/*

     File: ASCAppDelegate.m 

 Abstract: This is the main controller for the application and handles the setup of the view and the creation of a scene. It declares properties for Cocoa Bindings extensively used in MainMenu.xib to display rich information about a node's geometry and its materials. An instance of this class is created in MainMenu.xib and uses an outlet for the view (connected in the xib). 

  Version: 1.0 

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION 

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 */

#import "ASCAppDelegate.h"

#import "ASCValueTransformers.h"

@implementation ASCAppDelegate

#pragma mark - Material presets

- (SCNMaterial *)chromeMaterial {

    SCNMaterial *material = [SCNMaterial material];

    material.diffuse.contents = [NSColor blackColor];

    // We build a cubemap using an array of 6 images

    NSArray *mapArray = @[ [NSImage imageNamed:@"right.jpg"],

                           [NSImage imageNamed:@"left.jpg"],

                           [NSImage imageNamed:@"top.jpg"],

                           [NSImage imageNamed:@"bottom.jpg"],

                           [NSImage imageNamed:@"back.jpg"],

                           [NSImage imageNamed:@"front.jpg"] ];

    material.reflective.contents = mapArray;

    material.normal.contents     = [NSImage imageNamed:@"chrome-normal"];

    material.specular.contents   = [NSColor whiteColor];

    material.shininess = 100.0;

    material.locksAmbientWithDiffuse = YES;

    return material;

}

- (SCNMaterial *)earthMaterial {

    SCNMaterial *material = [SCNMaterial material];

    material.diffuse.contents    = [NSImage imageNamed:@"earth-diffuse"];

    material.normal.contents     = [NSImage imageNamed:@"earth-normal"];      

    material.reflective.contents = [NSImage imageNamed:@"earth-reflective"];

    material.specular.contents   = [NSImage imageNamed:@"earth-specular"];

    material.locksAmbientWithDiffuse = YES;

    return material;

}

- (SCNMaterial *)screeMaterial {

    SCNMaterial *material = [SCNMaterial material];

    material.diffuse.contents  = [NSImage imageNamed:@"scree-diffuse"];

    material.multiply.contents = [NSImage imageNamed:@"scree-multiply"];

    material.normal.contents   = [NSImage imageNamed:@"scree-normal"];

    material.specular.contents = [NSColor colorWithDeviceWhite:0.3 alpha:1];

    material.shininess = 0.2;

    material.locksAmbientWithDiffuse = YES;

    return material;

}

- (SCNMaterial *)stoneMaterial {

    SCNMaterial *material = [SCNMaterial material];

    material.diffuse.contents  = [NSImage imageNamed:@"stone-diffuse"];

    material.normal.contents   = [NSImage imageNamed:@"stone-normal"];

    material.specular.contents = [NSColor colorWithDeviceWhite:0.3 alpha:1];

    material.locksAmbientWithDiffuse = YES;

    return material;

}

- (SCNMaterial *)woodMaterial {

    SCNMaterial *material = [SCNMaterial material];

    material.diffuse.contents  = [NSImage imageNamed:@"wood-diffuse"];

    material.normal.contents   = [NSImage imageNamed:@"wood-bump"];

    material.specular.contents = [NSImage imageNamed:@"wood-specular"];

    material.locksAmbientWithDiffuse = YES;

    return material;

}

#pragma mark - Material

- (void)selectMaterialPresetAtIndex:(NSUInteger)index {

    static NSArray *materials = nil;

    if (materials == nil) {

        materials = @[ [self chromeMaterial],

                       [SCNMaterial material],

                       [self earthMaterial],

                       [self screeMaterial],

                       [self stoneMaterial],

                       [self woodMaterial] ];

    }

    SCNMaterial *material = [materials[index] copy];

    // Configure all the material properties

    void(^configureMaterialProperty)(SCNMaterialProperty *materialProperty) = ^(SCNMaterialProperty *materialProperty) {

        // Setup a trilinear filtering

        //   this is to reduce the aliasing when minimizing / maximizing the images

        materialProperty.minificationFilter  = SCNLinearFiltering;

        materialProperty.magnificationFilter = SCNLinearFiltering;

        materialProperty.mipFilter           = SCNLinearFiltering;

