Plugin: SmallSceneryObject.removalPrice is incorrect for objects that refund on removal

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Operating System

Windows 10 x64

OpenRCT2 build

OpenRCT2, v0.4.11 (18d2b5e) provided by GitHub

Base game

RollerCoaster Tycoon 2, RollerCoaster Tycoon Classic

Area(s) with this issue?

This is a development issue

Describe the issue

Scenery objects with a negative removalPrice seem to return a wrong value when accessed through the plugin API, specifically they return positive values some power of two larger than the true value, almost like there is a signedness bug somewhere. For most objects this is 256, for other things like the most expensive thing I could find in a hurry (Mythological theming golden fleece) the error is 4096.

There's every chance that this is somehow user error as well, I'm very new to JS/TS.

Steps to reproduce

The code in question:

export function removalPriceBug(): void
{
    for (let y = 0; y < map.size.y; y++) {
        for (let x = 0; x < map.size.x; x++) {
            let tile = map.getTile(x, y);
            for (let i = 0; i < tile.numElements; i++) {
                let element = tile.getElement(i);
                if (element.type === 'small_scenery') {
                    let scenery = objectManager.getObject("small_scenery", element.object);
                    if (scenery.removalPrice != 0)
                    {
                        park.postMessage("item " + scenery.identifier + " has removal price: " + scenery.removalPrice);
                    }
                }
            }
        }
    }
}

This works fine for things with a positive removal cost.

Attachments

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