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April 29, 2017, 01:18:26 am

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TIGSource ForumsFeedbackDevLogsScraps: Modular Vehicle Combat - Vehicle combat with buildable vehicles
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Author Topic: Scraps: Modular Vehicle Combat - Vehicle combat with buildable vehicles  (Read 40978 times)
Nition
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« Reply #360 on: August 20, 2016, 07:47:46 pm »

This week I've been mostly placing content in Gauntlet mode levels. I did make an SMG drone as a less deadly version of the the existing MMG drone:



I also made a little Unity editor prefab placer script which I'll share for any Unity devs out there.

In Unity, if you want to add things to a scene you usually drag prefabs from the Project window, which is really just a folder view. It works pretty well but it means that you need to switch around in folders to find things, and you also can't see the object while you're positioning it. Unity provides pretty good tools to customise the editor so I made a little custom window instead:



It lets you spawn arbitrary prefabs with the buttons, and it automatically raycasts to the ground and places things there. You can show a visual indicator for placing invisible prefabs, and there's an option to give things a random starting rotation. You could also rotate the selected object with the keyboard like in the gif above, but for some reason it often ran at like 1fps and was horrible to use, so I've removed that feature.

The code isn't anything special because it's just meant for my personal use in the editor, but I'll share it here as I think it could be useful to other unity devs. If you're using it, read the code comments as there are some changeable things within, but it should work as-is as long as you replace the paths in LoadPrefabList with your own:

Code:
using UnityEngine;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;

// GUI editor interface for easily placing a set of hard-coded prefabs on a map
public class SimpleThingPlacer : EditorWindow {
// Set in inspector. Have this enabled to give prefabs a random starting rotation
[SerializeField]
bool randomYRotation = true;

// Got prefabs that don't have a visual model? Put their GameObject names here to see a visual indicator when holding them
readonly string[] prefabsThatNeedVisualIcons = {"VehicleSpawner"};

// Your prefabs can be assigned to categories you define here, and will show up in these groups in the editor window
enum Categories { NonEnemy, Enemy, Group }

Dictionary prefabs;
GameObject curHeldPrefab;

// #### UNITY INTERNAL METHODS ####

protected void OnGUI() {
if (Application.isPlaying) return;
if (prefabs.IsNullOrEmpty()) LoadPrefabList();

EditorGUILayout.BeginVertical("Box");
randomYRotation = EditorGUILayout.Toggle("Random Y rotation: ", randomYRotation);
EditorGUILayout.EndVertical();

// This is pretty basic - could be modified to auto-set NUM_PER_ROW based on window width
const int NUM_PER_ROW = 3;
const int ENTRY_HEIGHT = 64;
const int ENTRY_WIDTH = 80;
foreach (KeyValuePair category in prefabs) {
bool isInRow = false;
EditorGUILayout.BeginVertical("Box");
EditorGUILayout.LabelField(category.Key.ToString(), EditorStyles.boldLabel);
List p = category.Value;
for (int i = 0; i ();

// Replace these with the paths to the assets you want to show up
// Or these hard-coded paths could be replaced by automatically loading all assets in a folder etc
// Or maybe create an interface in the editor window itself to add/remove prefabs
AddPrefab(prefabs, Categories.NonEnemy,  "Assets/Prefabs/Environment/SinglePlayerPhysicsDamageable/Walls/WoodenWall.prefab");
AddPrefab(prefabs, Categories.NonEnemy, "Assets/Prefabs/Environment/SinglePlayerPhysicsDamageable/Walls/ConcreteBarrier.prefab");
AddPrefab(prefabs, Categories.Enemy, "Assets/Prefabs/EnemyNonVehicles/Drones/MMGDrone.prefab");
AddPrefab(prefabs, Categories.Enemy, "Assets/Prefabs/EnemyNonVehicles/Drones/SMGDrone.prefab");
AddPrefab(prefabs, Categories.Group, "Assets/Prefabs/GauntletSets/GauntletEarthRoadblock1.prefab");
}

