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[libgdx] Scale physics wind and gravity for translation, scale rotation for shear X.

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This commit is contained in:
Nathan Sweet 2023-10-01 14:37:49 -04:00
parent 831ec8f622
commit 008541ef8e
1 changed files with 16 additions and 20 deletions
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36
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/PhysicsConstraint.java
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@ -121,12 +121,12 @@ public class PhysicsConstraint implements Updatable {
while (remaining >= step) {
remaining -= step;
if (x) {
xVelocity += (wind - xOffset * strength - friction * xVelocity) * mass;
xVelocity += (wind * 500 - xOffset * strength - xVelocity * friction) * mass;
xOffset += xVelocity * step;
xVelocity *= damping;
}
if (y) {
yVelocity += (-gravity - yOffset * strength - friction * yVelocity) * mass;
yVelocity += (-gravity * 500 - yOffset * strength - yVelocity * friction) * mass;
yOffset += yVelocity * step;
yVelocity *= damping;
}
@ -134,17 +134,17 @@ public class PhysicsConstraint implements Updatable {
float r = br + rotateOffset * degRad;
cos = cos(r);
sin = sin(r);
}
if (rotateOrShear) {
rotateVelocity += (length * (-wind * sin - gravity * cos) - rotateOffset * strength - friction * rotateVelocity)
* mass;
rotateOffset += rotateVelocity * step;
rotateVelocity *= damping;
}
if (scaleX) {
scaleVelocity += (wind * cos - gravity * sin - scaleOffset * strength - friction * scaleVelocity) * mass;
scaleOffset += scaleVelocity * step;
scaleVelocity *= damping;
if (rotateOrShear) {
rotateVelocity += (length * (-wind * sin - gravity * cos) - rotateOffset * strength - rotateVelocity * friction)
* mass;
rotateOffset += rotateVelocity * step;
rotateVelocity *= damping;
}
if (scaleX) {
scaleVelocity += (wind * cos - gravity * sin - scaleOffset * strength - scaleVelocity * friction) * mass;
scaleOffset += scaleVelocity * step;
scaleVelocity *= damping;
}
}
}
@ -192,16 +192,12 @@ public class PhysicsConstraint implements Updatable {
if (rotateOrShear) {
float r = rotateOffset * mix;
if (data.rotate) bone.rotateWorld(r);
if (data.shearX) {
if (data.rotate) {
r *= 0.5f;
bone.rotateWorld(r);
}
float t = (float)Math.tan(r * degRad);
float t = (float)Math.tan(r * 0.5f * degRad);
bone.b += bone.a * t;
bone.d += bone.c * t;
} else
bone.rotateWorld(r);
}
}
if (scaleX) {
float s = 1 + scaleOffset * mix;