Fix (again) initial scattering of now so that it falls evenly

data/gfx/snow.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 
 <!-- For sky particles, the size of the box is ignored -->
-<particles emitter="box">
+<particles emitter="box" randomize-initial-y="true">
 
     <spreading angle="3"           />
     

src/graphics/gpuparticles.cpp

@@ -33,6 +33,9 @@ ParticleSystemProxy::ParticleSystemProxy(bool createDefaultEmitter,
     const core::vector3df& scale,
     bool randomize_initial_y) : CParticleSystemSceneNode(createDefaultEmitter, parent, mgr, id, position, rotation, scale), m_alpha_additive(false), m_first_execution(true)
 {
+    if (randomize_initial_y)
+        m_randomize_initial_y = randomize_initial_y;
+
     m_randomize_initial_y = randomize_initial_y;
     size_increase_factor = 0.;
     ParticleParams = NULL;

src/graphics/particle_emitter.cpp

@@ -450,7 +450,7 @@ void ParticleEmitter::setParticleType(const ParticleKind* type)
         else
         {
             if (m_is_glsl)
-                m_node = ParticleSystemProxy::addParticleNode(m_is_glsl, false);
+                m_node = ParticleSystemProxy::addParticleNode(m_is_glsl, type->randomizeInitialY());
             else
                 m_node = irr_driver->addParticleNode();
             

src/graphics/particle_kind.cpp

@@ -58,7 +58,7 @@ ParticleKind::ParticleKind(const std::string file) : m_min_start_color(255,255,2
     m_wind_speed = 0;
     m_flips = false;
     m_vertical_particles = false;
-
+    m_randomize_initial_y = false;
 
     // ----- Read XML file
 
@@ -82,6 +82,8 @@ ParticleKind::ParticleKind(const std::string file) : m_min_start_color(255,255,2
     std::string emitterShape = "point";
     xml->get("emitter", &emitterShape);
 
+    xml->get("randomize-initial-y", &m_randomize_initial_y);
+
     if (emitterShape == "point")
     {
         m_shape = EMITTER_POINT;

src/graphics/particle_kind.hpp

@@ -103,6 +103,9 @@ private:
         player by rotating around the Y axis only */
     bool m_vertical_particles;
 
+    /** Used mainly for weather, like snow */
+    bool m_randomize_initial_y;
+
 public:
 
     /**
@@ -167,6 +170,8 @@ public:
 
     bool      isVerticalParticles() const { return m_vertical_particles; }
 
+    bool      randomizeInitialY() const { return m_randomize_initial_y; }
+
     std::string getName() const { return m_name; }
 };