// Path should start with the Assets forlder, e.g. "Assets/Textures/texture.jpg"
void AddPrefab(Dictionary prefabDict, Categories category, string path) {
GameObject prefab = AssetDatabase.LoadAssetAtPath(path, typeof(GameObject)) as GameObject;
if (prefab != null) {
ISpawnedThing ist = prefab.GetComponent(typeof(ISpawnedThing)) as ISpawnedThing;
if (ist != null) {
if (!prefabDict.ContainsKey(category)) prefabDict[category] = new List(1);
prefabDict[category].Add(prefab);
}
}
else {
Debug.LogWarning("Couldn't find prefab at: " + path);
}
}

void CreatePrefab(GameObject prefab) {
curHeldPrefab = (GameObject)Instantiate(prefab);
// Remove any automatic "(clone)" designation
curHeldPrefab.name = prefab.name;
if (randomYRotation) {
Vector3 eulerRot = curHeldPrefab.transform.eulerAngles;
eulerRot.y = Random.Range(0, 359);
curHeldPrefab.transform.eulerAngles = eulerRot;
}
Selection.activeGameObject = curHeldPrefab;
}

void ReleaseHeldPrefab() {
curHeldPrefab = null;
}

// Returns true if the input transform or any of its parents, grandparents etc have the specified tag.
static bool HasTransformInAncestors(Transform trans, Transform match) {
if (trans == match) return true;

trans = trans.parent;
while (trans != null) {
if (trans == match) return true;
trans = trans.parent;
}
return false;
}
}
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Nition
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« Reply #361 on: August 29, 2016, 12:04:37 am »

Last week I got a nice job offer that I've accepted, but it had to be a full-time position, so it's not going to leave much remaining time for Scraps unfortunately. It's an offer that I would be silly to ignore in favour of my obscure little game that I've already been working on for years without much success (income-wise anyway). Of course Scraps could take off in success after Gauntlet mode is added, or after it leaves Early Access, but historically that's very rare: Almost always if a game's sales are slow at first during Early Access, they remain a small-time thing at full release.

So I'm going to stop the current weekly news updates since development is gonna get real slow. I'll post whenever I have interesting new stuff to share instead.

Here's what I did in my last week of freedom:

I made some more level content. Yeah, I'm still on world 1, because I keep making things like tools for level building or things to put in the levels rather than actually putting things in levels. Subsequent maps should be way faster to populate, like how the terrains for worlds 2 and 3 were done much much faster than the terrain for world 1.


A thing I did this week in that vein was make a new type of vehicle spawner. I already had vehicle spawners that I could place on the map with a list of vehicles they could spawn. Looked like this in the editor:


When playing, they'd randomly select a vehicle to spawn from the list, and that worked OK. Gauntlet mode is sort of half procedural, half hand-placed, and it's important to be careful with how procedural it is. Fully hand placed would make it exactly the same every time, which would get boring fast. But fully procedural almost always ends up boring as well - a million variations on the same thing. No Man's Sky is the procedural game du jour to complain about, but there are many.

However, in this particular case I realised that there were many scenarios where I really just wanted a vehicle spawner that would spawn any vehicle I had that was appropriate for the current level. Same potential set for every spawner. On top of that, really the vehicles should get harder as you progressed to another level within the same world, but to do that currently I'd have to place multiple spawners and limit them to just the level they were intended for.

So I made a vehicle library that loads up all the vehicles I've put in a folder, and lets me select them with filters. For instance if I wanted a vehicle in a certain price range with only cheap weapons on it I could do:

Code:
vehicleLibrary.GetVehicle(VehicleFilters.TotalCost(minValue, maxValue),
VehicleFilters.EachWeaponCost(weaponCostLimit));

Or for a vehicle in a certain price range with a small chassis:

Code:
vehicleLibrary.GetVehicle(VehicleFilters.TotalCost(minValue, maxValue),
VehicleFilters.ChassisType(VehicleData.ChassisOptions.Small));

"But writing code every time? That sounds like even more work than placing two spawners." Well yeah, it would be, but I made a new vehicle spawner that automatically detects which Gauntlet level the player is on and sets the appropriate filters. So there's no vehicle info to set in the interface at all:


And I can still use the old spawner type if I want specific vehicle options.

