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Work on Qt version of example.

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This commit is contained in:
David Williams 2009-03-28 09:36:09 +00:00
parent ee5e33612c
commit 00f19e05a4
2 changed files with 46 additions and 42 deletions
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86
examples/OpenGL/OpenGLWidget.cpp
View File

@ -16,51 +16,55 @@ OpenGLWidget::OpenGLWidget(QWidget *parent)
void OpenGLWidget::setVolume(PolyVox::Volume<PolyVox::uint8>* volData)
{
//First we free anything from the previous volume (if there was one).
m_mapOpenGLSurfacePatches.clear();
m_mapIndexedSurfacePatches.clear();
m_volData = volData;
//Our volume is broken down into cuboid regions, and we create one mesh for each region.
//This three-level for loop iterates over each region.
for(uint16 uRegionZ = 0; uRegionZ < g_uVolumeSideLengthInRegions; ++uRegionZ)
//If we have any volume data then generate the new surface patches.
if(m_volData != 0)
{
for(uint16 uRegionY = 0; uRegionY < g_uVolumeSideLengthInRegions; ++uRegionY)
//Our volume is broken down into cuboid regions, and we create one mesh for each region.
//This three-level for loop iterates over each region.
for(uint16 uRegionZ = 0; uRegionZ < g_uVolumeSideLengthInRegions; ++uRegionZ)
{
for(uint16 uRegionX = 0; uRegionX < g_uVolumeSideLengthInRegions; ++uRegionX)
for(uint16 uRegionY = 0; uRegionY < g_uVolumeSideLengthInRegions; ++uRegionY)
{
//Create a new surface patch (which is basiaclly the PolyVox term for a mesh).
IndexedSurfacePatch* ispCurrent = new IndexedSurfacePatch();
//Compute the extents of the current region
//FIXME - This is a little complex? PolyVox could
//provide more functions for dealing with regions?
uint16 regionStartX = uRegionX * g_uRegionSideLength;
uint16 regionStartY = uRegionY * g_uRegionSideLength;
uint16 regionStartZ = uRegionZ * g_uRegionSideLength;
uint16 regionEndX = regionStartX + g_uRegionSideLength + 1; //Why do we need the '+1' here?
uint16 regionEndY = regionStartY + g_uRegionSideLength + 1; //Why do we need the '+1' here?
uint16 regionEndZ = regionStartZ + g_uRegionSideLength + 1; //Why do we need the '+1' here?
Vector3DInt32 regLowerCorner(regionStartX, regionStartY, regionStartZ);
Vector3DInt32 regUpperCorner(regionEndX, regionEndY, regionEndZ);
//Extract the surface for this region
extractReferenceSurface(m_volData, Region(regLowerCorner, regUpperCorner), ispCurrent);
Vector3DUint8 v3dRegPos(uRegionX,uRegionY,uRegionZ);
if(g_bUseOpenGLVertexBufferObjects)
for(uint16 uRegionX = 0; uRegionX < g_uVolumeSideLengthInRegions; ++uRegionX)
{
//g_openGLSurfacePatches[uRegionX][uRegionY][uRegionZ] = BuildOpenGLSurfacePatch(*ispCurrent);
OpenGLSurfacePatch openGLSurfacePatch = BuildOpenGLSurfacePatch(*ispCurrent);
m_mapOpenGLSurfacePatches.insert(make_pair(v3dRegPos, openGLSurfacePatch));
//Create a new surface patch (which is basiaclly the PolyVox term for a mesh).
IndexedSurfacePatch* ispCurrent = new IndexedSurfacePatch();
//Compute the extents of the current region
//FIXME - This is a little complex? PolyVox could
//provide more functions for dealing with regions?
uint16 regionStartX = uRegionX * g_uRegionSideLength;
uint16 regionStartY = uRegionY * g_uRegionSideLength;
uint16 regionStartZ = uRegionZ * g_uRegionSideLength;
uint16 regionEndX = regionStartX + g_uRegionSideLength + 1; //Why do we need the '+1' here?
uint16 regionEndY = regionStartY + g_uRegionSideLength + 1; //Why do we need the '+1' here?
uint16 regionEndZ = regionStartZ + g_uRegionSideLength + 1; //Why do we need the '+1' here?
Vector3DInt32 regLowerCorner(regionStartX, regionStartY, regionStartZ);
Vector3DInt32 regUpperCorner(regionEndX, regionEndY, regionEndZ);
//Extract the surface for this region
extractReferenceSurface(m_volData, Region(regLowerCorner, regUpperCorner), ispCurrent);
Vector3DUint8 v3dRegPos(uRegionX,uRegionY,uRegionZ);
if(m_bUseOpenGLVertexBufferObjects)
{
OpenGLSurfacePatch openGLSurfacePatch = BuildOpenGLSurfacePatch(*ispCurrent);
m_mapOpenGLSurfacePatches.insert(make_pair(v3dRegPos, openGLSurfacePatch));
}
else
{
m_mapIndexedSurfacePatches.insert(make_pair(v3dRegPos, ispCurrent));
}
//delete ispCurrent;
}
else
{
//g_indexedSurfacePatches[uRegionX][uRegionY][uRegionZ] = ispCurrent;
//m_volIndexedSurfacePatches->setVoxelAt(uRegionX,uRegionY,uRegionZ,ispCurrent);
m_mapIndexedSurfacePatches.insert(make_pair(v3dRegPos, ispCurrent));
}
//delete ispCurrent;
}
}
}
@ -68,8 +72,8 @@ void OpenGLWidget::setVolume(PolyVox::Volume<PolyVox::uint8>* volData)
void OpenGLWidget::initializeGL()
{
g_bUseOpenGLVertexBufferObjects = true;
if(g_bUseOpenGLVertexBufferObjects)
m_bUseOpenGLVertexBufferObjects = true;
if(m_bUseOpenGLVertexBufferObjects)
{
#ifdef WIN32
//If we are on Windows we will need GLEW to access recent OpenGL functionality
@ -134,7 +138,7 @@ void OpenGLWidget::paintGL()
for(uint16 uRegionX = 0; uRegionX < g_uVolumeSideLengthInRegions; ++uRegionX)
{
Vector3DUint8 v3dRegPos(uRegionX,uRegionY,uRegionZ);
if(g_bUseOpenGLVertexBufferObjects)
if(m_bUseOpenGLVertexBufferObjects)
{
renderRegionVertexBufferObject(m_mapOpenGLSurfacePatches[v3dRegPos]);
}

2
examples/OpenGL/OpenGLWidget.h
View File

@ -37,7 +37,7 @@ class OpenGLWidget : public QGLWidget
private:
bool g_bUseOpenGLVertexBufferObjects;
bool m_bUseOpenGLVertexBufferObjects;
//Creates a volume 128x128x128
PolyVox::Volume<PolyVox::uint8>* m_volData;