@dcl-sdk/utils
Version:
A collection of helpers to make it easier to build a Decentraland scene using the SDK 7.
75 lines • 10.7 kB
JavaScript
import { engine, Transform, AudioSource } from '@dcl/sdk/ecs';
import { Vector3 } from '@dcl/sdk/math';
import { InterpolationType } from './math';
export function getEntitiesWithParent(parent) {
const entitiesWithParent = [];
for (const [entity, transform] of engine.getEntitiesWith(Transform)) {
if (transform.parent === parent) {
entitiesWithParent.push(entity);
}
}
return entitiesWithParent;
}
export function getEntityParent(child) {
const transform = Transform.getOrNull(child);
if (transform) {
return transform.parent;
}
else {
return engine.RootEntity;
}
}
export function getPlayerPosition() {
return Transform.getOrNull(engine.PlayerEntity)?.position || Vector3.create();
}
export function playSound(file, loop = false, position) {
const entity = engine.addEntity();
AudioSource.create(entity, {
audioClipUrl: file,
loop,
playing: true
});
Transform.create(entity, {
position: position ? position : getPlayerPosition()
});
return entity;
}
export function getEasingFunctionFromInterpolation(type) {
switch (type) {
case InterpolationType.LINEAR:
return 0;
case InterpolationType.EASEINQUAD:
return 1;
case InterpolationType.EASEOUTQUAD:
return 2;
case InterpolationType.EASEQUAD:
return 3;
case InterpolationType.EASEINSINE:
return 4;
case InterpolationType.EASEOUTSINE:
return 5;
case InterpolationType.EASESINE:
return 6;
case InterpolationType.EASEINEXPO:
return 7;
case InterpolationType.EASEOUTEXPO:
return 8;
case InterpolationType.EASEEXPO:
return 9;
case InterpolationType.EASEINELASTIC:
return 10;
case InterpolationType.EASEOUTELASTIC:
return 11;
case InterpolationType.EASEELASTIC:
return 12;
case InterpolationType.EASEINBOUNCE:
return 13;
case InterpolationType.EASEOUTEBOUNCE:
return 14;
case InterpolationType.EASEBOUNCE:
return 15;
default:
return 0;
}
}
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If the entity has no children, it returns an empty array.\n * @public\n */\nexport function getEntitiesWithParent(\n\tparent: Entity\n): Entity[] {\n\tconst entitiesWithParent: Entity[] = [];\n\n\tfor (const [entity, transform] of engine.getEntitiesWith(Transform)) {\n\t\tif (transform.parent === parent) {\n\t\t\tentitiesWithParent.push(entity);\n\t\t}\n\t}\n\n\treturn entitiesWithParent;\n}\n\n\n/**\n * Returns an entity that is the parent of the provided entity.\n *\n * @param child - Child of the entity you want to fetch.\n * @returns The parent entity. If no parent is found it defaults to the root entity of the scene.\n * @public\n */\n\nexport function getEntityParent(\n\tchild: Entity\n): Entity {\n\tconst transform = Transform.getOrNull(child);\n\tif (transform) {\n\t\treturn transform.parent as Entity;\n\t} else {\n\t\treturn engine.RootEntity as Entity;\n\t}\n}\n\n\n/**\n * Returns the position of the player's avatar.\n *\n * @returns A Vector3 with the current position of the player's avatar, relative to the scene's origin. If no data can be retrieved, it returns (0,0,0).\n * @public\n */\nexport function getPlayerPosition(): Vector3 {\n\treturn Transform.getOrNull(engine.PlayerEntity)?.position || Vector3.create()\n}\n\n\n\n/**\n * Plays a sound from an audio file, at a given location in the scene.\n *\n * @param file - Path to an audio file stored in the scene's folder, as a string.\n * @param loop - Boolean to specify if the sound should be played once or looped. False by default.\n * @param position - Vector3 with the position relative to the scene's origin. If not provided, the sound plays at the camera's location.\n * @returns An array of [entity, transform] for each entity that is a child of the provided entity. If the entity has no children, it returns null.\n * @public\n */\nexport function playSound(\n\tfile: string,\n\tloop: boolean = false,\n\tposition?: Vector3\n) {\n\tconst entity = engine.addEntity()\n\tAudioSource.create(entity, {\n\t\taudioClipUrl: file,\n\t\tloop,\n\t\tplaying: true\n\t})\n\n\tTransform.create(entity, {\n\t\tposition: position ? position : getPlayerPosition()\n\t})\n\n\treturn entity\n}\n\n/**\n * Maps an EasingFunction to the provided InterpolationType\n *\n * @param type - an InterpolationType enum type\n * @returns An EasingFunction enum type\n * @public\n */\nexport function getEasingFunctionFromInterpolation(type: InterpolationType): EasingFunction {\n\tswitch (type) {\n\t\tcase InterpolationType.LINEAR:\n\t\t\treturn EasingFunction.EF_LINEAR\n\t\tcase InterpolationType.EASEINQUAD:\n\t\t\treturn EasingFunction.EF_EASEINQUAD\n\t\tcase InterpolationType.EASEOUTQUAD:\n\t\t\treturn EasingFunction.EF_EASEOUTQUAD\n\t\tcase InterpolationType.EASEQUAD:\n\t\t\treturn EasingFunction.EF_EASEQUAD\n\t\tcase InterpolationType.EASEINSINE:\n\t\t\treturn EasingFunction.EF_EASEINSINE\n\t\tcase InterpolationType.EASEOUTSINE:\n\t\t\treturn EasingFunction.EF_EASEOUTSINE\n\t\tcase InterpolationType.EASESINE:\n\t\t\treturn EasingFunction.EF_EASESINE\n\t\tcase InterpolationType.EASEINEXPO:\n\t\t\treturn EasingFunction.EF_EASEINEXPO\n\t\tcase InterpolationType.EASEOUTEXPO:\n\t\t\treturn EasingFunction.EF_EASEOUTEXPO\n\t\tcase InterpolationType.EASEEXPO:\n\t\t\treturn EasingFunction.EF_EASEEXPO\n\t\tcase InterpolationType.EASEINELASTIC:\n\t\t\treturn EasingFunction.EF_EASEINELASTIC\n\t\tcase InterpolationType.EASEOUTELASTIC:\n\t\t\treturn EasingFunction.EF_EASEOUTELASTIC\n\t\tcase InterpolationType.EASEELASTIC:\n\t\t\treturn EasingFunction.EF_EASEELASTIC\n\t\tcase InterpolationType.EASEINBOUNCE:\n\t\t\treturn EasingFunction.EF_EASEINBOUNCE\n\t\tcase InterpolationType.EASEOUTEBOUNCE:\n\t\t\treturn EasingFunction.EF_EASEOUTBOUNCE\n\t\tcase InterpolationType.EASEBOUNCE:\n\t\t\treturn EasingFunction.EF_EASEBOUNCE\n\t\tdefault:\n\t\t\treturn EasingFunction.EF_LINEAR\n\t}\n}\n"]}