Detect when an object is inside another.

Solar2D General Questions/Discussion
#1

I’m trying to achieve something which I am not sure is possible. I would like to check if an object is completely inside another object (basically another image) and not just touching at the edges slightly. Maybe it’s easier than I thought.

I appreciate the help.

Cheers.

#2

Hey dip,

are the objects rotated or not?

If not, you can use this function to check if one rectangle is inside another one.

--[[-------------------------------------------------------------------------------------------------------- Estimates if one rectangle (R1) with the center point R and a given width and height is completly inside another rectangle (R2) @param R1x, R1y - x and y cordinates of the first rects center point @param R1w, R1h - width and height of the first rect @param R2x, R2y - x and y cordinates of the second rects center point @param R2w, R2h - width and height of the second rect @return - true, if the first rect is completly inside the second one ----------------------------------------------------------------------------------------------------------]] local function rectInRect(R1x, R1y, R1w, R2h, R2x, R2y, R2w, R2h) R1x, R1y = R1x - R1w\*0.5, R1y - R1h\*0.5 return (R1x \>= R2x and R1y \>= R2y and R1x + R1w \<= R2x + R2w and R1y + R1h \<= R2y + R2h) end
#3

Wrong, very wrong sub-forum you are in.

#4

@bgmadclown - Yes you are right, I normally don’t post threads here and don’t know why I did. Sorry for the mistake.

@torbenratzlaff - Thanks for the help, That is perfect to get going.

#5

Moving to General

#6

Hey dip,

are the objects rotated or not?

If not, you can use this function to check if one rectangle is inside another one.

--[[-------------------------------------------------------------------------------------------------------- Estimates if one rectangle (R1) with the center point R and a given width and height is completly inside another rectangle (R2) @param R1x, R1y - x and y cordinates of the first rects center point @param R1w, R1h - width and height of the first rect @param R2x, R2y - x and y cordinates of the second rects center point @param R2w, R2h - width and height of the second rect @return - true, if the first rect is completly inside the second one ----------------------------------------------------------------------------------------------------------]] local function rectInRect(R1x, R1y, R1w, R2h, R2x, R2y, R2w, R2h) R1x, R1y = R1x - R1w\*0.5, R1y - R1h\*0.5 return (R1x \>= R2x and R1y \>= R2y and R1x + R1w \<= R2x + R2w and R1y + R1h \<= R2y + R2h) end
#7

Wrong, very wrong sub-forum you are in.

#8

@bgmadclown - Yes you are right, I normally don’t post threads here and don’t know why I did. Sorry for the mistake.

@torbenratzlaff - Thanks for the help, That is perfect to get going.

#9

Moving to General