126 lines
4.7 KiB
Plaintext
126 lines
4.7 KiB
Plaintext
#import "MGLMapCamera.h"
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#include <mbgl/util/projection.hpp>
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@implementation MGLMapCamera
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+ (BOOL)supportsSecureCoding
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{
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return YES;
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}
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+ (instancetype)camera
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{
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return [[self alloc] init];
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}
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+ (instancetype)cameraLookingAtCenterCoordinate:(CLLocationCoordinate2D)centerCoordinate
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fromEyeCoordinate:(CLLocationCoordinate2D)eyeCoordinate
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eyeAltitude:(CLLocationDistance)eyeAltitude
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{
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mbgl::LatLng centerLatLng = mbgl::LatLng(centerCoordinate.latitude, centerCoordinate.longitude);
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mbgl::LatLng eyeLatLng = mbgl::LatLng(eyeCoordinate.latitude, eyeCoordinate.longitude);
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mbgl::ProjectedMeters centerMeters = mbgl::Projection::projectedMetersForLatLng(centerLatLng);
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mbgl::ProjectedMeters eyeMeters = mbgl::Projection::projectedMetersForLatLng(eyeLatLng);
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CLLocationDirection heading = std::atan((centerMeters.northing - eyeMeters.northing) /
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(centerMeters.easting - eyeMeters.easting));
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double groundDistance = std::hypot(centerMeters.northing - eyeMeters.northing,
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centerMeters.easting - eyeMeters.easting);
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CGFloat pitch = std::atan(eyeAltitude / groundDistance);
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return [[self alloc] initWithCenterCoordinate:centerCoordinate
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altitude:eyeAltitude
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pitch:pitch
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heading:heading];
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}
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+ (instancetype)cameraLookingAtCenterCoordinate:(CLLocationCoordinate2D)centerCoordinate
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fromDistance:(CLLocationDistance)distance
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pitch:(CGFloat)pitch
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heading:(CLLocationDirection)heading
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{
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return [[self alloc] initWithCenterCoordinate:centerCoordinate
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altitude:distance
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pitch:pitch
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heading:heading];
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}
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- (instancetype)initWithCenterCoordinate:(CLLocationCoordinate2D)centerCoordinate
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altitude:(CLLocationDistance)altitude
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pitch:(CGFloat)pitch
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heading:(CLLocationDirection)heading
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{
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if (self = [super init])
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{
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_centerCoordinate = centerCoordinate;
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_altitude = altitude;
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_pitch = pitch;
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_heading = heading;
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}
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return self;
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}
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- (nullable instancetype)initWithCoder:(NSCoder *)coder
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{
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if (self = [super init])
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{
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_centerCoordinate = CLLocationCoordinate2DMake([coder decodeDoubleForKey:@"centerLatitude"],
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[coder decodeDoubleForKey:@"centerLongitude"]);
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_altitude = [coder decodeDoubleForKey:@"altitude"];
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_pitch = [coder decodeDoubleForKey:@"pitch"];
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_heading = [coder decodeDoubleForKey:@"heading"];
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}
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return self;
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}
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- (void)encodeWithCoder:(NSCoder *)coder
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{
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[coder encodeDouble:_centerCoordinate.latitude forKey:@"centerLatitude"];
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[coder encodeDouble:_centerCoordinate.longitude forKey:@"centerLongitude"];
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[coder encodeDouble:_altitude forKey:@"altitude"];
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[coder encodeDouble:_pitch forKey:@"pitch"];
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[coder encodeDouble:_heading forKey:@"heading"];
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}
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- (id)copyWithZone:(nullable NSZone *)zone
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{
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return [[[self class] allocWithZone:zone] initWithCenterCoordinate:_centerCoordinate
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altitude:_altitude
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pitch:_pitch
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heading:_heading];
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}
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- (NSString *)description
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{
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return [NSString stringWithFormat:@"<%@: %p; centerCoordinate = %f, %f; altitude = %.0fm; heading = %.0f°; pitch = %.0f°>",
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NSStringFromClass([self class]), (void *)self, _centerCoordinate.latitude, _centerCoordinate.longitude, _altitude, _heading, _pitch];
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}
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- (BOOL)isEqual:(id)other
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{
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if ( ! [other isKindOfClass:[self class]])
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{
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return NO;
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}
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if (other == self)
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{
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return YES;
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}
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MGLMapCamera *otherCamera = other;
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return (_centerCoordinate.latitude == otherCamera.centerCoordinate.latitude
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&& _centerCoordinate.longitude == otherCamera.centerCoordinate.longitude
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&& _altitude == otherCamera.altitude
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&& _pitch == otherCamera.pitch && _heading == otherCamera.heading);
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}
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- (NSUInteger)hash
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{
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return (@(_centerCoordinate.latitude).hash + @(_centerCoordinate.longitude).hash
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+ @(_altitude).hash + @(_pitch).hash + @(_heading).hash);
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}
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@end
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