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Leadwerks on OUYA

Josh

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Last weekend I attended an OUYA game jam and got to play around with the OUYA dev kit for the first time. My goal was to see if I could get Leadwerks running on it over the weekend. I had problems with the USB driver, but compiling went smoothly:

ouya2.jpg

I didn't have any problems with controller latency, but did not finish mapping the controls or updating our project to use some newer functions we need. In the end, I had to manually copy the compiled .apk file to the device to deploy it. All in all, it was a good proof of concept.

ouya3.jpg

As we now pass the 60% mark, we're ready to unveil our first stretch goal. We want to put OUYA development in the hands of every Leadwerks developer, so we're making that our first stretch goal. There's still a lot of work to be done, but my tests last weekend prototyping Leadwerks on OUYA proved it was possible. When our campaign reaches the $26,000 mark, we will provide all backers who pledged $100 or more with OUYA support, delivered at the time Leadwerks for Linux is ready. This will let you build games for OUYA and Android, without ever leaving the Linux operating system.

ouya.jpg

Although the OUYA is new and the firmware still has a few rough spots, it's a lot of fun deploying games straight to your big-screen TV, and we've already prototyped it. We're looking forward to bringing OUYA game development to Linux users.

 

http://www.youtube.com/watch?v=uTQ8h-1rnZg



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so excited that leadwerks may be on a 'console' allowing indie developers and hobbyist to make 'console' games. I just hope that leadwerks doesn't try to take on too many challenges before a full LE3 is developed and that the original LE2 community and backers don't get left behind.

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The marginal cost of OUYA support is pretty low, and if the Kickstarter stretch goal is reached it pays for itself.

