Question

我一直在搜寻所有夜晚,但找不到信息一眼看,甚至可能的话,这种信息非常令人不安。

I m使用Java3D,可以推测如何在世界空间轮换摄像机。

My left/right, and up/down rotation both happen on local space. Meaning that if I move left and right, everything looks fine. However if I look 90 degrees down, then look 90 degrees right, everything appears to be on its side.

目前,我做了以下工作。这将产生上述效果:

TransformGroup cam = universe.getViewingPlatform().getViewPlatformTransform();
Transform3D trfcam = new Transform3D();
cam.getTransform(trfcam);

trfcam.mul(Camera.GetT3D()); //Gets a Transform3D containing how far to rotate left/right and how far to move left/right/forward/back

trfcam.mul(Camera.GetRot()); //Gets a t3d containing how far to rotate up/down

cam.setTransform(trfcam);

Alternatively, one thing I tried was rotating the root, but that rotates around 0, so if I ever move the camera away from 0, it goes bad. Is there something available on the web that would talk me through how to achieve this kind of thing? I ve tried a lot of different things but just can t seem to get my head around it at all. I m familiar with the concept, as I ve achieved it in Ogre3D, just not familiar with the law of the land in J3D.

提前收到答复:

Answer 1

储存每条轴心(x和 y)轮值,如果你试图围绕轴心进行轮值,扭转轮值,轮值为x,轮值为x,然后按轮值轮流。

我不相信我正确理解你的第二个问题。由于观众和模型转变是双重的,你可以通过改变世界本身来模拟照相移动。如果你愿意翻译你正在轮值的x和轴心,那么,在你正在使用的主要变革集团中添加另一个转变集团,并在新集团中进行变革。

Edit:第一种解决办法是相当缓慢的,因此,在你必须做的3个改革中,你可以实现变革3D:

你们已经轮值X轴(Translate3D xrot),现在你们需要轮 rotat:

Translate3D yrot = new Translate3D();  
yrot.rotY(angle); 

Translate3D temp = xot; 
xrot.mul(yrot);  // Dont forget the reverse order. xrot is the previous translate 
xrot.mul(yrot);  // xrot = xrot * yrot * xrot^-1
temp.transpose();  // Get the reverse transform of the old transform
xrot.mul(temp);

yrot = xrot;  // Store it for future rotation around x axis
cam.setTransform(yrot);

它对你们进行的许多转变也发挥了类似作用:扭转了以前所做的转变,改革了老变革。我希望它能够提供帮助。

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