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Introduction to Decker: Your First Interactive Creation

Welcome to the world of Decker! If you've ever been curious about creating your own interactive stories, games, or multimedia projects, but felt intimidated by complex programming languages, Decker might be the perfect tool for you. In this article, we'll introduce you to Decker, explore its philosophy, and guide you through creating your very first interactive deck.

What is Decker?

Decker is a unique multimedia platform designed for creating and sharing interactive documents. It draws significant inspiration from classic tools like Apple's HyperCard, offering a nostalgic yet powerful environment for creative expression. Imagine a digital stack of index cards, where each card can contain text, images, and even interactive elements. That's the essence of Decker.

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Calculating Geographic Distances: The Haversine Formula in TypeScript

Introduction

When building location-based applications, one of the most common requirements is calculating the distance between two points on Earth. While it might seem straightforward at first, accurately calculating distances on a spherical surface requires some careful consideration. In this article, I'll share how I implemented this calculation for an educational geography game, Flagle Explorer.

The Challenge

The primary requirements for our distance calculation were:

1. Accuracy suitable for educational purposes

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RGB Color Mixing Algorithm: A Mathematical Approach to Digital Color Blending

Color mixing in digital space is fundamentally different from mixing physical pigments. While artists blend paints using subtractive color mixing, digital displays use additive color mixing with RGB values. This implementation demonstrates a precise mathematical approach to mixing RGB colors with specific proportions.

The Algorithm

Here's a TypeScript implementation that handles proportional color mixing:

typescript