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worldToLocalRotation and localToWorldRotation utility methods.

Browse Source 
http://esotericsoftware.com/forum/RegionAttachment-offset-7662?p=35770#p35770
This commit is contained in:
NathanSweet 2016-12-24 17:22:11 +01:00
parent cdaaf295b2
commit 12c986806d
1 changed files with 23 additions and 23 deletions
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46
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java
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@ -380,29 +380,6 @@ public class Bone implements Updatable {
return (float)Math.sqrt(b * b + d * d);
}
public float worldToLocalRotationX () {
Bone parent = this.parent;
if (parent == null) return arotation;
return atan2(parent.a * c - parent.c * a, parent.d * a - parent.b * c) * radDeg;
}
public float worldToLocalRotationY () {
Bone parent = this.parent;
if (parent == null) return arotation;
return atan2(parent.a * d - parent.c * b, parent.d * b - parent.b * d) * radDeg;
}
/** Rotates the world transform the specified amount. {@link #updateWorldTransform()} will need to be called on any child
* bones, recursively. */
public void rotateWorld (float degrees) {
float cos = cosDeg(degrees), sin = sinDeg(degrees);
a = cos * a - sin * c;
b = cos * b - sin * d;
c = sin * a + cos * c;
d = sin * b + cos * d;
appliedValid = false;
}
/** Computes the individual applied transform values from the world transform. This can be useful to perform processing using
* the applied transform after the world transform has been modified directly (eg, by a constraint).
* <p>
@ -480,6 +457,29 @@ public class Bone implements Updatable {
return local;
}
/** Transforms a world rotation to a local rotation. */
public float worldToLocalRotation (float worldRotation) {
float sin = sinDeg(worldRotation), cos = cosDeg(worldRotation);
return atan2(a * sin - c * cos, d * cos - b * sin) * radDeg;
}
/** Transforms a local rotation to a world rotation. */
public float localToWorldRotation (float localRotation) {
float sin = sinDeg(localRotation), cos = cosDeg(localRotation);
return atan2(cos * c + sin * d, cos * a + sin * b) * radDeg;
}
/** Rotates the world transform the specified amount. {@link #updateWorldTransform()} will need to be called on any child
* bones, recursively. */
public void rotateWorld (float degrees) {
float cos = cosDeg(degrees), sin = sinDeg(degrees);
a = cos * a - sin * c;
b = cos * b - sin * d;
c = sin * a + cos * c;
d = sin * b + cos * d;
appliedValid = false;
}
public String toString () {
return data.name;
}