From 1b77e3ed627afb917d6d4d5ad219dcb6d2587675 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Fri, 8 Dec 2017 18:18:27 +0100
Subject: [PATCH] CS: Add ortho camera setting

---
 apps/opencs/model/prefs/state.cpp       |  2 ++
 apps/opencs/view/render/scenewidget.cpp | 33 +++++++++++++++++++------
 apps/opencs/view/render/scenewidget.hpp |  2 ++
 3 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/apps/opencs/model/prefs/state.cpp b/apps/opencs/model/prefs/state.cpp
index be6534089..f4ba134d0 100644
--- a/apps/opencs/model/prefs/state.cpp
+++ b/apps/opencs/model/prefs/state.cpp
@@ -194,6 +194,8 @@ void CSMPrefs::State::declare()
 
     declareCategory ("Rendering");
     declareDouble ("camera-fov", "Camera FOV", 90.).setPrecision(5).setRange(10.0, 160.0);
+    declareBool ("camera-ortho", "Orthographic projection for camera", false);
+    declareDouble ("camera-ortho-size", "Orthographic projection size parameter", 100.0).setPrecision(5).setRange(0.0, 1000.0);
 
     declareCategory ("Tooltips");
     declareBool ("scene", "Show Tooltips in 3D scenes", true);
diff --git a/apps/opencs/view/render/scenewidget.cpp b/apps/opencs/view/render/scenewidget.cpp
index 7d3ac3f1c..a151c638e 100644
--- a/apps/opencs/view/render/scenewidget.cpp
+++ b/apps/opencs/view/render/scenewidget.cpp
@@ -67,10 +67,7 @@ RenderWidget::RenderWidget(QWidget *parent, Qt::WindowFlags f)
     mView->getCamera()->setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
     mView->getCamera()->setViewport( new osg::Viewport(0, 0, traits->width, traits->height) );
 
-    mView->getCamera()->setProjectionMatrixAsPerspective(
-        CSMPrefs::get()["Rendering"]["camera-fov"].toDouble(),
-        static_cast<double>(traits->width)/static_cast<double>(traits->height),
-        1.0f, 10000.0f);
+    updateCameraParameters();
 
     SceneUtil::LightManager* lightMgr = new SceneUtil::LightManager;
     lightMgr->setStartLight(1);
@@ -374,12 +371,34 @@ void SceneWidget::settingChanged (const CSMPrefs::Setting *setting)
     {
         mOrbitCamControl->setOrbitSpeedMultiplier(setting->toDouble());
     }
-    else if (*setting=="Rendering/camera-fov")
+    else if (*setting=="Rendering/camera-fov" ||
+             *setting=="Rendering/camera-ortho" ||
+             *setting=="Rendering/camera-ortho-size")
     {
+        updateCameraParameters();
+    }
+}
+
+void RenderWidget::updateCameraParameters()
+{
+    const float near = 1.0;
+    const float far = 1000.0;
+
+    if (CSMPrefs::get()["Rendering"]["camera-ortho"].isTrue())
+    {
+        const float size = CSMPrefs::get()["Rendering"]["camera-ortho-size"].toDouble();
+        const float half_w = size / 100.0 * static_cast<double>(width());
+        const float half_h = size / 100.0 * static_cast<double>(height());
+
+        mView->getCamera()->setProjectionMatrixAsOrtho(
+            -half_w, half_w, -half_h, half_h, near, far);
+    }
+    else
+    { 
         mView->getCamera()->setProjectionMatrixAsPerspective(
-            setting->toDouble(),
+            CSMPrefs::get()["Rendering"]["camera-fov"].toDouble(),
             static_cast<double>(width())/static_cast<double>(height()),
-            1.0f, 10000.0f);
+            near, far);
     }
 }
 
diff --git a/apps/opencs/view/render/scenewidget.hpp b/apps/opencs/view/render/scenewidget.hpp
index cc3191c81..af7a6f1ec 100644
--- a/apps/opencs/view/render/scenewidget.hpp
+++ b/apps/opencs/view/render/scenewidget.hpp
@@ -64,6 +64,8 @@ namespace CSVRender
             osg::ref_ptr<osgViewer::View> mView;
             osg::ref_ptr<osg::Group> mRootNode;
 
+            void updateCameraParameters();
+
             QTimer mTimer;
 
         protected slots: