Initial commit of VolumeResampler and LOD demo.

2011-07-02 12:39:04 +01:00
parent 3ab157dc3b
commit ccfa7db1fa
16 changed files with 27636 additions and 2 deletions
--- a/examples/SmoothLOD/main.cpp
+++ b/examples/SmoothLOD/main.cpp
@ -0,0 +1,111 @@
+/*******************************************************************************
+Copyright (c) 2005-2009 David Williams
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution. 	
+*******************************************************************************/
+
+#include "OpenGLWidget.h"
+
+#include "PolyVoxCore/Density.h"
+#include "PolyVoxCore/Filters.h"
+#include "PolyVoxCore/SurfaceExtractor.h"
+#include "PolyVoxCore/SurfaceMesh.h"
+#include "PolyVoxCore/RawVolume.h"
+#include "PolyVoxCore/SimpleVolume.h"
+#include "PolyVoxCore/VolumeResampler.h"
+
+#include <QApplication>
+
+//Use the PolyVox namespace
+using namespace PolyVox;
+
+void createSphereInVolume(SimpleVolume<Density8>& 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.getWidth(); z++)
+	{
+		for (int y = 0; y < volData.getHeight(); y++)
+		{
+			for (int x = 0; x < volData.getDepth(); 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 = Density8::getMaxDensity();
+
+					//Get the old voxel
+					Density8 voxel = volData.getVoxelAt(x,y,z);
+
+					//Modify the density
+					voxel.setDensity(uDensity);
+
+					//Wrte the voxel value into the volume	
+					volData.setVoxelAt(x, y, z, voxel);
+				}
+
+				//144 in the middle, (144 - 32) at the edges. Threshold of 128 is between these
+				//volData.setVoxelAt(x, y, z, 144 - fDistToCenter);
+			}
+		}
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	//Create and show the Qt OpenGL window
+	QApplication app(argc, argv);
+	OpenGLWidget openGLWidget(0);
+	openGLWidget.show();
+
+	//Create an empty volume and then place a sphere in it
+	SimpleVolume<Density8> volData(PolyVox::Region(Vector3DInt32(0,0,0), Vector3DInt32(63, 63, 63)));
+	createSphereInVolume(volData, 28);
+
+	//Smooth the data
+	smoothRegion<SimpleVolume, Density8>(volData, volData.getEnclosingRegion());
+	smoothRegion<SimpleVolume, Density8>(volData, volData.getEnclosingRegion());
+	smoothRegion<SimpleVolume, Density8>(volData, volData.getEnclosingRegion());
+
+	RawVolume<Density8> volDataLowLOD(PolyVox::Region(Vector3DInt32(0,0,0), Vector3DInt32(31, 31, 31)));
+
+	VolumeResampler<SimpleVolume, RawVolume, Density8> volumeResampler(&volData, volData.getEnclosingRegion(), &volDataLowLOD, volDataLowLOD.getEnclosingRegion());
+	volumeResampler.execute();
+
+	//Extract the surface
+	SurfaceMesh<PositionMaterialNormal> mesh;
+	SurfaceExtractor<RawVolume, Density8 > surfaceExtractor(&volDataLowLOD, volDataLowLOD.getEnclosingRegion(), &mesh);
+	surfaceExtractor.execute();
+
+	mesh.scaleVertices(2.0f);
+
+	//Pass the surface to the OpenGL window
+	openGLWidget.setSurfaceMeshToRender(mesh);
+
+	//Run the message pump.
+	return app.exec();
+}