基本圆物理碰撞逻辑

Question

https://scratch.mit.edu/projects/12571073/#editor

至少是反射碰撞背后的基本逻辑

感谢。

这是我的迅速尝试，但欢迎使用任何语言。

let entranceAngle = atan2(projectile.force.dy, projectile.force.dx)
let radius = distance(projectile.position, bubble.position)
let power = distance(dx: projectile.force.dx, dy: projectile.force.dy)
let pivotAngle = asin((projectile.position.y - bubble.position.y) / radius)
let exitAngle = 2 * pivotAngle - entranceAngle

projectile.applyForce(CGVector(
    dx: power * cos(exitAngle),
    dy: power * sin(exitAngle)))

Answer 1

好的，我想出来了，不管这对谁有所帮助：

let normalVector = CGVector(
    dx: projectile.position.x - bubble.position.x,
    dy: projectile.position.y - bubble.position.y).normalized
let dotProduct =
    normalVector.dx * projectile.force.dx +
    normalVector.dy * projectile.force.dy
let resultingForce =
    projectile.force - 2 * dotProduct * normalVector