Graphics.DrawMeshInstancedIndirect with different colors ?

Hello ! I am working on a GPU Instanced Particle System and I am wondering how I could apply different colors to the things that I am creating !

Since the DrawMeshInstancedIndirect can get only one MaterialPropertyBlock, I tried another solution by doing a fixed4 StructuredBuffer and a CompteBuffer of colors and applying a color by instance ID, it didnt work (or maybe i did it wrong)

I need your help !

 

Ohhh really nice !! I tried to do it like in the documentation but it wasnt working, so I tried as you said with a float (to begin, and then if it works go with uint) and I did try again and it worked !! Thank you !!

 

What do you mean with uint?
How can i use uInt for Color control in my shader script or must this also be inside a normal script?

Iam using DrawMeshInstancedIndirect for drawing large amounts of cubes first, now my render threat is only by 0,2ms but the cpu is using 14,2ms or more, how can i reduce the cpu usage?

Code (CSharp):

1. Shader "Instanced/InstancedVertexShader" {
2.     SubShader {
3.         Tags { "RenderType"="Opaque" }
4.         LOD 100
5.  
6.         Pass {
7.             CGPROGRAM
8.             #pragma vertex vert
9.             #pragma fragment frag
10.             #pragma multi_compile_instancing
11.             #include "UnityCG.cginc"
12.  
13.             StructuredBuffer<float4> positionBuffer;
14.             StructuredBuffer<float4> colorBuffer;
15.            
16.             struct v2f
17.             {
18.                 float4 vertex : SV_POSITION;
19.                 float4 color : COLOR0;
20.             };
21.  
22.             v2f vert(appdata_full v, uint instanceID : SV_InstanceID) {
23.                
24.                 float4 data = positionBuffer[instanceID];  
25.                 float4 color = colorBuffer[instanceID];
26.                 float3 localPosition = v.vertex.xyz * data.w;
27.                 float3 worldPosition = data.xyz + localPosition;
28.                 float3 worldNormal = v.normal;
29.                                
30.                 v2f o;
31.                 o.vertex = mul(UNITY_MATRIX_VP, float4(worldPosition, 1.0f));
32.                 o.color = color;
33.                 return o;
34.             }
35.            
36.             fixed4 frag (v2f i) : SV_Target
37.             {
38.                 return i.color;
39.             }
40.             ENDCG
41.         }
42.     }
43. }

thats my simple vertex shader, iam newly in scripting shaders if you see some optimize let me know.
iam from germany so sorry for bad english.

iam also find this:
https://forum.unity.com/threads/loo...color-data-into-a-float-in-shader-lab.189728/

its sounds interesting but i dont know much about the Decode process or something.

i need to maximum optimize my game, because it should be for all plattforms and many players in a open world.