i have difficulties in separating logic of game view. view should dumb , render current state of model. can not figure out how that. please me in making code simpler , separating logic form? because want extend game , add new things can not because of confusing form of code. new in java.
import javax.swing.*; import java.awt.*; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.awt.geom.*; public class projectileshootertest { public static void main(string[] args) { swingutilities.invokelater(new runnable() { @override public void run() { createandshowgui(); } }); } private static void createandshowgui() { jframe f = new jframe(); f.setdefaultcloseoperation(jframe.exit_on_close); f.setsize(600, 600); final projectileshooter projectileshooter = new projectileshooter(); projectileshooterpanel projectileshooterpanel = new projectileshooterpanel( projectileshooter); projectileshooter.setpaintingcomponent(projectileshooterpanel); jpanel controlpanel = new jpanel(new gridlayout(1, 0)); controlpanel.add(new jlabel("angle")); final jslider angleslider = new jslider(0, 90, 45); controlpanel.add(angleslider); controlpanel.add(new jlabel("power")); final jslider powerslider = new jslider(0, 100, 50); controlpanel.add(powerslider); jbutton shootbutton = new jbutton("shoot"); shootbutton.addactionlistener(new actionlistener() { @override public void actionperformed(actionevent e) { int angledeg = angleslider.getvalue(); int power = powerslider.getvalue(); projectileshooter.setangle(math.toradians(angledeg)); projectileshooter.setpower(power); projectileshooter.shoot(); } }); controlpanel.add(shootbutton); f.getcontentpane().setlayout(new borderlayout()); f.getcontentpane().add(controlpanel, borderlayout.north); f.getcontentpane().add(projectileshooterpanel, borderlayout.center); f.setvisible(true); } } class projectileshooter { private double anglerad = math.toradians(45); private double power = 50; private projectile projectile; private jcomponent paintingcomponent; void setpaintingcomponent(jcomponent paintingcomponent) { this.paintingcomponent = paintingcomponent; } void setangle(double anglerad) { this.anglerad = anglerad; } void setpower(double power) { this.power = power; } void shoot() { thread t = new thread(new runnable() { @override public void run() { executeshot(); } }); t.setdaemon(true); t.start(); } private void executeshot() { if (projectile != null) { return; } projectile = new projectile(); point2d velocity = affinetransform.getrotateinstance(anglerad).transform( new point2d.double(1, 0), null); velocity.setlocation(velocity.getx() * power * 0.5, velocity.gety() * power * 0.5); projectile.setvelocity(velocity); long prevtime = system.nanotime(); while (projectile.getposition().gety() >= 0) { long currenttime = system.nanotime(); double dt = 3 * (currenttime - prevtime) / 1e8; projectile.performtimestep(dt); prevtime = currenttime; paintingcomponent.repaint(); try { thread.sleep(10); } catch (interruptedexception e) { thread.currentthread().interrupt(); return; } } projectile = null; paintingcomponent.repaint(); } projectile getprojectile() { return projectile; } } class projectile { private final point2d acceleration = new point2d.double(0, -9.81 * 0.1); private final point2d position = new point2d.double(); private final point2d velocity = new point2d.double(); public point2d getposition() { return new point2d.double(position.getx(), position.gety()); } public void setposition(point2d point) { position.setlocation(point); } public void setvelocity(point2d point) { velocity.setlocation(point); } void performtimestep(double dt) { scaleaddassign(velocity, dt, acceleration); scaleaddassign(position, dt, velocity); } private static void scaleaddassign(point2d result, double factor, point2d addend) { double x = result.getx() + factor * addend.getx(); double y = result.gety() + factor * addend.gety(); result.setlocation(x, y); } } class projectileshooterpanel extends jpanel { private final projectileshooter projectileshooter; public projectileshooterpanel(projectileshooter projectileshooter) { this.projectileshooter = projectileshooter; } @override protected void paintcomponent(graphics gr) { super.paintcomponent(gr); graphics2d g = (graphics2d) gr; projectile projectile = projectileshooter.getprojectile(); if (projectile != null) { g.setcolor(color.red); point2d position = projectile.getposition(); int x = (int) position.getx(); int y = getheight() - (int) position.gety(); ellipse2d.double gerd = new ellipse2d.double(x - 01, y - 10, 20, 20); g.draw(gerd); // g.filloval(x-01, y-10, 20, 20); } rectangle hadaf1 = new rectangle(450, 450, 50, 50); rectangle hadaf2 = new rectangle(500, 450, 50, 50); rectangle hadaf3 = new rectangle(475, 400, 50, 50); g.draw(hadaf1); g.draw(hadaf2); g.draw(hadaf3); } } i thankful.
Comments
Post a Comment