function RoundCornersModifier(){};
extendPrototype([ShapeModifier],RoundCornersModifier);
RoundCornersModifier.prototype.processKeys = function(forceRender){
    if(this.elem.globalData.frameId === this.frameId && !forceRender){
        return;
    }
    this.mdf = forceRender ? true : false;
    this.frameId = this.elem.globalData.frameId;
    var i, len = this.dynamicProperties.length;

    for(i=0;i<len;i+=1){
        this.dynamicProperties[i].getValue();
        if(this.dynamicProperties[i].mdf){
            this.mdf = true;
        }
    }
}
RoundCornersModifier.prototype.initModifierProperties = function(elem,data){
    this.getValue = this.processKeys;
    this.rd = PropertyFactory.getProp(elem,data.r,0,null,this.dynamicProperties);
};

RoundCornersModifier.prototype.processPath = function(path, round){
    var cloned_path = shape_pool.newElement();
    cloned_path.c = path.c;
    var i, len = path._length;
    var currentV,currentI,currentO,closerV, newV,newO,newI,distance,newPosPerc,index = 0;
    var vX,vY,oX,oY,iX,iY;
    for(i=0;i<len;i+=1){
        currentV = path.v[i];
        currentO = path.o[i];
        currentI = path.i[i];
        if(currentV[0]===currentO[0] && currentV[1]===currentO[1] && currentV[0]===currentI[0] && currentV[1]===currentI[1]){
            if((i===0 || i === len - 1) && !path.c){
                cloned_path.setTripleAt(currentV[0],currentV[1],currentO[0],currentO[1],currentI[0],currentI[1],index);
                /*cloned_path.v[index] = currentV;
                cloned_path.o[index] = currentO;
                cloned_path.i[index] = currentI;*/
                index += 1;
            } else {
                if(i===0){
                    closerV = path.v[len-1];
                } else {
                    closerV = path.v[i-1];
                }
                distance = Math.sqrt(Math.pow(currentV[0]-closerV[0],2)+Math.pow(currentV[1]-closerV[1],2));
                newPosPerc = distance ? Math.min(distance/2,round)/distance : 0;
                vX = iX = currentV[0]+(closerV[0]-currentV[0])*newPosPerc;
                vY = iY = currentV[1]-(currentV[1]-closerV[1])*newPosPerc;
                oX = vX-(vX-currentV[0])*roundCorner;
                oY = vY-(vY-currentV[1])*roundCorner;
                cloned_path.setTripleAt(vX,vY,oX,oY,iX,iY,index);
                index += 1;

                if(i === len - 1){
                    closerV = path.v[0];
                } else {
                    closerV = path.v[i+1];
                }
                distance = Math.sqrt(Math.pow(currentV[0]-closerV[0],2)+Math.pow(currentV[1]-closerV[1],2));
                newPosPerc = distance ? Math.min(distance/2,round)/distance : 0;
                vX = oX = currentV[0]+(closerV[0]-currentV[0])*newPosPerc;
                vY = oY = currentV[1]+(closerV[1]-currentV[1])*newPosPerc;
                iX = vX-(vX-currentV[0])*roundCorner;
                iY = vY-(vY-currentV[1])*roundCorner;
                cloned_path.setTripleAt(vX,vY,oX,oY,iX,iY,index);
                index += 1;
            }
        } else {
            cloned_path.setTripleAt(path.v[i][0],path.v[i][1],path.o[i][0],path.o[i][1],path.i[i][0],path.i[i][1],index);
            index += 1;
        }
    }
    return cloned_path;
}

RoundCornersModifier.prototype.processShapes = function(firstFrame){
    var shapePaths;
    var i, len = this.shapes.length;
    var j, jLen;
    var rd = this.rd.v;

    if(rd !== 0){
        var shapeData, newPaths, localShapeCollection;
        for(i=0;i<len;i+=1){
            shapeData = this.shapes[i];
            newPaths = shapeData.shape.paths;
            localShapeCollection = shapeData.localShapeCollection;
            if(!(!shapeData.shape.mdf && !this.mdf && !firstFrame)){
                localShapeCollection.releaseShapes();
                shapeData.shape.mdf = true;
                shapePaths = shapeData.shape.paths.shapes;
                jLen = shapeData.shape.paths._length;
                for(j=0;j<jLen;j+=1){
                    localShapeCollection.addShape(this.processPath(shapePaths[j],rd));
                }
            }
            shapeData.shape.paths = shapeData.localShapeCollection;
        }

    }
    if(!this.dynamicProperties.length){
        this.mdf = false;
    }
}


ShapeModifiers.registerModifier('rd',RoundCornersModifier);