/*

     File: ASCSlideScenegraph.m

 Abstract: Explains the structure of the scene graph with a diagram.

  Version: 1.1

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#import "ASCPresentationViewController.h"

#import "ASCSlideTextManager.h"

#import "ASCSlideSceneGraph.h"

#import "Utils.h"

@implementation ASCSlideSceneGraph

- (NSUInteger)numberOfSteps {

    return 4;

}

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

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

    self.textManager.title = @"Scene Graph";

    self.textManager.subtitle = @"Scene";

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

    [self.textManager addBullet:@"Starting point" atLevel:0];

    // Setup the diagram

    SCNNode *diagramNode = [[self class] sharedScenegraphDiagramNode];

    [self.groundNode addChildNode:diagramNode];

}

- (void)presentStepIndex:(NSUInteger)index withPresentionViewController:(ASCPresentationViewController *)presentationViewController {

    SCNNode *diagramNode = [[self class] sharedScenegraphDiagramNode];

    [[self class] scenegraphDiagramGoToStep:index];

    switch (index) {

        case 0:

            diagramNode.opacity = 0.0;

            diagramNode.position = SCNVector3Make(0.0, 5.0, 0.0);

            diagramNode.rotation = SCNVector4Make(1, 0, 0, -M_PI_2);

            break;

        case 1:

        {

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0];

            {

                [self.textManager flipOutTextOfType:ASCTextTypeBullet];

                [self.textManager flipOutTextOfType:ASCTextTypeSubtitle];

                // Change the slide's subtitle and add some text

                self.textManager.subtitle = @"Node";

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

                [self.textManager addBullet:@"A location in 3D space" atLevel:0];

                [self.textManager addBullet:@"Position / Rotation / Scale" atLevel:1];

                [self.textManager flipInTextOfType:ASCTextTypeSubtitle];

                [self.textManager flipInTextOfType:ASCTextTypeBullet];

            }

            [SCNTransaction commit];

            break;

        }

        case 2:

            [self.textManager addBullet:@"Hierarchy of nodes" atLevel:0];

            [self.textManager addBullet:@"Relative to the parent node" atLevel:1];

            break;

        case 3:

        {

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0];

            {

                [self.textManager flipOutTextOfType:ASCTextTypeBullet];

                [self.textManager flipOutTextOfType:ASCTextTypeSubtitle];

                // Change the slide's subtitle and add some text

                self.textManager.subtitle = @"Node attributes";

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

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

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

                [self.textManager addBullet:@"Can be shared" atLevel:0];

                [self.textManager flipInTextOfType:ASCTextTypeSubtitle];

                [self.textManager flipInTextOfType:ASCTextTypeBullet];

            }

            [SCNTransaction commit];

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:1.0];

            {

                // move the diagram up otherwise it would intersect the floor

                diagramNode.position = SCNVector3Make(0.0, diagramNode.position.y + 1.0, 0.0);

            }

            [SCNTransaction commit];

            break;

        }

    }

}

- (void)didOrderInWithPresentionViewController:(ASCPresentationViewController *)presentationViewController {

    SCNNode *diagramNode = [[self class] sharedScenegraphDiagramNode];

    [SCNTransaction begin];

    [SCNTransaction setAnimationDuration:1.0];

    {

        diagramNode.opacity = 1.0;

        diagramNode.rotation = SCNVector4Make(1, 0, 0, 0);

        [[self class] showNodesNamed:@[@"scene"]];

    }

    [SCNTransaction commit];

}

+ (SCNNode *)sharedScenegraphDiagramNode {

    static SCNNode *diagramNode = nil;

    if (diagramNode == nil) {

        diagramNode = [SCNNode node];

        diagramNode.opacity = 0.0;

        // "Scene"

        NSColor* blue = [NSColor colorWithDeviceRed:49.0/255 green:80.0/255 blue:201/255.0 alpha:1];

        SCNNode *box = [SCNNode asc_boxNodeWithTitle:@"Scene" frame:NSMakeRect(-53.5, -25, 107, 50) color:blue cornerRadius:10 centered:YES];

        box.name = @"scene";

        box.scale = SCNVector3Make(0.03, 0.03, 0.03);

        box.position = SCNVector3Make(5.4, 4.8, 0);

        [diagramNode addChildNode:box];

        // Arrow from "Scene" to "Root Node"

