package sample.svg;
import static util.SVGUtil.*;

public class CharRainbow {

	private final static String str[] = {
			"🌷",
			"香",
			"🌸",
			"川", 
			"🌹",
			"大", 
			"🌺",
			"学", 
			"🌻",
			"工", 
			"🌼",
			"学", 
			"🍀",
			"部",
			"🍁",
			"🍅",
			"🍇",
			"🍊",
			"🍌",
			"🍍",
			"🍎",
			"🍑",
			"🍒",
			"🍓",
	};
	private static final int numStr = str.length;
	private static int k = 0;
	
	private static String nextStr() {
		String ret = str[k++];
		if (k >= numStr) {
			k=0;
		}
		return ret;
	}

	private static final double hues[] = { 0, 0.111, 0.222, 0.333, 0.5, 0.666, 0.777 }; /* これくらいが自然？ */
	private static final double maxR = 115, minR = 85;  /* 外側の虹、内側の虹の半径 */
	private static final int space = 7;  /* 文字の間隔の目安 */
	private static final int num = hues.length;   /* 虹の色数 */

	public static void main(String[] args) {
		int i, j;
		double x0 = centerX(), y0 = centerY()*1.6;
		double fontSize = 6;    /* フォントサイズ */

		start();
		rulers();
		textFont("Arial", fontSize);
		for (i=0; i<num; i++) {
			double r, len;
			int n; 
			r = maxR + (minR-maxR)/(num-1)*i;
			len = PI*r;
			n = (int) (len / space); 
			fill(hsb1(hues[i], 1, 1));
			for (j=0; j<=n; j++) {
				double angle = - PI +  PI * j / n;
				double x = Math.cos(angle), y = Math.sin(angle);
				text(nextStr(), x0+r*x-fontSize/2, y0+r*y+fontSize/2);
			} 
		}
		finish();
	}
}