@babylonjs/core
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JavaScript
import { FlowGraphEventBlock } from "../../flowGraphEventBlock.js";
import { PointerEventTypes } from "../../../Events/pointerEvents.js";
import { RegisterClass } from "../../../Misc/typeStore.js";
import { _IsDescendantOf } from "../../utils.js";
import { RichTypeAny, RichTypeNumber, RichTypeVector3 } from "../../flowGraphRichTypes.js";
/**
* A block that activates when a mesh is picked.
*/
export class FlowGraphMeshPickEventBlock extends FlowGraphEventBlock {
constructor(
/**
* the configuration of the block
*/
config) {
super(config);
this.config = config;
/**
* the type of the event this block reacts to
*/
this.type = "MeshPick" /* FlowGraphEventType.MeshPick */;
this.asset = this.registerDataInput("asset", RichTypeAny, config?.targetMesh);
this.pickedPoint = this.registerDataOutput("pickedPoint", RichTypeVector3);
this.pickOrigin = this.registerDataOutput("pickOrigin", RichTypeVector3);
this.pointerId = this.registerDataOutput("pointerId", RichTypeNumber);
this.pickedMesh = this.registerDataOutput("pickedMesh", RichTypeAny);
this.pointerType = this.registerDataInput("pointerType", RichTypeAny, PointerEventTypes.POINTERPICK);
}
_getReferencedMesh(context) {
return this.asset.getValue(context);
}
_executeEvent(context, pickedInfo) {
// get the pointer type
const pointerType = this.pointerType.getValue(context);
if (pointerType !== pickedInfo.type) {
// returning true here to continue the propagation of the pointer event to the rest of the blocks
return true;
}
// check if the mesh is the picked mesh or a descendant
const mesh = this._getReferencedMesh(context);
if (mesh && pickedInfo.pickInfo?.pickedMesh && (pickedInfo.pickInfo?.pickedMesh === mesh || _IsDescendantOf(pickedInfo.pickInfo?.pickedMesh, mesh))) {
this.pointerId.setValue(pickedInfo.event.pointerId, context);
this.pickOrigin.setValue(pickedInfo.pickInfo.ray?.origin, context);
this.pickedPoint.setValue(pickedInfo.pickInfo.pickedPoint, context);
this.pickedMesh.setValue(pickedInfo.pickInfo.pickedMesh, context);
this._execute(context);
// stop the propagation if the configuration says so
return !this.config?.stopPropagation;
}
else {
// reset the outputs
this.pointerId.resetToDefaultValue(context);
this.pickOrigin.resetToDefaultValue(context);
this.pickedPoint.resetToDefaultValue(context);
this.pickedMesh.resetToDefaultValue(context);
}
return true;
}
/**
* @internal
*/
_preparePendingTasks(_context) {
// no-op
}
/**
* @internal
*/
_cancelPendingTasks(_context) {
// no-op
}
/**
* @returns class name of the block.
*/
getClassName() {
return "FlowGraphMeshPickEventBlock" /* FlowGraphBlockNames.MeshPickEvent */;
}
}
RegisterClass("FlowGraphMeshPickEventBlock" /* FlowGraphBlockNames.MeshPickEvent */, FlowGraphMeshPickEventBlock);
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