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101 lines
2.7 KiB
Objective-C
101 lines
2.7 KiB
Objective-C
//
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// LOTBezierData.m
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// Lottie
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//
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// Created by brandon_withrow on 7/10/17.
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// Copyright © 2017 Airbnb. All rights reserved.
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//
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#import "LOTBezierData.h"
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#import "CGGeometry+LOTAdditions.h"
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@implementation LOTBezierData {
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CGPoint *_vertices;
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CGPoint *_inTangents;
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CGPoint *_outTangents;
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}
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- (instancetype)initWithData:(NSDictionary *)bezierData
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{
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self = [super init];
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if (self) {
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[self initializeData:bezierData];
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}
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return self;
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}
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- (void)dealloc {
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free(_vertices);
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free(_inTangents);
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free(_outTangents);
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}
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- (CGPoint)vertexAtIndex:(NSInteger)index {
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NSAssert((index < _count &&
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index >= 0),
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@"Lottie: Index out of bounds");
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return _vertices[index];
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}
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- (CGPoint)inTangentAtIndex:(NSInteger)index {
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NSAssert((index < _count &&
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index >= 0),
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@"Lottie: Index out of bounds");
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return _inTangents[index];
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}
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- (CGPoint)outTangentAtIndex:(NSInteger)index {
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NSAssert((index < _count &&
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index >= 0),
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@"Lottie: Index out of bounds");
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return _outTangents[index];
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}
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- (void)initializeData:(NSDictionary *)bezierData {
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NSArray *pointsArray = bezierData[@"v"];
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NSArray *inTangents = bezierData[@"i"];
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NSArray *outTangents = bezierData[@"o"];
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if (pointsArray.count == 0) {
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NSLog(@"%s: Warning: shape has no vertices", __PRETTY_FUNCTION__);
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return ;
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}
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NSAssert((pointsArray.count == inTangents.count &&
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pointsArray.count == outTangents.count),
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@"Lottie: Incorrect number of points and tangents");
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_count = pointsArray.count;
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_vertices = (CGPoint *)malloc(sizeof(CGPoint) * pointsArray.count);
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_inTangents = (CGPoint *)malloc(sizeof(CGPoint) * pointsArray.count);
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_outTangents = (CGPoint *)malloc(sizeof(CGPoint) * pointsArray.count);
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if (bezierData[@"c"]) {
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_closed = [bezierData[@"c"] boolValue];
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}
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for (int i = 0; i < pointsArray.count; i ++) {
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CGPoint vertex = [self _vertexAtIndex:i inArray:pointsArray];
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CGPoint outTan = LOT_PointAddedToPoint(vertex, [self _vertexAtIndex:i inArray:outTangents]);
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CGPoint inTan = LOT_PointAddedToPoint(vertex, [self _vertexAtIndex:i inArray:inTangents]);
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// BW BUG Straight Lines - Test Later
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// Bake fix for lines here
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_vertices[i] = vertex;
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_inTangents[i] = inTan;
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_outTangents[i] = outTan;
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}
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}
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- (CGPoint)_vertexAtIndex:(NSInteger)idx inArray:(NSArray *)points {
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NSAssert((idx < points.count),
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@"Lottie: Vertex Point out of bounds");
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NSArray *pointArray = points[idx];
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NSAssert((pointArray.count >= 2 &&
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[pointArray.firstObject isKindOfClass:[NSNumber class]]),
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@"Lottie: Point Data Malformed");
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return CGPointMake([(NSNumber *)pointArray[0] floatValue], [(NSNumber *)pointArray[1] floatValue]);
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}
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@end
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