我从未听说过,制服可能会使螺旋放缓,他们喜欢汇编时常数(或应当)。

关于使用内在变量,它建议不使用这些变量,因为这些变量在公开的GL3.0和公开的GL核心特征中被折旧,因此无法使用。 为了便于规划,他们被拆除。 你们可以确定你们想要的东西的变数,这是罚款。

So, it s just a matter of programmability, if you are learning and want to use them, it s also fine.

问题在于,在现代的3D图形节目中,APIC对如何绘制你的场面和将更多的控制权转移给开发商的假设较少。 无论是开放式的,还是直接的3D,都是如此。 大部分场地都使用透镜、颜色、正常状态、文字坐标等,导致固定管道。 然而,如果我想要为微粒发动机开出阵地和动脉,那么什么呢? 这将把重力和时间纳入统一的变量。

因此,为了回答你的问题,假定你想要发展现代图象,停止使用任何预先界定的制服,界定你自己的所有。 截至3月,预设的军装已经走过,由你确切界定你需要做什么来做事。 对于固定管道的老板来说,这常常被视为倒退了一步。 “WHAT”? 我是否实施了已经罚款的矩阵? 然而,他们很快发现,当他们看到不再需要打上500个不同的可观的电话,而只是预示着这种说法时,这种代价就会大打折扣。

简言之,生活在两个世界中(使用沙子和所有固定管道功能)是一种坏的想法。 如果固定管道能做你们需要做的一切,就要遵守开放式2号协议,然后才找到你目前熟悉的方法。 如果你需要先进的过滤器,就会渗入开放式3+,而永远不会回头。

在开放式GL-4中,所有预先界定的制服都已经走过,但我通常只是使用旧名称,以便我能够重新使用我的老板。

使用现成制服是一种坏的做法,因为:

1. You start to use them, and they are enough for you.
2. You need more, so you ll make a special logic for custom attributes.
3. You can use custom attributes for everything, and they are supported, so why to keep obsolete built-in logic?
4. You migrate on OpenGL 3+ core context / ES 2 and forget about built-ins.

我早就走过这些步骤,最后说了——如果我最初用纯GL-3开始的话,生活就会比较容易。

关于业绩的原始问题的评论。

• If a built-in uniform has no special behavior then there it is no faster than one that is defined by you. There s nothing in the pre-defined uniforms that you can t do.
• All of the built-in uniforms that I can think of have special behavior. For example, lights are transformed to eye space, lighting model coefficients are pre-multiplied. So the driver may have to do work to keep the uniforms that model the fixed function pipeline in sync. I don t know what implementations will do this work always vs. skip this work when possible...ymmv.
• You may get better flexibility with custom uniforms. For example, you can t put the default uniforms in a UBO even if you want to.
• While a number of people have suggested not using the built-ins, the driver writers may have spent more time optimizing things like matrix transforms than your schedule permits; if you do remove built-ins for custom uniforms, audit performance to make sure your CPU-side performance is good enough.

最后,在不使用UBO的情况下,司机可<>/em>在更换灯具时必须更新所有制服。 因此,更加一致可能会减缓变化。