绝对/分层方向有什么区别？如何成功更改坐标系？ [英] what is the difference between absolute/hierarchical orientation and how do i successfully change the coordinate system?

问题描述

Hello Guys， 

Hello Guys, 

我目前正在使用KINECT NUI作为输入的应用程序（C ++），我尝试移动基于COLLADA的模型坐标系。我在理解KINECT API时遇到了一些问题。

i am currently working on an application(C++) which uses KINECT NUI as input, and i try to move a model based on the COLLADA coordinate system. I have some problems understanding the KINECT API..

绝对方向和层次方向之间究竟有什么区别？这只是坐标系，还是联合方向已经相互成倍？

What exactly is the difference between absolute orientation and hierarchical orientation? Is this only the coordinate system, or are the joint orientation already multiplied by each other?

COLLADA格式使用Z向上X向右和Y向远。据我所知，当我使用绝对方向时，Y向上，X向右，Z向我，我如何成功地将输入坐标系更改为坐标系
i想要？

The COLLADA format uses Z up X to the right and Y in the far. As far is i understand this, when i use absolute orientation the Y is up, X is to the right and Z is towards me, how do i successfully change the input coordinate system to the coordinate system i want?

推荐答案

关节的层次方向相对于前一个关节表示。绝对方向均相对于相机表示。

The hierarchical orientation for a joint is expressed relative to the previous joint.. The absolute orientations are all expressed relative to the camera.

将骨骼想象成一棵树，根部位于臀部中心关节处。对于每个给定的关节，分层方向是相对于树中的父关节的方向。同一关节的绝对方向是将
乘以所有祖先的等级方向，一直回到根。

Think of the skeleton as a tree, with the root at the hip center joint. For every given joint, the hierarchical orientation is the orientation relative to the parent joint in the tree. The absolute orientation at the same joint is the result of multiplying the hierarchical orientations of all of the ancestors, all the way back to the root.

根（臀部中心）是一个特例。它的分层方向表示由三个髋关节（中心，左，右）相对于相机形成的平面的方向。

The root (hip center) is a special case. Its hierarchical orientation indicates the orientation of the plane formed by the three hip joints (center, left, right), relative to the camera.

本文
包含有用的图解释。

This article contains helpful diagrams to explain it all.

这篇关于绝对/分层方向有什么区别？如何成功更改坐标系？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！