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Refactoring example code.

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This commit is contained in:
David Williams
2015-02-20 11:23:17 +01:00
parent 3f849e19a4
commit 565aa21799
5 changed files with 232 additions and 198 deletions
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160
examples/OpenGL/main.cpp
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@ -47,100 +47,110 @@ using namespace std;
const int32_t g_uVolumeSideLength = 128;
int main(int argc, char *argv[])
class OpenGLExample : public OpenGLWidget
{
FilePager<MaterialDensityPair88>* pager = new FilePager<MaterialDensityPair88>(".");
PagedVolume<MaterialDensityPair88> volData(PolyVox::Region(Vector3DInt32(0, 0, 0), Vector3DInt32(g_uVolumeSideLength - 1, g_uVolumeSideLength - 1, g_uVolumeSideLength - 1)), pager);
//Make our volume contain a sphere in the center.
int32_t minPos = 0;
int32_t midPos = g_uVolumeSideLength / 2;
int32_t maxPos = g_uVolumeSideLength - 1;
cout << "Creating sphere 1" << std::endl;
createSphereInVolume(volData, 60.0f, 5);
cout << "Creating sphere 2" << std::endl;
createSphereInVolume(volData, 50.0f, 4);
cout << "Creating sphere 3" << std::endl;
createSphereInVolume(volData, 40.0f, 3);
cout << "Creating sphere 4" << std::endl;
createSphereInVolume(volData, 30.0f, 2);
cout << "Creating sphere 5" << std::endl;
createSphereInVolume(volData, 20.0f, 1);
cout << "Creating cubes" << std::endl;
createCubeInVolume(volData, Vector3DInt32(minPos, minPos, minPos), Vector3DInt32(midPos-1, midPos-1, midPos-1), 0);
createCubeInVolume(volData, Vector3DInt32(midPos+1, midPos+1, minPos), Vector3DInt32(maxPos, maxPos, midPos-1), 0);
createCubeInVolume(volData, Vector3DInt32(midPos+1, minPos, midPos+1), Vector3DInt32(maxPos, midPos-1, maxPos), 0);
createCubeInVolume(volData, Vector3DInt32(minPos, midPos+1, midPos+1), Vector3DInt32(midPos-1, maxPos, maxPos), 0);
createCubeInVolume(volData, Vector3DInt32(1, midPos-10, midPos-10), Vector3DInt32(maxPos-1, midPos+10, midPos+10), MaterialDensityPair44::getMaxDensity());
createCubeInVolume(volData, Vector3DInt32(midPos-10, 1, midPos-10), Vector3DInt32(midPos+10, maxPos-1, midPos+10), MaterialDensityPair44::getMaxDensity());
createCubeInVolume(volData, Vector3DInt32(midPos-10, midPos-10 ,1), Vector3DInt32(midPos+10, midPos+10, maxPos-1), MaterialDensityPair44::getMaxDensity());
QApplication app(argc, argv);
OpenGLWidget openGLWidget(0);
openGLWidget.show();
QSharedPointer<QGLShaderProgram> shader(new QGLShaderProgram);
if (!shader->addShaderFromSourceFile(QGLShader::Vertex, ":/openglexample.vert"))
public:
OpenGLExample(QWidget *parent)
:OpenGLWidget(parent)
{
std::cerr << shader->log().toStdString() << std::endl;
exit(EXIT_FAILURE);
}
if (!shader->addShaderFromSourceFile(QGLShader::Fragment, ":/openglexample.frag"))
protected:
void initialize() override
{
std::cerr << shader->log().toStdString() << std::endl;
exit(EXIT_FAILURE);
}
FilePager<MaterialDensityPair88>* pager = new FilePager<MaterialDensityPair88>(".");
PagedVolume<MaterialDensityPair88> volData(PolyVox::Region(Vector3DInt32(0, 0, 0), Vector3DInt32(g_uVolumeSideLength - 1, g_uVolumeSideLength - 1, g_uVolumeSideLength - 1)), pager);
openGLWidget.setShader(shader);
//Make our volume contain a sphere in the center.
