#pragma kernel CSMain

#include "UnityCG.cginc"
#include "../../ParticleWorks/Shader/Inc/Defines.cginc"

struct Vertex
{
	float3 position;
	float3 normal;
	float4 color;
	float4 uv;
	//float2 uv2;
	//float4 tangent;
};

RWStructuredBuffer<Particle> ssbo;
RWStructuredBuffer<Vertex> origin_buffer;
RWStructuredBuffer<Vertex> vertex_buffer;

[numthreads(WORK_GROUP_SIZE, 1, 1)]
void CSMain(uint3 id : SV_DispatchThreadID)
{
	Vertex o = origin_buffer[id.x];
	Vertex v = vertex_buffer[id.x];
	int index = o.uv.z;
	Particle p = ssbo[index];


	v.position = mul(p.model_matrix, float4(o.position, 1)).xyz;
	v.normal = mul((float3x3)p.model_matrix, o.normal);
	v.color = float4(p.color.rgb, 1.0f);
	v.uv = float4(o.uv.xy, 0, 0);

	float space_height = 3.0;
	float limit_height = 0.1;
	v.position.y = saturate(v.position.y / space_height) * limit_height;

	vertex_buffer[id.x] = v;
}