====== (This is the legacy documentation for stable SDL2, the current stable version; [https://wiki.libsdl.org/SDL3/ SDL3] is the current development version.) ======

== Draft ==

'''THIS PAGE IS A WORK IN PROGRESS''' ... Please make edits to this page to improve it!
= SDL_HapticConstant =

A structure containing a template for a Constant effect.

== Header File ==

Defined in [SDL_haptic.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_haptic.h), but apps should _only_ `#include "SDL.h"`!

== Syntax ==

<syntaxhighlight lang='c'>
typedef struct SDL_HapticConstant
{
    /* Header */
    Uint16 type;            /**< ::SDL_HAPTIC_CONSTANT */
    SDL_HapticDirection direction;  /**< Direction of the effect. */

    /* Replay */
    Uint32 length;          /**< Duration of the effect. */
    Uint16 delay;           /**< Delay before starting the effect. */

    /* Trigger */
    Uint16 button;          /**< Button that triggers the effect. */
    Uint16 interval;        /**< How soon it can be triggered again after button. */

    /* Constant */
    Sint16 level;           /**< Strength of the constant effect. */

    /* Envelope */
    Uint16 attack_length;   /**< Duration of the attack. */
    Uint16 attack_level;    /**< Level at the start of the attack. */
    Uint16 fade_length;     /**< Duration of the fade. */
    Uint16 fade_level;      /**< Level at the end of the fade. */
} SDL_HapticConstant;</syntaxhighlight>

== Remarks ==

This struct is exclusively for the ::[[SDL_HAPTIC_CONSTANT]] effect.

A constant effect applies a constant force in the specified direction to
the joystick.

== See Also ==

:[[SDL_HAPTIC_CONSTANT]]
:[[SDL_HapticEffect]]


== Data Fields ==

{|
|
|
|<bgcolor="#EDEDED">''Header''
|-
|Uint16
|'''type'''
|SDL_HAPTIC_CONSTANT
|-
|[[SDL_HapticDirection]]
|'''direction'''
|direction of the effect
|-
|
|
|<bgcolor="#EDEDED">''Replay''
|-
|Uint32
|'''length'''
|duration of the effect
|-
|Uint16
|'''delay'''
|delay before starting the effect
|-
|
|
|<bgcolor="#EDEDED">''Trigger''
|-
|Uint16
|'''button'''
|button that triggers the effect
|-
|Uint16
|'''interval'''
|how soon it can be triggered again after button
|-
|
|
|<bgcolor="#EDEDED">''Constant''
|-
|Sint16
|'''level'''
|strength of the constant effect
|-
|
|
|<bgcolor="#EDEDED">''Envelope''
|-
|Uint16
|'''attack_length'''
|duration of the attack
|-
|Uint16
|'''attack_level'''
|level at the start of the attack
|-
|Uint16
|'''fade_length'''
|duration of the fade
|-
|Uint16
|'''fade_level'''
|level at the end of the fade
|}

----
[[CategoryAPI]], [[CategoryAPIStruct]], [[CategoryStruct]], [[CategoryForceFeedback]], [[CategoryDraft]]