bounds.getMinX(), bounds.getMinY(), bounds.getWidth(), bounds.getHeight());
+			renderer.setColor(boundingBoxColor);
+			Array<BoundingBoxAttachment> boundingBoxes = bounds.getBoundingBoxAttachments();
+			for (int i = 0, n = boundingBoxes.size; i < n; i++)
+				renderer.polygon(boundingBoxes.get(i).getVertices());
+		}
 
-		renderer.setColor(Color.GREEN);
+		renderer.end();
 		renderer.begin(ShapeType.Filled);
-		for (int i = 0, n = bones.size; i < n; i++) {
-			Bone bone = bones.get(i);
-			renderer.setColor(Color.GREEN);
-			renderer.circle(skeletonX + bone.worldX, skeletonY + bone.worldY, 3);
+
+		if (drawBones) {
+			renderer.setColor(boneOriginColor);
+			for (int i = 0, n = bones.size; i < n; i++) {
+				Bone bone = bones.get(i);
+				renderer.setColor(Color.GREEN);
+				renderer.circle(skeletonX + bone.worldX, skeletonY + bone.worldY, 3);
+			}
 		}
+
 		renderer.end();
 	}
 
 	public ShapeRenderer getShapeRenderer () {
 		return renderer;
 	}
+
+	public void setBones (boolean bones) {
+		this.drawBones = bones;
+	}
+
+	public void setRegionAttachments (boolean regionAttachments) {
+		this.drawRegionAttachments = regionAttachments;
+	}
+
+	public void setBoundingBoxes (boolean boundingBoxes) {
+		this.drawBoundingBoxes = boundingBoxes;
+	}
 }

spine-libgdx/src/com/esotericsoftware/spine/attachments/AtlasAttachmentLoader.java

@@ -44,9 +44,11 @@ public class AtlasAttachmentLoader implements AttachmentLoader {
 		case region:
 			attachment = new RegionAttachment(name);
 			break;
-		case regionSequence:
+		case regionsequence:
 			attachment = new RegionSequenceAttachment(name);
 			break;
+		case boundingbox:
+			return new BoundingBoxAttachment(name);
 		default:
 			throw new IllegalArgumentException("Unknown attachment type: " + type);
 		}

spine-libgdx/src/com/esotericsoftware/spine/attachments/AttachmentType.java

@@ -26,5 +26,5 @@
 package com.esotericsoftware.spine.attachments;
 
 public enum AttachmentType {
-	region, regionSequence
+	region, regionsequence, boundingbox
 }

spine-libgdx/src/com/esotericsoftware/spine/attachments/BoundingBoxAttachment.java

@@ -0,0 +1,71 @@
+/*******************************************************************************
+ * Copyright (c) 2013, Esoteric Software
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
+
+package com.esotericsoftware.spine.attachments;
+
+import com.esotericsoftware.spine.Bone;
+import com.esotericsoftware.spine.Skeleton;
+import com.esotericsoftware.spine.Slot;
+
+public class BoundingBoxAttachment extends Attachment {
+	private float[] points;
+	private float[] vertices;
+
+	public BoundingBoxAttachment (String name) {
+		super(name);
+	}
+
+	public void updateVertices (Slot slot) {
+		Bone bone = slot.getBone();
+		Skeleton skeleton = slot.getSkeleton();
+		float x = bone.getWorldX() + skeleton.getX();
+		float y = bone.getWorldY() + skeleton.getY();
+		float m00 = bone.getM00();
+		float m01 = bone.getM01();
+		float m10 = bone.getM10();
+		float m11 = bone.getM11();
+		float[] vertices = this.vertices;
+		float[] points = this.points;
+		for (int i = 0, n = points.length; i < n; i += 2) {
+			float px = points[i];
+			float py = points[i + 1];
+			vertices[i] = px * m00 + py * m01 + x;
+			vertices[i + 1] = px * m10 + py * m11 + y;
+		}
+	}
+
+	public float[] getVertices () {
+		return vertices;
+	}
+
+	public float[] getPoints () {
+		return points;
+	}
+
+	public void setPoints (float[] points) {
+		this.points = points;
+		if (vertices == null || vertices.length != points.length) vertices = new float[points.length];
+	}
+}

spine-libgdx/src/com/esotericsoftware/spine/attachments/RegionAttachment.java

@@ -177,6 +177,10 @@ public class RegionAttachment extends Attachment {
 		return vertices;
 	}
 
+	public float[] getOffset () {
+		return offset;
+	}
+
 	public float getX () {
 		return x;
 	}