From 1094206677a8b7ad60adbf9842b0e4a13e95eb8c Mon Sep 17 00:00:00 2001
From: david <david>
Date: Sat, 20 Apr 2002 14:07:34 +0000
Subject: [PATCH] Add support for interpolation tables for non-linear
 animations.

Remove header dependencies where possible, to speed up rebuilds.
---
 src/Model/model.cxx | 66 +++++++++++++++++++++++++++++++++------------
 src/Model/model.hxx | 22 ++++++++++++---
 2 files changed, 67 insertions(+), 21 deletions(-)

diff --git a/src/Model/model.cxx b/src/Model/model.cxx
index 11ff6df1d..d8cea383f 100644
--- a/src/Model/model.cxx
+++ b/src/Model/model.cxx
@@ -14,11 +14,13 @@
 
 #include <simgear/compiler.h>
 #include <simgear/debug/logstream.hxx>
+#include <simgear/math/interpolater.hxx>
 #include <simgear/math/point3d.hxx>
 #include <simgear/math/sg_geodesy.hxx>
 #include <simgear/misc/exception.hxx>
 #include <simgear/misc/sg_path.hxx>
 
+#include <Main/fg_props.hxx>
 #include <Main/globals.hxx>
 #include <Main/location.hxx>
 #include <Scenery/scenery.hxx>
@@ -123,6 +125,26 @@ set_translation (sgMat4 &matrix, double position_m, sgVec3 &axis)
 }
 
 
+/**
+ * Read an interpolation table from properties.
+ */
+static SGInterpTable *
+read_interpolation_table (const SGPropertyNode * props)
+{
+  const SGPropertyNode * table_node = props->getNode("interpolation");
+  if (table_node != 0) {
+    SGInterpTable * table = new SGInterpTable();
+    vector<const SGPropertyNode *> entries = table_node->getChildren("entry");
+    for (int i = 0; i < entries.size(); i++)
+      table->addEntry(entries[i]->getDoubleValue("ind", 0.0),
+		      entries[i]->getDoubleValue("dep", 0.0));
+    return table;
+  } else {
+    return 0;
+  }
+}
+
+
 
 ////////////////////////////////////////////////////////////////////////
 // Implementation of FG3DModel
@@ -324,7 +346,7 @@ FG3DModel::setOrientation (double roll_deg, double pitch_deg,
 
 FG3DModel::Animation *
 FG3DModel::make_animation (const char * object_name,
-                                 SGPropertyNode * node)
+			   SGPropertyNode * node)
 {
   Animation * animation = 0;
   const char * type = node->getStringValue("type");
@@ -533,6 +555,7 @@ FG3DModel::RotateAnimation::RotateAnimation ()
   : _prop(0),
     _offset_deg(0.0),
     _factor(1.0),
+    _table(0),
     _has_min(false),
     _min_deg(0.0),
     _has_max(false),
@@ -544,12 +567,13 @@ FG3DModel::RotateAnimation::RotateAnimation ()
 
 FG3DModel::RotateAnimation::~RotateAnimation ()
 {
+  delete _table;
   _transform = 0;
 }
 
 void
 FG3DModel::RotateAnimation::init (ssgEntity * object,
-                                        SGPropertyNode * props)
+				  SGPropertyNode * props)
 {
                                 // Splice in the new transform node
   splice_branch(_transform, object);
@@ -557,6 +581,7 @@ FG3DModel::RotateAnimation::init (ssgEntity * object,
   _prop = fgGetNode(props->getStringValue("property", "/null"), true);
   _offset_deg = props->getDoubleValue("offset-deg", 0.0);
   _factor = props->getDoubleValue("factor", 1.0);
+  _table = read_interpolation_table(props);
   if (props->hasValue("min-deg")) {
     _has_min = true;
     _min_deg = props->getDoubleValue("min-deg");
@@ -578,11 +603,15 @@ FG3DModel::RotateAnimation::init (ssgEntity * object,
 void
 FG3DModel::RotateAnimation::update (int dt)
 {
-  _position_deg = ((_prop->getDoubleValue() + _offset_deg) * _factor);
-  if (_has_min && _position_deg < _min_deg)
-    _position_deg = _min_deg;
-  if (_has_max && _position_deg > _max_deg)
-    _position_deg = _max_deg;
+  if (_table == 0) {
+    _position_deg = (_prop->getDoubleValue() + _offset_deg) * _factor;
+   if (_has_min && _position_deg < _min_deg)
+     _position_deg = _min_deg;
+   if (_has_max && _position_deg > _max_deg)
+     _position_deg = _max_deg;
+  } else {
+    _position_deg = _table->interpolate(_prop->getDoubleValue());
+  }
   set_rotation(_matrix, _position_deg, _center, _axis);
   _transform->setTransform(_matrix);
 }
@@ -597,6 +626,7 @@ FG3DModel::TranslateAnimation::TranslateAnimation ()
   : _prop(0),
     _offset_m(0.0),
     _factor(1.0),
+    _table(0),
     _has_min(false),
     _min_m(0.0),
     _has_max(false),
@@ -608,12 +638,13 @@ FG3DModel::TranslateAnimation::TranslateAnimation ()
 
