mirror of
https://github.com/zhigang1992/react-native-reanimated.git
synced 2026-06-15 02:19:30 +08:00
6b19cde018
This PR adds new "round" and "color" nodes. Color nodes can be used to map to color props in view (e.g. backgroundColor) Round is required for the color math to function properly (each color component needs to be an integer). Added demo app where you can pan view around that changes color depending on the position on HSV palette.
105 lines
3.2 KiB
Objective-C
105 lines
3.2 KiB
Objective-C
#include <tgmath.h>
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#import "REAOperatorNode.h"
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#import "REANodesManager.h"
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typedef id (^REAOperatorBlock)(NSArray<REANode *> *inputNodes);
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#define REA_REDUCE(OP) ^(NSArray<REANode *> *inputNodes) { \
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CGFloat acc = [[inputNodes[0] value] doubleValue]; \
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for (NSUInteger i = 1; i < inputNodes.count; i++) { \
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CGFloat a = acc, b = [[inputNodes[i] value] doubleValue]; \
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acc = OP; \
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} \
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return @(acc); \
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}
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#define REA_SINGLE(OP) ^(NSArray<REANode *> *inputNodes) { \
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CGFloat a = [[inputNodes[0] value] doubleValue]; \
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return @(OP); \
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}
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#define REA_INFIX(OP) ^(NSArray<REANode *> *inputNodes) { \
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CGFloat a = [[inputNodes[0] value] doubleValue]; \
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CGFloat b = [[inputNodes[1] value] doubleValue]; \
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return @(OP); \
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}
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@implementation REAOperatorNode {
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NSArray<NSNumber *> *_input;
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NSMutableArray<REANode *> *_inputNodes;
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REAOperatorBlock _op;
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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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static NSDictionary *OPS;
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static dispatch_once_t opsToken;
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dispatch_once(&opsToken, ^{
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OPS = @{
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// arithmetic
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@"add": REA_REDUCE(a + b),
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@"sub": REA_REDUCE(a - b),
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@"multiply": REA_REDUCE(a * b),
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@"divide": REA_REDUCE(a / b),
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@"pow": REA_REDUCE(pow(a, b)),
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@"modulo": REA_REDUCE(fmodf(fmodf(a, b) + b, b)),
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@"sqrt": REA_SINGLE(sqrt(a)),
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@"sin": REA_SINGLE(sin(a)),
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@"cos": REA_SINGLE(cos(a)),
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@"exp": REA_SINGLE(exp(a)),
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@"round": REA_SINGLE(round(a)),
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// logical
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@"and": ^(NSArray<REANode *> *inputNodes) {
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BOOL res = [[inputNodes[0] value] doubleValue];
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for (NSUInteger i = 1; i < inputNodes.count && res; i++) {
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res = res && [[inputNodes[i] value] doubleValue];
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}
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return res ? @(1.) : @(0.);
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},
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@"or": ^(NSArray<REANode *> *inputNodes) {
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BOOL res = [[inputNodes[0] value] doubleValue];
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for (NSUInteger i = 1; i < inputNodes.count && !res; i++) {
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res = res || [[inputNodes[i] value] doubleValue];
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}
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return res ? @(1.) : @(0.);
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},
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@"not": REA_SINGLE(!a),
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@"defined": ^(NSArray<REANode *> *inputNodes) {
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id val = [inputNodes[0] value];
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id res = @(val != nil && !isnan([val doubleValue]));
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return res;
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},
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// comparing
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@"lessThan": REA_INFIX(a < b),
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@"eq": REA_INFIX(a == b),
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@"greaterThan": REA_INFIX(a > b),
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@"lessOrEq": REA_INFIX(a <= b),
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@"greaterOrEq": REA_INFIX(a >= b),
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@"neq": REA_INFIX(a != b),
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};
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});
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if ((self = [super initWithID:nodeID config:config])) {
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_input = config[@"input"];
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_inputNodes = [NSMutableArray arrayWithCapacity:_input.count];
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_op = OPS[config[@"op"]];
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if (!_op) {
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RCTLogError(@"Operator '%@' not found", config[@"op"]);
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}
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}
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return self;
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}
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- (id)evaluate
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{
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for (NSUInteger i = 0; i < _input.count; i++) {
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_inputNodes[i] = [self.nodesManager findNodeByID:_input[i]];
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}
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return _op(_inputNodes);
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}
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@end
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