        SCNNode *arrowNode = [SCNNode node];

        arrowNode.name = @"sceneArrow";

        arrowNode.geometry = [SCNShape shapeWithPath:[NSBezierPath asc_arrowBezierPathWithBaseSize:NSMakeSize(3,0.2) tipSize:NSMakeSize(0.5, 0.7) hollow:0.2 twoSides:NO] extrusionDepth:0];

        arrowNode.scale = SCNVector3Make(20, 20, 1);

        arrowNode.position = SCNVector3Make(-5, 0, 8);

        arrowNode.rotation = SCNVector4Make(0, 0, 1, -M_PI_2);

        arrowNode.geometry.firstMaterial.diffuse.contents = blue;

        [box addChildNode:arrowNode];

        // "Root Node"

        NSColor *green = [NSColor colorWithDeviceRed:154.0/255 green:197.0/255 blue:58.0/255 alpha:1];

        box = [SCNNode asc_boxNodeWithTitle:@"Root Node" frame:NSMakeRect(-40, -36, 80, 72) color:green cornerRadius:10.0 centered:YES];

        box.name = @"rootNode";

        box.scale = SCNVector3Make(0.03, 0.03, 0.03);

        box.position = SCNVector3Make(5.405, 1.8, 0);

        [diagramNode addChildNode:box];

        // Arrows from "Root Node" to child nodes

        arrowNode = [arrowNode clone];

        arrowNode.name = @"nodeArrow1";

        arrowNode.geometry = [SCNShape shapeWithPath:[NSBezierPath asc_arrowBezierPathWithBaseSize:NSMakeSize(5.8,0.15) tipSize:NSMakeSize(0.5, 0.7) hollow:0.2 twoSides:YES] extrusionDepth:0];

        arrowNode.position = SCNVector3Make(0, -30, 8);

        arrowNode.rotation = SCNVector4Make(0, 0, 1, -(M_PI * 0.85));

        arrowNode.geometry.firstMaterial.diffuse.contents = green;

        [box addChildNode:arrowNode];

        arrowNode = [arrowNode clone];

        arrowNode.name = @"nodeArrow2";

        arrowNode.position = SCNVector3Make(0, -43, 8);

        arrowNode.rotation = SCNVector4Make(0, 0, 1, -(M_PI * (1-0.85)));

        [box addChildNode:arrowNode];

        arrowNode = [arrowNode clone];

        arrowNode.name = @"nodeArrow3";

        arrowNode.geometry = [SCNShape shapeWithPath:[NSBezierPath asc_arrowBezierPathWithBaseSize:NSMakeSize(2.6,0.15) tipSize:NSMakeSize(0.5, 0.7) hollow:0.2 twoSides:YES] extrusionDepth:0];

        arrowNode.position = SCNVector3Make(-4, -38, 8);

        arrowNode.rotation = SCNVector4Make(0, 0, 1, -(M_PI * 0.5));

        arrowNode.geometry.firstMaterial.diffuse.contents = green;

        [box addChildNode:arrowNode];

        // Multiple "Child Node"

        box = [SCNNode asc_boxNodeWithTitle:@"Child Node" frame:NSMakeRect(-40, -36, 80, 72) color:green cornerRadius:10.0 centered:YES];

        box.name = @"child1";

        box.scale = SCNVector3Make(0.03, 0.03, 0.03);

        box.position = SCNVector3Make(2.405, -2, 0);

        [diagramNode addChildNode:box];

        box = [box clone];

        box.name = @"child2";

        box.position = SCNVector3Make(5.405, -2, 0);

        [diagramNode addChildNode:box];

        box = [box clone];

        box.name = @"child3";

        box.position = SCNVector3Make(8.405, -2, 0);

        [diagramNode addChildNode:box];

        // "Light"

        NSColor *purple = [NSColor colorWithDeviceRed:190.0/255 green:56.0/255 blue:243.0/255 alpha:1];

        box = [SCNNode asc_boxNodeWithTitle:@"Light" frame:NSMakeRect(-40, -20, 80, 40) color:purple cornerRadius:10 centered:YES];

        box.name = @"light";

        box.scale = SCNVector3Make(0.03, 0.03, 0.03);

        box.position = SCNVector3Make(2.405, -4.8, 0);

        [diagramNode addChildNode:box];

