GameMaker point_in_rectangle() problem, it doesn't work

[Turkish Coffee]

Hey,

I'm trying to get buttons with the code below but it doesn't work, I really can't see what is the problem.

Draw Event

Spoiler

draw_rectangle(x-sprite_width/2,y,x+sprite_width/2,y-sprite_height,true);
if (drawTheShop == true)
 {
  //code here...
 }
draw_circle(mouse_x,mouse_y,6,true);

Step Event

Spoiler

if (point_in_rectangle(mouse_x,mouse_y,x-sprite_width/2,y,x+sprite_width/2,y-sprite_height))
{
 if (mouse_check_button_pressed(mb_left))
 {
  drawTheShop = true;
  image_index++;
  if (FoundryLevel < 3)
   {
     FoundryLevel++;   
   } else {FoundryLevel = 1;}
 }
}

I've checked if theres something special about the function in manual but no..

Spoiler

When using this function, you define a rectangular area and GameMaker Studio 2 will work out whether the given point falls within its bounds or not. If the point falls within the defined rectangle the function will return true otherwise the function will return false.

 

[vdweller]

Try exchanging y and y-sprite_height

 

[Turkish Coffee]

@vdweller I want it to create a rectangle area that can be clicked, and its drawn with a draw_rectangle above, why am I going to change those?

 

[vdweller]

@vdweller I want it to create a rectangle area that can be clicked, and its drawn with a draw_rectangle above, why am I going to change those?

I didn't say change, I said exchange. In the point_in_rectangle script, put the smaller coordinate (y-sprite_height) in y1 and the bigger one (y) in y2.

 

[ophelius]

if (point_in_rectangle(mouse_x,mouse_y, x-sprite_width/2, y-sprite_height/2, x+sprite_width/2, y+sprite_height/2))

 

[Turkish Coffee]

@vdweller Oh, its my English then. It works but why? And why theres no explanation about this on manual I wonder.

 

[vdweller]

A naive (but also fast) approach for checking if a point is within a rectangle is usually (internally) implemented as

return (px>=x1 && px<=x2 && py>=y1 && py<=y2)

You can easily see by replacing your initial code that this won't evaluate to true. So in general your x2 and y2 coordinates should be bigger than the x1 and y1 respectively. So think of x1,y1 as the "top-left" corner of your rectangle and x2,y2 as the "bottom-right" one.

EDIT: Manual actually mentions this in detail:

px	The x coordinate of the point to check.
py	The y coordinate of the point to check.
x1	The x coordinate of the left side of the rectangle to check.
y1	The y coordinate of the top side of the rectangle to check.
x2	The x coordinate of the right side of the rectangle to check.
y2	The y coordinate of the bottom side of the rectangle to check.

 

[Turkish Coffee]

@vdweller Ah, I see, thanks a lot for clearing it out for me! Shouldn't that be in the Description of the function?