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[libgdx] Added wind and gravity controls for the whole skeleton.

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This commit is contained in:
Nathan Sweet 2025-05-21 19:04:56 -04:00
parent 9b596c3856
commit fdc75a3c0e
2 changed files with 51 additions and 11 deletions
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28
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/PhysicsConstraint.java
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@ -120,7 +120,7 @@ public class PhysicsConstraint extends Constraint<PhysicsConstraint, PhysicsCons
ux = bx;
uy = by;
} else {
float a = remaining, i = p.inertia, f = skeleton.data.referenceScale, d = -1, qx = data.limit * delta,
float a = remaining, i = p.inertia, f = skeleton.data.referenceScale, d = -1, m = 0, e = 0, qx = data.limit * delta,
qy = qx * Math.abs(skeleton.scaleY);
qx *= Math.abs(skeleton.scaleX);
if (x || y) {
@ -135,17 +135,20 @@ public class PhysicsConstraint extends Constraint<PhysicsConstraint, PhysicsCons
uy = by;
}
if (a >= t) {
float xs = xOffset, ys = yOffset;
d = (float)Math.pow(p.damping, 60 * t);
float m = p.massInverse * t, e = p.strength, w = p.wind * f * skeleton.scaleX,
g = p.gravity * f * skeleton.scaleY, xs = xOffset, ys = yOffset;
m = t * p.massInverse;
e = p.strength;
float w = f * p.wind * skeleton.scaleX, g = f * p.gravity * skeleton.scaleY,
ax = w * skeleton.windX + g * skeleton.gravityX, ay = w * skeleton.windY + g * skeleton.gravityY;
do {
if (x) {
xVelocity += (w - xOffset * e) * m;
xVelocity += (ax - xOffset * e) * m;
xOffset += xVelocity * t;
xVelocity *= d;
}
if (y) {
yVelocity -= (g + yOffset * e) * m;
yVelocity -= (ay + yOffset * e) * m;
yOffset += yVelocity * t;
yVelocity *= d;
}
@ -188,18 +191,23 @@ public class PhysicsConstraint extends Constraint<PhysicsConstraint, PhysicsCons
if (r > 0) scaleOffset += (dx * c + dy * s) * i / r;
}
if (a >= t) {
if (d == -1) d = (float)Math.pow(p.damping, 60 * t);
float m = p.massInverse * t, e = p.strength, w = p.wind, g = p.gravity, h = l / f, rs = rotateOffset,
ss = scaleOffset;
if (d == -1) {
d = (float)Math.pow(p.damping, 60 * t);
m = t * p.massInverse;
e = p.strength;
}
float rs = rotateOffset, ss = scaleOffset, h = l / f,
ax = p.wind * skeleton.windX + p.gravity * skeleton.gravityX,
ay = p.wind * skeleton.windY + p.gravity * skeleton.gravityY;
while (true) {
a -= t;
if (scaleX) {
scaleVelocity += (w * c - g * s - scaleOffset * e) * m;
scaleVelocity += (ax * c - ay * s - scaleOffset * e) * m;
scaleOffset += scaleVelocity * t;
scaleVelocity *= d;
}
if (rotateOrShearX) {
rotateVelocity -= ((w * s + g * c) * h + rotateOffset * e) * m;
rotateVelocity -= ((ax * s + ay * c) * h + rotateOffset * e) * m;
rotateOffset += rotateVelocity * t;
rotateVelocity *= d;
if (a < t) break;

34
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Skeleton.java
View File

@ -60,7 +60,7 @@ public class Skeleton {
final Array<Posed> resetCache = new Array(true, 16, Posed[]::new);
@Null Skin skin;
final Color color;
float x, y, scaleX = 1, scaleY = 1, time;
float x, y, scaleX = 1, scaleY = 1, time, windX = 1, windY = 0, gravityX = 0, gravityY = 1;
int update;
public Skeleton (SkeletonData data) {
@ -612,6 +612,38 @@ public class Skeleton {
this.y = y;
}
public float getWindX () {
return windX;
}
public void setWindX (float windX) {
this.windX = windX;
}
public float getWindY () {
return windY;
}
public void setWindY (float windY) {
this.windY = windY;
}
public float getGravityX () {
return gravityX;
}
public void setGravityX (float gravityX) {
this.gravityX = gravityX;
}
public float getGravityY () {
return gravityY;
}
public void setGravityY (float gravityY) {
this.gravityY = gravityY;
}
/** Calls {@link PhysicsConstraint#translate(float, float)} for each physics constraint. */
public void physicsTranslate (float x, float y) {
PhysicsConstraint[] constraints = this.physics.items;