Galaxy

A 2D game inspired by Gem Swap and Space Invaders, Galaxy features an UFO avatar navigating through a grid of asteroids. The UFO avatar is trailed by a small goldfish (non-aggro) and can shoot other objects, create mini black holes, etc.

Preview

The following shows some of the implementations in action

Black hole	Explosion

Controls

• WASD to move
• SPACEBAR to shoot a projectile directly upwards
• B to spawn a black hole
• Q to instigate a violent quake
• HOLD MOUSE to shoot constant stream of fireballs

Features

1. Grid - displays a n*n grid of asteroids (semi-transparent textured quads with different images).
2. Quake - the visible window shakes violently accordingly to a high-freq sin function of time. During the quake, in every frame, all asteroids stand a 0.1% chance of disappearing.
3. Dramatic exit - when asteroids disappearing due to Quake, they do so by quickly, but gradually shrinking to zero size, while rotating.
4. Rocket science - movement is according to acceleration instead of constant speed.
5. Shoot 'em up - when projectiles collide with other objects or fly a certain distance away from the avatar, they disappear. There is a cooldown time of ~2 seconds per shot.
6. Path animation - some enemies move along parametric curves.
7. Seeker - some enemies are constantly accelerated towards the avatar.
8. BOOM! - when collision occurs, animated explosion is displayed using a semi-transparent quad, its texture including sprites of all movement phases, and the vertex shader adjusting texture coordinates to show the proper phase, received as a uniform parameter.
9. Flamethrower - fired towards the location of the mouse.
10. Black holes - attract other objects according to the Law of Gravitation.

Libraries

• OpenGL
• GLUT

Note

To render each texture properly, must hardcode the paths of each image file.