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Improved updateLocalTransform.

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This commit is contained in:
NathanSweet 2016-06-01 14:44:11 +02:00
parent a990d6dfdd
commit 86e9a75846
1 changed files with 32 additions and 15 deletions
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47
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java
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@ -209,25 +209,42 @@ public class Bone implements Updatable {
* transform values may differ from the original values but are functionally the same. */
public void updateLocalTransform () {
Bone parent = this.parent;
if (parent != null) {
float a = parent.a, b = parent.b, c = parent.c, d = parent.d;
float invDet = 1 / (a * d - b * c);
float x = worldX - parent.worldX, y = worldY - parent.worldY;
x = (x * d * invDet - y * b * invDet);
y = (y * a * invDet - x * c * invDet);
}
shearX = 0;
scaleX = (float)Math.sqrt(a * a + c * c);
if (scaleX > 0.00001f) {
float det = a * d - b * c;
shearY = atan2(a * b + c * d, det) * radDeg;
scaleY = det / scaleX;
if (parent == null) {
x = worldX;
y = worldY;
rotation = atan2(c, a) * radDeg;
scaleX = (float)Math.sqrt(a * a + c * c);
scaleY = (float)Math.sqrt(b * b + d * d);
float det = a * d - b * c;
shearX = 0;
shearY = atan2(a * b + c * d, det) * radDeg;
return;
}
float pa = parent.a, pb = parent.b, pc = parent.c, pd = parent.d;
float pid = 1 / (pa * pd - pb * pc);
float dx = worldX - parent.worldX, dy = worldY - parent.worldY;
x = (dx * pd * pid - dy * pb * pid);
y = (dy * pa * pid - dx * pc * pid);
float ia = pid * pd;
float id = pid * pa;
float ib = pid * pb;
float ic = pid * pc;
float ra = ia * a - ib * c;
float rb = ia * b - ib * d;
float rc = id * c - ic * a;
float rd = id * d - ic * b;
shearX = 0;
scaleX = (float)Math.sqrt(ra * ra + rc * rc);
if (scaleX > 0.0001f) {
float det = ra * rd - rb * rc;
scaleY = det / scaleX;
shearY = atan2(ra * rb + rc * rd, det) * radDeg;
rotation = atan2(rc, ra) * radDeg;
} else {
scaleX = 0;
scaleY = (float)Math.sqrt(rb * rb + rd * rd);
shearY = 0;
scaleY = (float)Math.sqrt(b * b + d * d);
rotation = 90 - atan2(d, b) * radDeg;
rotation = 90 - atan2(rd, rb) * radDeg;
}
appliedRotation = rotation;
appliedScaleX = scaleX;