Source Code 1994 March

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Internet Message Format | 1992-04-09 | 47.4 KB

Path: uunet!zephyr.ens.tek.com!master!saab!billr From: billr@saab.CNA.TEK.COM (Bill Randle) Newsgroups: comp.sources.games Subject: v13i080: xasteroids2 - asteroids arcade game for X, Part01/01 Message-ID: <2667@master.CNA.TEK.COM> Date: 26 Mar 92 16:57:50 GMT Sender: news@master.CNA.TEK.COM Lines: 1515 Approved: billr@saab.CNA.TEK.COM Submitted-by: goetz@cs.Buffalo.EDU Posting-number: Volume 13, Issue 80 Archive-name: xasteroids2/Part01 Environment: X11, Xlib [I added a simple Imakefile and generated Makefile.std and split the doc file from the source file. -br] #! /bin/sh # This is a shell archive. Remove anything before this line, then unpack # it by saving it into a file and typing "sh file". To overwrite existing # files, type "sh file -c". You can also feed this as standard input via # unshar, or by typing "sh <file", e.g.. If this archive is complete, you # will see the following message at the end: # "End of archive 1 (of 1)." # Contents: README Imakefile Makefile.std ast.c ast.doc # Wrapped by billr@saab on Thu Mar 26 08:44:49 1992 PATH=/bin:/usr/bin:/usr/ucb ; export PATH if test -f 'README' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'README'\" else echo shar: Extracting \"'README'\" $4947 characters$ sed "s/^X//" >'README' <<'END_OF_FILE' X Here is the source to Xasteroids, version 4. Changes include better Xcollision detection, shields, & explosions. Many thanks to Peter XPhillips. If anyone wants the shorter & simpler version 3.1, write me. X X This program runs under UNIX in the X-Windows or OpenWindows Xenvironment. It could probably be modified for other operating systems Xwithout difficulty. I compile it under quasi-BSD with this command: X Xcc -I/util/X11/include -L/util/X11/lib ast.c -lX11 -lm -o ast.out -O X XThat is, include files /util/X11/include, use the library in /util/X11/lib, Xsource file ast.c, use the X11 library and the math library, object file Xwill be ast.out, and Optimize. X X Cut the stuff below into ast.docs and ast.c. Then compile ast.c. XI know it is bad practice to put everything in one file, but I wanted to Xmake it easy to compile. X X If you like the game, please send $5 to X X Phil Goetz X 4023 Huckleberry Row X Ellicott City, MD 21043 X X Even if you don't register, please send a note to my e-mail address Xso I know how many people use Xasteroids. Then I may be motivated to Xupdate it again, or write new programs... XSend any comments, suggestions, bug reports, modifications, etc., to X X goetz@cs.buffalo.EDU X X Lots of people have complained that Xasteroids wouldn't run fast Xenough on their display. I had different ideas on how to affect the speed, Xand implemented all of them. So Version 3 came with more speed controls Xthan most people like to think about: X X 1 2: Scale of movement (default 1): Increasing this causes each object to Xmove further every turn. XAdvantage: Can be changed in smaller amounts than moves/frame. XDisadvantage: Increasing it too much can cause bullets to fly through Xasteroids without hitting them. Looks jerky. X X v b: Moves per frame (default 1): Increasing this causes the main loop to Xexecute more times before updating the display. XAdvantages: Avoids the problem of bullets flying through asteroids. XDisadvantages: Increases only by integer amounts. X X , .: Delay: Used when your client runs too fast to play comfortably. X X n m: Object size: If your client is too slow, decrease the size and resize Xthe window to a smaller size. Then type 'x' to use XFillRectangle erase. X X x: XFillRectangle erase: Use XFillRectangle to erase the entire pixmap Xeach turn. Faster on small windows. X X u: Undraw erase: Erase each object line-by-line. Faster on big windows. X X Playing with scale of movement, object size, and window size can give you Xvery different games. X X There are 3 known bugs, which apply to all versions: X1. The window does not accept keyboard input. I think this only happens Xunder some versions of OpenWindows. Works under mine. X2. While the game is paused (with a 'p'), you can Xinput commands to change direction and thrust, and they will be executed. XSo this is a way of cheating. This could be corrected, but why bother? XIf you don't like it, don't do it. X3. Once, the game lost count of numasts and refused to give me a new asteroid Xfield. Only once. I have no idea why. One other person has also reported Xthis. X Also, David Elliot (dce@sonyusa.sony.com) says that he had to put Xan XSync(disp) after the XDrawLines call or he would get protocol errors. X X On anything slower than a SPARCstation 1, or on any color screen, Xit will really drag. There should be a way to set color screens to use Xa bitmap of depth 1, but I don't know how. Please tell me if you do. X The code is not optimized because the XWindows Xcalls take the vast majority of the time. I tried, for instance, Xreading sines and cosines from a table instead of calculating them - Xit made no noticeable difference in speed. Similarly, the collision Xdetection could be optimized only to check objects nearby - but why Xbother. Same goes for using registers, pointers to frequently-referenced Xarray elements, etc. It MIGHT make a significant difference in runtime Xif you replace the vector drawing with bitmaps. It runs a LOT slower on Xcolor displays. X The vast majority of time seems to be used in erasing the pixmap Xeach round, & there isn't much to do about that. My tests have indicated Xthat blanking individual asteroids rather than the whole screen would Xtake comparable time, unless you had a complicated