Introduction of weather system for dark area breakthrough

There is a unique weather system in the breakout of the dark zone, and many friends are eager to know what the weather system in the game is like. Today, I brought you an introduction to the weather system that broke through in the dark zone. Let's look at friends who don't know much about the weather system, hoping to help everyone.

Introduction of weather system for dark area breakthrough

Real-time calculation, simulating the dark area of illumination angle according to the position of celestial bodies, can always give the old skin a sense of freshness. Whenever I come here, I will have a different visual experience. This mainly comes from the simulated weather system in the dark area.

The sun shines at a flat angle and reflects on the ground to form a real spot.

In order to truly restore the changes in the sky and atmosphere caused by the passage of time, the dark area broke through and realized the technical model of calculating the orbit of celestial bodies based on geographical location, and simulated and calculated the points where different celestial bodies, including the sun, stayed at different times. The angle of scattering natural light is deduced from the position of celestial bodies in real time, and then a more natural sunlight irradiation effect is obtained.

We can experience natural simulation more intuitively under time-lapse photography and restore the real sky with optical principles.

The relationship between the sun and the sky is like cutting water with a sharp knife-it is difficult to separate. After talking about sunshine, Lao Pi will naturally show you the real sky in our dark area.

In Yun Lan, the sky in dark areas is very white.

The dark sky simulates the scattering and absorption of sunlight when it collides with atmospheric particles based on the illumination angle, which mainly includes two optical phenomena: Rayleigh scattering and Michaelis scattering.

When simulating Rayleigh scattering, air molecules with too small radius are irradiated by sunlight, while blue light can directly penetrate small particles because of its short wavelength, which makes the whole sky look covered by blue light and forms a clear and natural blue sky background in the dark area.

Dark sky simulates Rayleigh scattering, natural blue sky.

At the same time, in the reduction of white clouds, the dark area also simulates the Michaelis scattering when sunlight irradiates particles with larger radius. The scattering intensity of this optical phenomenon is inversely proportional to the second power of light wavelength. When sunlight passes through the thin clouds in the dark area, the scattering intensities of various colors are not much different, and they are still mixed light, thus dyeing the clouds into real and vivid white.

Dark clouds simulate mie scattering, realistic white clouds

Volume cloud algorithm creates intelligent white clouds in dark areas.

In addition to true color reproduction, clouds in dark areas also have real-time dynamic changes.

From dawn to dusk, the clouds are vivid and agile.

The agility of dark cloud benefits from the body cloud technology realized by technical leaders. The cloud distribution parameters that vary with different weather conditions are used to simulate the influence of clouds and calculate the cloud density at various positions in the sky.

At the same time, combined with the depth-optimized Raymarching algorithm, the lighting effects of the body cloud is calculated in real time, which adds more real details to the sky and enhances the visual effect brought by weather changes.

illuminating system

In addition to blue sky and white clouds, a unique lighting mixing scheme has been developed in dark areas to cope with the dynamic changes of time and weather.

Under the mixed lighting scheme, the light and shadow details of the dilapidated factory building are full.

Different from the traditional mobile game scheme based on static illumination map and reflective probe, the dark area illumination mixing scheme uses real-time method to calculate the brightness of the scene directly illuminated by sunlight. At the same time, the indirect illumination produced by diffuse reflection after multiple bounces in the scene is considered comprehensively.

This comprehensive deduction model can effectively solve the diffuse global illumination of dynamic sunlight and skylight in real time, and combine it with indirect photography of local static illumination to simulate more realistic illumination changes.

Light sources are separated to create a more detailed light experience.

See the real chapter for details, and the hard-core details of the lighting system are also reflected in the separation of natural light sources and artificial light sources.

The artificial light source is obviously separated from the natural light source.

This distinction between natural light sources and artificial light sources is mainly due to the use of photometric lighting based on physics in the lighting system for dark areas, which can not only restore the true contrast between light and shade of different light sources, but also take into account the lighting change requirements in gameplay. For example, Lao Pi often searches that dark little room. At the moment of going out, because the light changed too fast, his eyes were blinded by Liu's ambush and it was difficult to reach the top.