68 lines
2.3 KiB
Mathematica
68 lines
2.3 KiB
Mathematica
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#import "REACallFuncNode.h"
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#import "REAFunctionNode.h"
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#import "REAUtils.h"
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#import "REAParamNode.h"
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#import "REANodesManager.h"
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@implementation REACallFuncNode {
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NSNumber *_whatNodeID;
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NSArray<NSNumber *> *_args;
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NSArray<NSNumber *> *_params;
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NSString* _prevCallID;
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}
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- (instancetype)initWithID:(REANodeID)nodeID config:(NSDictionary<NSString *,id> *)config
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{
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if ((self = [super initWithID:nodeID config:config])) {
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_whatNodeID = config[@"what"];
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REA_LOG_ERROR_IF_NIL(_whatNodeID, @"Reanimated: First argument passed to callFunc node is either of wrong type or is missing.");
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_args = config[@"args"];
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_params = config[@"params"];
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_prevCallID = NULL;
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}
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return self;
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}
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- (void)beginContext
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{
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// To ensure that functions can be called multiple times in the same animation frame
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// (functions might have different parameters and might be called multiple times)
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// we inform the current update context about where we are called from by setting the
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// current call id - this will ensure that memoization is correct for function nodes.
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_prevCallID = self.updateContext.callID;
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self.updateContext.callID = [NSString stringWithFormat:@"%@/%@", self.updateContext.callID, [self.nodeID stringValue]];
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// A CallFuncNode has a reference to a function node which holds the node graph that should
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// be updated. A Function node has a list of ParamNodes which are basically nodes that can
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// reference other nodes. When we start a new function call we update the parameter nodes
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// with the current arguments:
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for (NSUInteger i = 0; i < _params.count; i++) {
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NSNumber *paramID = [_params objectAtIndex:i];
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REAParamNode *param = (REAParamNode *)[self.nodesManager findNodeByID:paramID];
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[param beginContext:_args[i] prevCallID:_prevCallID];
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}
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}
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- (void)endContext
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{
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for (NSUInteger i = 0; i < _params.count; i++) {
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NSNumber *paramID = [_params objectAtIndex:i];
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REAParamNode *param = (REAParamNode *)[self.nodesManager findNodeByID:paramID];
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[param endContext];
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}
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self.updateContext.callID = _prevCallID;
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}
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- (id)evaluate
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{
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[self beginContext];
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REAFunctionNode *what = (REAFunctionNode *)[self.nodesManager findNodeByID:_whatNodeID];
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NSNumber *newValue = [what value];
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[self endContext];
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return newValue;
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}
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@end
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