routine to optimize Xblanking. X If you modify this program, please send me a copy. Modifications XI would like to see include: sound (esp. for Sparcstations), drawing Xthe asteroids to pixmaps so they can be put on the screen quicker X(though not much quicker - the X calls seem to take most of the time), Xan options screen to set parameters such as speed, whether bullets Xcan be fired before your current ones are dead, whether to start in the Xcenter of the screen between levels), a permanent high score file Xto be displayed sometimes between games, and jagged fractal asteroids X(not just removal of the lines to the center; I like those). END_OF_FILE if test 4947 -ne `wc -c <'README'`; then echo shar: \"'README'\" unpacked with wrong size! fi # end of 'README' fi if test -f 'Imakefile' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'Imakefile'\" else echo shar: Extracting \"'Imakefile'\" $115 characters$ sed "s/^X//" >'Imakefile' <<'END_OF_FILE' X# simple Imakefile for xasteroids XSRCS = ast.c XOBJS = ast.o X XEXTRA_LIBRARIES = -lX11 -lm X XSimpleProgramTarget(ast) END_OF_FILE if test 115 -ne `wc -c <'Imakefile'`; then echo shar: \"'Imakefile'\" unpacked with wrong size! fi # end of 'Imakefile' fi if test -f 'Makefile.std' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'Makefile.std'\" else echo shar: Extracting \"'Makefile.std'\" $10307 characters$ sed "s/^X//" >'Makefile.std' <<'END_OF_FILE' X# Makefile generated by imake - do not edit! X# $XConsortium: imake.c,v 1.65 91/07/25 17:50:17 rws Exp $ X# X# The cpp used on this machine replaces all newlines and multiple tabs and X# spaces in a macro expansion with a single space. Imake tries to compensate X# for this, but is not always successful. X# X X# ------------------------------------------------------------------------- X# Makefile generated from "Imake.tmpl" and </tmp/IIf.a06197> X# $XConsortium: Imake.tmpl,v 1.139 91/09/16 08:52:48 rws Exp $ X# X# Platform-specific parameters may be set in the appropriate <vendor>.cf X# configuration files. Site-specific parameters should be set in the file X# site.def. Full rebuilds are recommended if any parameters are changed. X# X# If your C preprocessor does not define any unique symbols, you will need X# to set BOOTSTRAPCFLAGS when rebuilding imake (usually when doing X# "make World" the first time). X# X X# ------------------------------------------------------------------------- X# site-specific configuration parameters that need to come before X# the platform-specific parameters - edit site.def to change X X# site: $XConsortium: site.def,v 1.2 91/07/30 20:26:44 rws Exp $ X X# ------------------------------------------------------------------------- X# platform-specific configuration parameters - edit sun.cf to change X X# platform: $XConsortium: sun.cf,v 1.69 91/09/09 18:23:59 rws Exp $ X X# operating system: SunOS 4.1.1 X X# $XConsortium: sunLib.rules,v 1.6 91/03/24 17:55:58 rws Exp $ X X# ------------------------------------------------------------------------- X# site-specific configuration parameters that go after X# the platform-specific parameters - edit site.def to change X X# site: $XConsortium: site.def,v 1.2 91/07/30 20:26:44 rws Exp $ X X SHELL = /bin/sh X X TOP = . X CURRENT_DIR = . X X AR = ar clq X BOOTSTRAPCFLAGS = X CC = cc X AS = as X X COMPRESS = compress X CPP = /lib/cpp $(STD_CPP_DEFINES) X PREPROCESSCMD = cc -E $(STD_CPP_DEFINES) X INSTALL = install X LD = ld X LINT = lint X LINTLIBFLAG = -C X LINTOPTS = -axz X LN = ln -s X MAKE = make X MV = mv X CP = cp X X RANLIB = ranlib X RANLIBINSTFLAGS = X X RM = rm -f X TROFF = psroff X MSMACROS = -ms X TBL = tbl X EQN = eqn X STD_INCLUDES = X STD_CPP_DEFINES = X STD_DEFINES = X EXTRA_LOAD_FLAGS = X EXTRA_LIBRARIES = X TAGS = ctags X X SHAREDCODEDEF = -DSHAREDCODE X SHLIBDEF = -DSUNSHLIB X X PROTO_DEFINES = X X INSTPGMFLAGS = X X INSTBINFLAGS = -m 0755 X INSTUIDFLAGS = -m 4755 X INSTLIBFLAGS = -m 0644 X INSTINCFLAGS = -m 0444 X INSTMANFLAGS = -m 0444 X INSTDATFLAGS = -m 0444 X INSTKMEMFLAGS = -m 4755 X X PROJECTROOT = /usr/X11R5 X X TOP_INCLUDES = -I$(INCROOT) X X CDEBUGFLAGS = -O X CCOPTIONS = -pipe X X ALLINCLUDES = $(INCLUDES) $(EXTRA_INCLUDES) $(TOP_INCLUDES) $(STD_INCLUDES) X ALLDEFINES = $(ALLINCLUDES) $(STD_DEFINES) $(EXTRA_DEFINES) $(PROTO_DEFINES) $(DEFINES) X CFLAGS = $(CDEBUGFLAGS) $(CCOPTIONS) $(ALLDEFINES) X LINTFLAGS = $(LINTOPTS) -DLINT $(ALLDEFINES) X X LDLIBS = $(SYS_LIBRARIES) $(EXTRA_LIBRARIES) X X LDOPTIONS = $(CDEBUGFLAGS) $(CCOPTIONS) $(LOCAL_LDFLAGS) -L$(USRLIBDIR) X X LDCOMBINEFLAGS = -X -r X DEPENDFLAGS = X X MACROFILE = sun.cf X RM_CMD = $(RM) *.CKP *.ln *.BAK *.bak *.o core errs ,* *~ *.a .emacs_* tags TAGS make.log MakeOut X X IMAKE_DEFINES = X X IRULESRC = $(CONFIGDIR) X IMAKE_CMD = $(IMAKE) -DUseInstalled -I$(IRULESRC) $(IMAKE_DEFINES) X X ICONFIGFILES = $(IRULESRC)/Imake.tmpl $(IRULESRC)/Imake.rules \ X $(IRULESRC)/Project.tmpl $(IRULESRC)/site.def \ X $(IRULESRC)/$(MACROFILE) $(EXTRA_ICONFIGFILES) X X# ------------------------------------------------------------------------- X# X Window System Build Parameters X# $XConsortium: Project.tmpl,v 1.138 91/09/10 09:02:12 rws Exp $ X X# ------------------------------------------------------------------------- X# X Window System make variables; this need to be coordinated with rules X X PATHSEP = / X USRLIBDIR = /usr/X11R5/lib X BINDIR = /usr/X11R5/bin X INCROOT = /usr/X11R5/include X BUILDINCROOT = $(TOP) X BUILDINCDIR = $(BUILDINCROOT)/X11 X BUILDINCTOP = .. X INCDIR = $(INCROOT)/X11 X ADMDIR = /usr/adm X LIBDIR = $(USRLIBDIR)/X11 X CONFIGDIR = $(LIBDIR)/config X LINTLIBDIR = $(USRLIBDIR)/lint X X FONTDIR = $(LIBDIR)/fonts X XINITDIR = $(LIBDIR)/xinit X XDMDIR = $(LIBDIR)/xdm X TWMDIR = $(LIBDIR)/twm X MANPATH = /usr/X11R5/man X MANSOURCEPATH = $(MANPATH)/man X MANSUFFIX = n X LIBMANSUFFIX = 3 X MANDIR = $(MANSOURCEPATH)$(MANSUFFIX) X LIBMANDIR = $(MANSOURCEPATH)$(LIBMANSUFFIX) X NLSDIR = $(LIBDIR)/nls X PEXAPIDIR = $(LIBDIR)/PEX X XAPPLOADDIR = $(LIBDIR)/app-defaults X FONTCFLAGS = -t X X INSTAPPFLAGS = $(INSTDATFLAGS) X X IMAKE = imake X DEPEND = makedepend X RGB = rgb X X FONTC = bdftopcf X X MKFONTDIR = mkfontdir X MKDIRHIER = /bin/sh $(BINDIR)/mkdirhier X X CONFIGSRC = $(TOP)/config X DOCUTILSRC = $(TOP)/doc/util X CLIENTSRC = $(TOP)/clients X DEMOSRC = $(TOP)/demos X LIBSRC = $(TOP)/lib X FONTSRC = $(TOP)/fonts X INCLUDESRC = $(TOP)/X11 X SERVERSRC = $(TOP)/server X UTILSRC = $(TOP)/util X SCRIPTSRC = $(UTILSRC)/scripts X EXAMPLESRC = $(TOP)/examples X CONTRIBSRC = $(TOP)/../contrib X DOCSRC = $(TOP)/doc X RGBSRC = $(TOP)/rgb X DEPENDSRC = $(UTILSRC)/makedepend X IMAKESRC = $(CONFIGSRC) X XAUTHSRC = $(LIBSRC)/Xau X XLIBSRC = $(LIBSRC)/X X XMUSRC = $(LIBSRC)/Xmu X TOOLKITSRC = $(LIBSRC)/Xt X AWIDGETSRC = $(LIBSRC)/Xaw X OLDXLIBSRC = $(LIBSRC)/oldX X XDMCPLIBSRC = $(LIBSRC)/Xdmcp X BDFTOSNFSRC = $(FONTSRC)/bdftosnf X BDFTOSNFSRC = $(FONTSRC)/clients/bdftosnf X BDFTOPCFSRC = $(FONTSRC)/clients/bdftopcf X MKFONTDIRSRC = $(FONTSRC)/clients/mkfontdir X FSLIBSRC = $(FONTSRC)/lib/fs X FONTSERVERSRC = $(FONTSRC)/server X EXTENSIONSRC = $(TOP)/extensions X XILIBSRC = $(EXTENSIONSRC)/lib/xinput X PHIGSLIBSRC = $(EXTENSIONSRC)/lib/PEX X X# $XConsortium: sunLib.tmpl,v 1.11 91/07/31 11:32:08 rws Exp $ X XSHLIBLDFLAGS = -assert pure-text XPICFLAGS = -pic X X DEPEXTENSIONLIB = X EXTENSIONLIB = -lXext X X DEPXLIB = $(DEPEXTENSIONLIB) X XLIB = $(EXTENSIONLIB) -lX11 X X DEPXMULIB = $(USRLIBDIR)/libXmu.sa.$(SOXMUREV) X XMULIB = -lXmu X X DEPOLDXLIB = X OLDXLIB = -loldX X X DEPXTOOLLIB = $(USRLIBDIR)/libXt.sa.$(SOXTREV) X XTOOLLIB = -lXt X X DEPXAWLIB = $(USRLIBDIR)/libXaw.sa.$(SOXAWREV) X XAWLIB = -lXaw X X DEPXILIB = X XILIB = -lXi X X SOXLIBREV = 4.10 X SOXTREV = 4.10 X SOXAWREV = 5.0 X SOOLDXREV = 4.10 X SOXMUREV = 4.10 X SOXEXTREV = 4.10 X SOXINPUTREV = 4.10 X X DEPXAUTHLIB = $(USRLIBDIR)/libXau.a X XAUTHLIB = -lXau X DEPXDMCPLIB = $(USRLIBDIR)/libXdmcp.a X XDMCPLIB = -lXdmcp X X DEPPHIGSLIB = $(USRLIBDIR)/libphigs.a X PHIGSLIB = -lphigs X X DEPXBSDLIB = $(USRLIBDIR)/libXbsd.a X XBSDLIB = -lXbsd X X LINTEXTENSIONLIB = $(LINTLIBDIR)/llib-lXext.ln X LINTXLIB = $(LINTLIBDIR)/llib-lX11.ln X LINTXMU = $(LINTLIBDIR)/llib-lXmu.ln X LINTXTOOL = $(LINTLIBDIR)/llib-lXt.ln X LINTXAW = $(LINTLIBDIR)/llib-lXaw.ln X LINTXI = $(LINTLIBDIR)/llib-lXi.ln X LINTPHIGS = $(LINTLIBDIR)/llib-lphigs.ln X X DEPLIBS = $(DEPXAWLIB) $(DEPXMULIB) $(DEPXTOOLLIB) $(DEPXLIB) X X DEPLIBS1 = $(DEPLIBS) X DEPLIBS2 = $(DEPLIBS) X DEPLIBS3 = $(DEPLIBS) X X# ------------------------------------------------------------------------- X# Imake rules for building libraries, programs, scripts, and data files X# rules: $XConsortium: Imake.rules,v 1.123 91/09/16 20:12:16 rws Exp $ X X# ------------------------------------------------------------------------- X# start of Imakefile X X# simple Imakefile for xasteroids XSRCS = ast.c XOBJS = ast.o X XEXTRA_LIBRARIES = -lX11 -lm X X OBJS = ast.o X SRCS = ast.c X X PROGRAM = ast X Xall:: ast X Xast: $(OBJS) $(DEPLIBS) X $(RM) $@ X $(CC) -o $@ $(OBJS) $(LDOPTIONS) $(LOCAL_LIBRARIES) $(LDLIBS) $(EXTRA_LOAD_FLAGS) X Xsaber_ast:: $(SRCS) X # load $(ALLDEFINES) $(SRCS) $(LOCAL_LIBRARIES) $(SYS_LIBRARIES) $(EXTRA_LIBRARIES) X Xosaber_ast:: $(OBJS) X # load $(ALLDEFINES) $(OBJS) $(LOCAL_LIBRARIES) $(SYS_LIBRARIES) $(EXTRA_LIBRARIES) X Xinstall:: ast X @if [ -d $(DESTDIR)$(BINDIR) ]; then set +x; \ X else (set -x; $(MKDIRHIER) $(DESTDIR)$(BINDIR)); fi X $(INSTALL) -c $(INSTPGMFLAGS) ast $(DESTDIR)$(BINDIR) X Xinstall.man:: ast.man X @if [ -d $(DESTDIR)$(MANDIR) ]; then set +x; \ X else (set -x; $(MKDIRHIER) $(DESTDIR)$(MANDIR)); fi X $(INSTALL) -c $(INSTMANFLAGS) ast.man $(DESTDIR)$(MANDIR)/ast.$(MANSUFFIX) X Xdepend:: X $(DEPEND) $(DEPENDFLAGS) -s "# DO NOT DELETE" -- $(ALLDEFINES) -- $(SRCS) X Xlint: X $(LINT) $(LINTFLAGS) $(SRCS) $(LINTLIBS) Xlint1: X $(LINT) $(LINTFLAGS) $(FILE) $(LINTLIBS) X Xclean:: X $(RM) $(PROGRAM) X X# ------------------------------------------------------------------------- X# common rules for all Makefiles - do not edit X Xemptyrule:: X Xclean:: X $(RM_CMD) "#"* X XMakefile:: X -@if [ -f Makefile ]; then set -x; \ X $(RM) Makefile.bak; $(MV) Makefile Makefile.bak; \ X else exit 0; fi X $(IMAKE_CMD) -DTOPDIR=$(TOP) -DCURDIR=$(CURRENT_DIR) X Xtags:: X $(TAGS) -w *.[ch] X $(TAGS) -xw *.[ch] > TAGS X Xsaber: X # load $(ALLDEFINES) $(SRCS) X Xosaber: X # load $(ALLDEFINES) $(OBJS) X X# ------------------------------------------------------------------------- X# empty rules for directories that do not have SUBDIRS - do not edit X Xinstall:: X @echo "install in $(CURRENT_DIR) done" X Xinstall.man:: X @echo "install.man in $(CURRENT_DIR) done" X XMakefiles:: X Xincludes:: X X# ------------------------------------------------------------------------- X# dependencies generated by makedepend X END_OF_FILE if test 10307 -ne `wc -c <'Makefile.std'`; then echo shar: \"'Makefile.std'\" unpacked with wrong size! fi # end of 'Makefile.std' fi if test -f 'ast.c' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'ast.c'\" else echo shar: Extracting \"'ast.c'\" $27201 characters$ sed "s/^X//" >'ast.c' <<'END_OF_FILE' X/* Xasteroids X Copyright 1990 by Phil Goetz X goetz@cs.buffalo.EDU X Version 4, 2/19/92 X X Changes from version 3.1: X X Better collision detection: Actually checks for intersection X of line segments if