com.esotericsoftware.spine.attachments.RegionAttachment Maven / Gradle / Ivy
/******************************************************************************
* Spine Runtimes License Agreement
* Last updated January 1, 2020. Replaces all prior versions.
*
* Copyright (c) 2013-2020, Esoteric Software LLC
*
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package com.esotericsoftware.spine.attachments;
import static com.esotericsoftware.spine.utils.SpineUtils.*;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.g2d.TextureAtlas.AtlasRegion;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.esotericsoftware.spine.Bone;
/** An attachment that displays a textured quadrilateral.
*
* See Region attachments in the Spine User Guide. */
public class RegionAttachment extends Attachment {
static public final int BLX = 0;
static public final int BLY = 1;
static public final int ULX = 2;
static public final int ULY = 3;
static public final int URX = 4;
static public final int URY = 5;
static public final int BRX = 6;
static public final int BRY = 7;
private TextureRegion region;
private String path;
private float x, y, scaleX = 1, scaleY = 1, rotation, width, height;
private final float[] uvs = new float[8];
private final float[] offset = new float[8];
private final Color color = new Color(1, 1, 1, 1);
public RegionAttachment (String name) {
super(name);
}
/** Calculates the {@link #offset} using the region settings. Must be called after changing region settings. */
public void updateOffset () {
float width = getWidth();
float height = getHeight();
float localX2 = width / 2;
float localY2 = height / 2;
float localX = -localX2;
float localY = -localY2;
if (region instanceof AtlasRegion) {
AtlasRegion region = (AtlasRegion)this.region;
localX += region.offsetX / region.originalWidth * width;
localY += region.offsetY / region.originalHeight * height;
if (region.degrees == 90) {
localX2 -= (region.originalWidth - region.offsetX - region.packedHeight) / region.originalWidth * width;
localY2 -= (region.originalHeight - region.offsetY - region.packedWidth) / region.originalHeight * height;
} else {
localX2 -= (region.originalWidth - region.offsetX - region.packedWidth) / region.originalWidth * width;
localY2 -= (region.originalHeight - region.offsetY - region.packedHeight) / region.originalHeight * height;
}
}
float scaleX = getScaleX();
float scaleY = getScaleY();
localX *= scaleX;
localY *= scaleY;
localX2 *= scaleX;
localY2 *= scaleY;
float rotation = getRotation();
float cos = (float)Math.cos(degRad * rotation);
float sin = (float)Math.sin(degRad * rotation);
float x = getX();
float y = getY();
float localXCos = localX * cos + x;
float localXSin = localX * sin;
float localYCos = localY * cos + y;
float localYSin = localY * sin;
float localX2Cos = localX2 * cos + x;
float localX2Sin = localX2 * sin;
float localY2Cos = localY2 * cos + y;
float localY2Sin = localY2 * sin;
float[] offset = this.offset;
offset[BLX] = localXCos - localYSin;
offset[BLY] = localYCos + localXSin;
offset[ULX] = localXCos - localY2Sin;
offset[ULY] = localY2Cos + localXSin;
offset[URX] = localX2Cos - localY2Sin;
offset[URY] = localY2Cos + localX2Sin;
offset[BRX] = localX2Cos - localYSin;
offset[BRY] = localYCos + localX2Sin;
}
public void setRegion (TextureRegion region) {
if (region == null) throw new IllegalArgumentException("region cannot be null.");
this.region = region;
float[] uvs = this.uvs;
if (region instanceof AtlasRegion && ((AtlasRegion)region).degrees == 90) {
uvs[URX] = region.getU();
uvs[URY] = region.getV2();
uvs[BRX] = region.getU();
uvs[BRY] = region.getV();
uvs[BLX] = region.getU2();
uvs[BLY] = region.getV();
uvs[ULX] = region.getU2();
uvs[ULY] = region.getV2();
} else {
uvs[ULX] = region.getU();
uvs[ULY] = region.getV2();
uvs[URX] = region.getU();
uvs[URY] = region.getV();
uvs[BRX] = region.getU2();
uvs[BRY] = region.getV();
uvs[BLX] = region.getU2();
uvs[BLY] = region.getV2();
}
}
public TextureRegion getRegion () {
if (region == null) throw new IllegalStateException("Region has not been set: " + this);
return region;
}
/** Transforms the attachment's four vertices to world coordinates.
*
* See World transforms in the Spine
* Runtimes Guide.
* @param worldVertices The output world vertices. Must have a length >= offset + 8.
* @param offset The worldVertices index to begin writing values.
* @param stride The number of worldVertices entries between the value pairs written. */
public void computeWorldVertices (Bone bone, float[] worldVertices, int offset, int stride) {
float[] vertexOffset = this.offset;
float x = bone.getWorldX(), y = bone.getWorldY();
float a = bone.getA(), b = bone.getB(), c = bone.getC(), d = bone.getD();
float offsetX, offsetY;
offsetX = vertexOffset[BRX];
offsetY = vertexOffset[BRY];
worldVertices[offset] = offsetX * a + offsetY * b + x; // br
worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
offset += stride;
offsetX = vertexOffset[BLX];
offsetY = vertexOffset[BLY];
worldVertices[offset] = offsetX * a + offsetY * b + x; // bl
worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
offset += stride;
offsetX = vertexOffset[ULX];
offsetY = vertexOffset[ULY];
worldVertices[offset] = offsetX * a + offsetY * b + x; // ul
worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
offset += stride;
offsetX = vertexOffset[URX];
offsetY = vertexOffset[URY];
worldVertices[offset] = offsetX * a + offsetY * b + x; // ur
worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
}
/** For each of the 4 vertices, a pair of x,y values that is the local position of the vertex.
*
* See {@link #updateOffset()}. */
public float[] getOffset () {
return offset;
}
public float[] getUVs () {
return uvs;
}
/** The local x translation. */
public float getX () {
return x;
}
public void setX (float x) {
this.x = x;
}
/** The local y translation. */
public float getY () {
return y;
}
public void setY (float y) {
this.y = y;
}
/** The local scaleX. */
public float getScaleX () {
return scaleX;
}
public void setScaleX (float scaleX) {
this.scaleX = scaleX;
}
/** The local scaleY. */
public float getScaleY () {
return scaleY;
}
public void setScaleY (float scaleY) {
this.scaleY = scaleY;
}
/** The local rotation. */
public float getRotation () {
return rotation;
}
public void setRotation (float rotation) {
this.rotation = rotation;
}
/** The width of the region attachment in Spine. */
public float getWidth () {
return width;
}
public void setWidth (float width) {
this.width = width;
}
/** The height of the region attachment in Spine. */
public float getHeight () {
return height;
}
public void setHeight (float height) {
this.height = height;
}
/** The color to tint the region attachment. */
public Color getColor () {
return color;
}
/** The name of the texture region for this attachment. */
public String getPath () {
return path;
}
public void setPath (String path) {
this.path = path;
}
public Attachment copy () {
RegionAttachment copy = new RegionAttachment(name);
copy.region = region;
copy.path = path;
copy.x = x;
copy.y = y;
copy.scaleX = scaleX;
copy.scaleY = scaleY;
copy.rotation = rotation;
copy.width = width;
copy.height = height;
arraycopy(uvs, 0, copy.uvs, 0, 8);
arraycopy(offset, 0, copy.offset, 0, 8);
copy.color.set(color);
return copy;
}
}