Simple demo

This example shows how move the camera automatically.

Compile and run the example

Clone the source code, create a build directory and use cmake and make to compile the code:

git clone https://github.com/gazebosim/gz-rendering
cd gz-rendering/examples/simple_demo
mkdir build
cd build
cmake ..
# Linux
cmake --build .
# Windows
cmake --build . --config Release

Execute the example:

# Linux
./simple_demo
 
# Windows
.\Release\simple_demo

You'll see:

[Msg] Loading plugin [gz-rendering9-ogre]
===============================
  TAB - Switch render engines
  ESC - Exit
===============================

Code

The function updateCameras() is called each time the DisplayCB function runs. Using the method SetLocalPosition from the Camera class we can move the camera in the world:

void updateCameras()
 
{
  double angle = g_offset / 2 * GZ_PI;
  double x = sin(angle) * 3.0 + 3.0;
  double y = cos(angle) * 3.0;
  for (ir::CameraPtr camera : g_cameras)
  {
    camera->SetLocalPosition(x, y, 0.0);
  }
 
  g_offset += 0.0005;
}