View Full Version : basic help getting started

04-30-2005, 01:46 AM
Hey guys i need help trying to do this excersize. I can make all the objects like spheres and stuff but what i really need help with is

HOW do i INTERACT with the user to do these things??

PLEASE help ive been searching and cant find anything for the past 7.3234 hours

Letís say you use glortho(-5, 5, -5, 5, -5, 5). Build an interactive graphics modeling, rendering,
and animation system that includes at least the following functions on command line or
GUI control:
1. it accepts the following commands interactively to construct objects:
sph radius (depth) // create-draw a sphere object, depth is an option
// here object is an id you give to this created sph
cone radius height (depth) // depth is an option with default=3
cyl radius height (depth) // cylinder
tri x0 y0 z0 x1 y1 z1 x2 y2 z2 // triangle

2. it manipulates objects by the following commands:
sel object // select the object for operation
unsel object // operations will not affect the unselected object
del object // remove the object from the data structure
// you can use mouse to select or unselect directly
trans x y z // translate all the selected objects
rot angle x y z
scale x y z
// you can use sliderbars for transformation

3. it draws object(s) with the following rendering commands:
color r g b // set the current foreground color
bgcolor r g b // set the background color
wire // change the selected objects into wireframe
solid // change the selected objects into solid

4. it renders objects with the following shading commands:
lp x y z w // light source position-orientation
la r g b // light source ambient component
ld r g b // light source diffuse component
ls r g b // light source specular componet
labs r g b // light source ambient, diffuse, & specular are the same
ma r g b // mat. ambient specified for the selected objects
md r g b // diffuse
ms r g b s // specular, here s stands for shininess
mads r g b s // material ambient, diffuse, and specular are the same
me r g b // emission

5. create an environment that has any of the following effects:
transparency, fog, texture, shadow, or simply an interesting

04-30-2005, 11:57 AM
Try Nehe tutorials