non-round objects are very close. X Explosions! (Thanks to Peter Phillips.) X Fine rotation repeating detected using KeyRelease. X Thrust indicator behind ship. (Thanks to Peter Phillips.) X Doesn't place ship in center of screen for new levels. X (Thanks to Peter Phillips.) X Seeds random-number generator with time. X (Thanks to Craig Smith.) X Shields! (Thanks to Peter Phillips. I rewrote the bounce code X & added the energy bar & other refinements.) X Detects failure of XOpenDisplay. (Thanks to Pat Ryan.) X X Contributors: Peter Phillips <pphillip@cs.ubc.ca> X Pat Ryan <pat@jaameri.gsfc.nasa.gov> X Craig Smith <csmith@cscs.UUCP> X*/ X#include <stdio.h> /* For NULL */ X#include <X11/Xlib.h> X#include <X11/Xutil.h> X#include <X11/cursorfont.h> /* For erasing cursor - not important */ X#include <math.h> X X/* Indexes for 1st dimension of obj */ X/* The order they are in is important */ X#define AST 0 X#define ENEMY 96 X#define ENEMYBUL 97 X#define FBUL 98 X#define LASTBUL 102 X#define SHIP 103 X#define LASTOBJ 103 /* Must be ship! See makeasts(). */ X X/* Shapes */ X/* Order is important! See collide(). */ X#define ASTSHAPE1 0 X#define ASTSHAPE2 1 X#define ASTSHAPE3 2 X#define ENBULSH 3 X#define BULSHAPE 4 X#define SHIPSHAPE 5 X#define SHIPTHRSHAPE 6 X#define ENEMYSHAPE 7 X#define LASTSHAPE 7 X X/* Masses */ X#define M_BIG 8.0 X#define M_MED 4.0 X#define M_SMALL 1.0 X#define M_SHIP 1.5 X#define M_ENEMY 1.0 X#define M_BULLET 0.1 X X/* Keys */ X#define FIRE 'p' X#define PAUSE 27 /* escape */ X#define SHIELD '`' X#define THRUST 'o' X X#define BMAX 300 /* Max particles in a "boom" + 1 */ X#define letheight 20 /* height of font */ X#define pi 3.1415926535897932384 X#define SHIPSIZE 28 X Xtypedef struct _Boom *Boom; Xstruct _Boom {Boom next; int dur, part; double bcoord[BMAX][2], bvec[BMAX][2]}; Xtypedef struct {int shape, alive, time; X double mass, x, y, xvel, yvel, rot, rotvel} Objtype; Xtypedef struct {double angle; int length} PolarPair; Xtypedef struct {double x, y, mag} Vector; X X/* Global variables: */ XObjtype obj[SHIP+1]; X/* In shapes pairs, 1st # is radians, 2nd is length in pixels. X Degrees: 0 ->, pi/2 down, pi <-, 3*pi/2 up X IF YOU CHANGE THE SHAPES, you MUST change numpairs & shapesize X*/ XPolarPair shapes[LASTSHAPE+1][11] = X { {{0,0}, {3*pi/2,40}, {0,20}, {pi/4,28}, {pi/2,40}, /* just crossed 0-deg line */ X {3*pi/4,28},{pi,40},{5*pi/4,28},{3*pi/2,40},{7*pi/4,28},{0,20}}, X/* hexagon if you prefer X {{0,0}, {3*pi/2, 20}, {pi/6, 20}, {pi/2, 20}, X {5*pi/6, 20}, {7*pi/6, 20}, {3*pi/2, 20}, {11*pi/6, 20}}, X*/ X {{0,0}, {3*pi/2,20}, {0,10}, {pi/4,14}, {pi/2,20}, X {3*pi/4,14},{pi,20},{5*pi/4,14},{3*pi/2,20},{7*pi/4,14},{0,10}}, X {{0,0}, {3*pi/2,10}, {0,5}, {pi/4,7}, {pi/2,10}, X {3*pi/4,7},{pi,10},{5*pi/4,7},{3*pi/2,10},{7*pi/4,7},{0,5}}, X {{0,0}, {7*pi/4, 4}, {pi/4, 4}, {3*pi/4, 4}, {5*pi/4, 4}}, X {{0,0}, {0,10}}, X {{0,0}, {5*pi/4,28}, {0,20}, {pi/4,28},{3*pi/4,28},{pi,20},{7*pi/4,28}}, /* Ship */ X {{0,0}, {5*pi/4,28}, {0,20}, {pi/4,28},{3*pi/4,28},{pi,20}, X {7*pi/4,28}, {3*pi/4, 7}, {9*pi/8, 13}, {15*pi/8, 13}}, /* Thrusting ship */ X {{0,0}, {pi,20},{7*pi/4,28},{pi/4,28},{pi,20}} X }; XBoom blist = NULL; Xdouble drawscale = 1, speedscale = 1; Xint width, height, X energy, /* # of turns shield is good for */ X highscore = 0, X nextbul = FBUL, /* Obj# of next bullet fired */ X numasts, oldscore = 99, X rndint = 73, ships, score, X numpairs[LASTSHAPE+1] = {11, 11, 11, 5, 2, 7, 10, 5}, X shapesize[LASTSHAPE+1] = {44, 21, 10, 2, 1, SHIPSIZE+1, 35, 20}, X shield_on; X Xinitasts() X{ int i; X extern Objtype obj[SHIP+1]; X X for (i = 0; i < LASTOBJ+1; i++) X { obj[i].rot = 0; X obj[i].rotvel = 0; X } X for (i = 0; i < ENEMY; i++) X { obj[i].shape = ASTSHAPE1; X } X obj[SHIP].shape = SHIPSHAPE; X obj[SHIP].mass = M_SHIP; X obj[ENEMY].shape = ENEMYSHAPE; X obj[ENEMY].mass = M_ENEMY; X obj[ENEMYBUL].shape = ENBULSH; X obj[ENEMYBUL].mass = M_BULLET; X for (i = FBUL; i < LASTBUL+1; i++) X { obj[i].shape = BULSHAPE; X obj[i].mass = M_BULLET; X} } X Xmakeasts(level) X{ int i; X extern Objtype obj[SHIP+1]; X extern int numasts, rndint; X extern double speedscale; X unsigned char a; X X for (i = 0; i < SHIP; i++) X obj[i].alive = 0; /* Erase objs from last level except ship */ X for (i = ENEMYBUL; i < LASTBUL+1; i++) X obj[i].time = 0; /* No bullets in the air */ X for (i = 0; i < level+4; i++) /* Asteroids: */ X { a = rand(rndint); a>>=1; /* a = rand# from 0 to 127 */ X if (a > 63) X obj[i].x = (double) a; X else obj[i].x = (double) (width - a); X a = rand(rndint); a>>=1; /* Now the same for y */ X if (a > 63) X obj[i].y = (double) a; X else obj[i].y = (double) height - a; X a = rand(rndint); a = 4 - a>>5; X obj[i].rot = (double) a; X a = rand(rndint); X obj[i].rotvel = ((double) a)/2048; X a = rand(rndint); X obj[i].xvel = cos((double) a); X obj[i].yvel = sin((double) a); X obj[i].shape = ASTSHAPE1; X obj[i].mass = M_BIG; X obj[i].alive = 1; X } X numasts = i; X} X Xmakeenemy(level) /* Start an enemy ship */ X int level; X{ extern Objtype obj[SHIP+1]; X extern int height, rndint; X unsigned char c; X X obj[ENEMY].alive = 1; X obj[ENEMY].x = 0; X obj[ENEMY].y = (double) height/4; X c = rand(rndint); obj[ENEMY].y += (double) c; /* May put enemy outside window */ X obj[ENEMY].xvel = (double) level/2; X obj[ENEMY].yvel = 0; X} X Xint nextast() /* Find next unused asteroid object */ X{ extern Objtype obj[SHIP+1]; X int i; X for (i = 0; obj[i].alive; i++); /* guaranteed to find one */ X return i; X} X Xint collide(i, j) /* Returns non-zero if i collided with j */ X /* Ship must be j! (See below) */ X int i, j; X{ extern Objtype obj[SHIP+1]; X extern int shapesize[LASTSHAPE+1]; X extern