react-native-filament/lib/module/react/Model.js

A real-time physically based 3D rendering engine for React Native

function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
import React, { useCallback, useContext, useEffect, useMemo } from 'react';
import { useModel } from '../hooks/useModel';
import { getAssetFromModel } from '../utilities/getAssetFromModel';
import { useFilamentContext } from '../hooks/useFilamentContext';
import { Logger } from '../utilities/logger/Logger';
import { TouchHandlerContext } from './TouchHandlerContext';
import { useApplyTransformations } from '../hooks/internal/useApplyTransformations';
import { extractTransformationProps } from '../types/TransformProps';
import { ParentInstancesContext } from './ParentInstancesContext';
import { useConfigureAssetShadow } from '../hooks/useConfigureAssetShadow';

// Props we need for loading the model

/**
 * Loads a model from the given source.
 *
 *
 * If you are passing in a `.glb` model or similar from your app's bundle using `require(..)`, make sure to add `glb` as an asset extension to `metro.config.js`!
 * If you are passing in a `{ uri: ... }`, make sure the URL points directly to a `.glb` model. This can either be a web URL (`http://..`/`https://..`), a local file (`file://..`), or an native asset path (`path/to/asset.glb`)
 */
export function Model({
  source,
  ...restProps
}) {
  const [_transformProps, modelProps] = extractTransformationProps(restProps);
  const model = useModel(source, modelProps);
  return /*#__PURE__*/React.createElement(ModelRenderer, _extends({
    model: model
  }, restProps));
}
/**
 * Renders a model that was loaded with `useModel`.
 * Always prefer the `Model` component, except when you explicitly need to access the model instance imperatively.
 */
export function ModelRenderer({
  model,
  onPress,
  children,
  ...restProps
}) {
  const [transformProps] = extractTransformationProps(restProps);
  const asset = getAssetFromModel(model);
  const boundingBox = model.state === 'loaded' ? model.boundingBox : undefined;
  const rootEntity = model.state === 'loaded' ? model.rootEntity : undefined;
  useApplyTransformations({
    transformProps: transformProps,
    to: rootEntity,
    aabb: boundingBox
  });
  const renderableEntities = useMemo(() => {
    // The entities are only needed for touch events, so only load them if a touch handler is provided
    if (asset == null || onPress == null) return [];
    return asset.getRenderableEntities();
  }, [asset, onPress]);
  const {
    view,
    renderableManager
  } = useFilamentContext();
  const onTouchStart = useCallback(async event => {
    if (renderableEntities == null || onPress == null) return;
    const {
      locationX,
      locationY
    } = event.nativeEvent;
    const entity = await view.pickEntity(locationX, locationY);
    Logger.debug('Picked entity', entity, 'at', locationX, locationY);
    if (entity == null) {
      Logger.debug('No entity was picked');
      return;
    }

    // Check if the model was picked
    for (const renderableEntity of renderableEntities) {
      if ((entity === null || entity === void 0 ? void 0 : entity.id) === renderableEntity.id) {
        console.log('entity', entity.id, 'renderableEntity', renderableEntity.id);
        onPress(entity, renderableEntities);
        return;
      }
    }
    Logger.debug('No renderable entity of the model was picked:', renderableEntities);
  }, [onPress, renderableEntities, view]);
  const {
    addTouchHandler
  } = useContext(TouchHandlerContext);
  useEffect(() => {
    if (onPress == null) return;
    const id = Math.random().toString(36).substring(7);
    Logger.debug('Adding touch handler', id);
    const removeHandler = addTouchHandler(onTouchStart);
    return () => {
      Logger.debug('Removing touch handler', id);
      removeHandler();
    };
  }, [addTouchHandler, onPress, onTouchStart]);
  const instances = useMemo(() => {
    if (asset === undefined) {
      return null;
    }
    return asset.getAssetInstances();
  }, [asset]);
  useConfigureAssetShadow({
    renderableManager,
    asset,
    castShadow: restProps.castShadow,
    receiveShadow: restProps.receiveShadow
  });
  if (asset == null) {
    return null;
  }
  return /*#__PURE__*/React.createElement(ParentInstancesContext.Provider, {
    value: instances
  }, children);
}
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