[英]3d object depth parameter affects perceived width
I have created one RectangularPrism
with default camera in Rajawali 1.1.777: 我在Rajawali 1.1.777中使用默认相机创建了一个
RectangularPrism
:
RectangularPrism p = new RectangularPrism(2f, 2f, xf);
Depending on x (depth) the perceived width on the Android screen varies. 根据x(深度),Android屏幕上的感知宽度会有所不同。
So from a Rajawali/OpenGL perspective how and why does the depth parameter affect the perceived width of the object on the screen? 那么从Rajawali / OpenGL的角度来看,深度参数如何以及为什么会影响屏幕上对象的感知宽度? Since the width (2f) is kept static shouldn't the prism always fill the screen in the same way?
由于宽度(2f)保持不变,棱镜不应该总是以相同的方式填充屏幕吗?
0.1f: 0.1F:
1f: 1F:
2f: 2F:
Answer from https://github.com/Rajawali/Rajawali/issues/1883 来自https://github.com/Rajawali/Rajawali/issues/1883的答复
The default camera is a Perspective Camera, faces in the distance appear smaller than faces close by. 默认相机是“透视相机”,远处的面孔看起来小于附近的面孔。 The default camera is located at 0,0,4 and looks at 0,0,0.
默认摄像头位于0,0,4,外观为0,0,0。 If one places a RectangularPrism of size 2,2,0.5 at 0,0,0, the distance between the camera and the closest face is 3.75.
如果将一个大小为2,2,0.5的RectangularPrism放置在0,0,0,则相机和最近的脸部之间的距离为3.75。 If one places a RectangularPrism of size 2,2,2 at 0,0,0, the distance between the camera and the closest face is only 3, and so the closest face appears bigger.
如果将一个大小为2,2,2的RectangularPrism放置在0,0,0,则相机和最近的脸部之间的距离仅为3,因此最近的脸部显得更大。
If perspective is not desired, one may instantiate an Orthographic Camera and getCurrentScene().addAndSwitchCamera(orthographicCamera). 如果不需要透视,则可以实例化一个Orthographic Camera并获取getCurrentScene()。addAndSwitchCamera(orthographicCamera)。
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