Coursework 2 support. modifications. modifications. you can either modify quake 1orquake 3for the coursework. I d advice modifying quake3.

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1 Coursework 2 support slide 1 Coursework Quake 1texture modifications slide 2 you can either modify quake 1orquake 3for the coursework. I d advice modifying quake3. you can download the quake 1engine and extract it from the command line using the following commands: if you want to run quake 1you will need to create the data files. This is best performed on the server, so: $ ssh mcgreg.comp.glam.ac.uk Password: yourpassword $ initbaseq1 $ exit $ wget $ tar zxf darkplaces gore.tar.gz from the command line or you could download the quake 3engine using these commands: $ wget $ tar zxf ioquake tar.gz note that the data sets are not included, see later on for how the data is introduced Coursework Quake 1texture modifications slide 3 Coursework Quake 1texture modifications slide 4 we will now download the improved textures for the darkplaces (quake 1)engine and extract them so we can edit them later again this is best done on the server, so open up a command line terminal and type: $ cd darkplaces $ make sdl-debug open up a command terminal and type the following: $ ssh mcgreg.comp.glam.ac.uk Password: secret $ cd $HOME/.darkplaces/id1 $ wget $ tar zxf textures.tar.gz $ exit these image files can be edited usinggimp or equivalent tools now weneed to build the darkplaces engine (quake 1) this must be done on the client not the server

2 Run the quake 1engine slide 5 slide 6 Modifying the Darkplaces game engine open up a terminal and type: $ cd darkplaces $./darkplaces-sdl extensive modifications have been made to the original Quake game engine - the result is darkplaces we will try and change engine in a trivial way: navigate to the file: Desktop/darkplaces /cl_particles.c and open it up in an editor slide 7 Modifying the Darkplaces game engine slide 8 Some previous modifications to original Quake (not darkplaces) move to line170 and here you will see some configuration values which control the particles in darkplaces enable some of boolean values by changing0 s to1 s and now bytrial and error try adjusting some of the values of particle variables see if you can introduce your owngore variable and make itincrease various particle effects, more blood, more smoke, greater length of time before bullet holes disappear etc feel free to modifydarkplaces in any other way these notes might be useful to gain a flavour of how to modifify quake note they do not directly apply to darkplaces

3 slide 9 slide 10 firstly add a console function: in the filer_main.c void R_Gore_f (void) { if (gore) { gore = false; Con_Printf("gore off\n"); else { gore = true; Con_Printf("gore on\n"); add new command to the filer_main.c inside the function:r_init Cmd_AddCommand ("gore", R_Gore_f); add a boolean variable (external declaration) to common.h extern qboolean gore; slide 11 slide 12 declare and initialise the variable insidecommon.c inside the function qboolean gore = false; void COM_InitArgv (int argc, char **argv) add a test for the presence of the command line option-gore... if (COM_CheckParm ("-gore")) { gore = true;...

4 Now for the fun... modify R_ParticleExplosion2 (not darkplaces) slide 13 Now for the fun... modify R_ParticleExplosion2 (not darkplaces) slide 14 void R_ParticleExplosion2 (vec3_t org, int colorstart, int { int i, j; particle_t *p; int colormod = 0; int multiplier=1; if (gore) multiplier = 2; for (i=0; i<512*multiplier; i++) { if (!free_particles) return; p=free_particles; free_particles = p->next; p->next = active_particles; active_particles = p; p->die = cl.time + 0.3; p->color = colorstart + (colormod % colorlength); colormod++;... p->type = pt_blob; for (j=0 ; j<3 ; j++) { p->org[j] = org[j] + ((rand()%32)-16); if (gore) p->vel[j] = (rand()%512)-256; else p->vel[j] = (rand()%1024)-512; Quake II slide 15 slide 16 Quake IItakes place in a science fiction environment in the single-player game, the player is a human soldier known only by his alias, Bitterman taking part in Operation Alien Overlord adesperate attempt to protect Earth from alien invasion by launching a counter-attack on the home planet of the hostile cybernetic Strogg civilisation most of the other soldiers are captured or killed almost as soon as they enter the planet s atmosphere, so it falls upon the player to penetrate the Strogg capital city alone and ultimately to assassinate the Strogg leader, the Makron further reading en.wikipedia.org/wiki/quake_ii unlike Quake, where hardware accelerated graphics controllers were supported only with later patches, Quake IIcame with OpenGL support out of the box the latest version is 3.21 contains numerous bug fixes and new maps designed for multiple players death-match Quake IIuses an improved client server network model introduced in Quake the game code of Quake II, which defines all the functionality for weapons, entities and game mechanics, can be changed in any way because id Software published the source code of their own implementation that shipped with the game

