Sound operators

These are the root sound operators referenced in Portal 2. See scripts/sound_operator_stacks.txt and Soundscripts#Sound operators for more details.

Common properties

execute_once

Whether the operator should run every time the stack is evaluated, or only the first time. Output values are presumable stored between executions in the latter case.

input_execute

The operator will only run if this value is true (i.e. non-zero).

There is also one special command that is not an operator:

import_stack

Inserts another named stack into this one.

Operator list

System

Affect sound playback.

sys_stop_entries

Stops sounds from playing.

match_channel

Sound must have the same channel (e.g. CHAN_STATIC) to match

match_entity

Sound must be coming from the same entity as this one

match_entry

The sound entry name to look for

match_substring

Whether match_entry can be part of a larger string (e.g. "MyGun" matches MyGun.fire, MyGun.reload...).

input_max_entries

Confirm:The number of times this sound can be playing at once?

• sys_start_entry
• sys_block_entries
• sys_output
• sys_platform
• sys_mixlayer

Maths

Generate or process numbers.

math_random

Produces a random number. Access it with @MyRandom.output.

input_min

input_max

Range of values to output.

• math_float
• math_delta
• math_remap_float
• math_func1

Getters

Provide values from the engine.

• get_entry_time
• get_sys_time
• get_source_info
• get_soundmixer
• get_convar
• get_dashboard
• get_map_name

Calculations

Calculate pre-set algorithms.

• calc_angles_facing
• calc_distant_dsp
• calc_occlusion
• calc_falloff
• calc_source_distance
• calc_spatialize_speakers

Other

• util_pos_vec8
• util_print_float
• game_view_info
• op_accumulate_ss_float