Introduce QGeometryRenderer::sortIndex

Lets user override the sorting order of entities.

[ChangeLog] Add sortIndex property to QGeometryRenderer to
explicitly control the order in which entities are rendered

Pick-to: 5.15
Change-Id: Iab7fd0d705f7ddcb424a59f86f8c2c28059813d1
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/render/geometry/geometryrenderer.cpp b/src/render/geometry/geometryrenderer.cpp
index d314e87ce..3cbf6f066 100644
--- a/src/render/geometry/geometryrenderer.cpp
+++ b/src/render/geometry/geometryrenderer.cpp
@@ -69,6 +69,7 @@ GeometryRenderer::GeometryRenderer()
     , m_primitiveType(QGeometryRenderer::Triangles)
     , m_dirty(false)
     , m_manager(nullptr)
+    , m_sortIndex(-1.f)
 {
 }
 
@@ -92,6 +93,7 @@ void GeometryRenderer::cleanup()
     m_geometryId = Qt3DCore::QNodeId();
     m_dirty = false;
     m_geometryFactory.reset();
+    m_sortIndex = -1.f;
 }
 
 void GeometryRenderer::setManager(GeometryRendererManager *manager)
@@ -162,6 +164,8 @@ void GeometryRenderer::syncFromFrontEnd(const QNode *frontEnd, bool firstTime)
         }
     }
 
+    m_sortIndex = node->sortIndex();
+
     markDirty(AbstractRenderer::GeometryDirty);
 }