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  • Blog Entries

    • By reepblue in reepblue's Blog 5
      Loading sounds in Leadwerks has always been straight forward. A sound file is loaded from the disk, and with the Source class emits the sound in 3D space. The sound entity also has a play function, but it's only really good for UI sounds. There is also Entity::EmitSound() which will play the sound at the entity's location. (You can also throw in a Source, but it'll auto release the object when it's done.)
      While this is OK for small games, larger games in which sounds may change might mean you have to open your class, and adjust the sounds accordingly. What if you use the sound in multiple places and you're happy with the volume and pitch settings from an earlier implementation? You could just redefine the source in a different actor, but why should you?
      A solution I came up with comes from SoundScripts from the Source Engine. With that engine, you had to define each sound as a SoundScript entry. This allowed you to define a sound once, and it allowed for other sound settings such as multiple sounds per entry. I thought this over, and with JSON, we can easily create a similar system for Leadwerks 4 and the new engine.
      I first started with a dummy script so I can figure out how I wanted the end result to be.
      { "soundData": { "Error": { "file": "Sound/error.wav", "volume": 1.0, "pitch": 1.0, "range": 0.25 }, "RandomSound": { "files": { "file1": "Sound/Test/tone1.wav", "file2": "Sound/Test/tone2.wav", "file3": "Sound/Test/tone3.wav" }, "volume": 1.0, "pitch": 1.0, "range": 0.25 } } } In this script, we have two sound entries. We have an error sound (Which is suppose to be the fall back sound for an invalid sound entry) and we have a sound entry that holds multiple files. We want a simple, straight forward. entry like "Error" to work, while also supporting something "RandomSound" which can be used for something like footstep sounds.
      The script is streamed and stored into multiple structs in a std::map at the application start. We use the key for the name, and the value is the struct.
      typedef struct { std::string files[128]; char filecount; float volume; float pitch; float range; bool loopmode; } sounddata_t; std::map<std::string, sounddata_t> scriptedsounds; Also notice that we don't store any pointers, just information. To do the next bit, I decided to derive off of the engine's Source class and call it "Speaker". The Speaker class allows us to load sounds via the script entry, and support multiple sounds.
      You create one like this, and you have all the functionalities with the Source as before, but a few differences.
      // Speaker: auto speaker = CreateSpeaker("RandomSound"); When you use Play() with the speaker class and if the sound entry has a "files" table array, it'll pick a sound at random. You can also use PlayIndex() to play the sound entry in the array. I also added a SetSourceEntity() function which will create a pivot, parent to the target entity. From there, the Play function will always play from the pivot's position. This is a good alternative to Entity::EmitSound(), as you don't need to Copy/Instance the Source before calling the function as that function releases the Source as mentioned earlier. Just play the speaker, and you'll be fine! You can also change the sound entry at anytime by calling SetSoundEntry(const std::string pSoundEntryName); The creation of the Speaker class will start the JSON phrasing. If it has already been done, it will not do it again.
      Having sounds being loaded and stored like this opens up a lot of possibles. One thing I plan on implementing is a volume modifier which will adjust the volume based on the games volume setting.Right now, it uses the defined volume setting. It's also a part of another system I have in the works.
    • By Josh in Josh's Dev Blog 1
      I've been doing some work on the sound system in Leadwerks 5 beta, and I added EAX effects in. If you have a dedicated sound card this can be used to add some nice reverb effects that make your sound environment sound a lot more real:
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      auto fx = LoadSoundEffect("Sound/FX/sewerpipe.json"); auto listener = CreateListener(world); listener->SetEffect(fx); This will apply the effect to all mono sources. Stereo sources are assumed to be music or GUI noises, and will be unaffected. Eventually, the way I see this being used is a script attached to a CSG brush that changes the listener's EAX effect when the player enters and leaves the volume, but the above shows the API approach.
      I exported all the EAX presets into JSON files like so. You can load one of the existing files, or if you are feeling really creative you can try making your own:
      { "AirAbsorptionGainHF": 0.99426, "DecayHFLimit": 0, "DecayHFRatio": 0.89, "DecayLFRatio": 0.41, "DecayTime": 2.76, "Density": 1.0, "Diffusion": 0.82, "EchoDepth": 0.17, "EchoTime": 0.13, "Gain": 0.316228, "GainHF": 0.281838, "GainLF": 0.0891251, "HFReference": 2854.4, "LateReverbGain": 0.891251, "LateReverbPan": [0.0, 0.0, 0.0], "LFReference": 107.5, "LateReverbDelay": 0.02, "ModulationDepth": 0.0, "ModulationTime": 0.25, "ReflectionsDelay": 0.029, "ReflectionsGain": 0.354813, "ReflectionsPan": [0.0, 0.0, -0.0], "RoomRolloffFactor": 0.0 } Here's the full list of available presets:
      CastleSmallroom CastleMediumroom CastleLongpassage CastleLargeroom CastleHall CastleCupboard CastleCourtyard CastleAlcove FactoryAlcove FactoryShortPassage FactoryMediumRoom FactoryLongPassage FactoryLargeRoom FactoryHall FactoryCupboard FactoryCourtyard FactorySmallRoom IcepalaceAlcove IcepalaceShortPassage IcepalaceMediumRoom IcepalaceLongPassage IcepalaceLargeroom IcepalaceHall IcepalaceCupboard IcepalaceCourtyard IcepalaceSmallRoom SpacestationAlcove SpacestationMediumRoom SpacestationShortpassage SpacestationLongPassage SpacestationLargeRoom SpacestationHall SpacestationCupboard SpacestationSmallRoom WoodenAlcove WoodenShortPassage WoodenMediumRoom WoodenLongPassage WoodenLargeRoom WoodenHall WoodenCupboard WoodenSmallRoom WoodenCourtyard SportEmptyStadium SportSquashCourt SportSmallSwimmingPool SportLargeSwimmingPool SportGymnasium SportFullStadium SportStadiumTannoy Workshop SchoolRoom PractiseRoom Outhouse Caravan Dome Tomb PipeSmall DomeSaintPauls PipeLongThing PipeLarge PipeResonant OutdoorsBackyard OutdoorsRollingPlains OutdoorsDeepCanyon OutdoorsCreek OutdoorsValley MoodHeaven MoodHell MoodMemory DrivingCommentator DrivingPitGarage DrivingInCarRacer DrivingInCarSports DrivingFullGrandstand DrivingEmptyGrandstand DrivingTunnel CityStreets CitySubway CityMuseum CityLibrary CityUnderpass Dustyroom Chapel SmallWaterRoom I might consider implementing Steam Audio in the future (formerly Phonon) but for now OpenAL does everything I want.
    • By Josh in Josh's Dev Blog 7
      An update for Leadwerks 5 is now available.
      The Vulkan data transfer system has been revised and is now simpler but uses more memory. Data is likely to be quadruple-buffered, but it's a fairly small amount of data and this isn't a big concern. 
      I fixed a bad bug where multiple threads were accessing a global variable in the Mat4::GetQuaternion function. This fixes the object flashing glitch that was visible in previous builds.
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      I switched out the default scene with a new one using some of @TWahl 's materials.
      Added an FPSWeapon script that loads a gun and makes it sway.
      Entity::AddScript() can now be called in the Start() function of another script with no problems.
      Fullscreen windows are now working.
      The window / display system is changed a bit. New display commands:
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      --Get the primary display local displaylist = ListDisplays() local display = displaylist[1]; --Get the display's highest resolution graphics mode gfxmodes = display:GraphicsModes() gfx = gfxmodes[#gfxmodes] --Create a window local fullscreenmode = false local window if fullscreenmode then window = CreateWindow(display, "My Game", 0, 0, gfx.x, gfx.y, WINDOW_FULLSCREEN) else window = CreateWindow(display, "My Game", 0, 0, 1280 * display.scale.x, 720 * display.scale.y, WINDOW_CENTER + WINDOW_TITLEBAR) end And in C++:
      const bool fullscreenmode = false; //Get the primary display auto displays = ListDisplays(); auto display = displays[0]; //Create a window shared_ptr<Window> window; if (fullscreenmode) { auto gfxmodes = display->GraphicsModes(); auto gfx = gfxmodes[gfxmodes.size() - 1]; window = CreateWindow(display, L"My Game", 0, 0, gfx.x, gfx.y, WINDOW_FULLSCREEN); } else { Vec2 displayscale = display->GetScale(); window = CreateWindow(display, L"My Game", 0, 0, 1280 * displayscale.x, 720 * displayscale.y, WINDOW_TITLEBAR | WINDOW_RESIZABLE | WINDOW_CENTER); } The speed of the point light shadow updating is unbelievably fast. Point light shadows in Leadwerks 4 are very expensive to update because they require six different render passes for each of the six cubemap faces, but in Leadwerks 5 beta with Vulkan they are basically free. I'm sure it will slow down if I add enough points lights and have them all constantly updating, but I don't see any difference at all in the framerate right now when shadows are active. If you are having any trouble with their appearance you can set the global variable MULTIPASS_CUBEMAP to false in C++ at the very beginning of your program.

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      function Script:Start() self.statsEnabled = true self.textcache = {} self.font = LoadFont("Fonts/arial.ttf") self.fontsize = 16 self.textalignment = TEXT_LEFT self.world:EnableStats(self.statsEnabled) self:BindKey(KEY_F11, self.ToggleStats) end function Script:ToggleStats() self.statsEnabled = not self.statsEnabled self.world:EnableStats(self.statsEnabled) end function Script:Update() --Return if disabled or font missing if self.statsEnabled == false or self.font == nil then return end --Hide previously used sprite if self.displayfps ~= nil then self.displayfps:Hide() end --Retrieve the framerate and convert to string --Convert to integer to limit the amount of different string values local fps = tostring(math.ceil(self.world.renderstats.framerate - 0.5)).." FPS" --Check for cached version and create it if it doesn't exist if self.textcache[fps] == nil then self.textcache[fps] = CreateText(self.world, self.font, fps, self.fontsize, self.textalignment, 1) self.textcache[fps]:SetPosition(4,4) self.textcache[fps]:SetColor(0,1,0,0.75) end --Set current sprite and show self.displayfps = self.textcache[fps] self.displayfps:Show() end It may seem like a lot of code just to draw a bit of text onscreen, but the benefit is extreme performance. Instead of drawing one character at a time like the Leadwerks renderer does, this creates persistent text objects and reuses them when needed. That cuts the performance cost of displaying text down to basically zero, making it great for complex GUIs and game interfaces.
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