MPPG tutorial

Simple mppg application

Application with editable inputs




Lets draw something

#include <mpp/mpp_window.h>
#include <mpp/draw.h>
using namespace mpp;
double phi0=M_PI/4;
Scale scale(0.0, 1.0, 0.0, 1.0);
void ud(){
    set_scale(scale);
    set_color(FL_RED);
    line(0,0,0.05*cos(phi0),0.05*sin(phi0));
}

int main(){
    Mpp_window win;
    win.table.add_item("phi_0 = ", phi0);
    win.canvas.add_shape(new User_draw(ud));
    return run();                               
}


Add calculation thread

#include <mpp/mpp_window.h>
#include <mpp/draw.h>
using namespace mpp;
double phi0=M_PI/4, v0=1.0;
double x=0.0, y=0.0, g=1.0;
double dt=1e-5;
Scale scale(0.0, 1.0, 0.0, 1.0);
void ud(){
    set_scale(scale);
    set_color(FL_RED);
    line(0,0,0.05*cos(phi0),0.05*sin(phi0));
    set_color(FL_YELLOW);
    pointb(x,y);
}
void f(){
    double vx=v0*cos(phi0), vy=v0*sin(phi0);
    x=y=0.0;
    while(may_i_repeat()){
        vy+=-g*dt;
        x+=vx*dt;
        y+=vy*dt;   
        ask_update();
    }   
}
int main(){
    Mpp_window win;
    win.table.add_item("phi_0 = ", phi0);
    win.table.add_item("dt = ", dt);
    win.canvas.add_shape(new User_draw(ud));
    set_work(f);
    return run();                               
}


Add some shapes

#include <mpp/mpp_window.h>
#include <mpp/draw.h>
using namespace mpp;
double phi0=M_PI/4, v0=1.0;
double x=0.0, y=0.0, g=1.0;
double dt=1e-3;
Scale scale(0.0, 1.0, 0.0, 1.0,KEEP_RATIO);
Orbit orbit(10000,100,FL_RED, FL_YELLOW,scale);
Grid grid(0,0.2,0,0.2,scale);
void ud(){
    set_scale(scale);
    set_color(FL_RED);
    line(0,0,0.05*cos(phi0),0.05*sin(phi0));
}
void f(){
    double vx=v0*cos(phi0), vy=v0*sin(phi0);
    x=y=0.0;
    while(may_i_repeat()&&y>=0.0){
        vy+=-g*dt;
        x+=vx*dt;
        y+=vy*dt;   
        orbit.add(x,y);
        ask_update();
    }   
}
int main(){
    Mpp_window win;
    win.table.add_item("phi_0 = ", phi0);
    win.table.add_item("dt = ", dt);
    win.canvas.add_shape(new User_draw(ud));
    win.canvas.add_shape(orbit);
    win.canvas.add_shape(grid);
    win.canvas.scale(scale);
    set_work(f);
    return run();                               
}