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

/*
 *  SphericalEarth.h
 *  WhirlyGlobeLib
 *
 *  Created by Steve Gifford on 1/11/11.
 *  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 <math.h>
#import "WhirlyVector.h"
#import "TextureGroup.h"
#import "GlobeScene.h"
#import "DataLayer.h"
#import "RenderCache.h"

// Each chunk of the globe is broken into this many units
static const unsigned int SphereTessX = 10,SphereTessY = 25;
//static const unsigned int SphereTessX = 20,SphereTessY = 50;

@interface SphericalEarthLayer : NSObject<WhirlyGlobeLayer>
{
        TextureGroup *texGroup;
        WhirlyGlobe::GlobeScene *scene;
        unsigned int xDim,yDim;
        unsigned int chunkX,chunkY;
    bool savingToCache;
    NSString *cacheName;
    WhirlyGlobe::RenderCacheWriter *cacheWriter;
    float fade;
//      float radius;  // 1.0 by default
}

@property (nonatomic,assign) float fade;

- (id)initWithTexGroup:(TextureGroup *)texGroup;

- (id)initWithTexGroup:(TextureGroup *)texGroup cacheName:(NSString *)cacheName;

- (void)saveToCacheName:(NSString *)cacheName;

- (void)startWithThread:(WhirlyGlobeLayerThread *)layerThread scene:(WhirlyGlobe::GlobeScene *)scene;

- (float)smallestTesselation;

@end