SDL 2.0
SDL_HapticPeriodic Struct Reference

#include <SDL_haptic.h>

+ Collaboration diagram for SDL_HapticPeriodic:

Data Fields

Uint16 type
 
SDL_HapticDirection direction
 
Uint32 length
 
Uint16 delay
 
Uint16 button
 
Uint16 interval
 
Uint16 period
 
Sint16 magnitude
 
Sint16 offset
 
Uint16 phase
 
Uint16 attack_length
 
Uint16 attack_level
 
Uint16 fade_length
 
Uint16 fade_level
 

Detailed Description

A structure containing a template for a Periodic effect.

The struct handles the following effects:

  • SDL_HAPTIC_SINE
  • SDL_HAPTIC_SQUARE
  • SDL_HAPTIC_TRIANGLE
  • SDL_HAPTIC_SAWTOOTHUP
  • SDL_HAPTIC_SAWTOOTHDOWN

A periodic effect consists in a wave-shaped effect that repeats itself over time. The type determines the shape of the wave and the parameters determine the dimensions of the wave.

Phase is given by hundredth of a degree meaning that giving the phase a value of 9000 will displace it 25% of its period. Here are sample values:

  • 0: No phase displacement.
  • 9000: Displaced 25% of its period.
  • 18000: Displaced 50% of its period.
  • 27000: Displaced 75% of its period.
  • 36000: Displaced 100% of its period, same as 0, but 0 is preferred.

Examples:

__ __ __ __
/ \ / \ / \ /
/ \__/ \__/ \__/
SDL_HAPTIC_SQUARE
__ __ __ __ __
| | | | | | | | | |
| |__| |__| |__| |__| |
/\ /\ /\ /\ /\
/ \ / \ / \ / \ /
/ \/ \/ \/ \/
/| /| /| /| /| /| /|
/ | / | / | / | / | / | / |
/ |/ |/ |/ |/ |/ |/ |
\ |\ |\ |\ |\ |\ |\ |
\ | \ | \ | \ | \ | \ | \ |
\| \| \| \| \| \| \|
#define SDL_HAPTIC_SINE
Definition SDL_haptic.h:174
#define SDL_HAPTIC_SAWTOOTHUP
Definition SDL_haptic.h:204
#define SDL_HAPTIC_TRIANGLE
Definition SDL_haptic.h:195
#define SDL_HAPTIC_SAWTOOTHDOWN
Definition SDL_haptic.h:213
See also
SDL_HAPTIC_SINE
SDL_HAPTIC_LEFTRIGHT
SDL_HAPTIC_TRIANGLE
SDL_HAPTIC_SAWTOOTHUP
SDL_HAPTIC_SAWTOOTHDOWN
SDL_HapticEffect

Definition at line 568 of file SDL_haptic.h.

Field Documentation

◆ attack_length

Uint16 SDL_HapticPeriodic::attack_length

Duration of the attack.

Definition at line 591 of file SDL_haptic.h.

◆ attack_level

Uint16 SDL_HapticPeriodic::attack_level

Level at the start of the attack.

Definition at line 592 of file SDL_haptic.h.

◆ button

Uint16 SDL_HapticPeriodic::button

Button that triggers the effect.

Definition at line 581 of file SDL_haptic.h.

◆ delay

Uint16 SDL_HapticPeriodic::delay

Delay before starting the effect.

Definition at line 578 of file SDL_haptic.h.

◆ direction

SDL_HapticDirection SDL_HapticPeriodic::direction

Direction of the effect.

Definition at line 574 of file SDL_haptic.h.

◆ fade_length

Uint16 SDL_HapticPeriodic::fade_length

Duration of the fade.

Definition at line 593 of file SDL_haptic.h.

◆ fade_level

Uint16 SDL_HapticPeriodic::fade_level

Level at the end of the fade.

Definition at line 594 of file SDL_haptic.h.

◆ interval

Uint16 SDL_HapticPeriodic::interval

How soon it can be triggered again after button.

Definition at line 582 of file SDL_haptic.h.

◆ length

Uint32 SDL_HapticPeriodic::length

Duration of the effect.

Definition at line 577 of file SDL_haptic.h.

◆ magnitude

Sint16 SDL_HapticPeriodic::magnitude

Peak value; if negative, equivalent to 180 degrees extra phase shift.

Definition at line 586 of file SDL_haptic.h.

◆ offset

Sint16 SDL_HapticPeriodic::offset

Mean value of the wave.

Definition at line 587 of file SDL_haptic.h.

◆ period

Uint16 SDL_HapticPeriodic::period

Period of the wave.

Definition at line 585 of file SDL_haptic.h.

◆ phase

Uint16 SDL_HapticPeriodic::phase

Positive phase shift given by hundredth of a degree.

Definition at line 588 of file SDL_haptic.h.

◆ type

Uint16 SDL_HapticPeriodic::type

SDL_HAPTIC_SINE, SDL_HAPTIC_LEFTRIGHT, SDL_HAPTIC_TRIANGLE, SDL_HAPTIC_SAWTOOTHUP or SDL_HAPTIC_SAWTOOTHDOWN

Definition at line 571 of file SDL_haptic.h.


The documentation for this struct was generated from the following file: