Hello everyone,
in this code the object "motorcycle" moves and never finishes the initial force, never decreases the thrust:
http://www.openprocessing.org/sketch/1088

1. class Motorcycle
   {
    
     Land land;
     int x;
     int w;
     int indent;
     float h1, h2;
     float jumpSpeed;
     float gravity;
     float initialJumpSpeed;
     PShape s;
    
     float speed;
     float acceleration;
     float theta;
     boolean jumping;
     boolean debug;
   
     Motorcycle( Land land )
     {
    
    
   
       this.land = land;
       s = loadShape("motorcycle.svg");
       s.scale( -1, 1 );
       s.translate( -s.width, 0 );
       x = width/3;
       w = (int)s.width; 
       indent = 25;
       jumpSpeed = 20;
       initialJumpSpeed = jumpSpeed;
       gravity = .3;
       speed = 0;
       acceleration = .2;
       theta = 0;
       h1 = land.getY(x+indent);
       h2 = land.getY(x+int(s.width)-indent);
     } 
   
     void display()
     {
       int x1, x2, y1, y2;
       x1 = x + indent;
       x2 = x + (int)s.width - indent;
       y1 = land.getY( x1 );
       y2 = land.getY( x2 );
       if( debug )
       {
       
         fill(255,200,200);
         //fill( 255, 0, 0 );
         //stroke( 255, 0, 0 );
         ellipse( x1, y1, 10, 10 );
         ellipse( x2, y2, 10, 10 );
         line( x1, y1, x2, y2 );
       }
       jumpSpeed -= gravity;
       if( h1 >= y1 )
       {
         h1 = y1;
       }
       else
       {
         h1 -= jumpSpeed;      
       }
       if( h2 >= y2 )
       {
         h2 = y2;
       }
       else
       {
         h2 -= jumpSpeed;
       }
       if( h1 >= y1 && h2 >= y2 )
       {
         theta = atan2( y2 - y1, x2 - x1 );
         jumpSpeed = -1*speed*sin( theta );
       }
       translate( x1, h1 );
       rotate( theta );
       shape( s, -indent, -s.height );     
     }
    void jump()
     {
       if(! jumping )
       {
         jumping = true;
         jumpSpeed = initialJumpSpeed;
         h1 -= jumpSpeed;
         h2 -= jumpSpeed;
         jumpSpeed -= gravity;
       }
   
     else{  jumping = false; gravity = 1.3;}
    }
   
     void move()
     {
       land.displace( int(speed) );
     }
   
     void accelerate()
     {
       speed += acceleration;
     }
   
     void slowDown()
     {
       if( speed > 0 )
       {
         speed -= acceleration;
       }
     }
   }
   

How I can do to make moves the object "motorcycle", for example, only 5 x at a time?

thanks

Hi,
In this project http://www.openprocessing.org/sketch/1088   I want to import an image file (test.png).

In the first sketc

1. Land land;
   Motorcycle motorcycle;
   
   
   void setup()
   {
   
     size( 400,400);
     smooth();
     land = new Land( 80 );
     motorcycle = new Motorcycle( land );
   
   }
    
   
      
   void draw()
   {
   
     if( keyPressed )
     {
       if( key == 'd' )
       {
         motorcycle.accelerate();
       }
       if( key == 'a' )
       {
         motorcycle.slowDown();
       }
       if( key == 'w' )
       {
       motorcycle.jump();
     }
   }
      
   
     background( 255 );
    
    // stroke( 150 );
     fill(204, 102, 0);
     //fill( 150 );
     land.display();
     motorcycle.move();
     motorcycle.display();
   
   }
   

and in the second sketc

1. class Motorcycle
   {
    
     Land land;
     int x;
     int w;
     int indent;
     float h1, h2;
     float jumpSpeed;
     float gravity;
     float initialJumpSpeed;
     PShape s;
    
     float speed;
     float acceleration;
     float theta;
     boolean jumping;
     boolean debug;
   
     Motorcycle( Land land )
     {
    
    
   
       this.land = land;
       s = loadShape("motorcycle.svg");
       s.scale( -1, 1 );
       s.translate( -s.width, 0 );
       x = width/3;
       w = (int)s.width; 
       indent = 25;
       jumpSpeed = 20;
       initialJumpSpeed = jumpSpeed;
       gravity = .3;
       speed = 0;
       acceleration = .2;
       theta = 0;
       h1 = land.getY(x+indent);
       h2 = land.getY(x+int(s.width)-indent);
     } 
   
     void display()
     {
       int x1, x2, y1, y2;
       x1 = x + indent;
       x2 = x + (int)s.width - indent;
       y1 = land.getY( x1 );
       y2 = land.getY( x2 );
       if( debug )
       {
       
         fill(255,200,200);
         //fill( 255, 0, 0 );
         //stroke( 255, 0, 0 );
         ellipse( x1, y1, 10, 10 );
         ellipse( x2, y2, 10, 10 );
         line( x1, y1, x2, y2 );
       }
       jumpSpeed -= gravity;
       if( h1 >= y1 )
       {
         h1 = y1;
       }
       else
       {
         h1 -= jumpSpeed;      
       }
       if( h2 >= y2 )
       {
         h2 = y2;
       }
       else
       {
         h2 -= jumpSpeed;
       }
       if( h1 >= y1 && h2 >= y2 )
       {
         theta = atan2( y2 - y1, x2 - x1 );
         jumpSpeed = -1*speed*sin( theta );
       }
       translate( x1, h1 );
       rotate( theta );
       shape( s, -indent, -s.height );     
     }
    void jump()
     {
       if(! jumping )
       {
         jumping = true;
         jumpSpeed = initialJumpSpeed;
         h1 -= jumpSpeed;
         h2 -= jumpSpeed;
         jumpSpeed -= gravity;
       }
   
     else{  jumping = false; gravity = 1.3;}
    }
   
     void move()
     {
       land.displace( int(speed) );
     }
   
     void accelerate()
     {
       speed += acceleration;
     }
   
     void slowDown()
     {
       if( speed > 0 )
       {
         speed -= acceleration;
       }
     }
   }
   

I tried to insert

PImage img; img = loadImage("test.png"); image(img, 0, 0);

but it does not appear the file image file on the screen. 
Why?

thanks

Hi,
In this project http://www.openprocessing.org/sketch/1088 by pressing the letter "w" the motorcycle jump, the code is:

1. if (key == 'w')
   {
   motorcycle.jump ();
   }
   
   void jump ()
   {
   if (jumping)
   {
   jumping = true;
   jumpSpeed ​​= initialJumpSpeed​​;
   h1 - = jumpSpeed​​;
   h2 - = jumpSpeed​​;
   jumpSpeed ​​- = gravity;
   }
   
   

the problem is that if I press continuously the letter "w" the motorcycle jump, never ceases to jump,
it is possible that there is only a jump even if I press continuously the letter "w"?

thanks for the help

Hello everyone,
I apologize for my English.
I did the download this project http://www.openprocessing.org/sketch/1088
but when I open it with the editor of processing (2 and 1.51) and push the button "run" I have several errors: duplicate field Land_4.land and others.
How can I solve these problems?
thanks