A Topograph Coordinate Generator in Python
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A Height Map Coordinate Generator in Python. Windows Only. Please note: this program is being completely re-programmed to add more coordinate generation options to suit generation of height maps in different forms. As of the current version, it only supports being generated onto a 2D canvas that can't be rotated; I am planning on changing this in the future.

Installing Requirements

Pillow is the only requirement for this module and it is used for reading images. To install, use:

pip install pillow


ToporaPy is not available on PyPI yet, but you can still install the master branch through pip with the following command:

pip install -e git+https://github.com/mitgobla/TopograPy.git@master#egg=topograpy

Alternatively, you can get future versions that have not been release to the master branch by using the following:

pip install -e git+https://github.com/mitgobla/TopograPy.git@future#egg=topograpy

Example Usage

Here's a video of a render of a Grand Canyon height map, that used this module in line with PyOpenGL and PyGame. Click to watch on YouTube

Example Code

import topograpy

cross_section = topograpy.CrossSection()
graph = topograpy.SectionCalculation()

topograph = cross_section.calculate("height_map.png", graph)
coordinates = cross_section.return_coordinates()
image_size = coordinates[2] # Tuple of image x and y size
heights = graph.return_darkness() # The height of each line based on height % of image

To get the darkness (height factor) for a specific pixel:

>>> heights[x_coordinate][y_coordinate]
>>> heights[0][0]
# The higher the number, the 'taller' the pixel on the height map

Generator for creating two sets of coordinates to generate a line.

generated_coordinates = [[], []]
for x_coord in range(image_size[0]):
    for y_coord in range(image_size[1]):
        generated_coordinates[0].append((x_coord, heights[x_coord][y_coord], y_coord)
        generated_coordinates[1].append((x_coord, 0, y_coord))

This will generate a list with two lists xyz1 and xyz2

>>> generated_coordinates[0][0]
(0, 25, 0)
>>> generated_coordinates[1][0]
(0, 0, 0)