From: Charles McGarvey Date: Mon, 27 Jul 2009 21:37:27 +0000 (-0600) Subject: main loop code fixed to decouple updates and draws X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=commitdiff_plain;h=838bc00015eb7f583c7cf4b3b1007697bf047da1;hp=3e195be39157284a7f05b23a8a635adf26c10ee4 main loop code fixed to decouple updates and draws other miscellaneous fixes included --- diff --git a/Makefile.am b/Makefile.am index ad16dbe..95437f2 100644 --- a/Makefile.am +++ b/Makefile.am @@ -6,8 +6,8 @@ SUBDIRS = yajl src data doc EXTRA_DIST = yajl run: all - $(top_srcdir)/src/yoink + $(MAKE) -C src run debug: all - gdb $(top_srcdir)/src/yoink + $(MAKE) -C src debug diff --git a/README b/README index 8eb36d8..0193c48 100644 --- a/README +++ b/README @@ -10,10 +10,14 @@ The new code is released under the Simplified BSD License. The old code and original resources are provided under the zlib/libpng License. See COPYING for complete details. -External Dependencies: -GL -SDL -SDL_image -boost +Dependencies: + +boost headers 1.35.0 +libGL +libSDL 1.2.13 +libSDL_image 1.2.7 + +Note: The version numbers are the versions I have been using for development, +not necessarily the minimum required version numbers. diff --git a/configure.ac b/configure.ac index 7b40bb3..63f2034 100644 --- a/configure.ac +++ b/configure.ac @@ -70,12 +70,12 @@ AC_ARG_WITH([assetdir], [eval DATADIR="$datarootdir/yoink"]) AC_SUBST([DATADIR]) - AC_DEFINE_UNQUOTED([YOINK_DATADIR], ["$DATADIR"], [Define to path of game asset directory.]) -AC_DEFINE_UNQUOTED([YOINK_CONFIGFILES], - ["\$HOME/.yoinkrc:/etc/yoinkrc:$DATADIR/yoinkrc"], +CONFIGFILES="\$HOME/.yoinkrc:/etc/yoinkrc:$DATADIR/yoinkrc" + +AC_DEFINE_UNQUOTED([YOINK_CONFIGFILES], ["$CONFIGFILES"], [Define to colon-delimited config file paths.]) diff --git a/data/yoinkrc b/data/yoinkrc index 67be5c1..102848b 100644 --- a/data/yoinkrc +++ b/data/yoinkrc @@ -7,10 +7,10 @@ "video.multisamplebuffers": 6, "video.multisamplesamples": 6, "video.cursor": true, - "video.grab": false, + "input.grab": false, "video.doublebuffer": true, "video.swapcontrol": true, - "engine.maxfps": 45, - "engine.printfps": true, + "video.maxfps": 45, + "video.printfps": true, "engine.timestep": 0.01 } diff --git a/doc/yoink.6.in b/doc/yoink.6.in index 70bcca5..5425c3a 100644 --- a/doc/yoink.6.in +++ b/doc/yoink.6.in @@ -34,18 +34,20 @@ Yoink \- An alien-smashing action game. .PP Leap tall buildings! Crush stupid robots beneath your feet! Wield your extra-terrestrial powers in the defence of humanity, and send those alien -invaders back from whence they came! Do all these things (apart from the last -one at the moment) in Yoink! You play the part of a flying alien heroine who -must defend her home on Earth from other airborne alien invaders. The game -draws inspiration from classic arcade games like Joust, Bombjack, Rampage, and -Defender--simple, fast-moving action. +invaders back from whence they came! This is Yoink. .PP +You play the part of a flying alien heroine who must defend her home on Earth +from other airborne alien invaders. The game draws inspiration from classic +arcade games like Joust, Bombjack, Rampage, and Defender--simple, fast-moving +action. Basic arguments include: .TP .B -h, --help display this help and exit .TP .B -v, --version output version information and exit +.br +.SH TIPS .PP To attack, you must dive on the enemy at high speed. If you're going too slowly, you'll just drift harmlessly by. Diving from above gives different @@ -90,7 +92,7 @@ This is an optional environment variable. This is a specific user's configuration file. .TP 3. /etc/yoinkrc -This is a system-wide configuration file. +This is the system-wide configuration file. .TP 4. @DATADIR@/yoinkrc This is the base configuration file which should be considered read-only. Look @@ -100,33 +102,47 @@ Options that are passed as arguments take precedence over options loaded from the configuration file(s). This mechanism is good for running the game with a temporary setting which you do not intend to retain. Keep in mind that if you edit and save options in-game, any options you have passed as arguments during -the invocation of the game will be saved to the $HOME/.yoinkrc configuration -file. You may have to go into that file and remove any options you didn't -intend to set. When passing options as arguments, you must use the fully -qualified name of the option if it exists in a subgroup. For example: +the invocation of the game will be saved to the +.I $HOME/.yoinkrc +configuration file. You may have