Function createHookArguments

src/strands/strands_api.js:645–707

(strandsContext, parameters)

// Per-Hook functions
//////////////////////////////////////////////
function createHookArguments(strandsContext, parameters){
  const args = [];
  const dag = strandsContext.dag;
  for (const param of parameters) {
    if(isStructType(param.type)) {
      const structTypeInfo = structType(param);
      const { id, dimension } = build.structInstanceNode(strandsContext, structTypeInfo, `${HOOK_PARAM_PREFIX}${param.name}`, []);
      const structNode = createStrandsNode(id, dimension, strandsContext).withStructProperties(
        structTypeInfo.properties.map(prop => prop.name)
      );
      for (let i = 0; i < structTypeInfo.properties.length; i++) {
        const propertyType = structTypeInfo.properties[i];
        Object.defineProperty(structNode, propertyType.name, {
          get() {
            const propNode = getNodeDataFromID(dag, dag.dependsOn[structNode.id][i])
            const onRebind = (newFieldID) => {
              const oldDeps = dag.dependsOn[structNode.id];
              const newDeps = oldDeps.slice();
              newDeps[i] = newFieldID;
              const rebuilt = build.structInstanceNode(strandsContext, structTypeInfo, `${HOOK_PARAM_PREFIX}${param.name}`, newDeps);
              structNode.id = rebuilt.id;
            };
            // TODO: implement member access operations
            // const { id, components } = createMemberAccessNode(strandsContext, structNode, componentNodes[i], componentTypeInfo.dataType);
            // const memberAccessNode = new StrandsNode(id, components);
            // return memberAccessNode;
            return createStrandsNode(propNode.id, propNode.dimension, strandsContext, onRebind);
          },
          set(val) {
            const oldDependsOn = dag.dependsOn[structNode.id];
            const newDependsOn = [...oldDependsOn];
            let newValueID;
            if (val?.isStrandsNode) {
              newValueID = val.id;
            }
            else {
              let newVal = build.primitiveConstructorNode(strandsContext, propertyType.dataType, val);
              newValueID = newVal.id;
            }
            newDependsOn[i] = newValueID;
            const newStructInfo = build.structInstanceNode(strandsContext, structTypeInfo, `${HOOK_PARAM_PREFIX}${param.name}`, newDependsOn);
            structNode.id = newStructInfo.id;
          }
        })
      }
      args.push(structNode);
    }
    else /*if(isNativeType(paramType.typeName))*/ {
      // Skip sampler parameters - they don't need strands nodes
      if (param.type.typeName === 'sampler') {
        continue;
      }
      if (!param.type.dataType) {
        throw new Error(`Missing dataType for parameter ${param.name} of type ${param.type.typeName}`);
      }
      const typeInfo = param.type.dataType;
      const { id, dimension } = build.variableNode(strandsContext, typeInfo, `${HOOK_PARAM_PREFIX}${param.name}`);
      const arg = createStrandsNode(id, dimension, strandsContext);