public static KeyframeSet ofFloat(float... values) {
int numKeyframes = values.length;
FloatKeyframe keyframes[] = new FloatKeyframe[Math.max(numKeyframes, 2)];
if (numKeyframes == 1) {
keyframes[0] = (FloatKeyframe) Keyframe.ofFloat(0f);
keyframes[1] = (FloatKeyframe) Keyframe.ofFloat(1f, values[0]);
} else {
keyframes[0] = (FloatKeyframe) Keyframe.ofFloat(0f, values[0]);
for (int i = 1; i < numKeyframes; ++i) {
keyframes[i] = (FloatKeyframe) Keyframe.ofFloat((float) i / (numKeyframes - 1), values[i]);
}
}
return new FloatKeyframeSet(keyframes);
}
public KeyframeSet(Keyframe... keyframes) {
mNumKeyframes = keyframes.length;
mKeyframes = new ArrayList<Keyframe>();
mKeyframes.addAll(Arrays.asList(keyframes));
mFirstKeyframe = mKeyframes.get(0);
mLastKeyframe = mKeyframes.get(mNumKeyframes - 1);
mInterpolator = mLastKeyframe.getInterpolator();
}
/**
* Internal function (called from ObjectAnimator) to set up the setter and getter prior to running
* the animation. If the setter has not been manually set for this object, it will be derived
* automatically given the property name, target object, and types of values supplied. If no
* getter has been set, it will be supplied iff any of the supplied values was null. If there is a
* null value, then the getter (supplied or derived) will be called to set those null values to
* the current value of the property on the target object.
*
* @param target The object on which the setter (and possibly getter) exist.
*/
void setupSetterAndGetter(Object target) {
// if (mProperty != null) {
// // check to make sure that mProperty is on the class of target
// try {
// Object testValue = mProperty.get(target);
// for (Keyframe kf : mKeyframeSet.mKeyframes) {
// if (!kf.hasValue()) {
// kf.setValue(mProperty.get(target));
// }
// }
// return;
// } catch (ClassCastException e) {
// Log.e("PropertyValuesHolder","No such property (" + mProperty.getName() +
// ") on target object " + target + ". Trying reflection instead");
// mProperty = null;
// }
// }
Class targetClass = target.getClass();
if (mSetter == null) {
setupSetter(targetClass);
}
for (Keyframe kf : mKeyframeSet.mKeyframes) {
if (!kf.hasValue()) {
if (mGetter == null) {
setupGetter(targetClass);
}
try {
kf.setValue(mGetter.invoke(target));
} catch (InvocationTargetException e) {
Log.e("PropertyValuesHolder", e.toString());
} catch (IllegalAccessException e) {
Log.e("PropertyValuesHolder", e.toString());
}
}
}
}
/**
* Utility function to set the value stored in a particular Keyframe. The value used is whatever
* the value is for the property name specified in the keyframe on the target object.
*
* @param target The target object from which the current value should be extracted.
* @param kf The keyframe which holds the property name and value.
*/
private void setupValue(Object target, Keyframe kf) {
// if (mProperty != null) {
// kf.setValue(mProperty.get(target));
// }
try {
if (mGetter == null) {
Class targetClass = target.getClass();
setupGetter(targetClass);
}
kf.setValue(mGetter.invoke(target));
} catch (InvocationTargetException e) {
Log.e("PropertyValuesHolder", e.toString());
} catch (IllegalAccessException e) {
Log.e("PropertyValuesHolder", e.toString());
}
}
/**
* Gets the animated value, given the elapsed fraction of the animation (interpolated by the
* animation's interpolator) and the evaluator used to calculate in-between values. This function
* maps the input fraction to the appropriate keyframe interval and a fraction between them and
* returns the interpolated value. Note that the input fraction may fall outside the [0-1] bounds,
* if the animation's interpolator made that happen (e.g., a spring interpolation that might send
* the fraction past 1.0). We handle this situation by just using the two keyframes at the
* appropriate end when the value is outside those bounds.
*
* @param fraction The elapsed fraction of the animation
* @return The animated value.
