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## How to use rawequal (value1, value2) to find the same coordinates and change the position of an object? Started by srzhnv Jun 06 2018 08:30 AM

2 replies to this topic
rawequal

Best Answer StarCrunch , 06 June 2018 - 08:46 AM

Hi.

rawequal is meant for something else; it ignores certain metamethods and checks if the "raw" objects are the same / different. (Maybe the particular object should be skipped, say, or the metamethod has a side effect.)

I suspect you're dealing with coordinates that are almost, but not quite, the same. In that case, use a tolerance:

```local function positionCheck ()

if (math.abs(object1.x - object2.x) < .005 then -- close enough?

transition.to (object1, {time=1500, x = object1.x - 50})

transition.to (object2, {time=1500, x = object2.x + 50})

end

end
```

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#1

### srzhnv

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srzhnv
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• 10 posts
• Corona SDK

Something like this:

local object1 = display.newRect(100, 100, 50, 50)   --means object1.x = 100

local object2 = display.newRect(200, 100, 50, 50)   --means object2.x = 200

--During the objects dragging:

local function positionCheck ()

if (rawequal (object1.x, object2.x) then

transition.to (object1, {time=1500, x = object1.x - 50})

transition.to (object2, {time=1500, x = object2.x + 50})

end

end

In common, is it possible whithout "physics" library?
Thank you for some words to clarify it.

Yuriy

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#2

### StarCrunch

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StarCrunch
• Contributor

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• Corona SDK

Hi.

rawequal is meant for something else; it ignores certain metamethods and checks if the "raw" objects are the same / different. (Maybe the particular object should be skipped, say, or the metamethod has a side effect.)

I suspect you're dealing with coordinates that are almost, but not quite, the same. In that case, use a tolerance:

```local function positionCheck ()

if (math.abs(object1.x - object2.x) < .005 then -- close enough?

transition.to (object1, {time=1500, x = object1.x - 50})

transition.to (object2, {time=1500, x = object2.x + 50})

end

end
```

• roaminggamer and srzhnv like this

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#3

### srzhnv

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srzhnv
• Observer

• 10 posts
• Corona SDK

Thank you, StarCrunch!

• StarCrunch likes this

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