double drawscale; X double mi, mj, /* Slopes of lines */ X ix1, ix2, iy1, iy2, jx1, jx2, jy1, jy2, /* Endpoints */ X roti, rotj, X xcross, ycross, /* coord of intersection */ X z; X int diff, xd, yd, X a, b, X shapei, shapej; X xd = obj[i].x - obj[j].x; X yd = obj[i].y - obj[j].y; X diff = sqrt((double)(xd*xd + yd*yd)); X shapei = obj[i].shape; shapej = obj[j].shape; X /* Note this will miss if drawscale is < 0 */ X if (diff < (shapesize[shapei] + shapesize[shapej])*drawscale) X { /* If both are round objects, approximation is good */ X if (shapei < SHIPSHAPE && shapej < SHIPSHAPE) return 1; X if (j == SHIP && shield_on) return 1; /* Ship always j! */ X roti = obj[i].rot; rotj = obj[j].rot; X ix1 = (double) obj[i].x; iy1 = (double) obj[i].y; X for (a = 1; a < numpairs[shapei]; a++) X { ix2 = ix1 + (double) shapes[shapei][a].length * drawscale * X cos(shapes[shapei][a].angle + roti); X iy2 = iy1 + (double) shapes[shapei][a].length * drawscale * X sin(shapes[shapei][a].angle + roti); X if (ix1 == ix2) X { printf("\nif1 = if2"); return 1;} /* Easy way out */ X mi = (iy2-iy1)/(ix2-ix1); X z = mi*ix1; X jx1 = (double) obj[j].x; jy1 = (double) obj[j].y; X for (b = 1; b < numpairs[shapej]; b++) X { jx2 = jx1 + (double) shapes[shapej][b].length * X drawscale * cos(shapes[shapej][b].angle + rotj); X jy2 = jy1 + (double) shapes[shapej][b].length * X drawscale * sin(shapes[shapej][b].angle + rotj); X if (jx1 == jx2) X { ycross = ix1 + (jx1-ix1)*mi; X if ((jx1-ix1) * (ix2-jx1) >= 0 && X (ycross-jy1)*(jy2-ycross) >= 0) X return 1; X } X mj = (jy2-jy1)/(jx2-jx1); X if (mj == mi) continue; /* Parallel lines */ X xcross = (iy1 - jy1 + mj*jx1 - z) / (mj - mi); X if ((xcross-ix1) * (ix2-xcross) > 0 X && (xcross-jx1) * (jx2-xcross) > 0) return 1; X jx1 = jx2; jy1 = jy2; X } X ix1 = ix2; iy1 = iy2; X } } X return 0; X} X Xblastpair(i, j) /* Generate random velocity vector v. */ X int i, j ; /* Add v to i, -v to j. */ X{ extern int rndint; X extern Objtype obj[SHIP+1]; X unsigned char c; /* for rand */ X double vx, vy; X c = rand(rndint); X/* c = 4 - c>>5; if you need angles from -3 to 4 */ X c>>2; /* possibly save some time on sin/cos */ X vx = cos((double) c); vy = sin((double) c); X obj[i].xvel = obj[i].xvel + vx; X obj[i].yvel = obj[i].yvel + vy; X obj[j].xvel = obj[j].xvel - vx; X obj[j].yvel = obj[j].yvel - vy; X obj[i].rotvel = obj[i].rotvel + .05; X obj[j].rotvel = obj[j].rotvel - .05; X} X X/* dot product of 2 vectors */ X#define dot(i,j) (i.x*j.x + i.y*j.y) X/* rotational inertia (constant eliminated) of obj. i */ X#define rotinert(i) (double) (obj[i].mass*shapesize[obj[i].shape]*shapesize[obj[i].shape]) X X/* cause two objects to collide elastically */ Xbounce(i, j) Xint i,j; X{ Xdouble rotrat, temp; Xextern Objtype obj[SHIP+1]; XVector vi, vj, /* velocity of objs i, j */ X ij, /* vector from center of i to center of j */ X vi_ij, vj_ij, /* velocity of obj along vector ij */ X vipij, vjpij, /* velocity perpendicular to ij */ X vi_ijf, vj_ijf; /* post-collision velocity along ij */ X Xvi.x = obj[i].xvel; vi.y = obj[i].yvel; Xvj.x = obj[j].xvel; vj.y = obj[j].yvel; Xij.x = obj[j].x - obj[i].x; ij.y = obj[j].y - obj[i].y; Xij.mag = sqrt(ij.x*ij.x + ij.y*ij.y); X/* XCalculate velocities projected onto ij; X vi_ij = vi*cos(a) = (vi dot ij) / |ij| */ Xvi_ij.mag = dot(vi, ij) / ij.mag; Xvi_ij.x = (ij.x * vi_ij.mag) / ij.mag; Xvi_ij.y = (ij.y * vi_ij.mag) / ij.mag; Xvj_ij.mag = dot(vj, ij) / ij.mag; Xvj_ij.x = (ij.x * vj_ij.mag) / ij.mag; Xvj_ij.y = (ij.y * vj_ij.mag) / ij.mag; Xif (vi_ij.mag - vj_ij.mag < 0) /* Objs moving away from each other - X Since objs are round (at least when bouncing), this means X they are moving away from each other already. */ X return; X/* XCalculate component of velocities perpendicular to ij: X |vipij| = |vi|*sin(a) = |vi x ij| / |ij| XSame as X |vipij| = |vi|*cos(pi/2 - a) = (vi dot (perp. to ij)) / |ij| */ Xtemp = vi.y*ij.x - vi.x*ij.y; /* - (cross product when 3rd coord is 0)*/ Xtemp /= (ij.mag*ij.mag); Xvipij.x = -ij.y*temp; vipij.y = ij.x*temp; Xtemp = (vj.x*ij.y - vj.y*ij.x) / (ij.mag*ij.mag); Xvjpij.x = -ij.y*temp; vjpij.y = ij.x*temp; X/* XCalculate the linear elastic collision along ij: X mass(i)*vi_ij + mass(j)*vj_ij = mass(i)*vi_ijf + mass(j)*vj_ijf X vi_ij + vi_ijf = vj_ij + vj_ijf (derived by dividing equation X for conservation of kinetic energy by eq. for cons. of momentum) */ Xtemp = obj[i].mass/obj[j].mass; Xvj_ijf.x = (temp * (2*vi_ij.x - vj_ij.x) + vj_ij.x) / (1 + temp); Xvj_ijf.y = (temp * (2*vi_ij.y - vj_ij.y) + vj_ij.y) / (1 + temp); Xvi_ijf.x = vj_ijf.x + vj_ij.x - vi_ij.x; Xvi_ijf.y = vj_ijf.y + vj_ij.y - vi_ij.y; X/* XNow, given vi_ijf and vj_ijf, add them to the perpendicular X components to get final velocity vectors */ Xobj[i].xvel = vi_ijf.x + vipij.x; Xobj[i].yvel = vi_ijf.y + vipij.y; Xobj[j].xvel = vj_ijf.x + vjpij.x; Xobj[j].yvel = vj_ijf.y + vjpij.y; X/* XNow calculate rotational velocity exchange */ Xrotrat = rotinert(i)/rotinert(j); Xtemp = rotrat * (2*obj[i].rotvel - obj[j].rotvel) / (1+rotrat); Xobj[i].rotvel = temp + obj[j].rotvel - obj[i].rotvel; Xobj[j].rotvel = temp; X} X Xbotline(disp, window, gc) /* Print status line text */ X Display *disp; X Drawable window; X GC gc; X{ extern int highscore, ships, score; X char text[70]; X sprintf(text, "Ships:%2d Score:%6d Shield: High:%6d", X ships, score, highscore); X XDrawImageString (disp, window, gc, 0, height+letheight, X text, strlen(text)); X} X Xprintss(disp, window, gc) /* Print ships and score */ X Display *disp; X Drawable window; X GC gc; X{ extern int height, highscore, oldscore, ships, score; X extern Objtype obj[SHIP+1]; /* to kill ship */ X char sstring[30]; X X if (score != oldscore) X { if (score/10000 > oldscore/10000) X { ships++; botline(disp, window, gc);} X if (score/10000 < oldscore/10000) X { ships--; botline(disp, window, gc); X if (!ships) obj[SHIP].alive = 0; X } X if (score > highscore) /* Separate if to avoid flashing */ X { highscore = score; X sprintf(sstring, "%6d", highscore); X XDrawImageString (disp, window, gc, 460, X height+letheight, sstring, strlen(sstring)); X } X sprintf(sstring, "%6d", score); X XDrawImageString (disp, window, gc, 170, height+letheight, X sstring, strlen(sstring)); X oldscore = score; X } X X /* Draw shield energy bar */ X XFillRectangle(disp, window, gc, 340, height+8, energy>>1, 10); X XClearArea(disp, window, 340+(energy>>1), height+8, 8, 10, False); X} X Xupscore(killer, up) /* Only award score for things the player shot */ X int killer, up; X{ extern int score; X if (killer != ENEMYBUL && killer != SHIP) X score = score + up; X} X X/* boom, movebooms, drawbooms all by Peter Phillips */ Xboom(ob, particles, duration) Xint ob; Xint particles; Xint duration; X{ extern int rndint; X int i; X unsigned int r1, r2; X Boom b; X double x, y; X double angle, length; X X b = (Boom) malloc(sizeof(struct _Boom)); X b->dur = duration; X b->part = particles; X x = obj[ob].x; X y = obj[ob].y; X for (i = 0; i < particles; i++) { X r1 = (rand(rndint) >> 2) % 100; X r2 = (rand(rndint) >> 2) % 7; X X b->bcoord[i][0] = x; X b->bcoord[i][1] = y; X angle = r1 * pi / 50.0; X length = 3 + r2; X b->bvec[i][0] = cos(angle) * length + obj[ob].xvel; X b->bvec[i][1] = sin(angle) * length + obj[ob].yvel; X } X b->next = blist; X blist = b; X} X X/* move the various booms that are active */ Xmovebooms() X{ X int i; X Boom b, prevb; X X prevb = NULL; X b = blist; X while (b != NULL) { X b->dur--; X if (b->dur < 0) { /* delete this boom */ X Boom temp; X X temp = b; X if (prevb == NULL) { X blist = b->next; X } else { X prevb->next = b->next; X } X b = b->next; X free(temp); X } else { /* move boom, advance list */ X for (i = 0; i < b->part; i++) { X b->bcoord[i][0] += b->bvec[i][0]; X b->bcoord[i][1] += b->bvec[i][1]; X } X prevb = b; X b = b->next; X } X } X} X X/* Draw the various booms */ Xdrawbooms(disp, window, gc) X Display *disp; X Drawable window; X GC gc; X{ X int i; X Boom b; X XPoint figure[BMAX]; X X b = blist; X while (b != NULL) { X for (i = 0; i < b->part; i++) { X figure[i].x = (int) b->bcoord[i][0]; X figure[i].y = (int) b->bcoord[i][1]; X } X XDrawPoints(disp, window, gc, figure, b->part, CoordModeOrigin); X b = b->next; X } X} X Xdeletebooms() /* delete all booms */ X{ Boom b; X X b = blist; X while (b != NULL) X { b->dur = 0; X b = b->next; X} } X Xkillast(killer, i) X int killer, i; /* i = Asteroid # to kill */ X{ extern Objtype obj[SHIP+1]; X extern int numasts; X int k, na, oldna; X X if (obj[i].shape == ASTSHAPE1) X { na = nextast(); /* Could put 6 lines in a sub */ X obj[na].x = obj[i].x; X obj[na].y = obj[i].y; X obj[na].xvel = obj[i].xvel; X obj[na].yvel = obj[i].yvel; X obj[na].alive++; X obj[na].shape = ASTSHAPE2; X obj[na].mass = M_MED; X obj[i].shape = ASTSHAPE2; X obj[i].mass = M_MED; X blastpair(i, na); X boom(i, 30, 12); X numasts = numasts + 1; X upscore(killer, 25); X } X else if (obj[i].shape == ASTSHAPE2) X { X for (k = 0; k < 3; k++) X { oldna = na; X na = nextast(); X obj[na].x = obj[i].x; X obj[na].y = obj[i].y; X obj[na].xvel = obj[i].xvel; X obj[na].yvel = obj[i].yvel; X obj[na].alive++; X obj[na].shape = ASTSHAPE3; X obj[na].mass = M_SMALL; X if (k == 1) blastpair(oldna,na); X } X obj[i].shape = ASTSHAPE3; X obj[i].mass = M_SMALL; X blastpair(na, i); X boom(i, 20, 10); X numasts = numasts + 3; X upscore(killer, 50); X } X else if (obj[i].shape == ASTSHAPE3) X { boom(i, 10, 8); X obj[i].alive = 0; numasts--; upscore(killer, 100);} X else /* enemy {ship or bullet} */ X { boom(i, 9, 7); X obj[i].alive = 0; upscore(killer, 500);} X} Xmoveobjs(crash) X int *crash; X{ extern Objtype obj[SHIP+1]; X extern int ships; X extern double speedscale; X int i, j; /* Indexes */ X double *temp; X X movebooms(); X for (i = 0; i < LASTOBJ+1; i++) X if (obj[i].alive) X { temp = &obj[i].x; X *temp = *temp + obj[i].xvel*speedscale; X while (*temp < 0) *temp = *temp + (double) width; X while (*temp > width) *temp = *temp - (double) width; X temp = &obj[i].y; X *temp = *temp + obj[i].yvel*speedscale; X while (*temp < 0) *temp = *temp + height; X while (*temp > height) *temp = *temp - height; X obj[i].rot = obj[i].rot + obj[i].rotvel; X } X for (i = 0; i < FBUL; i++) X if (obj[i].alive) X { X if (obj[SHIP].alive && collide(i, SHIP)) X { if (shield_on) bounce(SHIP, i); X else X { *crash = 2; X ships--; obj[SHIP].alive = 0; X killast(SHIP, i); X } } X for (j = ENEMYBUL; j < LASTBUL+1; j++) X if (obj[j].alive && collide(i, j) && (j != ENEMYBUL || (i != ENEMYBUL && i != ENEMY))) X { obj[j].alive = 0; /* Kill the bullet */ X killast(j,i); X } X } X} X Xfire() X{ extern Objtype obj[SHIP+1]; X extern int width, nextbul; X extern double drawscale, speedscale; X double *shiprot, cosrot, sinrot; X X obj[nextbul].alive++; X shiprot = &obj[SHIP].rot; X cosrot = cos(*shiprot); sinrot = sin(*shiprot); X obj[nextbul].x = obj[SHIP].x + 20 * cosrot * drawscale; X obj[nextbul].y = obj[SHIP].y + 20 * sinrot * drawscale; X obj[nextbul].xvel = obj[SHIP].xvel + 10 * cosrot; X obj[nextbul].yvel = obj[SHIP].yvel + 10 * sinrot; X obj[nextbul].rot = *shiprot; X obj[nextbul].time = width/(speedscale*11); /* loops before bullet expires */ X nextbul++; if (nextbul == LASTBUL+1) nextbul = FBUL; X} X Xhyper() X{ extern Objtype obj[SHIP+1]; X extern int width, height, rndint; X unsigned char c; X unsigned int i; X X c = rand(rndint); i = c; i<<=2; /* 