Struct Context 

pub struct Context { /* private fields */ }

Current replay state accessible to observers.

The context is passed to all observer callbacks and provides access to:

• Entity state and properties
• String tables
• Game event definitions
• Current tick and timing information
• Replay metadata

Examples

Accessing entities

use source2_demo::prelude::*;

#[derive(Default)]
struct HeroStats;

#[observer]
#[uses_entities]
impl HeroStats {
    #[on_tick_start]
    fn on_tick_start(&mut self, ctx: &Context) -> ObserverResult {
        for entity in ctx.entities().iter() {
            if entity.class().name().starts_with("CDOTA_Unit_Hero_") {
                let health: i32 = property!(entity, "m_iHealth");
                println!("{}: {}", entity.class().name(), health);
            }
        }
        Ok(())
    }
}

Accessing string tables

use source2_demo::prelude::*;

#[derive(Default)]
struct TableReader;

#[observer]
#[uses_string_tables]
impl TableReader {
    #[on_tick_start]
    fn on_tick_start(&mut self, ctx: &Context) -> ObserverResult {
        if let Ok(table) = ctx.string_tables().get_by_name("ActiveModifiers") {
            println!("Active modifiers: {}", table.iter().count());
        }
        Ok(())
    }
}

Implementations

impl Context

pub fn classes(&self) -> &Classes

Returns a reference to the entity container.

Use this to access all entities in the game and query their properties.

Examples

use source2_demo::prelude::*;

// Get entity by index
let entity = ctx.entities().get_by_index(0)?;

// Find entity by class name
let player_resource = ctx.entities().get_by_class_name("CDOTA_PlayerResource")?;

// Iterate all entities
for entity in ctx.entities().iter() {
    println!("{}", entity.class().name());
}

pub fn entities(&self) -> &Entities

Returns a reference to the entity container.

Provides access to all game entities and their properties. Requires Interests::ENABLE_ENTITY to be populated.

pub fn string_tables(&self) -> &StringTables

Returns a reference to the string tables.

String tables contain game data like hero names, item names, etc. Requires Interests::ENABLE_STRINGTAB to be populated.

pub fn game_events(&self) -> &GameEventList

Returns a reference to the game event list.

Contains definitions for all game events in the replay.

pub fn tick(&self) -> u32

Returns the current tick number.

The tick represents the current game simulation step. Typically runs at 30 ticks per second.

pub fn net_tick(&self) -> u32

Returns the current network tick.

The network tick from the last processed packet.

pub fn game_build(&self) -> u32

Returns the game build number.

Identifies the specific version of the game that created this replay.

pub fn replay_info(&self) -> &CDemoFileInfo

Returns replay file metadata.

Contains information about the replay including duration, map, and game info.

Trait Implementations

impl Default for Context

fn default() -> Self

Returns the “default value” for a type.

impl Display for Context

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.