I want my camera to render like a 360 video. Is it possible?

Hello guys,

I'm looking to create a game where the camera will render the word like a 360° video on youtube but flat.
I want a rectangle with the world a bend inside it and where the player can see all over himself in one screen. It has to look like the following picture , but only one half is enought for me, I don't want to make 3D.



The picture comes from a unity blog article about capturing a video on a 360° format.
I look for the same render but I dont want to capture a video. The player should be able to play and seing this render..
Do you have any clue in what direction can I search for informations about making that ? Maybe I can solve this problem by making a shader who'll move the vextex and bend the world ?

I'm interested in any solution no matter if it's a paid asset, or maybe hire someone or making my own shader.
For now I'm stuck because I don't know in what direction I should search. And maybe it's not possible..

Thank you for your help and sorry for my english.

Dan

 

Try google "Quake 360 camera", if I remember correctly you can get full source of this project.

 

Thank you I'll take a loot at the source code. I presume it's a shader or something. Any other clues?

 

It's shader have two problem:
1st age of screen is warp zone, I think it can be fixed with geometry shader, but I never use them before.
2nd Far away objects become too small too fast.

Code (CSharp):

1. Shader "Unlit/CylProj"
2. {
3.     Properties
4.     {
5.         _MainTex ("Texture", 2D) = "white" {}
6.     }
7.     SubShader
8.     {
9.         Tags { "RenderType"="Opaque" }
10.         LOD 100
11.  
12.         Pass
13.         {
14.             CGPROGRAM
15.             #pragma vertex vert
16.             #pragma fragment frag
17.             // make fog work
18.             #pragma multi_compile_fog
19.  
20.             #include "UnityCG.cginc"
21.  
22.             struct appdata
23.             {
24.                 float4 vertex : POSITION;
25.                 float2 uv : TEXCOORD0;
26.             };
27.  
28.             struct v2f
29.             {
30.                 float2 uv : TEXCOORD0;
31.                 UNITY_FOG_COORDS(1)
32.                 float4 vertex : SV_POSITION;
33.             };
34.  
35.             sampler2D _MainTex;
36.             float4 _MainTex_ST;
37.  
38.             v2f vert (appdata v)
39.             {
40.                 v2f o;
41.  
42.                 float4 worldPos = mul(unity_ObjectToWorld, v.vertex);
43.  
44.                 float angleY = atan2(worldPos.z, worldPos.x);
45.                 angleY/=UNITY_TWO_PI;
46.                 float dist = length(worldPos);
47.  
48.                 worldPos.z = dist;
49.                 worldPos.x = angleY;
50.  
51.                 worldPos.y/=10;
52.                 worldPos.y *= -1;
53.                 worldPos.w = 0.5;
54.  
55.                 worldPos.z /= 100;
56.                 worldPos.z = 0.5-worldPos.z;
57.  
58.  
59.                 o.vertex = worldPos;
60.  
61.                 o.uv = TRANSFORM_TEX(v.uv, _MainTex);
62.                 return o;
63.             }
64.  
65.             fixed4 frag (v2f i) : SV_Target
66.             {
67.                 // sample the texture
68.                 fixed4 col = tex2D(_MainTex, i.uv);
69.                 UNITY_APPLY_FOG(i.fogCoord, col);
70.                 return col;
71.             }
72.             ENDCG
73.         }
74.     }
75. }
76.  

 

Thank you for the shader and the video. It's very helpfull.
This cylindral projection is a good start. Has the shader have to be applied on each object ? Would be possible to make a shader like a post-processing effect who make the job ?

 

I think you may do render to cubemap then do opposite thing to what I did in that shader: remap x axis of camera space(angle) to xz component of vector and use a Y component as is. Then you get that vector and sample with them from cubemap.
I suspect Unity already have tool for render a panoramic texture, and you just missed it somehow.