Scene Rendering
Purpose: grad-level Computer Science graphics course, Purdue UniversityLanguage and Implemented APIs: C++ with OpenGL , GLUT and GLUI
Description: A made-from-scratch 3D scene renderer that covers all the basics of the graphics pipeline using OpenGL, including transformation, texturing, rasterization and lighting. Scene data is loaded from a user-specified text file. Excruciatingly detailed (but a little difficult) controls are provided for the camera viewpoint, 8 lights (the max in OpenGL), and global reflection and shading parameters.
Notes:When you first load a scene, you'll be smack in the middle of it; you may want to back up a little to get a good look. To do so, just increase the camera position's Z value.
Odd quirk: depending on your hardware, OpenGL's diffuse/specular lighting components may flicker or fail. This little guy is definitely a work in progress, but he can do some pretty fun things!
Fun trick film noir effect: turn on 'Full Lighting', and use one light with a maxed out Diffuse component and no Ambient or Specular light. Rotate the light around to see the starkly lit scene fade into black.
A simple test box with one textured face and three lights
Crazy pipe scene, displaying the effect of surface angle on lighting(model provided)
A quaint house scene, complete with ugly furniture(model provided)
'And we're walkin, we're walkin... to your right, you'll see a wonderf--''Aaahh! get out of my bathroom!'
(model provided)
Cubic Bezier Curve Creator
Purpose: Computer Science course in graphics, Purdue UniversityLanguage and Implemented APIs: C++ with OpenGL , GLUT and GLUI
Description: Draws nice little swoopy contours based on the equations of Bézier Curves . Using the parametric form, it 'walks' along the line little by little, following the influences of the control cage. The interface works much like common vector drawing programs such as Adobe Illustrator; create and reposition points, and drag tangent lines out to form the curve.
Notes:- Start by creating some control points.
To create curve tangents, use 'Set Tangents' mode and click and drag on the control points.
It's easier to adjust your existing tangents in the last mode, 'Move Control Points;' 'Set Tangents' is just for creating new ones.
Cubic Bezier Curve Creator wants to be your friend :)
Sad Control Points, before the Tangents are set :(
Happy Control Points with Tangents visible :D
With the full Control Cage visible
Particle Physics Engine
Purpose: Computer Science course in graphics, Purdue UniversityLanguage and Implemented APIs: C++ with OpenGL , GLUT and GLUI
Description: This is so fun to play with! It models simple particles as they collide and bounce, based on Newton's Laws of Motion . The particles are launched in random trajectories out of a cone in the middle of the scene. Each time particles collide with each other or a wall, they flash red for an instant. Seems simple, right? Try adjusting the physics in 7 different ways, and things start to get interesting. You can adjust the particle size, how they are launched, and the scene's gravity. But my favorite is adjusting the collision elasticity (the amount of energy lost in each bounce), with results ranging from ricocheting golf balls to sticky blobs of play-dough.
Notes:Don't mind the revolving light source floating in the sky. He's just there to give the stuff pretty shadows.
If too many particles build up in the scene (or float off into outer space!) things might start to get laggy. Just hit the 'Clear' button if that happens.
The scene, with plain old default options
The Firehose: a continuous stream that follows your every moveParticles: Rate = Max, Size = Max, Randomness = Min
Gravity: Direction = Camera Down, Scale = 2
Energy Loss = .1, Collision = Off
Click and drag to move the camera around
The Tower: a popping corn-cob explodes into lifeParticles: Rate = Max, Size = Max, Randomness = Min
Gravity: Direction = World Down, Scale = .8
Turn collision off, click Clear, and then wait a few seconds before turning it back on. Vary the Energy Loss value for gooey/explosive effects!
The Spout: random collision events cause chain reactions to shoot through the columnParticles: Rate = 19.75, Size = .05, Randomness = Min
Gravity: Direction = World Down, Scale = 0
Energy Loss = .1, Collision = On
If a coherent stream won't reform, just click Clear. If you're lucky, you can get two distinct jets to form for a moment. Try Size = ~.0475 and Gravity Scale = ~.01 to light the fuse!