In other news, at one point I also accidentally broke everything in a fun way:

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Nition
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« Reply #362 on: September 25, 2016, 12:41:29 pm »

The Unity engine has a built-in terrain system that's been around for ages. It's honestly pretty great actually, but it has a few quirks. The tree system is maybe the quirkiest part.

There's a special system for trees, separate from the one for placing glass and other detail stuff. Your trees must use two specific built-in shaders. Your trees must reside in a folder with the text "Ambient-Occlusion" in the name. They may have colliders, but other components on them will be ignored.

I tried the tree system out, I haven't used it before. It's got some nice features - for instance it'll automatically turn your trees into billboards at long distances to save rendering work (much like Jurassic Park: Tresspasser did way back in 1998). Although even that has its quirk - the billboards have a slightly different perspective to the meshes so they do some weird bending as they switch over.

I had it all working actually quite well, but the killer was the lack of support for custom components. The trees would have to be permanent; immovable. Scraps with indestructible trees? It wouldn't do.



Look at that realistic tree-smashing action (pls don't destroy trees IRL).

So anyway I added some trees.



(not to SandyBridge - I was just testing them there)

They're not using the special tree system. They're just meshes with a couple of LODs. LODs being levels of detail - showing the lower LOD at far distances. Works fine.

The trees I have actually came with two LODs already, but I wasn't exactly impressed. Does this look like a seamless transition to you?



The branches are fine. The leaves not so much. So I made my own low LOD versions that aren't particularly great either but everything looks OK.



I'm still adding level content. Each "world" in Gauntlet mode is big - but at least it does get reused for three levels. My new job is taking up a lot of time as I knew it would, but I'm still managing to get a little Scraps work done. See you next time.
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Nition
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« Reply #363 on: April 22, 2017, 10:08:02 pm »

Thank you for your extreme patience as I continue to bumble along with this game in what spare time I have. Last update, I suggested that I'd get Gauntlet mode's World 1 finished, and then work on the framework for Gauntlet mode iteself. In the end I decided to get the first two worlds done first, since both will be needed for a playable release of Gauntlet anyway. I've now got the content for the first two worlds complete.

The Gauntlet mode worlds will be loosely themed on the classical Greek elements: Earth, Water, Wind, Fire. Earth and Water now have all their content, and if I give them three levels each, that'll be enough for an initial release of the new game mode that you can try out. As in an actual game update, not just more progress news like this. What I still need to do first is write the framework around the new mode: How you enter levels, progress through them, repair between levels etc. It's stuff  that's mostly in the game already but it needs to be strung together correctly and have some new concepts added. At the moment to test Gauntlet mode, I use dev tools to select a vehicle and drop into a level manually. I'm afraid I don't have a release time estimate because the amount of time I have for Scraps currently varies a lot week by week. It'll get done.

I've also been making a few other changes to the game as I go, that'll make it in when Gauntlet launches. One I can show off is a new primary firing mode:





It's something that was brought up in the forums a while ago. People were carefully building vehicles that didn't have quite enough power supply for their weapons, so the weapons would end up dropping down into a sequential firing mode instead of all firing at once - meaning less recoil, and more spread out power and heat. Now that mode can be automatic, but the old mode is still there as well. There isn't really any additional complexity to worry about for the player - left-mouse will be the new mode, or right-mouse will fire using the all-at-once mode that's in the game now.


Some new screens of the Gauntlet worlds I've been making
EARTH is sort of the Green Hill zone of the thing. It's grassy hills and rocks and trees, and combat is against lewer-level enemies: Basic machine gun turrets, mostly micro vehicles, hover drones.



WATER is snow and ice. AI vehicles are more expensive and more frequent, turrets are more powerful, and drones are less common. But your vehicle will be more powerful too.

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« Reply #364 on: April 23, 2017, 09:55:04 am »

those maps are looking really gorgeous
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Nition
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« Reply #365 on: April 23, 2017, 12:40:02 pm »

Thanks! I'm using a hacked-up version of RTP for the terrain which helps a lot. The snow in particular is all a shader effect, with parallax so it sort of rises out of the ground instead of just fading out at the edges.
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