visualization/offscreen/main.cxx

Refer to the Offscreen Rendering Example.

// ****************************************************************************
// $Id$
//
//
// This file is part of the CAD Exchanger software.
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// You may use this file under the terms of the BSD license as follows:
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// ****************************************************************************
#include <iostream>
using namespace std;
int main (int argc, char *argv[])
{
return 1;
}
if (argc != 3) {
cerr << "Usage: " << argv[0] << " <input_file> <output_file>, where:" << endl;
cerr << " <input_file> is a name of the STEP file to be read" << endl;
cerr << " <output_file> is a name of the PNG file to be write" << endl;
return 1;
}
const char* aSource = argv[1];
// Let's set new parameters
cerr << "Failed to read the file " << aSource << endl;
return 1;
}
// Making a model data
cerr << "Failed to transfer the file into inner format." << endl;
return 1;
}
// Use exceptions to get human-readable errors on fail
Base_Settings::Default()->SetValue (Base_Settings::UseExceptions, true);
try {
// Setup parameters to display one of available representation
ModelPrs_SceneNodeFactoryParameters aParameters (ModelData_RM_Any);
// Convert model into visualisation entities
ModelPrs_SceneNodeFactory aFactory (aParameters);
auto aRootNode = aFactory.Create (aModel);
// Create scene and display all entities
// Setup offscreen viewport with transparent background and perspective camera
aViewPort.Resize (800, 600);
aViewPort.SetCameraProjectionType (ModelPrs_CPT_Perspective);
aViewPort.SetCameraPositionType (ModelPrs_CMT_Default);
ModelData_Color aBackgroundColor (0x00000000);
ModelPrs_BackgroundStyle aStyle (aBackgroundColor);
aViewPort.SetBackgroundStyle (aStyle);
// Attach viewport to the scene.
if (!aViewPort.AttachToScene (aScene)) {
cerr << "Unable to attach viewport to scene" << endl;
return 1;
}
// Apply scene changes to viewport and wait until all async operations will be finished
aScene.Update();
aScene.Wait();
// Fit and center model on the image
aViewPort.FitAll();
// Grab rendered frame into image