use InputInstruction to drastically reduce the size of mouse instructions

This commit is contained in:
Quaternions 2023-10-18 20:20:36 -07:00
parent 261854cfa5
commit e9ba0c694c
2 changed files with 51 additions and 62 deletions

View File

@ -19,8 +19,6 @@ pub enum PhysicsInstruction {
}
#[derive(Debug)]
pub enum PhysicsInputInstruction{
ReplaceMouse(MouseState,MouseState),
SetNextMouse(MouseState),
SetMoveRight(bool),
SetMoveUp(bool),
SetMoveBack(bool),
@ -29,22 +27,25 @@ pub enum PhysicsInputInstruction {
SetMoveForward(bool),
SetJump(bool),
SetZoom(bool),
ReplaceMouse(MouseState,MouseState),
SetNextMouse(MouseState),
Reset,
Idle,
}
#[derive(Debug)]
#[repr(u32)]
pub enum InputInstruction {
MoveMouse(glam::IVec2),
MoveRight(bool),
MoveUp(bool),
MoveBack(bool),
MoveLeft(bool),
MoveDown(bool),
MoveForward(bool),
Jump(bool),
Zoom(bool),
Reset,
Idle,
MoveRight(bool)=0,
MoveUp(bool)=1,
MoveBack(bool)=2,
MoveLeft(bool)=3,
MoveDown(bool)=4,
MoveForward(bool)=5,
Jump(bool)=6,
Zoom(bool)=7,
MoveMouse(glam::IVec2)=64,
Reset=100,
Idle=127,
//Idle: there were no input events, but the simulation is safe to advance to this timestep
//for interpolation / networking / playback reasons, most playback heads will always want
//to be 1 instruction ahead to generate the next state for interpolation.