        // Arrow to "Light"

        arrowNode = [SCNNode node];

        arrowNode.name = @"lightArrow";

        arrowNode.geometry = [SCNShape shapeWithPath:[NSBezierPath asc_arrowBezierPathWithBaseSize:NSMakeSize(2.0,0.15) tipSize:NSMakeSize(0.5, 0.7) hollow:0.2 twoSides:NO] extrusionDepth:0];

        arrowNode.position = SCNVector3Make(-5, 60, 8);

        arrowNode.scale = SCNVector3Make(20, 20, 1);

        arrowNode.rotation = SCNVector4Make(0, 0, 1, -M_PI_2);

        arrowNode.geometry.firstMaterial.diffuse.contents = purple;

        [box addChildNode:arrowNode];

        // "Camera"

        box = [SCNNode asc_boxNodeWithTitle:@"Camera" frame:NSMakeRect(-45, -20, 90, 40) color:purple cornerRadius:10 centered:YES];

        box.name = @"camera";

        box.scale = SCNVector3Make(0.03, 0.03, 0.03);

        box.position = SCNVector3Make(5.25, -4.8, 0);

        [diagramNode addChildNode:box];

        // Arrow to "Camera"

        arrowNode = [arrowNode clone];

        arrowNode.name = @"cameraArrow";

        arrowNode.position = SCNVector3Make(0, 60, 8);

        [box addChildNode:arrowNode];

        // "Geometry"

        box = [SCNNode asc_boxNodeWithTitle:@"Geometry" frame:NSMakeRect(-55, -20, 110, 40) color:purple cornerRadius:10 centered:YES];

        box.name = @"geometry";

        box.scale = SCNVector3Make(0.03, 0.03, 0.03);

        box.position = SCNVector3Make(8.6, -4.8, 0);

        [diagramNode addChildNode:box];

        // Arrows to "Geometry"

        arrowNode = [arrowNode clone];

        arrowNode.name = @"geometryArrow";

        arrowNode.position = SCNVector3Make(-10, 60, 8);

        [box addChildNode:arrowNode];

        arrowNode = [arrowNode clone];

        arrowNode.name = @"geometryArrow2";

        arrowNode.geometry = [SCNShape shapeWithPath:[NSBezierPath asc_arrowBezierPathWithBaseSize:NSMakeSize(5.0,0.15) tipSize:NSMakeSize(0.5, 0.7) hollow:0.2 twoSides:NO] extrusionDepth:0];

        arrowNode.geometry.firstMaterial.diffuse.contents = purple;

        arrowNode.position = SCNVector3Make(-105, 53, 8);

        arrowNode.rotation = SCNVector4Make(0, 0, 1, -M_PI / 8);

        [box addChildNode:arrowNode];

        // Multiple "Material"

        NSColor *redColor = [NSColor colorWithDeviceRed:168.0/255 green:21.0/255 blue:0.0/255 alpha:1];

        SCNNode *materialsBox = [SCNNode asc_boxNodeWithTitle:nil frame:NSMakeRect(-151, -25, 302, 50) color:[NSColor lightGrayColor] cornerRadius:2 centered:YES];

        materialsBox.scale = SCNVector3Make(0.03, 0.03, 0.03);

        materialsBox.name = @"materials";

        materialsBox.position = SCNVector3Make(8.7, -7.1, -0.2);

        [diagramNode addChildNode:materialsBox];

        box = [SCNNode asc_boxNodeWithTitle:@"Material" frame:NSMakeRect(-45, -20, 90, 40) color:redColor cornerRadius:0 centered:YES];

        box.position = SCNVector3Make(-100, 0, 0.2);

        [materialsBox addChildNode:box];

        box = [box clone];

        box.position = SCNVector3Make(100, 0, 0.2);

        [materialsBox addChildNode:box];

        box = [box clone];

        box.position = SCNVector3Make(0, 0, 0.2);

        [materialsBox addChildNode:box];

        // Arrow from "Geometry" to the materials

        arrowNode = [SCNNode node];

        arrowNode.geometry = [SCNShape shapeWithPath:[NSBezierPath asc_arrowBezierPathWithBaseSize:NSMakeSize(2.0,0.15) tipSize:NSMakeSize(0.5, 0.7) hollow:0.2 twoSides:NO] extrusionDepth:0];

        arrowNode.position = SCNVector3Make(-6, 65, 8);

        arrowNode.scale = SCNVector3Make(20, 20, 1);

        arrowNode.rotation = SCNVector4Make(0, 0, 1, -M_PI_2);

        arrowNode.geometry.firstMaterial.diffuse.contents = redColor;

