paysages : Restored render interrupt + added LOD dynamic adaptation to framerate for wanderer.

git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@253 b1fd45b6-86a6-48da-8261-f70d1f35bdcc

TODO

@@ -1,7 +1,8 @@
-- Restore render interrupt and progress
+- Restore render progress
 - Clouds are lighted without filtering from ground (clouds lighted at night !)
 - Camera should respect ratio aspect of render area.
 - All noises should use the same entropy pool (saved separately), and avoid reallocs.
 - Implement light multi-sampling (mainly for skydome).
 - Implement scaling and scrolling on previews.
 - Water and terrain LOD moves with the camera, fix it like in the wanderer.
+- Find the random segfault at start (in PreviewTerrainColor::getColor).

gui_qt/widgetwanderer.cpp

@@ -2,6 +2,7 @@
 
 #include <QGLWidget>
 #include <QKeyEvent>
+#include <QTime>
 #include <math.h>
 #include "../lib_paysages/scenery.h"
 
@@ -20,6 +21,8 @@ WidgetWanderer::WidgetWanderer(QWidget *parent, CameraDefinition* camera):
     this->water = waterCreateDefinition();
     sceneryGetWater(&water);
     
+    average_frame_time = 0.05;
+    quality = 3;
     last_mouse_x = 0;
     last_mouse_y = 0;
 }
@@ -266,8 +269,13 @@ static void _renderTerrain(TerrainDefinition* terrain, CameraDefinition* camera,
 
 void WidgetWanderer::paintGL()
 {
+    QTime start_time;
+    double frame_time;
+    
     cameraValidateDefinition(&_current_camera, 1);
     
+    start_time = QTime::currentTime();
+    
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
     gluLookAt(_current_camera.location.x, _current_camera.location.y, _current_camera.location.z, _current_camera.target.x, _current_camera.target.y, _current_camera.target.z, _current_camera.up.x, _current_camera.up.y, _current_camera.up.z);
@@ -283,5 +291,19 @@ void WidgetWanderer::paintGL()
     glVertex3f(500.0, water.height, -500.0);
     glEnd();
 
-    _renderTerrain(&terrain, &_current_camera, 3);
+    _renderTerrain(&terrain, &_current_camera, quality);
+    
+    frame_time = 0.001 * (double)start_time.msecsTo(QTime::currentTime());
+    
+    average_frame_time = average_frame_time * 0.8 + frame_time * 0.2;
+    //printf("%d %f\n", quality, average_frame_time);
+    
+    if (average_frame_time > 0.1 && quality > 1)
+    {
+        quality--;
+    }
+    if (average_frame_time < 0.04 && quality < 10)
+    {
+        quality++;
+    }
 }

gui_qt/widgetwanderer.h

@@ -33,6 +33,9 @@ private:
     TerrainDefinition terrain;
     WaterDefinition water;
     
+    double average_frame_time;
+    int quality;
+
     int last_mouse_x;
     int last_mouse_y;
 };

lib_paysages/render.c

@@ -634,7 +634,6 @@ void renderPostProcess(RenderArea* area, Renderer* renderer, int nbchunks)
     int i;
     int x, y, dx, dy, nx, ny;
     int loops, running;
-    int _interrupt = 0; /* TEMP */
 
     if (nbchunks > MAX_CHUNKS)
     {
@@ -662,7 +661,7 @@ void renderPostProcess(RenderArea* area, Renderer* renderer, int nbchunks)
 
     running = 0;
     loops = 0;
-    while ((y < ny && !_interrupt) || running > 0)
+    while ((y < ny && !renderer->render_interrupt) || running > 0)
     {
         timeSleepMs(100);
 
@@ -676,13 +675,13 @@ void renderPostProcess(RenderArea* area, Renderer* renderer, int nbchunks)
                     chunks[i].thread = NULL;
                     running--;
                 }
-                else if (_interrupt)
+                else if (renderer->render_interrupt)
                 {
                     chunks[i].interrupt = 1;
                 }
             }
 
-            if (y < ny && !chunks[i].thread && !_interrupt)
+            if (y < ny && !chunks[i].thread && !renderer->render_interrupt)
             {
                 chunks[i].finished = 0;
                 chunks[i].interrupt = 0;

lib_paysages/renderer.c

@@ -19,7 +19,7 @@ static void* _renderFirstPass(void* data)
 
 static int _addRenderProgress(Renderer* renderer, double progress)
 {
-    return 1;
+    return !renderer->render_interrupt;
 }
 
 static double _getPrecision(Renderer* renderer, Vector3 location)
@@ -183,4 +183,5 @@ void rendererStart(Renderer* renderer, int width, int height, int quality)
 
 void rendererInterrupt(Renderer* renderer)
 {
+    renderer->render_interrupt = 1;
 }