确定SCNBox的哪一侧被触摸，Scene Kit iOS [英] Determine which side of SCNBox got touched, Scene Kit ios

问题描述

我正在使用Scene Kit，并创建了一个SCNBox。在框的前面，我希望这样，如果单击前面的左侧，则发生 A，如果单击前面的右侧，则发生 B。我该如何实现。我检查了堆栈，但是大多数答案都涵盖了是否触摸到某个节点，而不是该节点的一部分。

I am using Scene Kit and have created an SCNBox. On the front face of the box I want it so "A" happens if the left side of the front face gets clicked, and "B" happens if the right side of the front face gets clicked. How can I achieve this. I checked on stack but most answers cover if a node gets touched, not part of a node.

推荐答案

SCNHitTestResult 具有 geometryIndex ，它将为您提供被击中的几何 element （即立方体面）的索引。它还具有 faceIndex 属性，将为您提供该元素中原始元素的索引。

SCNHitTestResult has a geometryIndex that will give you the index of the geometry element that was hit (i.e. the cube face). It also has a faceIndex property that will give you the index of the primitive in this element.

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