diff options
author | Miikka Heikkinen <miikka.heikkinen@digia.com> | 2014-09-09 11:30:15 +0300 |
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committer | Miikka Heikkinen <miikka.heikkinen@digia.com> | 2014-09-10 12:30:54 +0300 |
commit | ddb9be979d93b7e17f1067dc6056de54d9828b29 (patch) | |
tree | df612c56e4a804481297ae55b29f0ee379c5f8ab /src/datavisualization/engine/surface3drenderer.cpp | |
parent | bb30ea555c71604de9a2bc5096fa35c9532b26bd (diff) |
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 <mika.salmela@digia.com>
Diffstat (limited to 'src/datavisualization/engine/surface3drenderer.cpp')
-rw-r--r-- | src/datavisualization/engine/surface3drenderer.cpp | 40 |
1 files changed, 40 insertions, 0 deletions
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(); |