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Ball, or called the player ball, is the core of Ballance and the only element that can be controlled py the player directly. The mean diameter of every type of ball is 4 meters: the shapes of wood ball and stone ball are perfectly round, while the paper ball is irregular, with its maximum width being 5 meters.
目录
Types
Wood ball
The default type of ball when the player starts at Level 1–12. It has a mass of 1.9 tons, with a brownish-yellow wooden texture. 是由带有些许青斑和划痕的木条粘合拼接而成。
质量轻且灵活，是三种球类中手感最为均衡的。它可以推动各种机关，但需要一定的助跑；遇见大量机关时（如大量箱子）显得无能为力。此外，它可以被最少6个风扇叠加吹起；理论上可以跨过无数个箱式浮板（需要高技术水平）。
Stone ball
13关出生时默认的球。质量为10吨。外观总体上呈青绿色，表面有大量的坑。它的力量大，可以无需助跑推动各种机关；沙袋不容易阻挡它；但它的惯性巨大，不易操控。不过由此也可以被用在自制地图中通过“过山车”式设计。事实上，第9、13关就有了这种设计。它还可以使软木桥断裂。此外，它可以被最少32个风扇叠加吹起；理论上可以跨过3个箱式浮板（需要高技术水平）。
Paper ball
质量为0.2吨。第一关中不存在纸球变球器。外观上是由数张报纸粘合而成的一个不规则白色球体，棱角分明。最大特点是十分轻盈，可被风扇吹起，不会压开箱式浮板；但是不能推动大多数机关（升降机围墙可以被纸球用力助跑推开；推板在特定情况下能够被推开；箱子可以非常困难地推开；单摆可以被轻松推开）。此外，由于其表面不平整，因此不能借助定位杆对齐通过单轨。
Physical parameters
Below are parameters of three types of balls (bold denotes difference from prop balls):
| Type | Diameter of hitbox (meter) | Friction | Elasticity | Mass (ton) | Linear damping | Rotational damping | Force |
|---|---|---|---|---|---|---|---|
| Wood | 4.0 | 0.8 | 0.2 | 1.9 | 0.9 | 0.1 | 0.43 |
| Stone | 4.0 | 0.5 | 0.1 | 10.0 | 0.3 | 0.1 | 0.92 |
| Paper | Mean 4.0, maximum 5.0 | 0.5 | 0.4 | 0.2 | 1.5 | 0.1 | 0.065 |
Note: "Force" is the force on the ball when it is made to roll by the player pressing down the keyboard; as a result, it is meaningless to the prop balls.
For references, below are parameters of prop balls:
| Type | Diameter of hitbox (meter) | Friction | Elasticity | Mass (ton) | Linear damping | Rotational damping |
|---|---|---|---|---|---|---|
| Wood | 4.0 | 0.6 | 0.2 | 2.0 | 0.6 | 0.1 |
| Stone | 4.0 | 0.7 | 0.1 | 10.0 | 0.2 | 0.1 |
| Paper | Mean 4.0, maximum 5.0 | 0.5 | 0.4 | 0.2 | 1.5 | 0.1 |