From bca21193c32f9b903b48d4d8a192577ce3325211 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Lemaire?= <michael@thunderk.net>
Date: Wed, 8 Aug 2012 14:25:01 +0000
Subject: [PATCH] paysages : Heightmap editor - Added resolution control.

git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@404 b1fd45b6-86a6-48da-8261-f70d1f35bdcc
---
 TODO                       |  6 +++-
 gui_qt/dialogheightmap.cpp | 66 ++++++++++++++++++++++++++++++++++++++
 gui_qt/dialogheightmap.h   |  4 +++
 3 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/TODO b/TODO
index 731b504..8478596 100644
--- a/TODO
+++ b/TODO
@@ -10,7 +10,11 @@ Technology Preview 2 :
 - Improve previews.
    => Add user markers on OSD.
    => Add areas marking.
-- Start a terrain editor (see mockup).
+- Improve terrain canvas editor.
+   => Add GeoArea editor.
+   => Apply GeoArea to revertToTerrain.
+   => Resample map on changing resolution.
+   => Map loading should not choose arbitrary resolution.
 - Improve textures (current model is greatly incorrect).
    => Separate models (basic texture and covering texture).
    => Covering texture height should inpact terrain height.
diff --git a/gui_qt/dialogheightmap.cpp b/gui_qt/dialogheightmap.cpp
index 0ec694f..2a732da 100644
--- a/gui_qt/dialogheightmap.cpp
+++ b/gui_qt/dialogheightmap.cpp
@@ -7,6 +7,7 @@
 #include <QComboBox>
 #include <QSlider>
 #include <QFileDialog>
+#include <QInputDialog>
 #include <math.h>
 #include "../lib_paysages/terrain.h"
 #include "../lib_paysages/scenery.h"
@@ -76,6 +77,14 @@ DialogHeightMap::DialogHeightMap(QWidget* parent, HeightMap* heightmap, TerrainC
     button = new QPushButton(tr("Load from picture file"), panel);
     connect(button, SIGNAL(clicked()), this, SLOT(loadFromFile()));
     panel->layout()->addWidget(button);
+
+    button = new QPushButton(tr("Change resolution"), panel);
+    connect(button, SIGNAL(clicked()), this, SLOT(changeResolution()));
+    panel->layout()->addWidget(button);
+    
+    _resolution_label = new QLabel("", panel);
+    panel->layout()->addWidget(_resolution_label);
+    updateResolutionLabel();
     
     combobox = new QComboBox(panel);
     combobox->addItem(tr("Raise / lower"));
@@ -148,6 +157,7 @@ void DialogHeightMap::revert()
 {
     heightmapCopy(_value_original, &_value_modified);
     _3dview->revert();
+    updateResolutionLabel();
 }
 
 void DialogHeightMap::angleHChanged(int value)
@@ -187,6 +197,7 @@ void DialogHeightMap::loadFromFile()
     {
         heightmapImportFromPicture(&_value_modified, (char*) filepath.toStdString().c_str());
         _3dview->revert();
+        updateResolutionLabel();
     }
 }
 
@@ -206,3 +217,58 @@ void DialogHeightMap::resetToTerrain()
         _3dview->revert();
     }
 }
+
+void DialogHeightMap::changeResolution()
+{
+    QString result;
+    QStringList items;
+    int current;
+    
+    items << QString("64 x 64") << QString("128 x 128") << QString("256 x 256") << QString("512 x 512");
+    current = 1;
+    if (_value_modified.resolution_x == 64 && _value_modified.resolution_z == 64)
+    {
+        current = 0;
+    }
+    else if (_value_modified.resolution_x == 256 && _value_modified.resolution_z == 256)
+    {
+        current = 2;
+    }
+    else if (_value_modified.resolution_x == 512 && _value_modified.resolution_z == 512)
+    {
+        current = 3;
+    }
+    result = QInputDialog::getItem(this, tr("Paysages 3D - Change heightmap resolution"), tr("Choose the new heightmap resolution. Beware that lowering the resolution may imply a loss of accuracy."), items, current, false);
+    if (!result.isEmpty())
+    {
+        int new_res_x, new_res_y;
+        if (result == QString("64 x 64"))
+        {
+            new_res_x = new_res_y = 64;
+        }
+        else if (result == QString("256 x 256"))
+        {
+            new_res_x = new_res_y = 256;
+        }
+        else if (result == QString("512 x 512"))
+        {
+            new_res_x = new_res_y = 512;
+        }
+        else
+        {
+            new_res_x = new_res_y = 128;
+        }
+        
+        if (new_res_x != _value_modified.resolution_x or new_res_y != _value_modified.resolution_z)
+        {
+            heightmapChangeResolution(&_value_modified, 64, 64);
+            _3dview->revert();
+            updateResolutionLabel();
+        }
+    }
+}
+
+void DialogHeightMap::updateResolutionLabel()
+{
+    _resolution_label->setText(tr("Map resolution : %1 x %2").arg(_value_modified.resolution_x).arg(_value_modified.resolution_z));
+}
diff --git a/gui_qt/dialogheightmap.h b/gui_qt/dialogheightmap.h
index e7c0b96..757e624 100644
--- a/gui_qt/dialogheightmap.h
+++ b/gui_qt/dialogheightmap.h
@@ -1,6 +1,7 @@
 #ifndef _PAYSAGES_QT_DIALOGHEIGHTMAP_H_
 #define _PAYSAGES_QT_DIALOGHEIGHTMAP_H_
 
+#include <QLabel>
 #include "tools.h"
 #include "widgetheightmap.h"
 #include "../lib_paysages/heightmap.h"
@@ -26,11 +27,14 @@ private slots:
     void brushStrengthChanged(int value);
     void loadFromFile();
     void resetToTerrain();
+    void changeResolution();
+    void updateResolutionLabel();
 
 private:
     HeightMap* _value_original;
     HeightMap _value_modified;
     WidgetHeightMap* _3dview;
+    QLabel* _resolution_label;
     TerrainCanvas* _canvas;
 };