I'm new to Unity/C# and building a simple game in order to learn it; essentially it involves flying over a terrain and shooting at things.
The question is - How can I create a non-flat, fixed size (ie, not endless) 2D terrain that I can randomise/generate once at the start of a scene.
Here's what I've thought/tried so far:
I started off by creating a massive, flat expanse using a game object with a Sprite Renderer and a Box Collider 2D. I'm using particles for rocket trails and explosions and set them to collide with a plane which worked well. This works, but the terrain is just flat and boring.
Next, I drew some rudimentary mountains in photoshop, added them as sprites with polygon collider 2D components and dragged them onto the scene (with an idea to randomise their locations later). This is quick and works well but doesn't play nice with the particles because of the 2D/3D mix, and I imagine would lead to all levels looking the same unless I can draw a LOT of different terrain sprites. Is this a normal approach? Is it possible to add more planes to the objects to allow particles to collide?
Another thought was - could I create a polygon collider 2D / or edge collider 2D and basically fill the area with a texture? No luck on that one, it seems like it could work but I couldn't get a texture to appear and fit the shape. A shame, especially as I could then generate or randomise the position of the points later.
Finally, I wondered whether I should just use 3D shapes. I can texture them and it works great with the particles, but doesn't interact right now with all my other 2D assets, I'd have to add 3D colliders to them and that doesn't seem right, since Unity specifically provides a 2D toolset and I am trying to make a 2D game.
All of my solutions have pros and cons - maybe there's something I've missed?
You can create meshes procedurally in unity in scripts. They can be either 2d or 3d depending on how you set the vertices. Colliders are independent of the rendered mesh. I dont have an indepth tutorial for this but i think this video will hint you in the right direction and give you keywords to google or read about in the unity documentation:
https://www.youtube.com/watch?v=nPX8dw283X4
Related
I'm trying to create a platform game, watching videos and tutorials I see that they use the Tile Palette option very frequently.
When creating the 2D Tilemap Collider, each square has its collider, and I guess that makes it consume a lot of resources, so to solve that I create a 2D Composite collider.
The problem is when the player collides with the collider of a vertical wall, causing the player's rigidBody.velocity.y to add force and that doesn't allow me to execute the jump.
https://clipchamp.com/watch/nFKCJOv7DEX
Here you can see under the scene of the game the debug.log that ends up showing me a speed to the Y axis
This project would be for android, and I would like to optimize it as much as possible. Do you have any idea so that in that collision I do not add force Y?
I have tried to change the speed in an onColliderStay2d and put the vertical tilemaps with another tag to differentiate them from the ground, but nothing.
Instead of checking your y velocity to see if you are grounded or not I recommend just making a rectangular area under your player character and check if it overlaps with the ground using Physics2D.OverlapArea. It's way less error prone.
Also, just because composite collider creates less shapes than tilemap collider doesn't mean it is less performant, the physics system doesn't iterate them one by one. Do yourself a favor and just use the tilemap collider instead.
Im working on a build-engine style unity game, and something regarding my explosion sprites has really been bugging me. My map is split into several pieces for both occlusion culling and my method for dimming certain sections. I want this explosion sprite to only render up until the nearest wall to its left and right, I thought that maybe sprite masks would work but I can't think of any way to implement this in code.
So I've got an idea and I'm wondering if it's even possible, and if so, how to implement it. Say I have a 3D Globe in a scene as a representation of Earth, and in the corner of the same scene I have a 2D map of Earth. I want to click on an area on the 2D Map, say Japan, and have a gameobject appear both on the 2D map and at the correct spherical coordinates for Japan on the 3D globe. Vice versa implementation would be great too. Is that something that can be done?
I am working on a 3D game and it has lots of game objects in a scene. So I'm working on reducing draw calls. I'v used mesh combining on my static game objects. But my player is'n static and I can't use mesh combining on it. My player is nothing but combination of some cubes which uses the standard shader and some different color Materials on different parts. So I'm guessing, I can use texture atlasing on my player to reduce darw calls. But I don't know how to do it.
Is my theory of work right? If I'm right please help me with atlasing, and if I'm wrong please point out my fault.
Thanks in advance.
Put all the required images into the same texture. Create a material from that texture. Apply the same material to all of the cubes making up you character. UV map all cubes to the relevant part of the texture (use UV offset in the Unity editor if the UV blocks are quite simple, otherwise you'll need to move the UV elements in your 3D modelling program).
I'm creating simple game and I need to create extending cylinder. I know how to normally do it - by changing objects pivot point and scaling it up, but now I have texture on it and I don't want it to stretch.
I fought about adding small segments to the end of the cylinder when it has to grow, but this wont work smooth and might affect performance. Do you know any solution to this?
This the rope texture that I'm using right now(but it might change in the future):
Before scaling
After scaling
I don't want it to stretch
This is not easy to accomplish but it is possible.
You have two ways to do this.
1.One is to procedurally generate the rope mesh and assign material real-time. This is complicated for beginners. Can't help on this one.
2.Another solution that doesn't require mesh procedurally mesh generation. Change the tiles while the Object is changing size.
For this to work, your texture must be tileable. You can't just use any random texture online. Also, you need a normal map to actually make it look like a rope. Here is a tutorial for making a rope texture with normal map in Maya. There are other parts of the video you have to watch too.
Select the texture, change Texture Type to Texture, change Wrap Mode to Repeat then click Apply.
Get the MeshRenderer of the Mesh then get Material of the 3D Object from the MeshRenderer.Use ropeMat.SetTextureScale to change the the tile of the texture. For example, when changing the xTile and yTile value of the code below, the texture of the Mesh will be tiled.
public float xTile, yTile;
public GameObject rope;
Material ropeMat;
void Start()
{
ropeMat = rope.GetComponent<MeshRenderer>().material;
}
void Update()
{
ropeMat.SetTextureScale("_MainTex", new Vector2(xTile, yTile));
}
Now, you have to find a way to map the xTile and yTile values to the size of the Mesh. It's not simple. Here is complete method to calculate what value xTile and yTile should be when re-sizing the mesh/rope.