c#

Animation synchronization with soundtrack in Unity

Sometimes we might need to play the animations together with a separate soundtrack in Unity. However, animations and the soundtrack may be out of sync due to frame drop or other performance problems even we start playing them in the same frame. A simple but not efficient solution is to force the animation to play the exact frame as the soundtrack ever frame. Below is a code example.

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Rigidbody.Constraints in Unity

We all know that physics affects the sense of reality greatly in VR development. As a developer, I always hope to make the physical behaviors of the virtual experience the same as the reality as far as possible. However, I met a problem several days ago. I created a vase with some roses in it, and they are separated Game Objects. However, during the playtest, roses in the vase “jumped out” strangely when I tried to lift the vase. I checked and rebuilt the colliders on the vase and the roses carefully, set the Collision Detection on the Rigidbody to be Continuous Dynamic, tried to bond the roses on the vase as its children, but all of them failed to erase the bug completely. However, my intuition told me that the problem must be related to the physical system, therefore must has something to do with the Rigidbody component.

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Bitfields for multiple flags in Unity

Demand

Supposed we’re going to develop a shooting game. Characters in our game have several flags such as IsMoving, IsShooting, IsLoading, IsHiding… All these behaviors might happen simultaneously (or, of course, individually), say, the character can shoot while moving, can load his gun while hiding. How are we going to set these flags?

The simplest way might be allocating bools for them respectively. However, bools in C# are stored as ints and the compiler might not be able to combines/consolidates them. So if there’re 16 bools, that’s an allocation of 16 ints – wasteful. In addition, if one of those combinations (eg. IsMoving + IsShooting) are frequently used, the codes might be burden.

Following are some tips for such situation.

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[Quote] C#中的委托和事件

委托 和 事件在 .Net Framework中的应用非常广泛,然而,较好地理解委托和事件对很多接触C#时间不长的人来说并不容易。它们就像是一道槛儿,过了这个槛的人,觉得真是太容易了,而没有过去的人每次见到委托和事件就觉得心里别(biè)得慌,混身不自在。本文中,我将通过两个范例由浅入深地讲述什么是委托、为什么要使用委托、事件的由来、.Net Framework中的委托和事件、委托和事件对Observer设计模式的意义,对它们的中间代码也做了讨论。

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