/*

 Copyright (C) 2014 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

   Metal Particle System for Metal Shader Showpiece. Initializes the particle system data that is sent to the GPU.

 */

#import <Foundation/Foundation.h>

#import <Metal/Metal.h>

#import "AAPLSharedTypes.h"

@interface AAPLParticleSystem : NSObject

@property (nonatomic) id <MTLBuffer> initial_direction_buffer;

@property (nonatomic) id <MTLBuffer> birth_offsets_buffer;

@property (nonatomic, readonly) unsigned int num_particles;

@property (nonatomic, readonly) float lifespan;

- (instancetype)initWithDevice:(id <MTLDevice>)device;

@end