to go into that file and remove any options +you didn't intend to set. When passing options as arguments, you must use the +fully qualified name of the option if it exists in a subgroup. For example: .PP .TP yoink video.fullscreen=true -Set the option video.fullscreen to true. This will run the game in full-screen -mode. +Set the option +.I video.fullscreen +to true. This will run the game in full-screen mode. .TP yoink video.maxfps=60 -Set the option video.maxfps to 60. This will cap the display rate at 60Hz. +Set the option +.I video.maxfps +to 60. This will cap the display rate at 60Hz. .PP -You can also set options with array values. Arrays can be passed on the -command line by surrounding all the parts with square brackets and separating -each part by a comma. For example: +You can also set options with array values. Arrays can be passed on the command +line by surrounding all the parts with square brackets and separating each part +by a comma. For example: .TP yoink video.mode=[1024,768] -Set the option video.mode to an array with numbers 1024 and 768. The video size -will be 1024x768. +Set the option +.I video.mode +to an array with numbers 1024 and 768. The video size will be 1024x768. .PP Here is a list of some of the options available: .TP .B engine.timestep The amount of time in seconds between each update of the physics state. A value of 0.01 or lower is ideal for accurate physics approximations. Values that are -much lower may introduce errors in the game. +much higher cause the CPU to do less work, but accuracy will suffer. Errors +could be introduced in the game with extremely high values. +.TP +.B game.detail +The level of detail. Possible values are high, medium, and low. This effects +the number of objects drawn to the screen. A high level of detail will draw +everything but could cause poor frame rates if the graphics driver can't keep up +with the load. Lower levels will omit certain details which aren't crucial for +playing the game with the benefit of higher frame rates. See the Notes for more +ways to get good performance. .TP .B input.grab Takes a boolean (true or false). If true, the cursor pointer will be "stuck" @@ -139,7 +155,7 @@ This takes an array of four number values which represent the number of bits to use for red, green, blue, and the alpha channel. This is a low-level option of limited usefulness. The default value is almost always preferable. .TP -.B video.cursor +.B video.showcursor This option effects the visibility of the cursor while it is "hovering" over the window. If the value is true, the cursor will be visible. Otherwise, the cursor will be hidden. @@ -167,8 +183,8 @@ significantly lower the quality of the animation. .B video.mode The resolution or size of the window. The value is an array with three number elements representing the width, height, and bits per pixel that make up the -video mode.. A typical value is [800,600,32] for a size of 800x600 pixels with -millions of colors. +video mode. A typical value is [800,600] for a size of 800x600 pixels with +millions of colors (the third number is optional). .TP .B video.multisamplebuffers The number of multisample buffers used. @@ -221,12 +237,48 @@ will look in this directory first when it is loading game assets. Set this variable if you move the game's assets to another directory or want to load your own assets. .br +.SH NOTES +.PP +Yoink may or may not be playable with acceptable frame rates without a hardware +accelerated OpenGL driver installed and working, depending on how fast your CPU +is. Yoink is really not all that heavy on graphics, but it doesn't take much to +overload a software implementation. If you're stuck without hardware +acceleration, there are some things you can do to get better frame rates: +.PP +1. Decrease the resolution with the +.I video.mode +option. Due to the nature of the graphics in the game, you can go as low as +320x240 and not notice a large reduction in image quality. You can take +advantage of this by decreasing the resolution and running full-screen (so the +window is not so itty bitty on your monitor). This will help out a lot. Try +this: +.TP +yoink video.mode=[320,240] video.fullscreen=true +.PP +2. Decrease the level of detail with the +.I game.detail +option. +.PP +On the other hand, if you already get high frame rates, you may also want to cap +the rate so that your computer doesn't do more work than it really needs to. +This may be useful when you run +.B yoink +on your production server at work. You can get reasonably smooth animation at +around 30fps, but you can probably tell a difference between that and a higher +rate like 50fps. The latter will look noticeably smoother and nice, while the +former is just "acceptable." See the +.I video.maxfps +option. +.br .SH BUGS .PP +No sound yet. The original game never had sound, but it would probably be a +good idea. +.PP The pixelated graphics are actually intentional. It adds to the charm of the game, don't you think? .PP -Send bug reports and patches to: +Send bug reports, patches, and love notes to: .br Charles McGarvey .SH AUTHOR diff --git a/extra/yoink.ebuild b/extra/yoink.ebuild index a2b3116..16a430c 100644 --- a/extra/yoink.ebuild +++ b/extra/yoink.ebuild @@ -14,7 +14,7 @@ SLOT="0" KEYWORDS="~amd64 ~ppc ~x86" IUSE="debug" -RDEPEND="media-libs/libsdl[joystick,video] +RDEPEND="media-libs/libsdl[opengl] media-libs/sdl-image[png]" DEPEND="${RDEPEND} dev-util/pkgconfig" diff --git a/src/Makefile.am b/src/Makefile.am index 510dc9e..ca4f81e 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -71,3 +71,13 @@ yoink_LDADD = libdc.la EXTRA_DIST = cml + +YOINK_ENVIRONMENT = YOINK_DATADIR="$(top_srcdir)/data" \ + YOINK_CONFIGFILE="$(top_srcdir)/data/yoinkrc" + +run: all + $(YOINK_ENVIRONMENT) ./yoink + +debug: all + $(YOINK_ENVIRONMENT) gdb ./yoink + diff --git a/src/YoinkApp.cc b/src/YoinkApp.cc index 4b024b4..f0a1ad9 100644 --- a/src/YoinkApp.cc +++ b/src/YoinkApp.cc @@ -76,6 +76,13 @@ YoinkApp::YoinkApp(int argc, char* argv[]) : << "Send requests, patches, and bug reports to <" PACKAGE_BUGREPORT << ">." << std::endl << std::endl; + char* dataDir = getenv("YOINK_DATADIR"); + + if (dataDir) + { + dc::resource::addSearchPath(dataDir); + } + dc::resource::addSearchPath(YOINK_DATADIR); dc::dispatcher::instance().addHandler("video.context_recreated", diff --git a/src/engine.cc b/src/engine.cc index ec6faa1..7284799 100644 --- a/src/engine.cc +++ b/src/engine.cc @@ -75,11 +75,11 @@ public: timestep = scalar(ts); long maxfps = 40; - config.get("engine.maxfps", maxfps); + config.getNumber("video.maxfps", maxfps); drawrate = 1.0 / scalar(maxfps); printfps = false; - config.get("engine.printfps", printfps); + config.get("video.printfps", printfps); } ~engine_impl() @@ -92,6 +92,13 @@ public: } + /** + * The main loop. This just calls dispatchEvents(), update(), and draw() + * over and over again. The timing of the update and draw are decoupled. + * The actual frame rate is also calculated here. This function will return + * with a value of 0 if the member variable running becomes true. + */ + int run() { scalar ticksNow = ticks(); @@ -101,6 +108,7 @@ public: scalar nextFPSUpdate = ticksNow + 1.0; scalar totalTime = 0.0; + scalar deltaTime = 0.0; scalar accumulator = timestep; fps = 0; @@ -109,26 +117,22 @@ public: running = true; do { - dispatchEvents(); - scalar newTicks = ticks(); - accumulator += newTicks - ticksNow; + deltaTime = newTicks - ticksNow; ticksNow = newTicks; - if (accumulator >= timestep) + if (deltaTime >= 0.25) deltaTime = 0.25; + accumulator += deltaTime; + + while (accumulator >= timestep) { + dispatchEvents(); interface->update(totalTime, timestep); totalTime += timestep; accumulator -= timestep; nextStep += timestep; - if (ticksNow >= nextStep) - { - // we missed some scheduled steps, so reset the schedule - nextStep = ticksNow + timestep; - accumulator = 0.0; - } } if (ticksNow >= nextDraw) diff --git a/src/settings.hh b/src/settings.hh index 9c2f2d8..f2a7aed 100644 --- a/src/settings.hh +++ b/src/settings.hh @@ -58,6 +58,8 @@ public: template bool get(const std::string& key, T& value); + template + bool getNumber(const std::string& key, T& value); private: std::map map; @@ -80,6 +82,21 @@ bool settings::get(const std::string& key, T& value) } } +template +bool settings::getNumber(const std::string& key, T& value) +{ + std::map::const_iterator i = map.find(key); + + if (i != map.end()) + { + serializable_ptr obj = (*i).second; + return obj->getNumber(value); + } + else + { + return false; + } +} } // namepsace dc diff --git a/src/video.cc b/src/video.cc index 6960a0b..7ad8efc 100644 --- a/src/video.cc +++ b/src/video.cc @@ -340,8 +340,8 @@ video::attributes::attributes() settings::instance().get("video.fullscreen", fullscreen); settings::instance().get("video.resizable", resizable); - settings::instance().get("video.cursor", cursorVisible); - settings::instance().get("video.grab", cursorGrab); + settings::instance().get("video.showcursor", cursorVisible); + settings::instance().get("input.grab", cursorGrab); }