diff options
Diffstat (limited to 'src/datavisualization/utils/scatterpointbufferhelper.cpp')
-rw-r--r-- | src/datavisualization/utils/scatterpointbufferhelper.cpp | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/src/datavisualization/utils/scatterpointbufferhelper.cpp b/src/datavisualization/utils/scatterpointbufferhelper.cpp index 0f290aeb..b14d84ad 100644 --- a/src/datavisualization/utils/scatterpointbufferhelper.cpp +++ b/src/datavisualization/utils/scatterpointbufferhelper.cpp @@ -20,7 +20,6 @@ QT_BEGIN_NAMESPACE_DATAVISUALIZATION -const GLfloat itemScaler = 3.0f; const QVector3D hiddenPos(-1000.0f, -1000.0f, -1000.0f); ScatterPointBufferHelper::ScatterPointBufferHelper() @@ -82,6 +81,7 @@ void ScatterPointBufferHelper::load(ScatterSeriesRenderCache *cache) ScatterRenderItemArray &renderArray = cache->renderArray(); const int renderArraySize = renderArray.size(); + m_indexCount = 0; if (m_meshDataLoaded) { // Delete old data @@ -89,25 +89,31 @@ void ScatterPointBufferHelper::load(ScatterSeriesRenderCache *cache) m_bufferedPoints.clear(); } + bool itemsVisible = false; m_bufferedPoints.resize(renderArraySize); for (int i = 0; i < renderArraySize; i++) { ScatterRenderItem &item = renderArray[i]; - if (!item.isVisible()) + if (!item.isVisible()) { m_bufferedPoints[i] = hiddenPos; - else + } else { + itemsVisible = true; m_bufferedPoints[i] = item.translation(); + } } - m_indexCount = renderArraySize; + if (itemsVisible) + m_indexCount = renderArraySize; - glGenBuffers(1, &m_pointbuffer); - glBindBuffer(GL_ARRAY_BUFFER, m_pointbuffer); - glBufferData(GL_ARRAY_BUFFER, m_bufferedPoints.size() * sizeof(QVector3D), - &m_bufferedPoints.at(0), - GL_DYNAMIC_DRAW); - glBindBuffer(GL_ARRAY_BUFFER, 0); + if (m_indexCount > 0) { + glGenBuffers(1, &m_pointbuffer); + glBindBuffer(GL_ARRAY_BUFFER, m_pointbuffer); + glBufferData(GL_ARRAY_BUFFER, m_bufferedPoints.size() * sizeof(QVector3D), + &m_bufferedPoints.at(0), + GL_DYNAMIC_DRAW); + glBindBuffer(GL_ARRAY_BUFFER, 0); - m_meshDataLoaded = true; + m_meshDataLoaded = true; + } } QT_END_NAMESPACE_DATAVISUALIZATION |