#version 450

layout (local_size_x = 16) in;

struct Vertex {
    vec3 position;
    vec3 color;
    vec3 normal;
};

layout (std430, set = 0, binding = 0) buffer VertexBuffer {
    Vertex vertices[];
};

layout (std140, set = 0, binding = 5) uniform Sizes {
    uint vertexCount;
    uint faceCount;
};

layout (std140, set = 1, binding = 0) uniform UBO {
    float dt;
    vec3 gravity;
};

layout (push_constant) uniform PushConstants {
    uint state;
    int vertexOffset;
};

void preSolve(uint vID){
    vertices[vID].position += vec3(0.0001, 0, 0);
}

void postSolve(uint vID){
    vertices[vID].position += vec3(0, 0.0001, 0);
}

void main() {
    uint id = gl_GlobalInvocationID.x;
    switch (state){
        case 0:
            if (id < vertexCount){
                preSolve(id);
            }
            break;
        case 2:
            if (id < vertexCount){
                postSolve(id);
            }
            break;
    }
}