% Team OD-3 Estabrook Critter Conker Project


% Clear memory.
clear all;
clc;

% Get Input Data

Velball_Tdistance = inputdlg({'Initial Velocity of Paintball (ft/s)','Distance from Launch Point(ft)'},...
    'The Estabrook Critter Conker',[1 60; 1 60],{'35','20'},'on'),
Velball = eval(char(Velball_Tdistance(1)));
Tdistance = eval(char(Velball_Tdistance(2)));

%check distance 
while Tdistance<20 | Tdistance>30 
    check_distance=inputdlg('Valid range for target distance is 20ft - 30ft.',...
        'Error!',[1 60],{'20'},'on');
 Tdistance=eval(char(check_distance));
end

%Define Constants and dimensions of target and wall
Target_x = Tdistance;
Target_y = 0;
dwall_x = 10; %distance from origin
hwall_y = 4;  %wall height
G = -32.2; % accel grav
x_0 = 0;  %Launch pad position
y_0 = 0;  % "  "
time = 0.001;

% Convert Degrees to Radians
d2r = inline('a.*pi./180');

%target hit loop
j=1
while j>0 & j <= 90
    wall = y_0 + (tan(d2r(j)).*dwall_x) + (.5.*G.*((dwall_x./(Velball.*cos(d2r(j)))).^2));
if wall<hwall_y+.5
    j=j+.1;
elseif wall>=hwall_y+.5
    h0_1 = y_0 + (tan(d2r(j)).*Target_x) + (.5.*G.*((Target_x./(Velball.*cos(d2r(j)))).^2));
    if h0_1>Target_y
        j=j+.1;
elseif h0_1<=Target_y
    vx_0 = Velball .* cos(d2r(j)); % X-component of ball velocity
    vy_0 = Velball .* sin(d2r(j)); % Y-component of ball velocity
   
k = 1
x1(k) = x_0;
y1(k) = y_0;
vx1_(k) = vx_0;
vy1_(k) = vy_0;

% increment until target is hit
while y1(k)>=Target_y
vx1_(k+1) = vx1_(k);
vy1_(k+1) = vy1_(k) + (G .* time) ;
x1(k+1) = x1(k) + ((vx1_(k)).* time);
y1(k+1) = y1(k) + (vy1_(k).*time) + (.5.*G.*(time.^2));
k=k+1;
end
if ceil(x1(k)+.25)<Target_x 
    check_VelBall=inputdlg('Please re-enter a higher initial velocity',...
        'Error! Velocity too low!',[1 60],{'50'},'on');
    VelBall=eval(char(check_VelBall(1)));
    j=1;
else
    break
end
end
end

 if j>90
     check_Velball=inputdlg('Please re-enter a higher initial velocity',...
         'Error! Velocity too low!',[1 60],{'50'},'on');
     Velball=eval(char(check_Velball(1)));
     j=1;
 end
     time_air=Target_x./(Velball.*cos(d2r(j)));
 end    


% Activate figure 1 and clear all values
figure(1);
clf reset;
hold on;
axis([ -.5 30 -.5 20]);

%wall coordinates
box_x=[dwall_x dwall_x dwall_x+.3 dwall_x+.3];
box_y=[0 hwall_y hwall_y 0];

plot(x1,y1,'b-', box_x, box_y,'k');

%Annotate Plot
title('Estabrook Critter Conker - Team OD-3 - 4/25/03');
xlabel('Horizontal Position - ft');
Ylabel('Vertical Position - ft');
%text(.5,.9.*(h0+tl+3),['Launch height=',num2str(y0,2),'ft']);
text(20,18,['Distance = ',num2str(Target_x,2),' ft']);
text(20,17,['Angle = ',num2str(j,2),'^o']);
text(20,16,['Time in Air = ',num2str(time_air,2),' secs']);

%End of Program<!--'"</title></head>-->

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