0 - 1024 */ X while (i > width) i -= width; X obj[SHIP].x = (double) i; X c = rand(rndint); i = c; i<<=2; /* 0 - 1024 */ X while (i > height) i -= height; X obj[SHIP].y = (double) i; X} X Xvdraw(disp, window, gc, shape, x, y, rot) X Display *disp; X Drawable window; X GC gc; X int shape; X double x, y, rot; X X{ int line; X extern PolarPair shapes[LASTSHAPE+1][11]; X extern int numpairs[LASTSHAPE+1]; X extern double drawscale; X XPoint figure[20]; X figure[0].x = (int) x; figure[0].y = (int) y; X for (line=1; line < numpairs[shape]; line++) /* 2 pairs = 1 line */ X { figure[line].x = (int) shapes[shape][line].length * X cos(shapes[shape][line].angle + rot) * drawscale; X figure[line].y = (int) shapes[shape][line].length * X sin(shapes[shape][line].angle + rot) * drawscale; X } X XDrawLines (disp, window, gc, figure, numpairs[shape], CoordModePrevious); X} X Xmain(argc, argv) X int argc; X char **argv; X{ Colormap cmap; X Cursor cursor; X Display *disp; X Font font; X GC gc, pmgc; X KeySym key; X Pixmap pixmap; X Window window; X XColor black, exact; X XEvent event; X XSizeHints hint; X extern int width, height; X int screen, depth; X char text[30]; X unsigned long fg, bg; X X extern double drawscale, speedscale; X extern int numasts, rndint, ships, score, oldscore; X extern Objtype obj[SHIP+1]; X unsigned char c; /* for rand */ X double *temp, dx, dy, dist; X int level, crashed, flashon, len, pause = 0, delay = 64, X enemycount, undraw = 0, counter, counterstart = 1, X i, /* index for drawing objs, counting bullets */ X r; /* radius of shield circle */ X X disp = XOpenDisplay(0); X if (disp == (Display *) NULL) X { fprintf(stderr, "Could not open display\n"); X exit(1); X } X screen = DefaultScreen(disp); X bg = BlackPixel(disp, screen); X fg = WhitePixel(disp, screen); X hint.x = 150; hint.y = 200; hint.width = 550; hint.height = 550; X hint.flags = PPosition | PSize; X width = hint.width; height = hint.height-letheight-1; X depth = DefaultDepth (disp, screen); X window = XCreateSimpleWindow (disp, DefaultRootWindow(disp), X hint.x, hint.y, hint.width, hint.height, 5, fg, bg); X pixmap = XCreatePixmap (disp, window, width, height, depth); X XSetStandardProperties (disp, window, "asteroids", "asteroids", None, X argv, argc, &hint); X gc = XCreateGC (disp, window, 0, 0); X XSetGraphicsExposures(disp, gc, 0); /* IMPORTANT! If you do not X specifically ask not to get Expose events, every XCopyArea X will generate one, & the event queue will fill up. */ X font = XLoadFont(disp, "10x20\0"); /* If you don't have this X font, try replacing it with 9x15\0 */ X XSetFont(disp, gc, font); X pmgc = XCreateGC (disp, window, 0, 0); X XSetBackground (disp, gc, bg); X XSetForeground (disp, gc, fg); X XSetForeground (disp, pmgc, bg); /* fg of pixmap is bg of window */ X XSelectInput (disp, window, X KeyPressMask | KeyReleaseMask | StructureNotifyMask); X XMapRaised (disp, window); X X /* Erase cursor. Just delete next 5 lines if any error. */ X cmap = XDefaultColormap(disp, screen); X XAllocNamedColor(disp, cmap, "Black", &exact, &black); X cursor = XCreateFontCursor(disp, XC_dot); X XRecolorCursor(disp, cursor, &black, &black); X XDefineCursor(disp, window, cursor); X X XFillRectangle (disp, pixmap, pmgc, 0, 0, width, height); X/* Can delete next line if it causes trouble */ X srand((unsigned) time(0)); /* By Craig Smith */ X initasts(); XNewgame: X deletebooms(); X ships = 3; X score = 0; oldscore = -1; X for (level = 0; ;) X { if (level < 8) level++; X makeasts (level); XNewship: botline(disp, window, gc); X if (!obj[SHIP].alive) X { obj[SHIP].x = width/2; X obj[SHIP].y = height/2; X obj[SHIP].xvel = 0; X obj[SHIP].yvel = 0; X obj[SHIP].rot = 3*pi/2; X obj[SHIP].rotvel = 0; X energy = 80; X shield_on = 0; X } X obj[SHIP].alive = (ships > 0); X crashed = 0; flashon = 0; enemycount = 20; X counter = 0; X while (numasts) X { for (i = FBUL; i < LASTBUL+1; i++) /* Bullet timer */ X if (obj[i].alive) X { obj[i].time--; X if (!obj[i].time) obj[i].alive = 0; /* Not --! */ X } X while (XEventsQueued(disp, QueuedAfterReading)) X { XNextEvent(disp, &event); X switch (event.type) X { case MappingNotify: X XRefreshKeyboardMapping (&event); X break; X case ConfigureNotify: X width = event.xconfigure.width; X height = event.xconfigure.height-letheight-1; X XFreePixmap (disp, pixmap); X pixmap = XCreatePixmap (disp, window, width, height, depth); X XFillRectangle (disp, pixmap, pmgc, 0, 0, width, height); X botline(disp, window, gc); X break; X case KeyPress: X len = XLookupString (&event, text, 10, &key, 0); X if (len == 1 && !shield_on) switch (text[0]) X { case 'e': X obj[SHIP].rotvel = obj[SHIP].rotvel - .1; break; X case 'r': X obj[SHIP].rotvel = obj[SHIP].rotvel + .1; break; X case 'w': X obj[SHIP].rot -= pi/4; break; X case 't': X obj[SHIP].rot += pi/4; break; X case 'd': X obj[SHIP].rotvel = obj[SHIP].rotvel - .02; break; X case 'f': X obj[SHIP].rotvel = obj[SHIP].rotvel + .02; break; X case THRUST: X obj[SHIP].xvel += cos(obj[SHIP].rot); X obj[SHIP].yvel += sin(obj[SHIP].rot); X obj[SHIP].shape = SHIPTHRSHAPE; X break; X case FIRE: X if (obj[SHIP].alive) fire(); break; X case ' ': X if (obj[SHIP].alive) X { hyper(); flashon = 1; X/* NOT XSetForeground (disp, gc, bg); X If you set the fg black, & print the highscore, it will effectively erase it. */ X XSetForeground (disp, pmgc, fg); X XFillRectangle (disp, pixmap, pmgc, 0, 0, width, height); X } X break; X case SHIELD: X if (energy) X { shield_on = 1; X obj[SHIP].shape = SHIPSHAPE;} X break; X case '.': /* decrease delay */ X if (delay > 1) delay >>=1; break; X case ',': /* increase delay */ X delay <<=1; break; X case 'm': /* decrease drawscale - may