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fix: make elastic deformation direction-aware #8

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fix: make elastic deformation direction-aware #8

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24 changes: 21 additions & 3 deletions core/src/main/java/com/qmdeve/liquidglass/util/LiquidTracker.java
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Original file line number Diff line number Diff line change
Expand Up @@ -124,11 +124,29 @@ private float[] getLiquidScale() {
velocityTracker.computeCurrentVelocity(1);
float velocityX = velocityTracker.getXVelocity();
float velocityY = velocityTracker.getYVelocity();
float velocity = (float)Math.sqrt(velocityX * velocityX + velocityY * velocityY);

// Calculate deformation separately for X and Y directions
// Stretch along movement direction, compress perpendicular to it
float absVx = Math.abs(velocityX);
float absVy = Math.abs(velocityY);

// Deformation intensity factor, adjust this value to control the degree of deformation
float stretchFactor = 0.5f;

float scaleX, scaleY;
if (absVx > absVy) {
// Horizontal movement dominant: stretch X axis, compress Y axis
scaleX = 1f + absVx * stretchFactor;
scaleY = 1f - absVx * stretchFactor * 0.5f;
} else {
// Vertical movement dominant: stretch Y axis, compress X axis
scaleX = 1f - absVy * stretchFactor * 0.5f;
scaleY = 1f + absVy * stretchFactor;
}

return new float[] {
Math.clamp(1f + velocity * 0.5f, 0.6f, 1.4f),
Math.clamp(1f - velocity * 0.5f, 0.6f, 1.4f)
Math.clamp(scaleX, 0.6f, 1.4f),
Math.clamp(scaleY, 0.6f, 1.4f)
};
}

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