View File

@ -87,72 +87,60 @@ loop{
BLOCK_DEMO_HEADER:
//timeline of loading maps, player equipment, bots
*/
struct PhysicsInputInstructionDeltaState{
struct InputInstructionDeltaState{
mouse_pos:glam::IVec2,
time:crate::integer::Time,
}
//everything must be 4 byte aligned, it's all going to be compressed so don't think too had about saving less than 4 bytes
//8B - 24B
fn write_input_instruction<W:std::io::Write>(state:&mut PhysicsInputInstructionDeltaState,w:&mut W,ins:&crate::instruction::TimedInstruction<crate::physics::PhysicsInputInstruction>){
//8B - 12B
//TODO: Omit (mouse only?) instructions that don't surround an actual physics instruction
fn write_input_instruction<W:std::io::Write>(state:&mut InputInstructionDeltaState,w:&mut W,ins:&crate::instruction::TimedInstruction<crate::physics::InputInstruction>){
let dt=ins.time-state.time;
//TODO: insert idle instruction if gap is over u32 nanoseconds
//OR: end the data block! the full state at the start of the next block will contain an absolute timestamp
w.write(&(dt.nanos() as u32).to_le_bytes());//4B
let parity=match &ins.instruction{
crate::physics::PhysicsInputInstruction::SetMoveRight(true)
|crate::physics::PhysicsInputInstruction::SetMoveUp(true)
|crate::physics::PhysicsInputInstruction::SetMoveBack(true)
|crate::physics::PhysicsInputInstruction::SetMoveLeft(true)
|crate::physics::PhysicsInputInstruction::SetMoveDown(true)
|crate::physics::PhysicsInputInstruction::SetMoveForward(true)
|crate::physics::PhysicsInputInstruction::SetJump(true)
|crate::physics::PhysicsInputInstruction::SetZoom(true)=>1u32<<31,
crate::physics::PhysicsInputInstruction::SetMoveRight(false)
|crate::physics::PhysicsInputInstruction::SetMoveUp(false)
|crate::physics::PhysicsInputInstruction::SetMoveBack(false)
|crate::physics::PhysicsInputInstruction::SetMoveLeft(false)
|crate::physics::PhysicsInputInstruction::SetMoveDown(false)
|crate::physics::PhysicsInputInstruction::SetMoveForward(false)
|crate::physics::PhysicsInputInstruction::SetJump(false)
|crate::physics::PhysicsInputInstruction::SetZoom(false)
|crate::physics::PhysicsInputInstruction::ReplaceMouse(_,_)
|crate::physics::PhysicsInputInstruction::SetNextMouse(_)
|crate::physics::PhysicsInputInstruction::Reset
|crate::physics::PhysicsInputInstruction::Idle=>0u32,
crate::physics::InputInstruction::MoveRight(true)
|crate::physics::InputInstruction::MoveUp(true)
|crate::physics::InputInstruction::MoveBack(true)
|crate::physics::InputInstruction::MoveLeft(true)
|crate::physics::InputInstruction::MoveDown(true)
|crate::physics::InputInstruction::MoveForward(true)
|crate::physics::InputInstruction::Jump(true)
|crate::physics::InputInstruction::Zoom(true)=>1u32<<31,
crate::physics::InputInstruction::MoveRight(false)
|crate::physics::InputInstruction::MoveUp(false)
|crate::physics::InputInstruction::MoveBack(false)
|crate::physics::InputInstruction::MoveLeft(false)
|crate::physics::InputInstruction::MoveDown(false)
|crate::physics::InputInstruction::MoveForward(false)
|crate::physics::InputInstruction::Jump(false)
|crate::physics::InputInstruction::Zoom(false)
|crate::physics::InputInstruction::MoveMouse(_)
|crate::physics::InputInstruction::Reset
|crate::physics::InputInstruction::Idle=>0u32,//TODO: don't write idle instructions
};
//instruction id packed with game control parity bit. This could be 1 byte but it ruins the alignment
w.write(&(ins.instruction as u32|parity).to_le_bytes());//4B
match &ins.instruction{
crate::physics::PhysicsInputInstruction::ReplaceMouse(m0,m1)=>{//16B
let dm0=m0.pos-state.mouse_pos;
w.write(&(dm0.x as i16).to_le_bytes());
w.write(&(dm0.y as i16).to_le_bytes());
w.write(&((m0.time-ins.time).nanos() as u32).to_le_bytes());
let dm1=m1.pos-m0.pos;
w.write(&(dm1.x as i16).to_le_bytes());
w.write(&(dm1.y as i16).to_le_bytes());
w.write(&((m1.time-m0.time).nanos() as u32).to_le_bytes());
state.mouse_pos=m1.pos;
},
crate::physics::PhysicsInputInstruction::SetNextMouse(m)=>{//8B
let dm=m.pos-state.mouse_pos;
&crate::physics::InputInstruction::MoveMouse(m)=>{//4B
let dm=m-state.mouse_pos;
w.write(&(dm.x as i16).to_le_bytes());
w.write(&(dm.y as i16).to_le_bytes());
w.write(&((m.time-state.time).nanos() as u32).to_le_bytes());
state.mouse_pos=m.pos;
state.mouse_pos=m;
},
//0B
crate::physics::PhysicsInputInstruction::SetMoveRight(_)
|crate::physics::PhysicsInputInstruction::SetMoveUp(_)
|crate::physics::PhysicsInputInstruction::SetMoveBack(_)
|crate::physics::PhysicsInputInstruction::SetMoveLeft(_)
|crate::physics::PhysicsInputInstruction::SetMoveDown(_)
|crate::physics::PhysicsInputInstruction::SetMoveForward(_)
|crate::physics::PhysicsInputInstruction::SetJump(_)
|crate::physics::PhysicsInputInstruction::SetZoom(_)
|crate::physics::PhysicsInputInstruction::Reset
|crate::physics::PhysicsInputInstruction::Idle=>(),
crate::physics::InputInstruction::MoveRight(_)
|crate::physics::InputInstruction::MoveUp(_)
|crate::physics::InputInstruction::MoveBack(_)
|crate::physics::InputInstruction::MoveLeft(_)
|crate::physics::InputInstruction::MoveDown(_)
|crate::physics::InputInstruction::MoveForward(_)
|crate::physics::InputInstruction::Jump(_)
|crate::physics::InputInstruction::Zoom(_)
|crate::physics::InputInstruction::Reset
|crate::physics::InputInstruction::Idle=>(),
}
state.time=ins.time;
}