/*-- 
	Cool Cavern
	Author: Maikel
		
	Cavern with lots of snow, ice, rock and dirt.		
--*/


// Randomly placed material specks according to rndchecker.
overlay MatRC {				
	algo=rndchecker; a=8;
	zoomX=-50; zoomY=-50;
	turbulence=100; loosebounds=1;
};

// Fills an overlay with earth and materials.
overlay MatFill {
	overlay { mat=Earth; tex=earth_root; loosebounds=1; };
	MatRC { mat=Ore; tex=ore; a=20; };
	MatRC { mat=Snow; tex=snow1; a=20; };
	MatRC { mat=Granite; tex=granite; a=20; };
	MatRC { mat=Rock; tex=rock; a=20; };
	MatRC { mat=Ore; tex=ore; a=20; };
	MatRC { mat=Ice; tex=ice2; a=20; };
	MatRC { mat=Snow; tex=snow1; a=20; };
	MatRC { mat=Ice; tex=ice2; };
	MatRC { mat=Rock; tex=rock; };
	MatRC { mat=Tunnel; tex=tunnel; };
	MatRC { mat=Earth; tex=earth; };
	MatRC { mat=Earth; tex=earth_root; };
	overlay { 
		algo=lines;	a=3; b=16;
		rotate=45;
		turbulence=100;
		mat=Tunnel; tex=tunnel;
	};
	overlay { 
		algo=lines;	a=3; b=16;
		rotate=-45;
		turbulence=100;
		mat=Tunnel; tex=tunnel;
	};
};

// Randomly placed material specks according to bozo.
overlay MatBozo {				
	algo=bozo; a=5;
	turbulence=1000; loosebounds=1;
};

// Fills an overlay with ice, tunnel, rock and granite.
overlay BorderFill {
	overlay { mat=Rock; tex=rock; loosebounds=1;
		MatBozo { mat=Tunnel; tex=tunnel; };
		MatBozo { mat=Rock; tex=rock; a=6; };
		MatBozo { mat=Granite; tex=granite; a=14; };
		MatBozo { mat=Ice; tex=ice2; a=8; };
		MatBozo { mat=Tunnel; tex=tunnel; };
	};
};

// A lengthy vertical cavern surrounded by ice, dirt and rock.
map Cavern {
	overlay {
		// Cut cavern out of the landscape.
		x=40; wdt=20; y=-6; hgt=100;
		turbulence=100; lambda=4;
		loosebounds=1;
	} ^ overlay {
		// Fill remaining area with MatFill.
		MatFill;
		// And create a border around this area.
		overlay { 
			algo=border; a=4; b=4;
			// Fill border with BorderFill.
			BorderFill;
		};
	};
};