# The 200 line 3d networked shooter # Copyright 2000 by Sebastien Loisel # Permission to use, modify and redistribute this file is granted to all # without restrictions. # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE # SOFTWARE. from libgtc import * # Get GTC from whrandom import *# Random number generator from time import * # To keep track of time from math import * # For the linear algebra scene=Scene() # Make a new scene scene.context=defaultContext() # Give it a default context table=Table("",2) # Load a table of primitives (eg, the ship) seed() # Seed the random number generator # A duck is one ship in the universe class Duck: speed=0.0 # Default speed is zero trigger=0 # Trigger is when the player wants to shoot up=0 # Up is when you press cursor up down=0 # Cursor down left=0 # Cursor left right=0 # Cursor right die=0 # This is a timer. If it reaches zero and diesoon==1 # then this duck is dead. diesoon=0 # Set to one if you want to use the timeout thing (die) autosteer=0 # This is for computer controlled players acks=0 # And this is for human players ackmax=1 # same def __init__(self, HP, S, z): self.hp=HP # Set initial hit points self.size=S # And size (radius) for collision detection self.pos=Xform() # Position is a transform node self.pos.child=table.index(z) # Child of position is ship or bullet self.rep=scene.add(self.pos) # Add self to the scene # Create a new player def player(): ret=Duck(10,1,2) # 10 hit points, radius=1, table[2] is ship (x,y,z)=(random()*20,random()*20,random()*20) X=xlat(x,y,z) # Get a random position in the cube [0,20]x[0,20]x[0,20] # Also get a random rotation R=rot(random()-.5,random()-.5,random()-.5, random()*6.29) # Set the orientation to the rotation and translation we've got ret.pos.A=mul(X,R) return ret # Create a computer controlled ship def computer(): ret=player() # Get a ship as normal ret.autosteer=1 # Set autosteer return ret def vecadd(a,b): # Add two 4-vectors but set the fourth component to 1 return (a[0]+b[0],a[1]+b[1],a[2]+b[2],1.0) def vecsub(a,b): # Sub two 4-vectors but set the fourth component to 1 return (a[0]-b[0],a[1]-b[1],a[2]-b[2],1.0) def norm(a): # Norm of a 4-vector, ignoring the fourth component return sqrt(a[0]*a[0]+a[1]*a[1]+a[2]*a[2]) def scale(s,v): # Scale a 4-vector but set the fourth component to 1 return (s*v[0],s*v[1],s*v[2],1.0) def shoot(pl): # Ship shoots a bullet ret=Duck(1,.1,1) # Get a bullet (hp=1, size=0.1, table[1] is a bullet) ret.speed=5.0 # Make it fast # Make its position same as that of pl, but move it # forward a bit ret.pos.A=(pl.pos.A[0],pl.pos.A[1],pl.pos.A[2], vecadd(pl.pos.A[3],scale(1.5,pl.pos.A[2]))) ret.diesoon=1 # Make bullets only last a little while ret.die=2.0 # Two seconds to be precise return ret def collide(world): # Check for collisions zoo=world[:] # Make a copy of the world to iterate over for x in zoo: # Check all pairs (x,y) for collision for y in zoo: if x==y: # If x==y, ignore continue # Else, calculate the distance between x and y foo=norm(vecsub(x.pos.A[3],y.pos.A[3])) # If x and y are closer than they should # and they are still alive, cause damage if foo0 and y.hp>0 : temp=x.hp x.hp=x.hp-y.hp y.hp=y.hp-temp for x in zoo: # Now for every ship in the world if x.hp<=0: # If it's dead x.rep.dead=1 # Remove it world.remove(x) # Move all ships according to speed and such def animate(world,dt): foo=world[:] # Duplicate world for x in foo: # For each ship # Remove it if it's dead if x.rep.dead==1: world.remove(x) continue # Advance the ship x.pos.A=(x.pos.A[0],x.pos.A[1],x.pos.A[2], vecadd(x.pos.A[3],scale(x.speed*dt,x.pos.A[2]))) # Steer (up/down, left/right) A=rot(1,0,0,(x.down-x.up)*dt) B=rot(0,1,0,(x.left-x.right)*dt) x.pos.A=mul(x.pos.A,mul(A,B)) # Shoot if x.trigger==1: x.trigger=0 world.append(shoot(x)) # If this is a bullet, need to count time if x.diesoon==1: if x.die<=0: # If it's timed out x.rep.dead=1 # kill it world.remove(x) else: x.die=x.die-dt # Decrease time to live # This handles keypresses and keyreleases # I apologize for the weird hexadecimal numbers. You can find them # in /usr/X11R6/include/X11/keysymdef.h, I should make these more reasonable. def setkey(duck,k,state): if k==0xff52: # up duck.up=state elif k==0xff53: # right duck.right=state elif k==0xff54: # down duck.down=state elif k==0xff51: # left duck.left=state elif k>=0x31 and k<=0x39: # 0x31 is 1, 0x39 is 9, this is for speed duck.speed=(k-0x31)/3.0 elif k==0x20: # 0x20 is space duck.trigger=state # Do everything def mainloop(): people=[] scene.add(table.index(5)) # weird animated ship is client-side script world=[] # make an empty world for x in range(10): # Add 10 computer controlled opponents world.append(computer()) host=Host(4000) # Create a new host t=time() # Get the current time while 1: # Then, repeat forever the main loop host.process(.0) # Process any communication from clients event=host.get_event() # If there are new events while event != None: # Process them who=event["who"] # This is the source of the event if event["type"]==3: # type 3 means new client connected who.data=player() # Make a new ship for this client who.req_ack() # Client should send an ack who.data.acks=who.data.acks+1 who.table("") # Tell the client which table to use who.end() # End this communication world.append(who.data) # Add it to the world people.append(who) else: # It's not a new client if event["type"]==4: # Client disconnected, clean up print "poor client dead" who.data.rep.dead=1 people.remove(who) if who.data.rep.dead==1: # If its ship is dead who.dead=1 # Kill the client else: # Otherwise, the ship is not dead if event["type"]==1: # If this is a keypress, process it setkey(who.data,event["key"],1) elif event["type"]==2: # Keyrelease, process it setkey(who.data,event["key"],0) elif event["type"]==5: # Client sent an ack, send new frame who.data.acks=who.data.acks-1 if who.data.ackmax<3: who.data.ackmax=who.data.ackmax+1 for who in people: if who.data.acks