lingo3d/lib/systems/lookToSystem.js

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

import fpsAlpha from "../display/utils/fpsAlpha";
import createInternalSystem from "./utils/createInternalSystem";
export const lookToSystem = createInternalSystem("lookToSystem", {
    data: {},
    update: (self, data) => {
        const { quaternion, quaternionNew, a1 } = data;
        quaternion.slerp(quaternionNew, fpsAlpha(a1 ?? 0.05));
        const x = Math.abs(quaternion.x - quaternionNew.x);
        const y = Math.abs(quaternion.y - quaternionNew.y);
        const z = Math.abs(quaternion.z - quaternionNew.z);
        const w = Math.abs(quaternion.w - quaternionNew.w);
        if (x + y + z + w < 0.001) {
            lookToSystem.delete(self);
            self.onLookToEnd?.();
            quaternion.copy(quaternionNew);
        }
    }
});
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