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Canvas view camera element: Difference between revisions

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Canvas view camera element (view source)

Revision as of 13:13, 2 January 2018

6,816 bytes removed ,  2 January 2018
m
→‎C++: outdated
mNo edit summary
m (→‎C++: outdated)
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   }}</ref>
   }}</ref>
* check if '''CullThreadPerCameraDrawThreadPerContext''' works, see [[Howto:Activate multi core and multi GPU support]]
* check if '''CullThreadPerCameraDrawThreadPerContext''' works, see [[Howto:Activate multi core and multi GPU support]]
== C++ ==
The following is the boilerplate code neede to add a new element to the Canvas system inheriting from the Canvas::Image class, i.e. an element having its own allocated Image/texture buffer, which is what we can use to render a camera into it:
<syntaxhighlight lang="diff">
diff --git a/simgear/canvas/elements/CMakeLists.txt b/simgear/canvas/elements/CMakeLists.txt
index 2b537c0..4eb1e95 100644
--- a/simgear/canvas/elements/CMakeLists.txt
+++ b/simgear/canvas/elements/CMakeLists.txt
@@ -7,6 +7,7 @@ set(HEADERS
  CanvasMap.hxx
  CanvasPath.hxx
  CanvasText.hxx
+  CanvasView.hxx
)
set(DETAIL_HEADERS
@@ -20,6 +21,7 @@ set(SOURCES
  CanvasMap.cxx
  CanvasPath.cxx
  CanvasText.cxx
+  CanvasView.cxx
)
simgear_scene_component(canvas-elements canvas/elements "${SOURCES}" "${HEADERS}")
@@ -28,4 +30,4 @@ simgear_component(canvas-elements/detail canvas/elements/detail "" "${DETAIL_HEA
add_boost_test(canvas_element
  SOURCES canvas_element_test.cpp
  LIBRARIES ${TEST_LIBS}
-)
\ No newline at end of file
+)
diff --git a/simgear/canvas/elements/CanvasGroup.cxx b/simgear/canvas/elements/CanvasGroup.cxx
index c753c2e..5d2585e 100644
--- a/simgear/canvas/elements/CanvasGroup.cxx
+++ b/simgear/canvas/elements/CanvasGroup.cxx
@@ -23,6 +23,8 @@
#include "CanvasMap.hxx"
#include "CanvasPath.hxx"
#include "CanvasText.hxx"
+#include "CanvasView.hxx"
+
#include <simgear/canvas/CanvasEventVisitor.hxx>
#include <simgear/canvas/events/MouseEvent.hxx>
@@ -66,6 +68,7 @@ namespace canvas
    add<Map  >(_child_factories);
    add<Path >(_child_factories);
    add<Text >(_child_factories);
+    add<View >(_child_factories);
  }
  //----------------------------------------------------------------------------
diff --git a/simgear/canvas/elements/CanvasView.cxx b/simgear/canvas/elements/CanvasView.cxx
new file mode 100644
index 0000000..edae7ab
--- /dev/null
+++ b/simgear/canvas/elements/CanvasView.cxx
@@ -0,0 +1,88 @@
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include <simgear_config.h>
+#include "CanvasView.hxx"
+
+#include <cmath>
+
+#include <boost/algorithm/string/predicate.hpp>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  //----------------------------------------------------------------------------
+  const std::string View::TYPE_NAME = "view-camera";
+
+  //----------------------------------------------------------------------------
+  void View::staticInit()
+  {
+    Image::staticInit();
+
+    if( isInit<View>() )
+      return;
+
+    // Do some initialization if needed...
+  }
+
+  //----------------------------------------------------------------------------
+  View::View( const CanvasWeakPtr& canvas,
+            const SGPropertyNode_ptr& node,
+            const Style& parent_style,
+            ElementWeakPtr parent ):
+    Image(canvas, node, parent_style, parent)
+  {
+    staticInit();
+  }
+
+  //----------------------------------------------------------------------------
+  View::~View()
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  void View::update(double dt)
+  {
+    Image::update(dt);
+  }
+
+  //----------------------------------------------------------------------------
+  void View::childAdded(SGPropertyNode* parent, SGPropertyNode* child)
+  {
+      return Image::childAdded(parent, child);
+  }
+
+  //----------------------------------------------------------------------------
+  void View::childRemoved(SGPropertyNode* parent, SGPropertyNode* child)
+  {
+      return Image::childRemoved(parent, child);
+  }
+
+  //----------------------------------------------------------------------------
+  void View::valueChanged(SGPropertyNode* child)
+  {
+    return Image::valueChanged(child);
+  }
+
+  //----------------------------------------------------------------------------
+  void View::childChanged(SGPropertyNode* child)
+  {
+      return Image::childChanged(child);
+
+  }
+} // namespace canvas
+} // namespace simgear
diff --git a/simgear/canvas/elements/CanvasView.hxx b/simgear/canvas/elements/CanvasView.hxx
new file mode 100644
index 0000000..7b2ec4e
--- /dev/null
+++ b/simgear/canvas/elements/CanvasView.hxx
@@ -0,0 +1,59 @@
+// Based on https://forum.flightgear.org/viewtopic.php?f=71&t=23929
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_VIEW_HXX_
+#define CANVAS_VIEW_HXX_
+
+#include "CanvasImage.hxx"
+
+#include <boost/shared_ptr.hpp>
+#include <boost/unordered_map.hpp>
+#include <boost/unordered_set.hpp>
+
+namespace simgear
+{
+namespace canvas
+{
+  class View:
+    public Image
+  {
+    public:
+      static const std::string TYPE_NAME;
+      static void staticInit();
+
+      View( const CanvasWeakPtr& canvas,
+          const SGPropertyNode_ptr& node,
+          const Style& parent_style,
+          ElementWeakPtr parent = 0 );
+      virtual ~View();
+
+      virtual void update(double dt);
+
+      virtual void childAdded( SGPropertyNode * parent,
+                              SGPropertyNode * child );
+      virtual void childRemoved( SGPropertyNode * parent,
+                                SGPropertyNode * child );
+      virtual void valueChanged(SGPropertyNode * child);
+
+    //protected:
+
+      virtual void childChanged(SGPropertyNode * child);
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* CANVAS_VIEW_HXX_ */
</syntaxhighlight>


== Base Package ==
== Base Package ==
Retrieved from "https://wiki.flightgear.org/Special:MobileDiff/113579"