@openhps/core/dist/esm/three/renderers/webgl/WebGLObjects.js

Open Hybrid Positioning System - Core component

function WebGLObjects(gl, geometries, attributes, info) {
  let updateMap = new WeakMap();
  function update(object) {
    const frame = info.render.frame;
    const geometry = object.geometry;
    const buffergeometry = geometries.get(object, geometry);

    // Update once per frame

    if (updateMap.get(buffergeometry) !== frame) {
      geometries.update(buffergeometry);
      updateMap.set(buffergeometry, frame);
    }
    if (object.isInstancedMesh) {
      if (object.hasEventListener('dispose', onInstancedMeshDispose) === false) {
        object.addEventListener('dispose', onInstancedMeshDispose);
      }
      if (updateMap.get(object) !== frame) {
        attributes.update(object.instanceMatrix, gl.ARRAY_BUFFER);
        if (object.instanceColor !== null) {
          attributes.update(object.instanceColor, gl.ARRAY_BUFFER);
        }
        updateMap.set(object, frame);
      }
    }
    if (object.isSkinnedMesh) {
      const skeleton = object.skeleton;
      if (updateMap.get(skeleton) !== frame) {
        skeleton.update();
        updateMap.set(skeleton, frame);
      }
    }
    return buffergeometry;
  }
  function dispose() {
    updateMap = new WeakMap();
  }
  function onInstancedMeshDispose(event) {
    const instancedMesh = event.target;
    instancedMesh.removeEventListener('dispose', onInstancedMeshDispose);
    attributes.remove(instancedMesh.instanceMatrix);
    if (instancedMesh.instanceColor !== null) attributes.remove(instancedMesh.instanceColor);
  }
  return {
    update: update,
    dispose: dispose
  };
}
export { WebGLObjects };