Method for dragging camera to make displacement in scene based on unity3D

Abstract

The invention provides a method for dragging a camera to make displacement in a scene based on unity3D. The method comprises the steps of judging whether the camera is an orthogonal camera; if so, calculating horizontal displacement X and vertical displacement Y according to a size of the camera, wherein X is equal to 2*size*(width-to-height ratio of frame); Y is equal to 2*size; the width-to-height ratio of the frame is a width-to-height ratio of a built-in screen of a unity3D engine; and the size of the camera is one half of visual field width of the orthogonal camera; if not, acquiring a straight line distance d from the camera to a center point of a visual field and an FOV (field of view) of the camera and calculating the horizontal displacement X and the vertical displacement Y, wherein X is equal to d*2*tan(FOV / 2) and Y is equal to X / (width-to-height ratio of frame); and finally correcting X and Y according to a rotation angle alpha of the camera to obtain corrected horizontal displacement X1 and corrected vertical displacement Y1 as target values, and making the displacement by following the target values at a certain rate in an interpolation manner to achieve a smooth movement effect. According to the method, an actual displacement effect is precisely calculated; an interpolation rate is flexible; the dragging displacement smoothness is improved; and an application scope is wide.

Description

technical field [0001] The invention relates to a method for dragging a camera to move in a scene based on unity3D. Background technique [0002] The viewing angle of the camera in the game is a cone-shaped viewing angle, which is an isosceles triangle from a cross-section. The camera is at the position of the middle vertex, and the FOV (field of view) of the camera is the inner angle of the vertex. In the game, it is often necessary to use operations such as dragging the mouse on the computer and sliding the finger on the mobile device to complete the scene movement and browse other areas. However, there is a distance between the camera and the scene. In the process, there are more or less errors, and the scene cannot be completely followed by the finger dragging. If smooth interpolation is not performed during the dragging process, the entire operation will be very blunt. Contents of the invention [0003] The technical problem to be solved by the present invention is ...

AI Technical Summary

Problems solved by technology

In the game, it is often necessary to use operations such as dragging the mouse on the computer and sliding the finger on the mobile device to complete the scene movement and browse other areas. However, there is a distance between the camera and the scene. In the process, there are more or less errors, and it is impossible to achieve the scene to completely follow the finger dragging. If there is no smooth interpolation during the dragging process, the entire operation will be very blunt

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