SDL2-Game

A small 2D, SDL2 Game written in C++ featuring destructive terrain, raycasts, tailphysics and more!

This is what it looks like: https://www.youtube.com/watch?v=upb3DJJbQIM

Only dependencies are the SDL2 and SDL2-image libraries. See here.

All code was written by me and is public domain.

Controls

• WASD to move the player
• LMB to fire a projectile that destroys terrain
• RMB to create terrain

Healthbars and AI are missing, so you will have to control the boss/enemy yourself:

• 1 for the Boss to shoot his laser
• 2 for the Boss to shoot his rockets
• 3 to toggle a continous rain of rockets

Sources for Artwork:

• Projectiles: http://millionthvector.blogspot.de/p/free-sprites.html
• Fire animation: https://opengameart.org/content/wgstudio-fire-animation-loop
• Explosion animation: https://opengameart.org/content/explosion
• Metal Structure: https://opengameart.org/content/metal-grate-texture
• Metal Supports: https://opengameart.org/content/brown-metal-trim (And similar from the same author)
• Laser Flare: http://www.photos-public-domain.com/2011/11/19/bright-sun/
• Destructible Rock texture: textures.com
• Everything Else: Myself

Documentation:

Root directory

The root directory contains what you might consider to be the 'game engine':

• defs.h: All constant values used across other files, including file directories, window size etc.
• random.h: Inline header file to generate random numbers.
• main.cpp: Runs the start-method in gamemaster.cpp. That's all.
• gamemaster.cpp/.h: Contains the base 'game-loop'. Continously clears, draws and updates all relevant objects.
• base.cpp/.h: Fundamental classes/functions used and inherited throughout the project. This includes: Timer, Vector2, Camera, GameWindow, Object, Image, AdvImage. Object being the base class for all Objects drawn on screen.

Assets directory

Includes more specialized files. All of these inherit from either the Object or Image class.

• animation: Class for a spritesheet-animation. Used by explosion or fire aniamtions, aswells as the player sprite.
• background: Parallax background image that scrolls relative to player position and level size.
• terrain: Actual level. Pixel collision and destructible terrain are handled here.
• missile: The missiles that the boss spawns on his second attack.
• physicsObj: Base class for all physics-based Objects.
• player: The player.
• projectile: Base class for physics-based projectiles.

assets/NAV directory

Point- and Path-classes used for the Navigation of the Boss. Paths can have ease-in/-out aswell as linear, bezier or sine-curve interpolations. nav_graph creates and includes preset paths for the boss to navigate along.

assets/BOSS directory

All classes concerning the boss.

• boss_AI: Main wrapper for the entire thing. Looks at what attack the boss is doing and executes it by calling boss_Controller methods.
• boss_Controller: Handles boss idle animations, laser animations etc. Second layer of complexity wrapping.
• boss_Head: The main bulk of the boss' head.
• boss_TailSegment: The small segments that constitute the boss' tail. Each segment has an angular and positional velocity aswell as an angular and positional acceleration. At a certain self-positonal-velocity the segments will accelerate towards the vector of said velocity. If this velocity is smaller than the given threshhold, the segments will accelerate towards their default position.
• boss_TailSegmentConnector: The red connectors between segments.

Certain elements are heavily inspired by the Supreme Jeh'Oul bossfight from Wings of Vi (this one).