        // Repeat the texture if necessary

        materialProperty.wrapS = SCNRepeat;

        materialProperty.wrapT = SCNRepeat;

    };

    configureMaterialProperty(material.ambient);

    configureMaterialProperty(material.diffuse);

    configureMaterialProperty(material.specular);

    configureMaterialProperty(material.emission);

    configureMaterialProperty(material.transparent);

    configureMaterialProperty(material.reflective);

    configureMaterialProperty(material.multiply);

    configureMaterialProperty(material.normal);

    // Make the material visible from the two sides - front and back

    material.doubleSided = YES;

    // Set the material and update the geometry accordingly

    self.material = material;

    _modelNode.geometry.materials = @[_material];

}

- (IBAction)selectMaterialPreset:(id)sender {

    [self selectMaterialPresetAtIndex:[sender indexOfSelectedItem]];

}

#pragma mark - Model geometry

- (void)setModelIndex:(NSUInteger)index {

    static NSArray *models = nil;

    if (models == nil) {

        models = @[ [SCNSphere sphereWithRadius:8.0],

                    [SCNCylinder cylinderWithRadius:8.0 height:8.0],

                    [SCNBox boxWithWidth:10 height:10 length:10 chamferRadius:0],

                    [SCNPlane planeWithWidth:15 height:15],

                    [SCNTorus torusWithRingRadius:8 pipeRadius:3] ];

    }

    _modelIndex = index;

    // Set the right geometry with the right material

    _modelNode.geometry = models[_modelIndex];

    _modelNode.geometry.materials = @[_material];

}

#pragma mark -

- (void)awakeFromNib {

    // Create a scene

    SCNScene *scene = [SCNScene scene];

    // Add a camera to the scene

    SCNNode *cameraNode = [SCNNode node];

    cameraNode.camera = [SCNCamera camera]; 

    cameraNode.position = SCNVector3Make(0, 0, 30);

    [scene.rootNode addChildNode:cameraNode];

    // Add a diffuse light to the scene

    self.diffuseLightNode = [SCNNode node];

    _diffuseLightNode.light = [SCNLight light];

    _diffuseLightNode.light.type = SCNLightTypeOmni;

    _diffuseLightNode.position = SCNVector3Make(-30, 30, 50);

    [scene.rootNode addChildNode:_diffuseLightNode];

    // Add an ambient light to the scene

    self.ambientLightNode = [SCNNode node];

    _ambientLightNode.light = [SCNLight light];

    _ambientLightNode.light.type = SCNLightTypeAmbient;

    _ambientLightNode.light.color = [NSColor colorWithDeviceWhite:0.1 alpha:1.0];

    [scene.rootNode addChildNode:_ambientLightNode];

    // Create a plane in the background

    //   this will allow to test and play with the transparency settings

    SCNPlane *plane = [SCNPlane planeWithWidth:30 height:30];

    plane.firstMaterial.diffuse.contents = [NSImage imageNamed:@"checkboard"]; // Set a checkerboard in the background

    plane.firstMaterial.lightingModelName = SCNLightingModelConstant;          // Use the constant lighting model: we don't want the lighting to be applied to our background

    SCNNode *planeNode = [SCNNode node];

    planeNode.geometry = plane;

    planeNode.position = SCNVector3Make(0, 0, -10);

    planeNode.renderingOrder = -1; // render the background first to allow testing the "writeToDepthBuffer" property

    [scene.rootNode addChildNode:planeNode];

    // Create a node to attach the geometry later on

    self.modelNode = [SCNNode node];

    [scene.rootNode addChildNode:_modelNode];

    // Select a default model and material

    [self selectMaterialPresetAtIndex:2];

    self.modelIndex = 0;

    // Configure the view

    _view.scene = scene;

    _view.selectionDelegate = self;

    _view.backgroundColor = [NSColor clearColor];

}

#pragma mark - ASCViewDelegate

- (SCNNode *)selectedObjectForView:(ASCView *)view {

    return _modelNode;

}

#pragma mark - NSApplicationDelegate

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender {

    return YES;

}

@end