Dsenhar grafico seno, cosseno

Assuntos Gerais
#1

galera tem como eu desenha a funcao seno, cosseno???
se tiver como seria?

vlw

#2

vc ira usar a classe Math amigo aki tem tudo q vc precisa pra se virar

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Math.html

#3

Eu sei q isso me da o cosseno, etc… eu gostaria de saber como se faz para plotar isso… o desenho do cosseno, seno…

vlw

#4 
/*
 * plotmath.java
 *
 * Created on 29 de Março de 2008, 22:56
 */

package plotmath;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;

/**
 *
 * @author  luiz
 */
public class plotmath extends javax.swing.JFrame {
    
    /** Creates new form plotmath */
    public plotmath() {           
        initComponents();
    }

    
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">
    private void initComponents() {
        jPanel1 = new javax.swing.JPanel()
        {
            Graphics2D g;
            int antigoX=0;
            int antigoY=0;
            int x=0;
            int y=0;
            public void paintComponent( Graphics G)
            {
                g = (Graphics2D) G.create();
                plota();
                g.dispose();
            }

            private void plota()
            {
                int frequencia = this.getWidth();
                int amplitude = this.getHeight();
                g.setColor(Color.BLACK);

                for(double ang=0; ang<=360; ang+=10)
                {
                    x = (int) (frequencia*ang/360);
                    //tenta mudar aqui
                    y = (int) (Math.sin( (Math.PI*ang/180 )) * amplitude/2 ) ;
                    g.drawLine( antigoX, antigoY+ amplitude/2, x, y+ amplitude/2);
                    antigoX = x;
                    antigoY = y;
                }
                antigoX=0;
                antigoY=0;
            }
        };

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jPanel1.setBackground(new java.awt.Color(255, 255, 255));
        getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);

        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-400)/2, (screenSize.height-300)/2, 400, 300);
    }
    // </editor-fold>
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new plotmath().setVisible(true);
            }
        });
    }
    
    // Variables declaration - do not modify
    private javax.swing.JPanel jPanel1;
    // End of variables declaration
    
}
#5