motion_predict
- motion_predict(instance,steps)
- Returns a list data structure populated with the predicted positions {x1,y1, x2,y2, ... , xsteps,ysteps} of an instance with regard to its current motion, friction, and gravity.
COPY/// motion_predict(instance,steps)
//
// Returns a list data structure populated with the predicted
// positions {x1,y1, x2,y2, ... , xsteps,ysteps} of an instance
// with regard to its current motion, friction, and gravity.
//
// instance instance id, real
// steps number of steps to look ahead, real
//
/// GMLscripts.com/license
{
var instance,steps,dsid,posx,posy,hspd,vspd,grvx,grvy,spd,dir;
instance = argument0;
steps = argument1;
dsid = ds_list_create();
with (instance) {
posx = x;
posy = y;
hspd = hspeed;
vspd = vspeed;
grvx = lengthdir_x(gravity,gravity_direction);
grvy = lengthdir_y(gravity,gravity_direction);
repeat (steps) {
spd = point_distance(0,0,hspd,vspd);
spd = max(0, spd-friction)/spd;
hspd *= spd;
vspd *= spd;
hspd += grvx;
vspd += grvy;
posx += hspd;
posy += vspd;
ds_list_add(dsid,posx);
ds_list_add(dsid,posy);
}
}
return dsid;
}
Contributors: xot, Tepi
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