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A simple motion blur extension for Sparrow
//
// SHMotionBlurSprite.h
// Sparrow
//
// Created by Shilo White on 1/14/11.
// Copyright 2011 Shilocity Productions. All rights reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the Simplified BSD License.
//
#define SH_MOTION_BLUR_INFINITE -1
#define SH_MOTION_BLUR_NONE 0
#import "SPSprite.h"
@class SPEnterFrameEvent;
@class SPRenderTexture;
@class SPImage;
@interface SHMotionBlurSprite : SPSprite {
SPSprite *mContainer;
SPRenderTexture *mRenderTexture[2];
SPImage *mImage[2];
float mBlurDuration;
float mBlurAlpha;
}
@property (nonatomic, assign) float blurDuration;
@property (nonatomic, assign) float blurAlpha;
@property (nonatomic, readonly) SPRenderTexture *renderTexture;
- (id)initWithBlurDuration:(float)blurDuration;
- (id)initWithBlurAlpha:(float)blurAlpha;
- (id)initWithWidth:(float)width height:(float)height;
- (id)initWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha;
- (id)initWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha width:(float)width height:(float)height;
+ (SHMotionBlurSprite *)motionBlurSprite;
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurDuration:(float)blurDuration;
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurAlpha:(float)blurAlpha;
+ (SHMotionBlurSprite *)motionBlurSpriteWithWidth:(float)width height:(float)height;
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha;
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha width:(float)width height:(float)height;
@end
//
// SHMotionBlurSprite.m
// Sparrow
//
// Created by Shilo White on 1/14/11.
// Copyright 2011 Shilocity Productions. All rights reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the Simplified BSD License.
//
#import "SHMotionBlurSprite.h"
#import "SPEnterFrameEvent.h"
#import "SPRenderTexture.h"
#import "SPImage.h"
#import "SPDisplayObject_Internal.h"
@implementation SHMotionBlurSprite
@synthesize blurDuration = mBlurDuration;
@synthesize blurAlpha = mBlurAlpha;
- (id)init
{
return [self initWithBlurDuration:1.0f blurAlpha:0.5f width:320 height:480];
}
- (id)initWithBlurDuration:(float)blurDuration
{
return [self initWithBlurDuration:blurDuration blurAlpha:0.5f width:320 height:480];
}
- (id)initWithBlurAlpha:(float)blurAlpha
{
return [self initWithBlurDuration:1.0f blurAlpha:blurAlpha width:320 height:480];
}
- (id)initWithWidth:(float)width height:(float)height
{
return [self initWithBlurDuration:1.0f blurAlpha:0.5f width:width height:height];
}
- (id)initWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha
{
return [self initWithBlurDuration:blurDuration blurAlpha:blurAlpha width:320 height:480];
}
- (id)initWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha width:(float)width height:(float)height
{
if (self = [super init])
{
mBlurDuration = blurDuration;
mBlurAlpha = blurAlpha;
mRenderTexture[0] = [[SPRenderTexture alloc] initWithWidth:width height:height];
mRenderTexture[1] = [[SPRenderTexture alloc] initWithWidth:width height:height];
mImage[0] = [SPImage imageWithTexture:mRenderTexture[0]];
mImage[1] = [SPImage imageWithTexture:mRenderTexture[1]];
mImage[0].visible = NO;
mImage[1].visible = NO;
[super addChild:mImage[0] atIndex:0];
[super addChild:mImage[1] atIndex:1];
mContainer = [SPSprite sprite];
[super addChild:mContainer atIndex:2];
if (mBlurDuration != SH_MOTION_BLUR_NONE) [self addEventListener:@selector(blurObjects:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
}
return self;
}
+ (SHMotionBlurSprite *)motionBlurSprite
{
return [[[SHMotionBlurSprite alloc] initWithBlurDuration:1.0f blurAlpha:0.5f width:320 height:480] autorelease];
}
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurDuration:(float)blurDuration
{
return [[[SHMotionBlurSprite alloc] initWithBlurDuration:blurDuration blurAlpha:0.5f width:320 height:480] autorelease];
}
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurAlpha:(float)blurAlpha
{
