Add ability to disable vegetation rendering

It is disabled in opengl rendering for now

src/render/opengl/OpenGLRenderer.cpp

@@ -7,6 +7,7 @@
 #include "OpenGLWater.h"
 #include "OpenGLTerrain.h"
 #include "CloudsRenderer.h"
+#include "VegetationRenderer.h"
 #include "Color.h"
 #include "Scenery.h"
 #include "LightingManager.h"
@@ -61,6 +62,16 @@ OpenGLRenderer::~OpenGLRenderer()
     delete shared_state;
 }
 
+void OpenGLRenderer::prepare()
+{
+    SoftwareRenderer::prepare();
+
+    getCloudsRenderer()->setEnabled(false);
+    getLightingManager()->setSpecularity(false);
+    getGodRaysSampler()->setEnabled(false);
+    getVegetationRenderer()->setEnabled(false);
+}
+
 void OpenGLRenderer::initialize()
 {
     ready = functions->initializeOpenGLFunctions();
@@ -71,10 +82,6 @@ void OpenGLRenderer::initialize()
 
         prepare();
 
-        getCloudsRenderer()->setEnabled(false);
-        getLightingManager()->setSpecularity(false);
-        getGodRaysSampler()->setEnabled(false);
-
         skybox->initialize();
         skybox->updateScenery();
 

src/render/opengl/OpenGLRenderer.h

@@ -24,6 +24,8 @@ public:
     inline OpenGLTerrain *getTerrain() const {return terrain;}
     inline bool isDisplayed() const {return displayed;}
 
+    virtual void prepare() override;
+
     void initialize();
     void prepareOpenGLState();
     void resize(int width, int height);

src/render/software/VegetationRenderer.cpp

@@ -47,6 +47,11 @@ VegetationRenderer::VegetationRenderer(SoftwareRenderer *parent):
 {
 }
 
+void VegetationRenderer::setEnabled(bool enabled)
+{
+    this->enabled = enabled;
+}
+
 RayCastingResult VegetationRenderer::renderInstance(const SpaceSegment &segment, const VegetationInstance &instance, bool only_hit)
 {
     RayCastingResult final;
@@ -71,12 +76,19 @@ RayCastingResult VegetationRenderer::renderInstance(const SpaceSegment &segment,
 
 RayCastingResult VegetationRenderer::getResult(const SpaceSegment &segment, bool only_hit)
 {
-    // Find instances potentially crossing the segment
-    // TODO Collect the nearest hit, don't stop at the first one
-    VegetationGridIterator it(segment, this, parent->getScenery()->getVegetation()->debug_model, only_hit);
-    if (not segment.projectedOnYPlane().scaled(1.0 / DEBUG_DENSITY_FACTOR).iterateOnGrid(it))
+    if (enabled)
     {
-        return it.getResult();
+        // Find instances potentially crossing the segment
+        // TODO Collect the nearest hit, don't stop at the first one
+        VegetationGridIterator it(segment, this, parent->getScenery()->getVegetation()->debug_model, only_hit);
+        if (not segment.projectedOnYPlane().scaled(1.0 / DEBUG_DENSITY_FACTOR).iterateOnGrid(it))
+        {
+            return it.getResult();
+        }
+        else
+        {
+            return RayCastingResult();
+        }
     }
     else
     {
@@ -86,12 +98,19 @@ RayCastingResult VegetationRenderer::getResult(const SpaceSegment &segment, bool
 
 bool VegetationRenderer::applyLightFilter(LightComponent &light, const Vector3 &at)
 {
-    // Get segment to iterate
-    SpaceSegment segment(at, at.add(light.direction.scale(-1.0 * parent->render_quality)));
-    if (getResult(segment, true).hit)
+    if (enabled)
     {
-        light.color = COLOR_BLACK;
-        return false;
+        // Get segment to iterate
+        SpaceSegment segment(at, at.add(light.direction.scale(-1.0 * parent->render_quality)));
+        if (getResult(segment, true).hit)
+        {
+            light.color = COLOR_BLACK;
+            return false;
+        }
+        else
+        {
+            return true;
+        }
     }
     else
     {

src/render/software/VegetationRenderer.h

@@ -13,6 +13,11 @@ class SOFTWARESHARED_EXPORT VegetationRenderer: public LightFilter
 public:
     VegetationRenderer(SoftwareRenderer *parent);
 
+    /**
+     * Totally enable or disable the vegetation layers rendering.
+     */
+    void setEnabled(bool enabled);
+
     inline SoftwareRenderer *getParent() const {return parent;}
 
     /**
@@ -29,6 +34,7 @@ public:
 
 private:
     SoftwareRenderer *parent;
+    bool enabled;
 };
 
 }