go negative */ X drawscale -= .1; break; X case 'n': /* increase drawscale */ X drawscale += .1; break; X case '2': /* increase speedscale */ X speedscale += .1; break; X case '1': /* decrease speedscale */ X speedscale -= .1; break; X case 'b': /* increase moves/update */ X counterstart++; break; X case 'v': /* decrease moves/update */ X if (counterstart > 1) counterstart--; X break; X case 'u': /* undraw erase */ X undraw = 1; break; X case 'x': /* XFill erase */ X undraw = 0; break; X case PAUSE: /* pause */ X pause = 1 - pause; break; X case '+': /* cheat */ X ships++; botline(disp, window, gc); break; X case 'Q': /* quit */ X goto End; X case 's': /* start new ship */ X if (!obj[SHIP].alive) X if (ships < 1) goto Newgame; X else goto Newship; X break; X } X break; X case KeyRelease: X len = XLookupString(&event, text, 10, &key, 0); X if (len == 1) switch (text[0]) X { case 'e': X obj[SHIP].rotvel = 0; break; X case 'r': X obj[SHIP].rotvel = 0; break; X case THRUST: X obj[SHIP].shape = SHIPSHAPE; X break; X case SHIELD: X shield_on = 0; break; X } X/* break; */ X } } X if (!pause) X { moveobjs(&crashed); X if (ships) score--; /* timer effect */ X if (!counter) X { counter = counterstart; /* Restart counter */ X if (crashed == 2) X { crashed--; flashon++; X boom(SHIP, BMAX-1, 70); X XSetForeground (disp, pmgc, fg); X XFillRectangle (disp, pixmap, pmgc, 0, 0, width, height); X botline(disp, window, gc); X } X /* Write copyright notice */ X if (!ships && blist == NULL && !undraw) X { sprintf(text, "Xasteroids"); X XDrawImageString (disp, pixmap, gc, X width/2-50, height/2-2*letheight, X text, strlen(text)); X sprintf(text, "Copyright 1990 by Phil Goetz"); X XDrawImageString (disp, pixmap, gc, X width/2-140, height/2, X text, strlen(text)); X sprintf(text, "goetz@cs.buffalo.edu"); X XDrawImageString (disp, pixmap, gc, X width/2-100, height/2+2*letheight, X text, strlen(text)); X } X /* Draw objects */ X for (i = 0; i <= LASTOBJ; i++) X if (obj[i].alive) X vdraw(disp, pixmap, gc, obj[i].shape, X obj[i].x, obj[i].y, obj[i].rot); X if (shield_on && obj[SHIP].alive) X { r = abs((int) (drawscale*SHIPSIZE)); X XDrawArc(disp, pixmap, gc, X ((int) obj[SHIP].x) - r, X ((int) obj[SHIP].y) - r, X 2*r, 2*r, 0, 360*64); X energy--; X if (!energy) shield_on = 0; X } X drawbooms(disp, pixmap, gc); X /* update display: */ X XCopyArea(disp, pixmap, window, gc, 0, 0, width, height, 0, 0); X printss(disp, window, gc); X /* erase objects */ X if (undraw) X { for (i = 0; i <= LASTOBJ; i++) X if (obj[i].alive) X vdraw(disp, pixmap, pmgc, obj[i].shape, X obj[i].x, obj[i].y, obj[i].rot); X } X else X XFillRectangle (disp, pixmap, pmgc, 0, 0, width, height); X if (flashon) X { flashon--; X XSetForeground (disp, pmgc, bg); X XFillRectangle (disp, pixmap, pmgc, 0, 0, width, height); X } X XSync(disp, 0); X } X counter--; X c = rand(rndint)>>8; X if (!obj[ENEMY].alive) X { if (c < level) X { c = rand(rndint); X if (c < level * 10) makeenemy(level); X } } X else X obj[ENEMY].yvel += (c>128+6*obj[ENEMY].yvel) ? .5 : -.5; X enemycount--; if (!enemycount) X { enemycount = 100; X if (obj[ENEMY].alive) X { obj[ENEMYBUL].alive++; X obj[ENEMYBUL].x = obj[ENEMY].x; X obj[ENEMYBUL].y = obj[ENEMY].y; X dx = obj[SHIP].x - obj[ENEMY].x; X dy = obj[SHIP].y - obj[ENEMY].y; X dist = sqrt(dx*dx + dy*dy); X obj[ENEMYBUL].xvel = 3*dx/dist; X obj[ENEMYBUL].yvel = 3*dy/dist; X } X else obj[ENEMYBUL].alive = 0; X } X for (i = 0; i < delay; i++); X } X } X } XEnd: printf("\nYour high score was %d\n", highscore); X XFreeGC (disp, gc); X XFreeGC (disp, pmgc); X XFreePixmap (disp, pixmap); X XDestroyWindow (disp, window); X XCloseDisplay (disp); X exit(0); X} END_OF_FILE if test 27201 -ne `wc -c <'ast.c'`; then echo shar: \"'ast.c'\" unpacked with wrong size! fi # end of 'ast.c' fi if test -f 'ast.doc' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'ast.doc'\" else echo shar: Extracting \"'ast.doc'\" $1291 characters$ sed "s/^X//" >'ast.doc' <<'END_OF_FILE' X Xasteroids X Copyright 1990 by Phil Goetz X goetz@cs.Buffalo.EDU X XKeypress Command X-------- ------- X e Rotate counterclockwise ("left") X r Rotate clockwise ("right") X w Rotate 45 degrees counterclockwise X t Rotate 45 degrees clockwise X d Increase counterclockwise rotational velocity X f Increase clockwise rotational velocity X o Thrust X p Fire X ` Shields X space Hyperspace X s Start new ship in center of playing field X (Also used to start a new game) X esc Pause X Q Quit XSpeed commands: Key associated with faster speed is to the right of its X corresponding key associated with slower speed. X . Decrease delay: Speed game up X , Increase delay: Slow the game down X m Decrease size ("Minimize") X n Increase size X b Increase # of moves/frame X v Decrease # of moves/frame X 2 Increase scale of movement X 1 Decrease scale of movement X x Use XFillRectangle to erase screen X u Use undraw to erase screen X XObject Score X------- ----- XBig asteroid 25 XMedium asteroid 50 XLittle asteroid 100 XEnemy spaceship 500 XEnemy bullet 500 X XCommands can only be entered when the mouse pointer is in the Xasteroids window. X XResize the window with your window manager Xat any time for a different playing field. END_OF_FILE if test 1291 -ne `wc -c <'ast.doc'`; then echo shar: \"'ast.doc'\" unpacked with wrong size! fi # end of 'ast.doc' fi echo shar: End of archive 1 $of 1$. cp /dev/null ark1isdone MISSING="" for I in 1 ; do if test ! -f ark${I}isdone ; then MISSING="${MISSING} ${I}" fi done if test "${MISSING}" = "" ; then echo You have the archive. rm -f ark[1-9]isdone else echo You still need to unpack the following archives: echo " " ${MISSING} fi ## End of shell archive. exit 0