just brainstorming a solution. idk if this'll work perfectly but its what i could come up with in the moment
pseudocode:
// adjust values as needed
float gravity; // gravity will affect how fast it swings
float drag; // how quickly the piece settles and stops swaying, 0 to 1
float mouseVelMult; // adjust mult to make the piece seem heavier or lighter
float sway = 0; // angular vel
Vector2 prevMousePos;
Update() {
// x just for side-to-side sway
float mouseXVel = (curMousePos - prevMousePos).x / deltaTime;
float curAngle = transform.rotation; // assuming chess piece's pivot is the grab point
// fake pendulum physics
// -mouse vel because piece should swing in the opposite direction the mouse is moving
sway += -mouseXVel * mouseVelMult;
// inverse sign (1 or -1) of the cur angle so gravity is always pushing towards angle of 0
sway += (curAngle < 0 ? 1 : -1) * gravity * sin(curAngle);
// drag is scaled based on sway to keep it tending towards 0
sway += -sway * drag;
// prevents sway from wiggling between super small values
if (abs(sway) < 0.01f)
sway = 0;
transform.rotation += sway * deltaTime;
float newAngle = transform.rotation;
// clamp rotation to prevent it from spinning around wildly
transform.rotation = Clamp(transform.rotation, -maxAngle, maxAngle);
// if rotation was clamped, sway should be stopped to prevent floating
if (transform.rotation != newAngle)
sway = 0;
prevMousePos = curMousePos;
}
thick bolt
opaque jewel
earnest inlet