particle_intermediate make_particle_jet(int num, vec3f start, vec3f dir, float len, float angle, vec3f col, float speedmod)
{
std::vector<cl_float4> p1;
std::vector<cl_float4> p2;
std::vector<cl_uint> colours;
for(uint32_t i = 0; i<num; i++)
{
float len_pos = randf_s(0, len);
float len_frac = len_pos / len;
vec3f euler = dir.get_euler();
euler = euler + (vec3f){0, randf_s(-angle, angle), randf_s(-angle, angle)};
vec3f rot_pos = (vec3f){0.f, len_pos, 0.f}.rot({0.f, 0.f, 0.f}, euler);
vec3f final_pos = start + rot_pos;
final_pos = final_pos + randf<3, float>(-len/40.f, len/40.f);
float mod = speedmod;
p1.push_back({final_pos.v[0], final_pos.v[1], final_pos.v[2]});
vec3f pos_2 = final_pos * mod;
//p2.push_back({pos_2.v[0], pos_2.v[1], pos_2.v[2]});
col = clamp(col, 0.f, 1.f);
colours.push_back(rgba_to_uint(col));
}
