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ThirdPersonCamera.tsx
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ThirdPersonCamera.tsx
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import React, { FunctionComponent, useState } from 'react';
import { TilePosition } from '../../../types/TilePosition';
import { CameraEventListener } from '../CameraEventListener/CameraEventListener';
import { ManualCamera } from '../ManualCamera/ManualCamera';
import { ThirdPersonCameraContext } from './ThirdPersonCameraContext/ThirdPersonCameraContext';
import { useCameraRecenter } from './ThirdPersonCamera.useCameraRecenter';
import { useHandlers } from './ThirdPersonCamera.useHandlers';
import { useInitialCameraPosition } from './ThirdPersonCamera.useInitialCameraPosition';
import { useMotions } from './ThirdPersonCamera.useMotions';
import { ThirdPersonCameraProps } from './ThirdPersonCamera.types';
/**
* Use this component to operate with a third person camera in the tilemap.
*
* Here you can forget about control the camera position and zoom because this component will do it for you enabling drag and zoom controls by default.
*
* This component will provide a context to all its children. There you can use the `useThirdPersonCamera` hook to get this context and use it to control the camera using the `addCameraMotion` and `addZoomMotion` functions.
*
* @param props component props
*/
export const ThirdPersonCamera: FunctionComponent<ThirdPersonCameraProps> = (props) => {
const initialZoom = props.initialZoom != undefined ? Math.abs(props.initialZoom) : 0;
const [cameraPosition, setCameraPosition] = useState<TilePosition | undefined>(undefined);
const [zoom, setZoom] = useState<number>(initialZoom);
const [isCameraDragging, setIsDragging] = useState<boolean>(false);
const {
addZoomMotion,
addCameraMotion,
currentZoomMotion,
currentCameraMotion,
zoomMotionQueue,
cameraMotionQueue,
} = useMotions(isCameraDragging, cameraPosition, zoom, setCameraPosition, setZoom);
const isCameraInMotion = !!currentCameraMotion;
const isZoomInMotion = !!currentZoomMotion;
const handlers = useHandlers({
draggable: props.draggable,
zoomeable: props.zoomeable,
dragSensitivity: props.dragSensitivity,
zoomIncrement: props.zoomIncrement,
isCameraDragging,
setIsDragging,
isCameraInMotion,
isZoomInMotion,
cameraPosition,
zoom,
setCameraPosition,
setZoom,
});
useInitialCameraPosition(props.initialCameraPosition, cameraPosition, setCameraPosition);
useCameraRecenter(addCameraMotion, props.recenterCameraOnResize, props.recenterCameraOnZoom);
return (
<ThirdPersonCameraContext.Provider
value={{
cameraPosition,
zoom,
addZoomMotion,
addCameraMotion,
currentCameraMotion,
currentZoomMotion,
zoomMotionQueue,
cameraMotionQueue,
}}
>
<CameraEventListener handlers={handlers} />
<ManualCamera position={cameraPosition} zoom={zoom} clickable={false}>
{props.children}
</ManualCamera>
</ThirdPersonCameraContext.Provider>
);
};