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[libgdx] Fixed one bone IK with disable inherit rotation/scale/reflection.

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This commit is contained in:
NathanSweet 2019-12-18 18:01:52 +01:00
parent 8c8b08f80b
commit 203a648ae9
1 changed files with 28 additions and 4 deletions
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32
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
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@ -177,10 +177,28 @@ public class IkConstraint implements Updatable {
if (bone == null) throw new IllegalArgumentException("bone cannot be null.");
if (!bone.appliedValid) bone.updateAppliedTransform();
Bone p = bone.parent;
float id = 1 / (p.a * p.d - p.b * p.c);
float x = targetX - p.worldX, y = targetY - p.worldY;
float tx = (x * p.d - y * p.b) * id - bone.ax, ty = (y * p.a - x * p.c) * id - bone.ay;
float rotationIK = atan2(ty, tx) * radDeg - bone.ashearX - bone.arotation;
float pa = p.a, pb = p.b, pc = p.c, pd = p.d;
float rotationIK = -bone.ashearX - bone.arotation, tx, ty;
switch (bone.data.transformMode) {
case onlyTranslation:
tx = targetX - bone.worldX;
ty = targetY - bone.worldY;
break;
case noRotationOrReflection:
rotationIK += atan2(pc, pa) * radDeg;
float ps = pa * pa + pc * pc;
if (ps > 0.0001f) {
ps = Math.abs(pa * pd - pb * pc) / ps;
pb = -pc * ps;
pd = pa * ps;
}
default:
float x = targetX - p.worldX, y = targetY - p.worldY;
float d = pa * pd - pb * pc;
tx = (x * pd - y * pb) / d - bone.ax;
ty = (y * pa - x * pc) / d - bone.ay;
}
rotationIK += atan2(ty, tx) * radDeg;
if (bone.ascaleX < 0) rotationIK += 180;
if (rotationIK > 180)
rotationIK -= 360;
@ -188,6 +206,12 @@ public class IkConstraint implements Updatable {
rotationIK += 360;
float sx = bone.ascaleX, sy = bone.ascaleY;
if (compress || stretch) {
switch (bone.data.transformMode) {
case noScale:
case noScaleOrReflection:
tx = targetX - bone.worldX;
ty = targetY - bone.worldY;
}
float b = bone.data.length * sx, dd = (float)Math.sqrt(tx * tx + ty * ty);
if ((compress && dd < b) || (stretch && dd > b) && b > 0.0001f) {
float s = (dd / b - 1) * alpha + 1;