From ddb9be979d93b7e17f1067dc6056de54d9828b29 Mon Sep 17 00:00:00 2001 From: Miikka Heikkinen Date: Tue, 9 Sep 2014 11:30:15 +0300 Subject: Limit volume to axis ranges The volume object that would go partially outside axis ranges is scale and repositioned so that it only renders the portion that is inside the axis ranges. Change-Id: I792494e437998ba6276f58fab645767276c1476d Reviewed-by: Mika Salmela --- src/datavisualization/engine/surface3drenderer.cpp | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'src/datavisualization/engine/surface3drenderer.cpp') diff --git a/src/datavisualization/engine/surface3drenderer.cpp b/src/datavisualization/engine/surface3drenderer.cpp index ced4c789..fb7322cc 100644 --- a/src/datavisualization/engine/surface3drenderer.cpp +++ b/src/datavisualization/engine/surface3drenderer.cpp @@ -158,6 +158,46 @@ void Surface3DRenderer::fixCameraTarget(QVector3D &target) target.setZ(target.z() * -m_scaleZ); } +void Surface3DRenderer::getVisibleItemBounds(QVector3D &minBounds, QVector3D &maxBounds) +{ + // The inputs are the item bounds in OpenGL coordinates. + // The outputs limit these bounds to visible ranges, normalized to range [-1, 1] + // Volume shader flips the Y and Z axes, so we need to set negatives of actual values to those + float itemRangeX = (maxBounds.x() - minBounds.x()); + float itemRangeY = (maxBounds.y() - minBounds.y()); + float itemRangeZ = (maxBounds.z() - minBounds.z()); + + if (minBounds.x() < -m_scaleX) + minBounds.setX(-1.0f + (2.0f * qAbs(minBounds.x() + m_scaleX) / itemRangeX)); + else + minBounds.setX(-1.0f); + + if (minBounds.y() < -m_scaleY) + minBounds.setY(-(-1.0f + (2.0f * qAbs(minBounds.y() + m_scaleY) / itemRangeY))); + else + minBounds.setY(1.0f); + + if (minBounds.z() < -m_scaleZ) + minBounds.setZ(-(-1.0f + (2.0f * qAbs(minBounds.z() + m_scaleZ) / itemRangeZ))); + else + minBounds.setZ(1.0f); + + if (maxBounds.x() > m_scaleX) + maxBounds.setX(1.0f - (2.0f * qAbs(maxBounds.x() - m_scaleX) / itemRangeX)); + else + maxBounds.setX(1.0f); + + if (maxBounds.y() > m_scaleY) + maxBounds.setY(-(1.0f - (2.0f * qAbs(maxBounds.y() - m_scaleY) / itemRangeY))); + else + maxBounds.setY(-1.0f); + + if (maxBounds.z() > m_scaleZ) + maxBounds.setZ(-(1.0f - (2.0f * qAbs(maxBounds.z() - m_scaleZ) / itemRangeZ))); + else + maxBounds.setZ(-1.0f); +} + void Surface3DRenderer::updateData() { calculateSceneScalingFactors(); -- cgit v1.2.3