How to calculate angular (phase) average
Formula deduction when dealing with average of wrapping-range values such as angles.
Posts by Year
2018
2017
Useful 3D geometry algorithms within a CAD application
Five algorithms that describe relationships between planes, lines and points in 3D. All applied within CAD development environment.
OpenSceneGraph intersectors example: line, point and virtual plane
Some previous tutorials combined into a single example; applicable in CAD-like environment.
2016
GLSL shader for fog imitation
By using OpenSceneGraph and GLSL shader, this code snippet demonstrates a simplest way to add a fog effect to your geometries by diluting geometry’s color in...
Qt3D minimal example using CMake
How to incorporate Qt3D C++ code using CMake.
GLSL shader that draws a Bezier line given four control points
By using OpenSceneGraph and GLSL shader, this code snippet demonstrates how to draw a Bezier line from the given control points. It works as well in 3D space...
Tiny library that performs curve fitting based on Schneider’s algorithm
An update blog on my recently implemented library for path fitting that uses C++11 and OpenSceneGraph (for visualization)
How to draw thick and smooth 3D lines in OpenSceneGraph / OpenGL
An example of a geometry shader that allows to display the thicker and smoother lines than of a default OpenGL’s line strip implementation.
Coverity and Travis CI integration set up for a project with Qt and OpenSceneGraph dependencies
A continuation post on continuous integration - this time for defect search in your codes.
How to obtain OpenGL version from within OpenSceneGraph
A self content OSG code snippet that demonstrates how to get the OpenGL version with some explanations.
TravisCI set up for a project with Qt and OpenSceneGraph dependencies
How to integrate test automation into one of your github repositories, where code is based on Qt and OpenSceneGraph libraries.
How to simulate mouse click within QTestLib on items and elements of QTreeWidget/QListWidget
Given a widget of type QTreeWidget/QListWidget, we want to be able to simulate a mouse click event on one of the items, or a button within one of the items.
Different approaches of tackling high DPI issues for Qt and OpenSceneGraph/OpenGL applications
Targeted towards high- & low- resolution monitor combination on Windows, and other high-resolution monitor platforms - using scaling by hand for OpenScen...
Quick setup to use Doxygen with CMake
API documentation with Doxygen and CMake get started, the minimal setup.
QTreeWidget: signal emission on internal moves of children within a set of parents
How to get notification and then send a signal on drag-and-drop event of QTreeWidget.
Improved customization of OpenSceneGraph line intersector to select line segments
Using the math of skew lines geometry to be able to select line segments by clicking next to the line segment
How to prepare a Windows binary that uses Qt and OpenSceneGraph
The tutorial demonstrates how to quickly assemble a stand-alone binary with the list of potentially necessary dll files so that the binary can run on another...
Quick steps for OpenSceneGraph installation in Windows
Download, compilation and OSG library installation; management of environment variables on Windows.
Designing and manipulating a Photo class using OpenSceneGraph’s texture mapping
How to perform scaling, rotation, flip and relocation of a texture-represented photograph
How to customize OpenSceneGraph’s line intersector to select line segments
A tutorial which demonstrates how to re-define your own entity (edge, or line segment) selector based on osgUtil::LineSegmentIntersector.
Incorporation of ray-casting into OpenSceneGraph’s event handler to perform drawing on plane in 3D
How to make OpenSceneGraph to find intersections between mouse’s ray cast and a user-defined types that do not have a drawable representation.
2015
Step-by-step on how to set up your CMake, Qt and OSG in draw-on-demand mode (Part 2)
Demonstration on how to trigger OpenSceneGraph events from a Qt widget on example of mouse pressed button.
Step-by-step on how to set up your CMake, Qt and OSG in draw-on-demand mode (Part 1)
A minimal CMake file that allows to set up a development environment to use with both OSG and Qt libraries. A running example of a minimal scene graph within...
Quick steps for OpenSceneGraph installation on Linux
Detailed steps to download, compile and install the library; management of environment variables and example compilation.