Marbles Game

# This is a big one . Clean of most bugs but there are still a few
Fastgraphics
# graphics window size
graphsize 800,600
clg
fastgraphics
rem initial variables
nball=20
Dim x(nball)
Dim y(nball)
Dim vx(nball)
Dim vy(nball)
Dim mass(nball)
Dim colisionflag(nball,nball)
Dim bounceflag(nball)
ed=1
out=0
turn=1

# One can change the order of the levels here
gosub first
gosub waitfordirection
gosub new
gosub two
gosub waitfordirection
gosub new
gosub three
gosub waitfordirection
gosub new
gosub four
gosub waitfordirection
gosub new
gosub five
gosub waitfordirection
color white
font "arial",50,100
Text 170,200,"Hurray"
refresh
end
end


# These are the 5 levels it is easy to make more
first:
balls=2
tries=2
mass[0]=10: x[0]=250: y[0]=250
mass[1]=10: x[1]=100: y[1]=100
mass[2]=10: x[2]=400: y[2]=400
return

two:
balls=4
tries=4
mass[0]=10: x[0]=100: y[0]=100
mass[1]=10: x[1]=150: y[1]=150
mass[2]=10: x[2]=200: y[2]=200
mass[3]=10: x[3]=250: y[3]=250
mass[10]=20: x[10]=300: y[10]=300
return

three:
balls=5
tries=4
mass[0]=10: x[0]=100: y[0]=100
mass[1]=10: x[1]=200: y[1]=200

mass[3]=10: x[3]=400: y[3]=400
mass[10]=20: x[10]=400: y[10]=300
mass[11]=20: x[11]=350: y[11]=350
mass[12]=20: x[12]=250: y[12]=250
return

four:
balls=8
tries=6
mass[0]=10: x[0]=250: y[0]=250
mass[1]=10: x[1]=150: y[1]=150
mass[2]=10: x[2]=350: y[2]=350
mass[3]=10: x[3]=400: y[3]=100
mass[4]=10: x[4]=100: y[4]=400

mass[10]=20: x[10]=100: y[10]=100
mass[11]=20: x[11]=400: y[11]=400
mass[12]=20: x[12]=150: y[12]=350
mass[13]=20: x[13]=350: y[13]=150
return


five:
balls=8
tries=7
mass[0]=10: x[0]=250: y[0]=250
mass[1]=10: x[1]=100: y[1]=100
mass[2]=10: x[2]=400: y[2]=400
mass[3]=10: x[3]=400: y[3]=100
mass[4]=10: x[4]=100: y[4]=400

mass[10]=20: x[10]=150: y[10]=150
mass[11]=20: x[11]=350: y[11]=350
mass[12]=20: x[12]=150: y[12]=350
mass[13]=20: x[13]=350: y[13]=150
return


# Initializes the scenaries
new:
for u = 0 to 19
mass[u]=0: x[u]=0: y[u]=0
next u
return

waitfordirection:
do
clickclear
refresh
do
gosub drawtable
for u = 0 to 19
dx=mousex-x[0]
dy=mousey-y[0]
gosub drawball
next u

#cue
color white
line mousex+100*dx,mousey+100*dy,x[0],y[0]
color red
line mousex,mousey,x[0],y[0]
circle mousex,mousey,3
refresh
dist=(dx^2+dy^2)^.5
vx[0]=(clickx-x[0])*dist/10000
vy[0]=(clicky-y[0])*dist/10000
until clicky >0
gosub round
until out = balls or  tries = 0
turn=turn+1
out=0
return


round:
tries=tries-1
do
gosub drawtable
for u = 0 to 19
# balls out
goingout=false
if mass[u]>0 and (x[u]>450 or x[u]<50 or y[u]>450 or y[u]<50) then
         goingout=true
         mass[u]=mass[u]-1
         if mass[u]=0 then
         goingout=true
         out = out + 1
vx[u]=0
vy[u]=0
y[u]=0
x[u]=0
end if
# White out
if u = 0 then gosub finish
end if

# drag
vx[u]=vx[u]*0.993
vy[u]=vy[u]*0.993
x[u]=x[u]+vx[u]
y[u]=y[u]+vy[u]
# draw
gosub drawball
next u
refresh
gosub colision
total_speed=0

for marble = 0 to 19
total_speed=total_speed+abs(vx[marble])+abs(vy[marble])
next marble
until total_speed<1 and goingout=false
if tries = 0 and out < balls then gosub finish
#  reset the marble for the next round
for marble = 0 to 19
vx[marble]=0
vy[marble]=0
next marble
return

finish:
color white
font "arial",50,100
Text 170,200,"Oops"
refresh
end
return

drawtable:
color blue
rect 0,0,800,600
for grad=1 to 10
color rgb (0,83+4*grad,0)
rect 50+grad,50+grad,400-grad*2,400-grad*2
rect 500+grad,50+grad, 250-grad*2,400-grad*2
next grad


color rgb (0,83,0)
font "arial",22,100
Text 530,70, "Round nº :"+turn
Text 530,120,"Shots left :"+tries
Text 530,170,"____________"
Text 530,220,"Shoot the"
Text 530,270,"yellow balls"
Text 530,320,"out of the mat"
return


drawball:
font "arial",8,100
if mass[u]>0 then
for k = 1 to mass[u]
color rgb (200*(1.2-1/k),200*(1.2-1/k),0)
if u = 0 then color rgb ( 200*(1.2-1/k), 200*(1.2-1/k), 200*(1.2-1/k))
circle x[u],y[u],mass[u]-k
next k
end if

return

colision:
rem collision detection
for u1 = 0 to 18
for u2 = u1+1 to 19
dx = x[u2]-x[u1]
dy = y[u2]-y[u1]
distance = (dx*dx+dy*dy)^.5
if distance < (mass[u1]+mass[u2])and x[u2]<450 and x[u2]>50 and y[u2]<450 and y[u2]>50 then
if colisionflag[u1,u2]=0 then
rem vx and vy calc
sound 1000,7
ax=dx/distance
ay=dy/distance
va1=vx[u1]*ax+vy[u1]*ay
vb1=-vx[u1]*ay+vy[u1]*ax
va2=vx[u2]*ax+vy[u2]*ay
vb2=-vx[u2]*ay+vy[u2]*ax
vaP1=va1 + (1+ed)*(va2-va1)/(1+mass[u1]/mass[u2])
vaP2=va2 + (1+ed)*(va1-va2)/(1+mass[u2]/mass[u1])
vx[u1]=vaP1*ax-vb1*ay
vy[u1]=vaP1*ay+vb1*ax
vx[u2]=vaP2*ax-vb2*ay
vy[u2]=vaP2*ay+vb2*ax
colisionflag[u1,u2]=1
end if
else
colisionflag[u1,u2]=0
end if
next u2
next u1
return