5 slide 17 slide 18 Quake IIuses the shared library functionality of the operating system to load the game library at run-time -this is how mod authors are able to alter the game and provide different gameplay mechanics, new weapons and much more originally just the shared library source code was released, eventually the code which loads the shared library game was released technically Quake IIisharder to modify than Quake as you have to beextremely careful where to add new variables are they declared in the shared library? or in the parent loader? or both? full source code to Quake IIversion 3.19 was released under the terms of the GPL on December 21, Version 3.21 followed later. since then several Third-party update projects to the game engine have been created the most prominent of these are projects focused on graphical enhancements to the game such as Quake2maX, EGL and Quake IIEvolved slide 19 slide 20 source release also revealed numerous critical security flaws which can result in remote compromise of both the Quake IIclient and server most 3rd party engines include fixes for these bugs in July, 2003, Vertigo Software released a port of Quake IIfor the Microsoft.NET platform, using Managed C++ it became a poster application for the language, showcasing the powerful interoperability between.net and unmanaged C++ code the most popular server-side engine modification, R1Q2, is generally recommended as a replacement for the 3.20 release for both clients and servers the most widely used engine modifications as of 2006 appear to be R1Q2, AprQ2 and EGL, with alarge majority of users still using the original 3.20 release

6 Ports slide 21 Nintendo 64 port of Quake II slide 22 ports of Quake IIwere released in 1999 on the Nintendo 64 (ported by Raster Productions L.L.C. ) and PlayStation (ported by HammerHead Ltd.) console platforms in both cases, the core gameplay was largely identical; however, changes were made to the game sequence, split-screen multiplayer replaced network or Internet play the Nintendo 64 version, unlike the PlayStation version, had completely different levels and multiplayer maps which had never been seen before this version also had new lighting effects, mostly seen on gun fire, and also used the expansion pack to offer extra graphical detail SGI port was made in 1999 by Philip Nemec in 2002, the game was ported to the Amiga PowerPC platform by Hyperion Entertainment there was also an unofficial port for the Sega Dreamcast, another port to Xbox, named Quake2X, and an unfinished port to Playstation 2 via homebrew coders Xbox 360 port of Quake II slide 23 Quake 2 slide 24 ported version of Quake IIwas included in the box of Quake 4for the Xbox 360 on a bonus disc adirect port of the original game, and does not feature any graphical improvements, other than it may render in 480p and 720p it does allow for System Link play for up to 16 players, split-screen for 4 co-operative play in single player for up to 16 players or 4 with split-screen alone has some of same weapons as Quake 1,and some new ones pistol, shotgun, super shotgun, Machine gun, Chaingun, Hand Grenade, Grenade Launcher, Rocket Launcher, Hyper Blaster, Railgun, BFG10K players can also throw grenades recall that Quake had axe, shotgun, double-barreled shotgun, nailgun, supernailgun, grenade launcher, rocket launcher, thunderbolt generally accepted that the multiplayer component of Quake 2ismuch better than the single player game

7 Quake 2Mods slide 25 Question slide 26 there are so many, capture the flag, new skins, maps, deathmatch maps etc which of the three quake game engines begat this game engine? screencapture floppsie.comp.glam.ac.uk/avi/ nexuiz_promo_video.h264.avi