        [box addChildNode:arrowNode];

        [materialsBox.parentNode replaceChildNode:materialsBox with:[materialsBox flattenedClone]];

    }

    return diagramNode;

}

+ (void)highlightNodesNamed:(NSArray *)names inNodeTree:(SCNNode *)node {

    for (SCNNode *child in node.childNodes) {

        if ([names containsObject:child.name]) {

            child.opacity = 1;

            [self highlightNodesNamed:names inNodeTree:child];

        }

        else {

            if (child.opacity == 1.0)

                child.opacity = 0.3;

        }

    }

}

+ (void)showNodesNamed:(NSArray *)names {

    SCNNode *diagramNode = [self sharedScenegraphDiagramNode];

    [SCNTransaction begin];

    [SCNTransaction setAnimationDuration:1.0];

    {

        for (NSString *nodeName in names) {

            SCNNode *node = [diagramNode childNodeWithName:nodeName recursively:YES];

            node.opacity = 1.0;

            if (node.rotation.z == 0.0)

                node.rotation = SCNVector4Make(0, 1, 0, 0);

        }

    }

    [SCNTransaction commit];

}

+ (void)scenegraphDiagramGoToStep:(NSUInteger)step {

    SCNNode *diagramNode = [[self class] sharedScenegraphDiagramNode];

    switch (step) {

        case 0:

            // Restore the initial state (hidden and rotated)

            [diagramNode childNodesPassingTest:^BOOL(SCNNode *child, BOOL *stop) {

                child.opacity = 0.0;

                if (child.rotation.z == 0) // don't touch nodes that already have a rotation set

                    child.rotation = SCNVector4Make(0, 1, 0, M_PI_2);

                return NO;

            }];

            break;

        case 1:

            [self showNodesNamed:@[@"sceneArrow", @"rootNode"]];

            break;

        case 2:

            [self showNodesNamed:@[@"child1", @"child2", @"child3", @"nodeArrow1", @"nodeArrow2", @"nodeArrow3"]];

            break;

        case 3:

            [self showNodesNamed:@[@"light", @"camera", @"geometry", @"lightArrow", @"cameraArrow", @"geometryArrow", @"geometryArrow2"]];

            break;

        case 4:

            [self showNodesNamed:@[@"scene", @"sceneArrow", @"rootNode", @"light", @"camera", @"cameraArrow", @"child1", @"child2", @"child3", @"nodeArrow1", @"nodeArrow2", @"nodeArrow3", @"geometry", @"lightArrow", @"geometryArrow", @"geometryArrow2"]];

            [self highlightNodesNamed:@[@"scene", @"sceneArrow", @"rootNode", @"light", @"camera", @"cameraArrow", @"child1", @"child2", @"child3", @"nodeArrow1", @"nodeArrow2", @"nodeArrow3", @"geometry", @"lightArrow", @"geometryArrow", @"geometryArrow2"] inNodeTree:diagramNode];

            break;

        case 5:

            [self showNodesNamed:@[@"scene", @"sceneArrow", @"rootNode", @"light", @"camera", @"cameraArrow", @"child1", @"child2", @"child3", @"nodeArrow1", @"nodeArrow2", @"nodeArrow3", @"geometry", @"lightArrow", @"geometryArrow", @"geometryArrow2", @"materials"]];

            [self highlightNodesNamed:@[@"scene", @"sceneArrow", @"rootNode", @"child2", @"child3", @"nodeArrow2", @"nodeArrow3", @"geometry", @"geometryArrow", @"geometryArrow2", @"materials"] inNodeTree:diagramNode];

            break;

        case 6:

            [self highlightNodesNamed:@[@"child3", @"geometryArrow", @"geometry"] inNodeTree:diagramNode];

            break;

        case 7:

            [self showNodesNamed:@[@"scene", @"sceneArrow", @"rootNode", @"light", @"camera", @"cameraArrow", @"child1", @"child2", @"child3", @"nodeArrow1", @"nodeArrow2", @"nodeArrow3", @"geometry", @"lightArrow", @"geometryArrow", @"geometryArrow2", @"materials"]];

            break;

    }

}

@end