/Users/sjg/iPhone/WhirlyGlobe/WhirlyGlobeSrc/WhirlyGlobeLib/include/GlobeView.h

/*
 *  GlobeView.h
 *  WhirlyGlobeLib
 *
 *  Created by Steve Gifford on 1/14/11.
 *  Copyright 2011 mousebird consulting
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

#import <UIKit/UIKit.h>
#import "WhirlyVector.h"
#import "WhirlyGeometry.h"

@class WhirlyGlobeView;

@protocol WhirlyGlobeAnimationDelegate
- (void)updateView:(WhirlyGlobeView *)globeView;
@end

@interface WhirlyGlobeView : NSObject
{
        float fieldOfView;
        float imagePlaneSize;
        float nearPlane;
        float farPlane;
        
        float heightAboveGlobe;
        
        Eigen::Quaternion<float> rotQuat;
    
    NSDate *lastChangedTime;
    
    NSObject<WhirlyGlobeAnimationDelegate> *delegate;
}

@property (nonatomic,assign) float fieldOfView,imagePlaneSize,nearPlane,farPlane,heightAboveGlobe;
@property (nonatomic,assign) Eigen::Quaternion<float> rotQuat;
@property (nonatomic,retain) NSDate *lastChangedTime;
@property (nonatomic,retain) NSObject<WhirlyGlobeAnimationDelegate> *delegate;

- (void)calcFrustumWidth:(unsigned int)frameWidth height:(unsigned int)frameHeight ll:(Point2f &)ll ur:(Point2f &)ur near:(float &)near far:(float &)far;

- (float)minHeightAboveGlobe;
- (float)maxHeightAboveGlobe;

- (void)setHeightAboveGlobe:(float)newH;

- (void)cancelAnimation;

- (void)animate;

- (float)calcZbufferRes;

- (float)calcEarthZOffset;

- (Eigen::Affine3f)calcModelMatrix;

- (Eigen::Vector3f)currentUp;

+ (Eigen::Vector3f)prospectiveUp:(Eigen::Quaternion<float> &)prospectiveRot;

- (Point3f)pointUnproject:(Point2f)screenPt width:(unsigned int)frameWidth height:(unsigned int)frameHeight clip:(bool)clip;

- (bool)pointOnSphereFromScreen:(CGPoint)pt transform:(const Eigen::Affine3f *)transform frameSize:(const Point2f &)frameSize hit:(Point3f *)hit;

- (CGPoint)pointOnScreenFromSphere:(const Point3f &)worldLoc transform:(const Eigen::Affine3f *)transform frameSize:(const Point2f &)frameSize;

- (Eigen::Quaternionf) makeRotationToGeoCoord:(const WhirlyGlobe::GeoCoord &)worldLoc keepNorthUp:(BOOL)northUp;

@end