/*

 Copyright (C) 2014-2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Presents the Xcode SceneKit editor.

 */

#import "AAPLPresentationViewController.h"

#import "AAPLSlideTextManager.h"

#import "AAPLSlide.h"

#import "Utils.h"

@interface AAPLSlideTechniques : AAPLSlide

{

    SCNNode *_plistGroup;

    SCNNode *_pass3;

    SCNNode *_pass2;

    SCNNode *_pass1;

}

@end

typedef enum {

    StepIntro,

    Step1Pass,

    Step3Passes,

    Step3PassesConnected,

    StepFiles,

    StepFilesPlist,

    StepCode,

    StepSample,

    StepCount

} TechniqueSteps;

@implementation AAPLSlideTechniques

- (void)setupSlideWithPresentationViewController:(AAPLPresentationViewController *)presentationViewController {

    // Set the slide's title and add some text

    self.textManager.title = @"Multi-Pass Effects";

    self.textManager.subtitle = @"SCNTechnique";

    [self.textManager addBullet:@"Multi-pass effects" atLevel:0];

    [self.textManager addBullet:@"Post processing" atLevel:0];

    [self.textManager addBullet:@"Chain passes" atLevel:0];

    [self.textManager addBullet:@"Set and animate shader uniforms in Objective-C" atLevel:0];

}

- (NSUInteger)numberOfSteps{

    return StepCount;

}

- (void)presentStepIndex:(NSUInteger)index withPresentationViewController:(AAPLPresentationViewController *)presentationViewController {

    switch (index) {

        case StepIntro:

            break;

        case StepCode:

            [self.textManager flipOutTextOfType:AAPLTextTypeBullet];

            [_plistGroup removeFromParentNode];

            [self.textManager addEmptyLine];

            [self.textManager addCode:@"// Load a technique\nSCNTechnique *technique = [SCNTechnique #techniqueWithDictionary#:aDictionary];\n\n"

             "// Chain techniques\ntechnique = [SCNTechnique #techniqueBySequencingTechniques#:@[t1, t2 ...];\n\n"

             "// Set a technique\naSCNView.#technique# = technique;"];

            [self.textManager flipInTextOfType:AAPLTextTypeBullet];

            [self.textManager flipInTextOfType:AAPLTextTypeCode];

            break;

        case StepFiles:

        {

            [_pass2 removeFromParentNode];

            [self.textManager flipOutTextOfType:AAPLTextTypeBullet];

            [self.textManager addBullet:@"Load from Plist" atLevel:0];

            [self.textManager flipInTextOfType:AAPLTextTypeCode];

            _plistGroup = [SCNNode node];

            [self.contentNode addChildNode:_plistGroup];

            //add plist icon

            SCNNode *node = [SCNNode asc_planeNodeWithImageNamed:@"plist.png" size:8 isLit:YES];

            node.position = SCNVector3Make(0, 3.7, 10);

            [_plistGroup addChildNode:node];

            //add plist icon

            node = [SCNNode asc_planeNodeWithImageNamed:@"vsh.png" size:3 isLit:YES];

            for(int i = 0; i<5; i++){

                node = [node clone];

                node.position = SCNVector3Make(6, 1.4, 10 - i);

                [_plistGroup addChildNode:node];

            }

            node = [SCNNode asc_planeNodeWithImageNamed:@"fsh.png" size:3 isLit:YES];

            for(int i = 0; i<5; i++){

                node = [node clone];

                node.position = SCNVector3Make(9, 1.4, 10 - i);

                [_plistGroup addChildNode:node];

            }

        }

            break;

        case StepFilesPlist:

        {

            //add plist icon

            SCNNode *node = [SCNNode asc_planeNodeWithImageNamed:@"technique.png" size:9 isLit:YES];

            node.position = SCNVector3Make(0, 3.5, 10.1);

            node.opacity = 0.0;

            [_plistGroup addChildNode:node];

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0.75];

            node.position = SCNVector3Make(0, 3.5, 11);

            node.opacity = 1.0;

            [SCNTransaction commit];

        }

            break;

        case Step1Pass:

        {

            [self.textManager flipOutTextOfType:AAPLTextTypeBullet];

            SCNNode *node = [SCNNode asc_planeNodeWithImageNamed:@"pass1.png" size:15 isLit:YES];

            node.position = SCNVector3Make(0, 3.5, 10.1);

            node.opacity = 0.0;

