buschtoens

function deg2rad(deg) {
	return deg * Math.PI / 180;
}

function annularSector(centerX, centerY, startAngle, endAngle, innerRadius, outerRadius) {
	startAngle = deg2rad(startAngle + 180);
	endAngle = deg2rad(endAngle + 180);
	
	var p = [
			[centerX + innerRadius * Math.cos(startAngle),	centerY + innerRadius * Math.sin(startAngle)]