int32_t minPos = 0;
int32_t midPos = g_uVolumeSideLength / 2;
int32_t maxPos = g_uVolumeSideLength - 1;
QTime time;
time.start();
//openGLWidget.setVolume(&volData);
cout << endl << "Time taken = " << time.elapsed() / 1000.0f << "s" << endl << endl;
cout << "Creating sphere 1" << std::endl;
createSphereInVolume(volData, 60.0f, 5);
cout << "Creating sphere 2" << std::endl;
createSphereInVolume(volData, 50.0f, 4);
cout << "Creating sphere 3" << std::endl;
createSphereInVolume(volData, 40.0f, 3);
cout << "Creating sphere 4" << std::endl;
createSphereInVolume(volData, 30.0f, 2);
cout << "Creating sphere 5" << std::endl;
createSphereInVolume(volData, 20.0f, 1);
const int32_t extractedRegionSize = 32;
int meshCounter = 0;
cout << "Creating cubes" << std::endl;
createCubeInVolume(volData, Vector3DInt32(minPos, minPos, minPos), Vector3DInt32(midPos - 1, midPos - 1, midPos - 1), 0);
createCubeInVolume(volData, Vector3DInt32(midPos + 1, midPos + 1, minPos), Vector3DInt32(maxPos, maxPos, midPos - 1), 0);
createCubeInVolume(volData, Vector3DInt32(midPos + 1, minPos, midPos + 1), Vector3DInt32(maxPos, midPos - 1, maxPos), 0);
createCubeInVolume(volData, Vector3DInt32(minPos, midPos + 1, midPos + 1), Vector3DInt32(midPos - 1, maxPos, maxPos), 0);
for (int32_t z = 0; z < volData.getDepth(); z += extractedRegionSize)
{
for (int32_t y = 0; y < volData.getHeight(); y += extractedRegionSize)
createCubeInVolume(volData, Vector3DInt32(1, midPos - 10, midPos - 10), Vector3DInt32(maxPos - 1, midPos + 10, midPos + 10), MaterialDensityPair44::getMaxDensity());
createCubeInVolume(volData, Vector3DInt32(midPos - 10, 1, midPos - 10), Vector3DInt32(midPos + 10, maxPos - 1, midPos + 10), MaterialDensityPair44::getMaxDensity());
createCubeInVolume(volData, Vector3DInt32(midPos - 10, midPos - 10, 1), Vector3DInt32(midPos + 10, midPos + 10, maxPos - 1), MaterialDensityPair44::getMaxDensity());
QSharedPointer<QGLShaderProgram> shader(new QGLShaderProgram);
if (!shader->addShaderFromSourceFile(QGLShader::Vertex, ":/openglexample.vert"))
{
for (int32_t x = 0; x < volData.getWidth(); x += extractedRegionSize)
std::cerr << shader->log().toStdString() << std::endl;
exit(EXIT_FAILURE);
}
if (!shader->addShaderFromSourceFile(QGLShader::Fragment, ":/openglexample.frag"))
{
std::cerr << shader->log().toStdString() << std::endl;
exit(EXIT_FAILURE);
}
setShader(shader);
QTime time;
time.start();
//openGLWidget.setVolume(&volData);
cout << endl << "Time taken = " << time.elapsed() / 1000.0f << "s" << endl << endl;
const int32_t extractedRegionSize = 32;
int meshCounter = 0;
for (int32_t z = 0; z < volData.getDepth(); z += extractedRegionSize)
{
for (int32_t y = 0; y < volData.getHeight(); y += extractedRegionSize)
{
// Specify the region to extract based on a starting position and the desired region sze.
PolyVox::Region regToExtract(x, y, z, x + extractedRegionSize, y + extractedRegionSize, z + extractedRegionSize);
for (int32_t x = 0; x < volData.getWidth(); x += extractedRegionSize)
{
// Specify the region to extract based on a starting position and the desired region sze.
PolyVox::Region regToExtract(x, y, z, x + extractedRegionSize, y + extractedRegionSize, z + extractedRegionSize);
// If you uncomment this line you will be able to see that the volume is rendered as multiple seperate meshes.
//regToExtract.shrink(1);
// If you uncomment this line you will be able to see that the volume is rendered as multiple seperate meshes.
//regToExtract.shrink(1);
// Perform the extraction for this region of the volume
auto mesh = extractMarchingCubesMesh(&volData, regToExtract);
// Perform the extraction for this region of the volume
auto mesh = extractMarchingCubesMesh(&volData, regToExtract);
// The returned mesh needs to be decoded to be appropriate for GPU rendering.
auto decodedMesh = decodeMesh(mesh);
// The returned mesh needs to be decoded to be appropriate for GPU rendering.
auto decodedMesh = decodeMesh(mesh);
// Pass the surface to the OpenGL window. Note that we are also passing an offset in this multi-mesh example. This is because
// the surface extractors return a mesh with 'local space' positions to reduce storage requirements and precision problems.
openGLWidget.addMesh(decodedMesh, decodedMesh.getOffset());
// Pass the surface to the OpenGL window. Note that we are also passing an offset in this multi-mesh example. This is because
// the surface extractors return a mesh with 'local space' positions to reduce storage requirements and precision problems.
addMesh(decodedMesh, decodedMesh.getOffset());
meshCounter++;
meshCounter++;
}
}
}
cout << "Rendering volume as " << meshCounter << " seperate meshes" << endl;
setViewableRegion(volData.getEnclosingRegion());
}
};
cout << "Rendering volume as " << meshCounter << " seperate meshes" << endl;
openGLWidget.setViewableRegion(volData.getEnclosingRegion());
int main(int argc, char *argv[])
{
//Create and show the Qt OpenGL window
QApplication app(argc, argv);
OpenGLExample openGLWidget(0);
openGLWidget.show();
//Run the message pump.
return app.exec();
}
}