Arena Deck Helper Hearthstone Code Examples To

If the game runs in a more standard resolution like 1920 x 1080, we need to convert the location and size of the rectangle.

Hearthstone is a popular free-to-play card game by Blizzard Entertainment.

In the Arena mode, the player has to create a deck consisting of 30 cards.

The cards are picked one at a time, so there are 30 choices the player has to make.

Every choice consists of selecting one card out of three randomly selected cards.

Not every card that is presented, is equally good as the others.

New players, but even experienced players, dont always know which card has the most value.

This plugin helps the player to make a choice, by showing what other expert players think of the value of the presented cards.

The plugin tries to visually detect the arena heroes and card choices.

Detected cards are displayed alongside the value of the card, that is specified in ADWCTAs Arena Tier List.

It was written using C, because Hearthstone Deck Tracker uses it.

Arena Deck Helper Hearthstone Code Examples To

This article explains how the plugin works and provides code examples to implement your own image recognition algorithms based on perceptual hashing.

The rest of this article explains the technical details of the plugin.

The plugin doesnt use memory reading functions and it doesnt inject data or code into the Hearthstone process.

Two different images will result in two different hash numbers.

So we can use the hashing function to compare two images and find out how similar they are.

If we know the exact position of the visual elements we want to detect, and we know what the visual hashes of these elements should be, we can try to detect them.

This requires us to precompute all of the perceptual hashes that we want to detect.

The red rectangles indicate the location of the visual elements we want to detect.

These locations are defined in the code of the plugin and the visual hashes of the elements are precomputed and stored in a database.

The bottom rectangles represent the position and size of the heroes.

If the resolution is changed, we need to convert our stored locations to be compatible with the new resolution.