import static util.Common.PI;
import static util.SVGUtil.*;

public class CharRainbow {
	private final static String str[] = {  // ★　絵文字などの指定
		"🌷",
		"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 };  /* 色相　これくらいが自然？ */
	private static final double maxR = 80, minR = 50;  /* 外側の虹、内側の虹の半径 */
	private static final int space = 6;                /* 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 fontSize = 5;    /* フォントサイズ */

		start();
		rulers();
		textFont("Segoe UI Symbol", fontSize);
		translate(centerX()-40, centerY()*1.6);
		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);
				pushMatrix();
				translate(r*x, r*y);
	            rotate(angle+PI/2);                  // ★　文字を常にまっすぐ立てるときはコメントアウト 
	            translate(-fontSize/2, fontSize/2);
				text(nextStr(), 0, 0);
				popMatrix();
			} 
		}
		finish();
	}
}