Method and device for drawing virtual reality scene and virtual reality device

Abstract

The invention discloses a method and device for drawing a virtual reality scene and a virtual reality device. The method comprises the steps that a vertical synchronous signal of specific frequency is set to control a drawing thread and a rendering thread; time of finishing rendering a frame of the virtual reality scene by the rendering thread is estimated; wake-up time is set, the rendering thread is woken up to start rendering the frame of virtual reality scene at the wake-up time and completes rendering the frame of virtual reality scene just before the vertical synchronous signal arrives; the rendering thread enters a state of waiting for a wake when rendering is completed; when the vertical synchronous signal arrives, the drawing thread sends the frame of virtual reality scene rendered by the rendering thread to a screen, and drawing of the frame of virtual reality scene is finished. According to the scheme, the interval between the time of finishing rendering the frame of virtual reality scene by the rendering thread and time of sending the scene to the screen by the drawing thread is reduced, the invalid waiting time of the rendering thread is reduced, the delay is reduced, and the user experience is enhanced.

Description

technical field [0001] The invention relates to the technical field of virtual reality, in particular to a method and device for rendering a virtual reality scene and a virtual reality device. Background technique [0002] At present, the drawing process of mainstream virtual reality scenes adopts Timewarp asynchronous refresh method. The drawing mode is as follows: figure 1 As shown, there are generally two threads: a rendering thread (render) and a drawing thread (timewarp). The result of the rendering thread is obtained by the drawing thread and sent to the screen. The drawing thread controls the two threads according to the vertical synchronization signal (VSYNC). run. [0003] After the rendering thread thread completes a drawing, it does not directly perform the next drawing, but waits for the drawing thread to wake up. Every time the drawing thread receives the vertical synchronization signal, it draws and wakes up the rendering thread to render the next frame of im...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this mode is that the rendering thread must be in a waiting state after each drawing, waiting for the drawing thread to wake up. If the rendering task of the rendering thread is relatively light, the drawing will be completed in a short time, so the rendered image needs to be Waiting for a longer time will be displayed on the screen. The longer the time interval between rendering a frame of image and displaying it on the screen, the greater the delay experienced by the user, which will bring dizziness and other adverse experiences.

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