Functions
void	lg_get_motion_and_shot_from_touchscreen (int sprite_x, int sprite_y, int motion_x, int motion_y, int zone_side, zboolean *shot)

void	lg_wait_for_finger_down (float x, float y)

void	lg_wait_for_finger_motion (float dx, float dy)

zboolean	lg_get_finger_position (zboolean down_flag, float x, float y)

zboolean	lg_get_finger_state_and_pos (float x, float y)

zboolean	lg_get_finger_motion (float dx, float dy)

lg_finger_down_loc	lg_get_finger_down_loc ()

lg_finger_down_loc	lg_finger_loc_from_pos (float x, float y)

unsigned long	lg_return_finger_down_code_push_back_event ()

void	lg_flush_touch_events ()

Detailed Description

Touchscreen event types:

SDL_FINGERMOTION
SDL_FINGERDOWN
SDL_FINGERUP

Touchscreen events always happen in down/motion/up sequences

VARO: SDL y axis goes down, whereas OpenGL y axis goes up

TODO: complete the doc

Function Documentation

◆ lg_get_motion_and_shot_from_touchscreen()

void lg_get_motion_and_shot_from_touchscreen	(	int	sprite_x,
		int	sprite_y,
		int *	motion_x,
		int *	motion_y,
		int	zone_side,
		zboolean *	shot
	)

Touch in top-left zone = shot motion_x = 0 / +1 / -1, motion_y = 0 / +1 / -1, shot = TRUE/FALSE,

◆ lg_wait_for_finger_down()

void lg_wait_for_finger_down	(	float *	x,
		float *	y
	)

Wait for finger down and set x and y (location) in range [0.0, 1.0] (set *x if x != NULL and set *y if y != NULL)

◆ lg_wait_for_finger_motion()

void lg_wait_for_finger_motion	(	float *	dx,
		float *	dy
	)

Wait for finger motion and set dx and dy in range [-1.0, 1.0] (set *dx if dx != NULL and set *dy if dy != NULL)

◆ lg_get_finger_position()

zboolean lg_get_finger_position	(	zboolean	down_flag,
		float *	x,
		float *	y
	)

Return TRUE if finger down (or finger up if down_flag = FALSE) detected, FALSE otherwise - Non-blocking If down (or up), set x and y in range [0.0, 1.0] (set *x if x != NULL and set *y if y != NULL)

◆ lg_get_finger_state_and_pos()

zboolean lg_get_finger_state_and_pos	(	float *	x,
		float *	y
	)

If finger down happened, and no finger up has happened yet, set x and y in range [0.0, 1.0], then return TRUE (set *x if x != NULL and set *y if y != NULL) - Non-blocking Return FALSE otherwise

◆ lg_get_finger_motion()

zboolean lg_get_finger_motion	(	float *	dx,
		float *	dy
	)

Return TRUE if finger motion detected, FALSE otherwise - Non-blocking If motion, set dx and dy in range [-1.0, 1.0] (set *dx if dx != NULL and set *dy if dy != NULL)

◆ lg_get_finger_down_loc()

lg_finger_down_loc lg_get_finger_down_loc ( )

Return left, h_center, right, top, v_center, bottom, or none - Non-blocking

◆ lg_finger_loc_from_pos()

lg_finger_down_loc lg_finger_loc_from_pos	(	float	x,
		float	y
	)

Return left, h_center, right, top, v_center, bottom, or none

◆ lg_return_finger_down_code_push_back_event()

unsigned long lg_return_finger_down_code_push_back_event ( )

0 means no finger down - Push back event in the queue so that it can be read again

◆ lg_flush_touch_events()

void lg_flush_touch_events ( )

Flush touch events

Functions