Design and realization of stage lighting virtual effect

A mature and complete virtual design system platform is a very professional and practical design tool and right-hand assistant for lighting designers, performance directors, lighting control operators, lighting art teaching and lighting effect demonstrations. The real-time and convenient interactive function makes the system more real-time and operable. The system provides a real-time interactive operating environment to meet the needs of users.

1. System Architecture

 Logical Architecture

Whether it is a game or a virtual reality, in order to express its fidelity, the virtual scene is mostly complex, so the creation of the virtual scene is mostly generated by 3D modeling tools, and then the scene is rendered and output in real time. 3DMAX provides basic scene files for stage lighting design, parses them through the DOM (Document Object Model) interface, imports resources and organizes scenes. Final entry to OGRE

The system renders.

Lighting models are varied, and their effects need to be implemented separately in the scene. At the same time, users should also be able to perform various operations through the UI interface. The system requires high operational complexity, large amount of computation and strong scalability. It is necessary to design and establish an overall implementation architecture with high data processing and computing efficiency, strong scalability, and strong cohesion of functional modules (as shown in Figure 1). The system is divided into resource layer, interface layer, and rendering layer.

Resourc layer: Exported by the 3DMAX + Ofusion plug-in to generate resource files required by the scene organization, materials, entities, textures and other systems.

Interface layer: responsible for importing these resource files into the scene.

Rendering layer: Realize the rendering of stage scenes and lights, management of system resources, real-time response to user interaction, etc.

2.Research on key technologies for system implementation

Simulation of lighting effects

Lighting is a key factor for stage effects, and it is also the core technology of this design system. The rendering engine provides several commonly used lights, such as point lights, directional lights, and spot lights. But for realistic stage lighting effects simulation, these are not enough. For some special stage lighting effects, such as volume light, etc., it needs to be realized through programmable rendering pipeline technology (shader). There are two shaders, one is vertex-level, called vertex shader (OpenGL called ve spit program), which replaces the transformation and lighting part of the fixed rendering pipeline, and programmers can control vertex transformation, lighting, etc. by themselves. The unit that processes vertex shaders in hardware is called vertex shader processors (vertex processing unit). One is pixel-level, called pixel shader (called fragment program in OpenGL), which replaces the rasterization part in the fixed rendering pipeline, and the programmer can control the pixel color and texture sampling by himself. The unit that processes pixel shaders in hardware is called pixel shader processors (pixel processing unit)

Summarize:

Stage lighting design has become a major issue for lighting designers. They often have to face such high cost, high energy consumption and time-consuming problems. With the vigorous development of the information industry, the field of professional stage lighting has also entered a comprehensive digital era. The system uses the 0-GRE dyeing engine to establish a virtual stage, and presents the stage lighting design and adjustment in real time. Next, the system needs to further enrich the lighting model of the stage, which can simulate a variety of lights, such as: soft light, flash, follow light, etc. The user interface also needs to be further optimized to improve user friendliness.

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