lingo3d/lib/systems/areaLightIntensitySystem.js

Lingo3D is a React/Vue 3d game development framework that ships with a complete visual editor

import { mapRange } from "@lincode/math";
import { getDistanceFromCamera } from "../memo/getDistanceFromCamera";
import { lightDistancePtr } from "../pointers/lightDistancePtr";
import createInternalSystem from "./utils/createInternalSystem";
export const areaLightIntensitySystem = createInternalSystem("areaLightIntensitySystem", {
    update: (self) => {
        if (!self.$light)
            return;
        const intensityFactor = mapRange(getDistanceFromCamera(self), 0, lightDistancePtr[0], 1, 0, true);
        self.$light.intensity = self.intensity * intensityFactor;
        // self.light.visible = !!intensityFactor
    }
});
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