BRL-CAD (Org ID 4884012200361984)
Task ID 4936444632629248 | Task Definition ID 5863379483230208
Max instances: 2

Title: Extruded bitmap (EBM) images from database object, update data structure (task #1 of 5)
Description: BRL-CAD's extruded bitmap object type (EBM) takes an image file and extrudes it into 3D geometry based on an input image.  Traditionally, this image has lived in a black & white (.bw) image file that you have to remember to copy with your .g geometry file.  You can read up on an example at https://brlcad.org/wiki/EBM

We'd like for EBM to read image data from another database object instead of from a file.  This is similar to what we already do for DSP objects (see src/librt/primitives/dsp/dsp.c).  This chain of tasks implements support for doing this.

For this first task, add a 'datasrc' and 'bip' field to the ebm data structure in include/rt/geom.h similar to what is already in place for the dsp data structure.  The datasrc field will be used later to keep track of whether the data is in a file or object.  The bip field is where the image data will be when the datasrc is an object .  After modifying geom.h, modify the import5 and export5 routines in src/librt/primitives/ebm/ebm.c (similar to what you'll find in src/librt/primitives/dsp/dsp.c) so that the new datasrc and bip fields are read from and written to disk.

See https://brlcad.org/wiki/Patches for details on how to make a patch file.

**SUBMIT** a patch file with your source code changes.
Tags: computer graphics, file i/o, c/c++

Categories: Coding
Is Beginner: No
Time given to complete: 5 days

Mentors: erik.greenwald@gmail.com, brlcad@gmail.com, DanielMRossberg@gmail.com, dubenko.oleksandr@gmail.com
Student: Jebbly (ID 6044361150693376)

Status: COMPLETED (2019-12-24 23:11:41)
Last modified: 2019-12-24 05:07:06