124 lines
4.5 KiB
C++
124 lines
4.5 KiB
C++
/*******************************************************************************
|
|
The MIT License (MIT)
|
|
|
|
Copyright (c) 2015 David Williams and Matthew Williams
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
*******************************************************************************/
|
|
|
|
#include "PolyVoxExample.h"
|
|
|
|
#include "PolyVox/Density.h"
|
|
#include "PolyVox/MarchingCubesSurfaceExtractor.h"
|
|
#include "PolyVox/Mesh.h"
|
|
#include "PolyVox/RawVolume.h"
|
|
#include "PolyVox/VolumeResampler.h"
|
|
|
|
#include <QApplication>
|
|
|
|
//Use the PolyVox namespace
|
|
using namespace PolyVox;
|
|
|
|
void createSphereInVolume(RawVolume<uint8_t>& volData, float fRadius)
|
|
{
|
|
//This vector hold the position of the center of the volume
|
|
Vector3DFloat v3dVolCenter(volData.getWidth() / 2, volData.getHeight() / 2, volData.getDepth() / 2);
|
|
|
|
//This three-level for loop iterates over every voxel in the volume
|
|
for (int z = 0; z < volData.getDepth(); z++)
|
|
{
|
|
for (int y = 0; y < volData.getHeight(); y++)
|
|
{
|
|
for (int x = 0; x < volData.getWidth(); x++)
|
|
{
|
|
//Store our current position as a vector...
|
|
Vector3DFloat v3dCurrentPos(x,y,z);
|
|
//And compute how far the current position is from the center of the volume
|
|
float fDistToCenter = (v3dCurrentPos - v3dVolCenter).length();
|
|
|
|
if(fDistToCenter <= fRadius)
|
|
{
|
|
//Our new density value
|
|
uint8_t uDensity = std::numeric_limits<uint8_t>::max();
|
|
|
|
//Wrte the voxel value into the volume
|
|
volData.setVoxel(x, y, z, uDensity);
|
|
}
|
|
|
|
//144 in the middle, (144 - 32) at the edges. Threshold of 128 is between these
|
|
//volData.setVoxel(x, y, z, 144 - fDistToCenter);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
class SmoothLODExample : public PolyVoxExample
|
|
{
|
|
public:
|
|
SmoothLODExample(QWidget *parent)
|
|
:PolyVoxExample(parent)
|
|
{
|
|
}
|
|
|
|
protected:
|
|
void initializeExample() override
|
|
{
|
|
//Create an empty volume and then place a sphere in it
|
|
RawVolume<uint8_t> volData(PolyVox::Region(Vector3DInt32(0, 0, 0), Vector3DInt32(63, 63, 63)));
|
|
createSphereInVolume(volData, 28);
|
|
|
|
//Smooth the data - should reimplement this using LowPassFilter
|
|
//smoothRegion<PagedVolume, Density8>(volData, volData.getEnclosingRegion());
|
|
//smoothRegion<PagedVolume, Density8>(volData, volData.getEnclosingRegion());
|
|
//smoothRegion<PagedVolume, Density8>(volData, volData.getEnclosingRegion());
|
|
|
|
RawVolume<uint8_t> volDataLowLOD(PolyVox::Region(Vector3DInt32(0, 0, 0), Vector3DInt32(15, 31, 31)));
|
|
|
|
VolumeResampler< RawVolume<uint8_t>, RawVolume<uint8_t> > volumeResampler(&volData, PolyVox::Region(Vector3DInt32(0, 0, 0), Vector3DInt32(31, 63, 63)), &volDataLowLOD, volDataLowLOD.getEnclosingRegion());
|
|
volumeResampler.execute();
|
|
|
|
//Extract the surface
|
|
auto meshLowLOD = extractMarchingCubesMesh(&volDataLowLOD, volDataLowLOD.getEnclosingRegion());
|
|
// The returned mesh needs to be decoded to be appropriate for GPU rendering.
|
|
auto decodedMeshLowLOD = decodeMesh(meshLowLOD);
|
|
|
|
//Extract the surface
|
|
auto meshHighLOD = extractMarchingCubesMesh(&volData, PolyVox::Region(Vector3DInt32(30, 0, 0), Vector3DInt32(63, 63, 63)));
|
|
// The returned mesh needs to be decoded to be appropriate for GPU rendering.
|
|
auto decodedMeshHighLOD = decodeMesh(meshHighLOD);
|
|
|
|
//Pass the surface to the OpenGL window
|
|
addMesh(decodedMeshHighLOD, Vector3DInt32(30, 0, 0));
|
|
addMesh(decodedMeshLowLOD, Vector3DInt32(0, 0, 0), 63.0f / 31.0f);
|
|
|
|
setCameraTransform(QVector3D(100.0f, 100.0f, 100.0f), -(PI / 4.0f), PI + (PI / 4.0f));
|
|
}
|
|
};
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
//Create and show the Qt OpenGL window
|
|
QApplication app(argc, argv);
|
|
SmoothLODExample openGLWidget(0);
|
|
openGLWidget.show();
|
|
|
|
//Run the message pump.
|
|
return app.exec();
|
|
}
|