Help! Drawing sync

Posted by Honey_badger

If a player creates a sprite by drawing (draw_sprite_ext command), how can I make it so that other players see it? Nothing is displayed on their screen (I use surface)

Replies (5)

When is the sprite drawn? For example, if it is only drawn under a certain condition, you could add the same check to the other player object and also draw the sprite there. If it depends on something else, you might have to sync a variable (see gms_self_set, gms_other_get) and use that variable to determine whether you draw the sprite in the other player object or not.

I tried these 2 methods, it does not work.
I created an object o_surf and wrote it in the End Step:

surface_set_target(surf);
draw_set_blend_mode_ext(bm_src_color,bm_one);
draw_clear_alpha(c_black,0.75);
if (lighter2 == true)
{
draw_set_blend_mode(bm_subtract);
globalvar ightt;
svett = draw_sprite_ext(spr_lightf,-1,obj_player.x,obj_player.y,1,1,obj_player.image_angle,c_white,0.6);
gms_self_set('svett', svett);
}
draw_set_blend_mode(bm_normal);
surface_reset_target();

That is, I made the room dark. I need to make it so that if someone activates a sprite for lighting, then it should be displayed for all players.

This is a switch in the same object that is activated by the key.

In that case, it sounds like you might want to sync a global variable. I'm assuming the 'lighter2' variable is the variable that decides whether to draw the thing or not. Then you can use gms_global_set to sync the value, and gms_global_get to read the current value. Something like:

// Initialization somewhere (room start? game start?)
gms_global_set('lighter2', false);
// Activating the light
gms_global_set('lighter2', true);
// o_surf, end step:
surface_set_target(surf);
draw_set_blend_mode_ext(bm_src_color,bm_one);
draw_clear_alpha(c_black,0.75);
if (gms_global_get('lighter2') == true)
{
draw_set_blend_mode(bm_subtract);
draw_sprite_ext(spr_lightf,-1,obj_player.x,obj_player.y,1,1,obj_player.image_angle,c_white,0.6);
}
draw_set_blend_mode(bm_normal);
surface_reset_target();

I see now that the light is following the player. Do you want every player to have a separate light? In that case, the code would be more like this:

// Initialization in obj_player create event
gms_self_set('lighter2', false);
// Activating the light
gms_self_set('lighter2', true);
// o_surf, end step:
surface_set_target(surf);
draw_set_blend_mode_ext(bm_src_color,bm_one);
draw_clear_alpha(c_black,0.75);
if (gms_self_get('lighter2') == true)
{
    draw_set_blend_mode(bm_subtract);
    draw_sprite_ext(spr_lightf,-1,obj_player.x,obj_player.y,1,1,obj_player.image_angle,c_white,0.6);
}
with obj_other_player
{
    if (gms_other_get(player_id, 'lighter2') == true)
    {
        draw_set_blend_mode(bm_subtract);
        draw_sprite_ext(spr_lightf,-1,x,y,1,1,image_angle,c_white,0.6);
    }
}
draw_set_blend_mode(bm_normal);
surface_reset_target();

This will do the drawing for all players that have activated their light.

It works now, thanks!