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The principle is explained in detail:
The lighting simulation simulates the influence of the canopy on the lighting according to different time and weather conditions, so as to determine the shadow range of the canopy within a given period of time. The following is a detailed explanation of the principle:
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Sun position calculation: First, calculate the sun's position in the sky, including the sun's altitude and azimuth, based on the date, time and location.
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Lighting Simulation: Using the sun's position information, simulate the light from the sun to the ground and create shadows on the tree canopy. This can be achieved with a ray tracing algorithm, taking into account the shape and height of the canopy.
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Shadow range calculation: According to the results of light simulation, determine the shadow range cast by the canopy on the ground, that is, the area of influence of the canopy on the light within a given period of time.
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Weather Conditions Consideration: Considers weather conditions such as cloud thickness and transparency to determine actual lighting conditions. This can be obtained through weather data or sensors.
2. Flowchart:
The following is a simplified flowchart of lighting simulation: