Jump to content

The Way Forward ... Making Blitzmax Trax ...

Marleys Ghost

931 views

Following on from "On The Right Path, A* Pathfinding In Leadwerks" I thought before I archive the code, I'd have a little "dabble" with a basic function to get an NPC reading the path data and then following it to the "target" I had a couple of ideas on how to do this but as time for playing in leadwerks was running out I opted for a basic idea.

 

1. Target Position Selected

2. Path from NPC to selection calculated.

3. Path transfered to a temp storage array for that particular NPC

4. An NPC Pilot reads that data.

5. NPC follows the pilot.

 

Think of the "pilot" as the plastic stick thing on the underside of a scaletrix car .. it follows the groove in the track and the car follows right along. This was the quickest and dirtiest method but solved a variety of issues in one. Plus I just wanted to get the NPC moving and the sands of time were running out.

 

So an hour later and I have not only the NPC following the generated path but the path is updated with a repositioning of the target and the pilot takes the NPC off onto the new track.

 

 

blogentry-12-077796100 1282573557_thumb.jpg

 

This is all still quick and dirty, when I can remember what the code does and does not need, I will up a small demo.exe to the thread Pathfinding With A*

 

EDIT: I have uploaded a demo.exe here : Hide And Seek Demo



1 Comment


Recommended Comments

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Blog Entries

    • By Josh in Josh's Dev Blog 2
      What's new
      EAX audio effects for supported hardware. Source class renamed to "Speaker". Plane joint for 2D physics, so now you can make Angry Birds with Vulkan graphics. Fixed DPI issues with fullscreen mode. Added impact noise to barrels, fixed Lua collision function not being called. Script functions now start with "Entity:" instead of "Script:", i.e. Entity:Update() instead of Script:Update(). Additionally, four examples can be run showing various functionality. Double-click on the .bat files to launch a different demo:
      First-person shooter game. 2D physics demonstration. Advanced 2D drawing with text, rotation, and scaling. Multi-camera setup.
    • By reepblue in reepblue's Blog 6
      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:
      Here's the simplest usage:
      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.
×
×
  • Create New...