return [[[SHMotionBlurSprite alloc] initWithBlurDuration:1.0f blurAlpha:blurAlpha width:320 height:480] autorelease];
}
+ (SHMotionBlurSprite *)motionBlurSpriteWithWidth:(float)width height:(float)height
{
return [[[SHMotionBlurSprite alloc] initWithBlurDuration:1.0f blurAlpha:0.5f width:width height:height] autorelease];
}
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha
{
return [[[SHMotionBlurSprite alloc] initWithBlurDuration:blurDuration blurAlpha:blurAlpha width:320 height:480] autorelease];
}
+ (SHMotionBlurSprite *)motionBlurSpriteWithBlurDuration:(float)blurDuration blurAlpha:(float)blurAlpha width:(float)width height:(float)height
{
return [[[SHMotionBlurSprite alloc] initWithBlurDuration:blurDuration blurAlpha:blurAlpha width:width height:height] autorelease];
}
- (void)blurObjects:(SPEnterFrameEvent *)event
{
if (mImage[0].visible) {
[mRenderTexture[0] drawObject:mContainer];
mImage[0].alpha = 1.0f - (event.passedTime/mBlurDuration);
[mRenderTexture[1] clearWithColor:0x0 alpha:1.0f];
[mRenderTexture[1] drawObject:mImage[0]];
mImage[1].alpha = mBlurAlpha;
mImage[1].visible = YES;
mImage[0].visible = NO;
} else {
[mRenderTexture[1] drawObject:mContainer];
mImage[1].alpha = 1.0f - (event.passedTime/mBlurDuration);
[mRenderTexture[0] clearWithColor:0x0 alpha:1.0f];
[mRenderTexture[0] drawObject:mImage[1]];
mImage[0].alpha = mBlurAlpha;
mImage[0].visible = YES;
mImage[1].visible = NO;
}
}
- (void)setBlurDuration:(float)blurDuration
{
if (blurDuration != mBlurDuration)
{
if (mBlurDuration == SH_MOTION_BLUR_NONE)
{
[self addEventListener:@selector(blurObjects:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
}
else if (blurDuration == SH_MOTION_BLUR_NONE)
{
[self removeEventListener:@selector(blurObjects:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
}
mBlurDuration = blurDuration;
}
}
- (SPRenderTexture *)renderTexture {
return mRenderTexture[0];
}
- (void)addChild:(SPDisplayObject *)child
{
[mContainer addChild:child];
}
- (void)addChild:(SPDisplayObject *)child atIndex:(int)index
{
[mContainer addChild:child atIndex:index];
}
- (BOOL)containsChild:(SPDisplayObject *)child
{
return [mContainer containsChild:child];
}
- (SPDisplayObject *)childAtIndex:(int)index
{
return [mContainer childAtIndex:index];
}
- (SPDisplayObject *)childByName:(NSString *)name
{
return [mContainer childByName:name];
}
- (int)childIndex:(SPDisplayObject *)child
{
return [mContainer childIndex:child];
}
- (void)removeChild:(SPDisplayObject *)child
{
[mContainer removeChild:child];
}
- (void)removeChildAtIndex:(int)index
{
[mContainer removeChildAtIndex:index];
}
- (void)swapChild:(SPDisplayObject*)child1 withChild:(SPDisplayObject*)child2
{
[mContainer swapChild:child1 withChild:child2];
}
- (void)swapChildAtIndex:(int)index1 withChildAtIndex:(int)index2
{
[mContainer swapChildAtIndex:index1 withChildAtIndex:index2];
}
- (void)removeAllChildren
{
[mContainer removeAllChildren];
}
- (int)numChildren
{
return [mContainer numChildren];
}
- (SPRectangle*)boundsInSpace:(SPDisplayObject*)targetCoordinateSpace
{
return [mContainer boundsInSpace:targetCoordinateSpace];
}
- (SPDisplayObject*)hitTestPoint:(SPPoint*)localPoint forTouch:(BOOL)isTouch
{
return [mContainer hitTestPoint:localPoint forTouch:isTouch];
}
- (void)dispatchEventOnChildren:(SPEvent *)event
{
[(SPDisplayObject *)mContainer dispatchEventOnChildren:event];
}
#pragma mark NSFastEnumeration
- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len
{
return [mContainer countByEnumeratingWithState:state objects:stackbuf count:len];
}
- (void)dealloc
{
if (mBlurDuration != SH_MOTION_BLUR_NONE) [self removeEventListener:@selector(blurObjects:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
[super removeChildAtIndex:[super childIndex:mContainer]];
[super removeChildAtIndex:[super childIndex:mImage[0]]];
[super removeChildAtIndex:[super childIndex:mImage[1]]];
[mRenderTexture[0] release];
[mRenderTexture[1] release];
[super dealloc];
}
@end
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