NAME

zshadecar

SYNOPSIS

/usr/people/demos/zshadecar

DESCRIPTION

This program demonstrates advanced graphics features of the IRIS 2400: cubic patches, depth cuing, Z-buffering and Gouraud shading.  The object is a car formed of bi-cubic patches.

The first image to appear is a grey scale chart, representing the gamma corrected color map.  The next image is of lines connecting the basis points of the object.  From these basis points we then derive a cubic patch, first shown as an array of points. 

Menu selections for invoking the various display modes are made by pressing one of the following keys:

 d - turn on depth cuing
p - draw point display
s - draw as splines
w - original wireframe
z - zbuffer & Gouraud shaded version
  To rotate the image, move the mouse in the X direction only.
 Pressing the LEFT mouse button rotates the car in X
Pressing the MIDDLE mouse button rotates the car in Y
Pressing the RIGHT mouse button rotates the car in Z
  

The usual way to display zshadecar is to rotate the wire frame or point surface interactively to the desired position and then smooth shade and z-buffer it. 

HARDWARE CONFIGURATION

A minimum configuration of 32 bitplanes, 1.5 Megabytes of memory, and Z-clipping is required. 

Version 2.3  —  July 04, 1985