            [self.contentNode addChildNode:node];

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0.75];

            node.position = SCNVector3Make(0, 3.5, 11);

            node.opacity = 1.0;

            [SCNTransaction commit];

            _pass1 = node;

        }

            break;

        case Step3Passes:

        {

            [_pass1 removeFromParentNode];

            _pass2 = [SCNNode node];

            _pass2.opacity = 0.0;

            _pass2.position = SCNVector3Make(0, 3.5, 6);

            SCNNode *node = [SCNNode asc_planeNodeWithImageNamed:@"pass2.png" size:8 isLit:YES];

            node.position = SCNVector3Make(-8, 0, 0);

            [_pass2 addChildNode:node];

            node = [SCNNode asc_planeNodeWithImageNamed:@"pass3.png" size:8 isLit:YES];

            node.position = SCNVector3Make(0, 0, 0);

            [_pass2 addChildNode:node];

            node = [SCNNode asc_planeNodeWithImageNamed:@"pass4.png" size:8 isLit:YES];

            node.position = SCNVector3Make(8, 0, 0);

            [_pass2 addChildNode:node];

            [self.contentNode addChildNode:_pass2];

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0.75];

            _pass2.position = SCNVector3Make(0, 3.5, 9);

            _pass2.opacity = 1.0;

            [SCNTransaction commit];

        }

            break;

        case Step3PassesConnected:

        {

            [self.textManager addEmptyLine];

            [self.textManager addBullet:@"Connect pass inputs/outputs" atLevel:0];

            SCNNode *node = [SCNNode asc_planeNodeWithImageNamed:@"link.png" size:8.75 isLit:YES];

            node.position = SCNVector3Make(0.01, -2, 0);

            node.opacity = 0;

            [_pass2 addChildNode:node];

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0.75];

            SCNNode *n = _pass2.childNodes[0];

            n.position = SCNVector3Make(-7.5, -0.015, 0);

            n = _pass2.childNodes[2];

            n.position = SCNVector3Make(7.5, 0.02, 0);

            node.opacity = 1;

            [SCNTransaction commit];

        }

            break;

        case StepSample:

        {

            [self.textManager flipOutTextOfType:AAPLTextTypeCode];

            [self.textManager flipOutTextOfType:AAPLTextTypeSubtitle];

            [self.textManager setSubtitle:@"Example—simple depth of field"];

            [self.textManager flipInTextOfType:AAPLTextTypeCode];

            _pass3 = [SCNNode node];

            SCNNode *node = [SCNNode asc_planeNodeWithImageNamed:@"pass5.png" size:15 isLit:YES];

            node.position = SCNVector3Make(-3, 5, 10.1);

            node.opacity = 0.0;

            [_pass3 addChildNode:node];

            SCNNode *t0 = [SCNNode asc_planeNodeWithImageNamed:@"technique0.png" size:4 isLit:NO];

            t0.position = SCNVector3Make(-8.5, 1.5, 10.1);

            t0.opacity = 0.0;

            [_pass3 addChildNode:t0];

            SCNNode *t1 = [SCNNode asc_planeNodeWithImageNamed:@"technique1.png" size:4 isLit:NO];

            t1.position = SCNVector3Make(-3.6, 1.5, 10.1);

            t1.opacity = 0.0;

            [_pass3 addChildNode:t1];

            SCNNode *t2 = [SCNNode asc_planeNodeWithImageNamed:@"technique2.png" size:4 isLit:NO];

            t2.position = SCNVector3Make(1.4, 1.5, 10.1);

            t2.opacity = 0.0;

            [_pass3 addChildNode:t2];

            SCNNode *t3 = [SCNNode asc_planeNodeWithImageNamed:@"technique3.png" size:8 isLit:NO];

            t3.position = SCNVector3Make(8, 5, 10.1);

            t3.opacity = 0.0;

            [_pass3 addChildNode:t3];

            [[self contentNode] addChildNode:_pass3];

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0.75];

            node.opacity = 1.0;

            t0.opacity = 1.0;

            t1.opacity = 1.0;

            t2.opacity = 1.0;

            t3.opacity = 1.0;

            [SCNTransaction commit];

        }

            break;

    }

}

@end