UnityMirror/spine-runtimes
1
0
Fork 0
mirror of https://github.com/EsotericSoftware/spine-runtimes.git synced 2026-02-10 17:18:44 +08:00
Code Issues Packages Projects Releases Wiki Activity

[libgdx] Stretch forces 0 child Y, avoid acos and division.

Browse Source
This commit is contained in:
Nathan Sweet 2021-03-31 18:03:46 +02:00
parent 44b390cc0f
commit f9862b10b3
1 changed files with 10 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
View File

@ -248,7 +248,7 @@ public class IkConstraint implements Updatable {
os2 = 0;
float cx = child.ax, cy, cwx, cwy, a = parent.a, b = parent.b, c = parent.c, d = parent.d;
boolean u = Math.abs(psx - psy) <= 0.0001f;
if (!u) {
if (!u || stretch) {
cy = 0;
cwx = a * cx + parent.worldX;
cwy = c * cx + parent.worldY;
@ -275,7 +275,7 @@ public class IkConstraint implements Updatable {
float tx = (x * d - y * b) * id - px, ty = (y * a - x * c) * id - py;
float dd = tx * tx + ty * ty;
if (softness != 0) {
softness *= psx * (csx + 1) / 2;
softness *= psx * (csx + 1) * 0.5f;
float td = (float)Math.sqrt(dd), sd = td - l1 - l2 * psx + softness;
if (sd > 0) {
float p = Math.min(1, sd / (softness * 2)) - 1;
@ -289,13 +289,15 @@ public class IkConstraint implements Updatable {
if (u) {
l2 *= psx;
float cos = (dd - l1 * l1 - l2 * l2) / (2 * l1 * l2);
if (cos < -1)
if (cos < -1) {
cos = -1;
else if (cos > 1) {
a2 = PI * bendDir;
} else if (cos > 1) {
cos = 1;
a2 = 0;
if (stretch) sx *= ((float)Math.sqrt(dd) / (l1 + l2) - 1) * alpha + 1;
}
a2 = (float)Math.acos(cos) * bendDir;
} else
a2 = (float)Math.acos(cos) * bendDir;
a = l1 + l2 * cos;
b = l2 * sin(a2);
a1 = atan2(ty * a - tx * b, tx * a + ty * b);
@ -309,7 +311,7 @@ public class IkConstraint implements Updatable {
if (d >= 0) {
float q = (float)Math.sqrt(d);
if (c1 < 0) q = -q;
q = -(c1 + q) / 2;
q = -(c1 + q) * 0.5f;
float r0 = q / c2, r1 = c / q;
float r = Math.abs(r0) < Math.abs(r1) ? r0 : r1;
if (r * r <= dd) {
@ -340,7 +342,7 @@ public class IkConstraint implements Updatable {
maxY = y;
}
}
if (dd <= (minDist + maxDist) / 2) {
if (dd <= (minDist + maxDist) * 0.5f) {
a1 = ta - atan2(minY * bendDir, minX);
a2 = minAngle * bendDir;
} else {