fragment shader different color for every vertex?

Question

can i make different colors fore every instance of this shader? do i have to send instance to o.output or something? how can i do it?

                                StructuredBuffer<float3> buf_Points;
                 StructuredBuffer<float3> buf_Positions;

                 struct ps_input {
                     float4 pos : SV_POSITION;
                 };

                 ps_input vert (uint id : SV_VertexID, uint inst : SV_InstanceID)
                 {
                     ps_input o;
                     float3 worldPos = buf_Points[id] + buf_Positions[inst];
                     o.pos = mul (UNITY_MATRIX_VP, float4(worldPos,1.0f));
                     return o;
                 }

                 float4 frag (ps_input i) : COLOR
                 {
                     return float4(1,0.5f,0.0f,1);
                 }

                 ENDCG

Answer 1

Answer by drudiverse · Mar 15, 2016 at 11:27 AM

solved it. its possible:"

         struct ps_input {
             float4 pos : SV_POSITION ;
             float4 col : COLOR;
         };

         ps_input vert (uint id : SV_VertexID, uint inst : SV_InstanceID)
         {
             bla

             
     
             o.pos = mul (UNITY_MATRIX_VP, float4(worldPos,1.0f));
             o.col = float4(sin(inst),0,0,1);
             return o;
         }

         float4 frag (ps_input i) : COLOR
         {
             return i.col;//float4(0.7f,.7f,.7f,1);
         }

         ENDCG

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fragment shader different color for every vertex?

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