import static java.lang.Math.PI;
import static java.lang.Math.cos;
import static java.lang.Math.sin;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.anotherbigidea.flash.SWFConstants;
import com.anotherbigidea.flash.interfaces.SWFShape;
import com.anotherbigidea.flash.interfaces.SWFTagTypes;
import com.anotherbigidea.flash.structs.Color;
import com.anotherbigidea.flash.structs.Matrix;
import com.anotherbigidea.flash.structs.Rect;
import com.anotherbigidea.flash.writers.SWFWriter;
import com.anotherbigidea.flash.writers.TagWriter;

public class SWFTest extends HttpServlet {
	final static int TWIPS = SWFConstants.TWIPS;
	final static int SCALE = 100;
	@Override
	public void doGet(HttpServletRequest request, HttpServletResponse response)
	throws IOException, ServletException {
		
		int numPoints=5;    // 規定値を代入しておく
		try {
			numPoints = Integer.parseInt(request.getParameter("n"));
		} catch (Exception e) {}
		int numFrames = 24; // 規定値を代入しておく
		try {
			numFrames = Integer.parseInt(request.getParameter("d"));
		} catch (Exception e) {}
		
		response.setContentType("application/x-shockwave-flash");
		
		SWFWriter writer = new SWFWriter(response.getOutputStream());
		SWFTagTypes swf  = new TagWriter(writer);
		
		swf.header(5, //Flash versions
				-1, //unknown length
				2 * SCALE * TWIPS, //width in twips
				2 * SCALE * TWIPS, //height in twips
				6, //frames per sec
				-1); //frame count to be determined	
		
		swf.tagSetBackgroundColor(new Color(255, 255, 255));
		
		// 図形（赤い四角形）の定義
		SWFShape shape =
			swf.tagDefineShape2(1, new Rect(-SCALE*TWIPS, -SCALE*TWIPS, SCALE * TWIPS, SCALE * TWIPS));
		shape.defineLineStyle(2 * TWIPS, new Color(0, 0, 255));
		shape.setLineStyle(1);
		int i, j;
		for (i=0; i<numPoints; i++) {
			double theta1 = 2*PI*i/numPoints;
			int x1 = (int)(SCALE*TWIPS*cos(theta1));
			int y1 = (int)(SCALE*TWIPS*sin(theta1)); 
			shape.move(x1, y1); 
			for(j=i+1; j<numPoints; j++) {
				double theta2 = 2*PI*j/numPoints;
				int x2 = (int)(SCALE*TWIPS*cos(theta2));
				int y2 = (int)(SCALE*TWIPS*sin(theta2)); 
				shape.line(x2-x1, y2-y1);
				shape.move(x1, y1);
			}
		}
		shape.done();
		
		// 図形の配置
		swf.tagPlaceObject2(false, -1, 1, 1, new Matrix(SCALE * TWIPS, SCALE * TWIPS),
				null, -1, "rect", 0);
		swf.tagShowFrame();
		
		// アニメーション
		int k;
		for(k=0; k<numFrames; k++) {
			double theta = 2*PI*k/numFrames;
			double c = cos(theta);
			double s = sin(theta);
			swf.tagPlaceObject2(true, -1, 1, 1, new Matrix(c, c, s, -s, SCALE*TWIPS, SCALE*TWIPS), 
					null, -1, null, 0);
			swf.tagShowFrame();	
		}
		swf.tagEnd();
		
	}
}