TWI490628B - Virtual reality video control method - Google Patents

Description

Virtual reality video control method

The invention relates to a virtual reality video control method, in particular to a method for comparing data differences between two cameras before and after, and obtaining a more natural camera image switching.

In a virtual reality scene, a camera is composed of a special set of data structures, which is used to display a specific direction of the screen for the user to view. Therefore, in the screen presentation, multiple cameras are needed to give the user a more natural appearance. The browsing feeling, setting various parameters such as Aspect Ratio, Field of View, and Initial Condition on the shooting makes it necessary to spend a lot of time when setting up multiple sets of cameras. And manpower, and when using multiple sets of cameras at a time, the initial condition data burden generated is large, which will reduce the performance of the virtual scene development and execution.

In view of the above disadvantages of the prior art, the main object of the present invention is to provide a virtual reality video control method, which compares the data difference between the two cameras before and after, and performs a smart selection processing method, thereby obtaining a more natural camera switching effect.

Another object of the present invention is to provide a virtual reality video control method using a single camera object when the user needs to perform other photography. When the machine is switched, the control module only records information such as the World Matrix of the camera in an array, which can save a large number of camera initial condition data and setting steps.

For the purpose of the present invention, the present invention provides a virtual reality video control method, which includes providing a plurality of cameras, storing video data generated by each camera, and displaying video information of one of the plurality of cameras to receive a conversion request. The video data of the displayed camera is captured, and the video data of the camera is stored, and the data difference between the two cameras is compared by a control module, wherein the video data includes the camera number, the world matrix, and the Boolean property (Boolean). And the three-dimensional vector, the video data of each camera is processed to obtain a more natural camera switching effect.

The above summary, the following detailed description and the accompanying drawings are intended to further illustrate the manner, the Other objects and advantages of the present invention will be described in the following description and drawings.

The embodiments of the present invention are described below by way of specific examples, and those skilled in the art can readily appreciate other advantages and functions of the present invention from the disclosure herein.

Please refer to FIG. 1 , which is a schematic diagram of a preferred implementation procedure of a virtual reality video control method according to the present invention. As shown in the figure, the steps include: Step 1: providing a plurality of cameras and storing video data generated by each camera; step 2: displaying video data of one of the cameras of the plurality of cameras; step 3: receiving a conversion request; and step 4: capturing video data of the displayed camera And storing the video data of the camera; Step 5: processing the video data of each camera by comparing the data difference between the two cameras before and after the control module; Step 6: thereby obtaining a more natural camera switching effect.

The video data mentioned in step 1 includes a camera number, a world matrix, a Boolean attribute, and a three-dimensional vector. The camera number is automatically generated by the program. When the camera switches, the camera number is determined by the camera number. The number is small and the number is large. The world matrix is used to record the position and direction of each camera. The Boolean attribute is used to record whether the camera needs to stop switching. If it is true, switch to this camera. Will stop switching, wait for the user to make the correct interaction and then switch to the next; if false (False), it will switch to the next camera, the Boolean property is used for camera switching, during the switching process, the user It takes several cameras to switch continuously to go to the angle that needs to be presented. At this time, a set of (several) camera information is created. The last one sets the Boolean property to true. After the user interacts, it switches to another camera. Information, the three-dimensional vector is used to record the Z-axis direction of the current camera.

Please refer to FIG. 2 , which is a schematic diagram of two different camera movement routes of the virtual reality video control method according to the present invention. As shown in the figure, the route rotated by the specific object A should be the C route, and the camera is composed of A. Moving directly to the right, but in order to reduce the user's operational difficulties, we do not record the relevant information of A, but the information of the previous camera to establish the movement route between the two cameras, so the B route is established. Due to the lack of information of A, the distance between B and A cannot be consistent during the movement of B. Therefore, it is not recommended to use more than 90 degrees in one lens movement. When the camera is switched, the control module will Compare the information of the two cameras before and after, and then perform the following switching actions:

1. Smooth movement: The position of the last two cameras is different, but when the Z-axis direction is the same, it means that the camera is moving smoothly. The program module uses Bezier Progression, the Virtools built-in Behavior Block, to slowly switch the world matrix of the first camera to the data value of the second camera.

2. Rotation: The current two cameras have different Z-axis directions, and when the positions are the same, the camera performs the rotation motion centering on itself. The effect of the rotation is like the first person perspective, and the user rotates the head to the left or right or up and down. The program module is the same as the smooth moving program, and the camera is gradually converted to the Z axis.

3. Rotate the specific object as the center: When there are differences between the position of the last two cameras and the direction of the Z axis, the program module performs the specific object The action of the center rotation. In fact, it is more complicated to add the target object, so we use the camera to move and rotate at the same time, that is, the above two control methods are carried out simultaneously. Since this method is adopted, the angle of one rotation is limited. If it exceeds 90 degrees, it is recommended to replace it with multiple camera switches, otherwise abnormal camera movement will be caused.

The above-described embodiments are merely illustrative of the features and functions of the present invention and are not intended to limit the scope of the technical scope of the present invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the scope of the claims described below.

1, 2, 3, 4, 5, 6‧ ‧ ‧ virtual reality video control method preferred embodiment steps

A, B, C‧‧‧Two different camera movement routes for virtual reality video control methods

1 is a schematic diagram of steps of a preferred embodiment of a virtual reality video control method according to the present invention; and FIG. 2 is a schematic diagram of two different camera movement paths of the virtual reality video control method of the present invention.

1, 2, 3, 4, 5, 6‧ ‧ ‧ virtual reality video control method preferred embodiment steps

Claims (10)

A virtual reality video control method includes: providing a plurality of cameras and storing video data generated by each camera; displaying one of the plurality of video cameras; receiving a conversion request; capturing video information of the displayed camera, and storing The video data of the camera is processed by a control module to compare the data of the two cameras before and after, and the video data of each camera is processed to obtain a more natural camera switching effect. The virtual reality video control method according to claim 1, wherein the video information comprises a camera number, a world matrix, a Boolean attribute, and a three-dimensional vector. The virtual reality video control method according to claim 2, wherein the camera number is automatically generated by a program, and when the camera switches, the camera number is switched from a small number to a large number. The virtual reality video control method according to claim 2, wherein the world matrix is used to record the position and direction of each camera. The virtual reality video control method according to claim 2, wherein the Boolean attribute is used to record whether the camera needs to stop switching. The virtual reality video control method according to claim 2, wherein the three-dimensional vector is used to record a Z-axis direction of a camera in display. The virtual reality video control method according to claim 1, wherein the The camera switching action includes smooth movement, rotation, and rotation about a particular object. The virtual reality video control method according to claim 7, wherein the smoothing movement is performed when the positions of the two cameras are different, but the Z-axis directions are the same. The virtual reality video control method according to claim 7, wherein the rotation is different between the front and rear cameras in the Z-axis direction, and when the positions are the same, the rotation is performed centering on itself. The virtual reality video control method according to claim 7, wherein the rotation of the specific object is different between the positions of the front and rear cameras and the Z-axis direction, and the control module performs the specific The object rotates in the center.