 FG3DModel::TranslateAnimation::~TranslateAnimation ()
 {
+  delete _table;
   _transform = 0;
 }
 
 void
 FG3DModel::TranslateAnimation::init (ssgEntity * object,
-                                        SGPropertyNode * props)
+				     SGPropertyNode * props)
 {
                                 // Splice in the new transform node
   splice_branch(_transform, object);
@@ -621,6 +652,7 @@ FG3DModel::TranslateAnimation::init (ssgEntity * object,
   _prop = fgGetNode(props->getStringValue("property", "/null"), true);
   _offset_m = props->getDoubleValue("offset-m", 0.0);
   _factor = props->getDoubleValue("factor", 1.0);
+  _table = read_interpolation_table(props);
   if (props->hasValue("min-m")) {
     _has_min = true;
     _min_m = props->getDoubleValue("min-m");
@@ -639,18 +671,18 @@ FG3DModel::TranslateAnimation::init (ssgEntity * object,
 void
 FG3DModel::TranslateAnimation::update (int dt)
 {
-  _position_m = ((_prop->getDoubleValue() + _offset_m) * _factor);
-  if (_has_min && _position_m < _min_m)
-    _position_m = _min_m;
-  if (_has_max && _position_m > _max_m)
-    _position_m = _max_m;
+  if (_table == 0) {
+    _position_m = (_prop->getDoubleValue() + _offset_m) * _factor;
+    if (_has_min && _position_m < _min_m)
+      _position_m = _min_m;
+    if (_has_max && _position_m > _max_m)
+      _position_m = _max_m;
+  } else {
+    _position_m = _table->interpolate(_prop->getDoubleValue());
+  }
   set_translation(_matrix, _position_m, _axis);
   _transform->setTransform(_matrix);
 }
 
 
 // end of model.cxx
-
-
-
-
diff --git a/src/Model/model.hxx b/src/Model/model.hxx
index ce4112ba9..82f7891c4 100644
--- a/src/Model/model.hxx
+++ b/src/Model/model.hxx
@@ -11,12 +11,23 @@
 #endif
 
 #include <vector>
-#include <plib/ssg.h>
 
 SG_USING_STD(vector);
 
-#include <Main/fg_props.hxx>
-#include <Main/location.hxx>
+#include <plib/sg.h>
+
+
+// Don't pull in the headers, since we don't need them here.
+class ssgEntity;
+class ssgRangeSelector;
+class ssgSelector;
+class ssgTransform;
+
+class SGPropertyNode;
+class SGInterpTable;
+class FGCondition;
+class FGLocation;
+
 
 // Has anyone done anything *really* stupid, like making min and max macros?
 #ifdef min
@@ -58,7 +69,7 @@ public:
   virtual void setOrientation (double roll_deg, double pitch_deg,
 			       double heading_deg);
 
-  virtual ssgEntity * getSceneGraph () const { return _selector; }
+  virtual ssgEntity * getSceneGraph () const { return (ssgEntity *)_selector; }
 
   virtual FGLocation * getFGLocation () const { return _location; }
 
@@ -90,6 +101,7 @@ private:
 				// Location
   FGLocation * _location;
 
+
   
   //////////////////////////////////////////////////////////////////////
   // Internal classes for individual animations.
@@ -210,6 +222,7 @@ private:
     SGPropertyNode * _prop;
     double _offset_deg;
     double _factor;
+    SGInterpTable * _table;
     bool _has_min;
     double _min_deg;
     bool _has_max;
@@ -236,6 +249,7 @@ private:
     SGPropertyNode * _prop;
     double _offset_m;
     double _factor;
+    SGInterpTable * _table;
     bool _has_min;
     double _min_m;
     bool _has_max;
-- 
2.39.5