#version 450
#extension GL_GOOGLE_include_directive : require
layout(local_size_x = 64) in;
#include "fx_common.glsl"
#include "generated/proj_lua_generated.glsl"

// Serial prevents a recycled projectile slot from executing a previous task.
// x=cast serial, y=scheduled frame, z=1 pending / 2 complete, w=fault code.
layout(std430, set = 0, binding = 64) buffer LuaTasks { uvec4 luaTasks[]; };

void main() {
    uint id = gl_GlobalInvocationID.x;
    if (id >= uint(FP_MAX)) return;
    uvec4 task = luaTasks[id];
    if (task.z != 1u) return;
    luaTasks[id].z = 2u;
    FProj p = fprojs[id];
    if (task.y != uint(pc.frame) || task.x != uint(p.d.w) || p.d.w == 0 || (p.d.z & (1 << 29)) != 0) { luaTasks[id].w = 13u; return; }
    int owner = int(p.e.z) - 1;
    if (owner < 0 || owner >= ctrl.inp.w) { luaTasks[id].w = 3u; return; }
    uvec4 fault = ngp_execute(p, vec3(ents[owner].a.xy, 0.0), float(owner + 1));
    luaTasks[id].w = fault.x;
    // Bindings write only this projectile. No state races between invocations.
    fprojs[id] = p;
}