Connect 4 Game Programming Course for Unity 3D

Drag the playfield into the hierarchy, build a 7x7 grid of cubes with zero-based row and column indices for coin drops, and use orthographic view for precise placement.

Set the start point as the origin (000) in the top-left grid corner, using a cube marker and precise snapping to align its transform for future coin drops without gravity.

Create a Unity play field script that initializes a 6x7 two-dimensional int board, with zeros for empty and ones and twos for players, and map clicks to coordinates.

Implement a drop coin function for a Unity connect four board, iterating bottom-up to find the first empty slot, place the current player's coin, and return move validity.

Create a debug function that prints the connect four board to the console by building a string with borders, separators, and nested loops, then test drops.

Learn to validate a connect four board in Unity by debugging the drop coin logic, preventing moves in full rows or columns, and guarding against out-of-bounds indices with validity checks.

Learn how the game manager orchestrates turns and coin drops in a Unity 3D Connect 4 game, using singleton access and awake initialization to coordinate the play field.

Create a column input script for each collider that detects left mouse or touch input, calls the game manager's column pressed function, and highlights the column on hover.

Learn to implement coin dropping in a Unity 3D Connect Four game by finding the next free row in a column, validating moves, and updating the board.

Instantiate a red or yellow coin for the current player, drop it into the chosen column, and move it toward a calculated goal position using a coroutine for timed motion.

Protect the core coin drop routine with an active turn flag, instantiate and position coins via a play coin routine using row and column, then switch the player.

Create a switch player function in the game manager to toggle the current player between 1 and 2 using a ternary expression, then test by dropping red and yellow coins.

Develop and implement the horizontal win check by iterating valid start points across the grid, verifying four matching pieces in a row for either player.

Implement a horizontal win check for a connect 4 game in Unity, returning true on four in a row, and prepare vertical and diagonal checks with testing in awake.

Explain the vertical win check by iterating columns from top to bottom within bounds, using max columns minus one, and applying the same loop logic as the horizontal check.

explore coding the vertical win in a connect 4 game for Unity 3D, iterating rows then columns, verifying nonzero board entries, and applying horizontal, vertical, and diagonal win checks.

Implement the diagonal check for connect 4, scanning left-to-right and right-to-left by incrementing or decrementing rows and columns within bounds.

Code the diagonal win check for Connect 4 in Unity 3D, implementing left-to-right and right-to-left diagonals, validating non-empty cells, updating indices, and detecting the winner.

Implement a win condition by evaluating horizontal, vertical, and diagonal checks and returning true when a winner emerges, then notify the game manager and update the UI.

Design and polish the Connect 4 playfield in Unity 3D by adding a textured desk plate, aligning coins visuals, adjusting the camera, skybox, and background, and displaying the current player.

Build an info box in Unity that overlays the scene to show the current turn and later the winner. Learn to configure a canvas, overlay, and scalable text elements.

Create and wire an info box in unity by writing a public info box script that updates on-screen text, implements a singleton, and displays turn messages and game over notices.

Explore the minimax algorithm for a Connect 4 AI, learning how to evaluate board states, handle depth and branching, and compare random versus smart play with nega max.

Implement a minimax AI for Connect 4 in Unity 3D by creating singleton IMove API, Move class with column, row, and score, and a seven-by-six board with depth two.

Compute all valid moves from the current 2d board by scanning each column bottom-up, creating move objects, populating a move list, and returning it.

Create a public best move function that validates all possible moves on the current connect 4 board, copies the current play field, and gathers valid moves for AI.

Learn the first steps of the minimax algorithm for connect four: loop through possible moves, initialize scores to negative infinity, and test temporary boards for the AI’s best move.

Implement the minimax algorithm to evaluate moves on a Connect 4 board in Unity 3D. Return a float score and handle depth, maximizing and minimizing players, and terminal states.

Implement minimax with maximizing and minimizing branches, initialize scores with infinities, evaluate each possible move on a temporary board, recursively call minimax for the next player, and return the score.

Implement the minimax-based best move function in connect four, initialize scores, evaluate seven possible moves, and trigger the AI to play the optimal column via the game manager.

This lecture covers a board evaluation for connect four in Unity 3D, using a 2D int array for the board and score system for four-in-a-row with maximizing and minimizing players.

Explore horizontal evaluation for Connect 4 in Unity: implement a floating score-based evaluator that checks horizontal, vertical, and diagonal lines, using a maximizer/minimizer setup and left-to-right and right-to-left scans.

Finalize the horizontal evaluation in the minimax AI, update the board score with horizontal track, pass the current board and is maximizer, and test blocking moves.

Finalize horizontal checks by removing the debug board and verify that a depth-two search allows the maximizer or minimizer to block threats to four-in-a-row and three-in-a-row.

Develop vertical evaluation for the Connect 4 game by reusing horizontal check logic, counting vertical sequences, validating row bounds, and updating the board score based on the current state.

Explore diagonal evaluation for a Unity 3D connect 4 game, covering all diagonal directions and their traversal, and compute a board score to guide the search.

Learn how alpha-beta pruning enhances the minimax algorithm in a connect 4 AI, using alpha and beta to cut off unworthy branches, improving efficiency and reducing computation time.

Fix a bug in the base and best move in the connect four AI by introducing alpha-beta bounds and using the Move class to track row, column, and score.

Learn to create highlight circles that reveal the winning line in a connect 4 game by animating a sprite 2D UI fill on the canvas and instantiating prefabs.

Highlight circles illuminate a connect 4 win, calculate start points and vectors for rows, columns, diagonals, then instantiate and position prefabs on the canvas to show the win.

Create a new Unity menu scene to load play modes, using a background, UI canvas, and interactive buttons, with fonts and colors aligned to a connect four menu.

Build the connect four main menu in Unity using color-tinted buttons, panels, and images, explore 9-slice sprites, and wire play, play vs computer, and exit with hover effects.

Animate Unity menu buttons by using a runtime animator to drive hover transitions, with normal, highlighted, pressed, and disabled states and scene testing.

Learn to implement interactive 3D connect 4 UI in Unity by animating selection and hover states with a world-space canvas. Use an event camera and a rotating playfield preview.

Duplicate main menu panel to create a difficulty menu with easy, medium, hard options and a back button; link on-click events to activate the difficulty panel and deactivate main menu.

Visualize and configure explicit button navigation for the Connect 4 Unity UI, mapping up, down, left, and exit with none and explicit modes, and test with keyboard or controller.

Create a Unity menu handler to quit the game, load scenes, and set AI difficulty via static parameters; wire UI buttons to public functions and manage panels.

Create a static difficulty setting for a one versus one connect 4 game, wire it to the game manager, and enable ai moves only when difficulty is nonzero.

Learn to craft a polished game over panel in Unity 3D, including UI canvas setup, two action buttons (back to menu and restart), and scene management via a game manager.

Organize the win circles under a circles holder in the canvas and place the game over screen above them, then test by playing and restarting to release the first game.

Recaps building a Unity 3D connect four game, including a menu with scene loading and difficulty settings, drag-and-drop coin placement, and AI using minimax with alpha-beta pruning.