*/
public Object getValue(float fraction) {
// Special-case optimization for the common case of only two keyframes
if (mNumKeyframes == 2) {
if (mInterpolator != null) {
fraction = mInterpolator.getInterpolation(fraction);
}
return mEvaluator.evaluate(fraction, mFirstKeyframe.getValue(), mLastKeyframe.getValue());
}
if (fraction <= 0f) {
final Keyframe nextKeyframe = mKeyframes.get(1);
final TimeInterpolator interpolator = nextKeyframe.getInterpolator();
if (interpolator != null) {
fraction = interpolator.getInterpolation(fraction);
}
final float prevFraction = mFirstKeyframe.getFraction();
float intervalFraction =
(fraction - prevFraction) / (nextKeyframe.getFraction() - prevFraction);
return mEvaluator.evaluate(
intervalFraction, mFirstKeyframe.getValue(), nextKeyframe.getValue());
} else if (fraction >= 1f) {
final Keyframe prevKeyframe = mKeyframes.get(mNumKeyframes - 2);
final TimeInterpolator interpolator = mLastKeyframe.getInterpolator();
if (interpolator != null) {
fraction = interpolator.getInterpolation(fraction);
}
final float prevFraction = prevKeyframe.getFraction();
float intervalFraction =
(fraction - prevFraction) / (mLastKeyframe.getFraction() - prevFraction);
return mEvaluator.evaluate(
intervalFraction, prevKeyframe.getValue(), mLastKeyframe.getValue());
}
Keyframe prevKeyframe = mFirstKeyframe;
for (int i = 1; i < mNumKeyframes; ++i) {
Keyframe nextKeyframe = mKeyframes.get(i);
if (fraction < nextKeyframe.getFraction()) {
final TimeInterpolator interpolator = nextKeyframe.getInterpolator();
if (interpolator != null) {
fraction = interpolator.getInterpolation(fraction);
}
final float prevFraction = prevKeyframe.getFraction();
float intervalFraction =
(fraction - prevFraction) / (nextKeyframe.getFraction() - prevFraction);
return mEvaluator.evaluate(
intervalFraction, prevKeyframe.getValue(), nextKeyframe.getValue());
}
prevKeyframe = nextKeyframe;
}
// shouldn't reach here
return mLastKeyframe.getValue();
}
public Animation read(FileHandle handle) {
XmlReader rdr = new XmlReader();
try {
Element root = rdr.parse(handle);
int frameRate = Integer.parseInt(root.getChildByName("FrameRate").getText());
int loopFrame = Integer.parseInt(root.getChildByName("LoopFrame").getText());
Animation anim = new Animation();
anim.FrameRate = frameRate;
anim.LoopFrame = loopFrame;
anim.Textures = new ArrayList<TextureEntry>();
anim.Loop = loopFrame != -1;
anim.Keyframes = new ArrayList<Keyframe>();
for (int i = 0; i < root.getChildCount(); ++i) {
Element ch = root.getChild(i);
if (ch.getName().equals("Texture")) {
TextureRegion reg = imgSrc.getImage(ch.getText());
if (reg != null) {
TextureAtlas.AtlasRegion r = (TextureAtlas.AtlasRegion) reg;
anim.Textures.add(
new TextureEntry(
reg,
new TextureBounds(
new Rectangle(0, 0, r.originalWidth, r.originalHeight),
new Vector2(r.originalWidth / 2, r.originalHeight / 2))));
} else {
throw new Exception("Unable to resolve image: " + ch.getText());
}
}
}
for (int i = 0; i < root.getChildCount(); ++i) {
Element ch = root.getChild(i);
if (ch.getName().equals("Keyframe")) {
Keyframe frame = new Keyframe();
frame.Bones = new ArrayList<Bone>();
frame.FrameNumber = ch.getIntAttribute("frame");
frame.Trigger = ch.getAttribute("trigger", "");
frame.FlipHorizontally = ch.getAttribute("hflip", "False").equals("True");
frame.FlipVertically = ch.getAttribute("vflip", "False").equals("True");
for (int j = 0; j < ch.getChildCount(); ++j) {
Element bone = ch.getChild(j);
if (bone.getName().equals("Bone")) {
Element posElem = bone.getChildByName("Position");
Element sclElem = bone.getChildByName("Scale");
Vector2 pos = new Vector2();
Vector2 scl = new Vector2();
pos.x = Float.parseFloat(posElem.getChildByName("X").getText());
pos.y = Float.parseFloat(posElem.getChildByName("Y").getText());
scl.x = Float.parseFloat(sclElem.getChildByName("X").getText());
scl.y = Float.parseFloat(sclElem.getChildByName("Y").getText());
Bone b = new Bone();
b.Hidden = bone.getChildByName("Hidden").getText().equals("True");
b.Name = bone.getAttribute("name");
b.TextureFlipHorizontal =
bone.getChildByName("TextureFlipHorizontal").getText().equals("True");
b.TextureFlipVertical =
bone.getChildByName("TextureFlipVertical").getText().equals("True");
b.ParentIndex = Integer.parseInt(bone.getChildByName("ParentIndex").getText());
b.TextureIndex = Integer.parseInt(bone.getChildByName("TextureIndex").getText());
b.Rotation = Float.parseFloat(bone.getChildByName("Rotation").getText());
b.Position = pos;
b.Scale = scl;
b.SelfIndex = j;
frame.Bones.add(b);
}
}
frame.SortBones();
anim.Keyframes.add(frame);
}
float fr = 1.0f / anim.FrameRate;
anim.LoopTime = anim.LoopFrame * anim.FrameRate;
anim.Loop = anim.LoopFrame != -1;
for (Keyframe kf : anim.Keyframes) {
kf.FrameTime = fr * kf.FrameNumber;
}
}
return anim;
} catch (Exception ex) {
Gdx.app.log("AnimationReader", "read", ex);
return null;
}
}
