Each scene file will have the following format:
a - Steve
b
p
t
# Source image feature lines
[P1x, P1y][Q1x, Q1y]
...
# Destination image feature lines
[P1x, P1y][Q1x, Q1y]
...
Sample Feature lines
The scene files are specified using the OpenGL coordinate system. Namely,
the origin is located at the top left corner of the image, with the
positive X-axis direction going across the width of the image, and
the positive Y-axis going down the height of the image. In particular,
if a scene file feature line is:
[P1x, P1y][Q1x, Q1y] = [0, 0][w, h]
where w is the width of the image and h is the height,
that line has its P endpoint at the top left corner of the image
and the Q endpoint at the bottom right corner.
To give an idea of what the feature lines look like, here
are two screen shots of the feature lines given for the
rotated F example and football to basketball example scene files below.
Sample scenes
The images of the letter F came from here
Notes:
PPM file format
Here is some sample C++ code to read and write to a PPM
file.
Here is a sample openGL application that reads a ppm image, displays it in a
GLUT window, and writes the image to disk. main.cpp.
