The loudspeaker device may further include a fourth acoustic driver comprising an axis, arranged along the line so that a projection onto the azimuth plane of the fourth driver axis and the projection of the second driver axis are coincident.

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The projected texture can be visualized as laying on the surface of the near plane of the oriented projection defined by the modelview and projection parts to the transform.

投影紋理則可以被想象成安放在投影方向的近平面上黄软件在线观看，這個投影就是由模型/視圖和投影變換矩陣定義的。

When used in the texture matrix, the coordinates are s, t, and r instead. The projected texture can be visualized as laying on the surface of the near plane of the oriented projection defined by the modelview and projection parts to the transform.

投影紋理則能夠被想象成安放在投影方向的近平面上舔穴在线，這個投影就是由模型/視圖和投影變換矩陣定義的91精品免费大秀。

This approach utilizes the fact that if the centerline of target image gets through the center point of the image plane,perspective projection and parallel projection must have the same image-forming property.

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An optical element such as a rear projection screen for an image display device comprises at least two substantially rigid sheet members each having a first major surface and a second major surface providing a plane of incidence and a plane of emergence, respectively, through which light is transmitted sequentially. A first sheet member comprises a Fresnel lens, and a second sheet member comprises a lenticular lens array on each of the major surfaces thereof.

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The modelview transform is used in the same way as it is in the OpenGL viewing pipeline, to move the viewer to the origin and the projection centered along the negative z axis. In this case, viewer can be thought of a light source, and the near clipping plane of the projection as the location of the texture image, which can be thought of as printed on a transparent film.

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The modelview transform is used in the same way as it is in the OpenGL viewing pipeline, to move the viewer to the origin and the projection centered along the negative z axis. In this case, viewer can be thought of a light source, an d the near clipping plane of the projection as the location of the texture ima ge, which can be thought of as printed on a transparent film.

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As the projector can conceptually be regarded as camera acting in reverse, the relation between projection plane of the projector and imaging plane of the camera is fixed.

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On the basis of Earth surface space using reference ellipsoid as height basis, map space using Gauss-Kruger projection plane as height basis, a viewpoint is proposed that map projection actually establishes corresponding relationship between the height bases of two different spaces above. From the viewpoint of projection and visible representation, the relationships among earth surface space, RS imagery space and map space are analyzed; the differences among different representations of earth surface space are identified theoretically; virtual reality is applied to the representation of land surface space, and a prototype of real 3D virtual reality system based on spatial information is developed. By means of digital simulation, virtual reality representation of land surface space in visual image space is realized.

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It is inevitable that the length distortion will happen when the control points are linked to the State Gauss Plane Coordinates System in the plane control surveying for speedways,by which the construction elevation plane would separated from the projection plane of control surveying.

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