From 105761151d7e1873a3436c75aac8d3e3bc74bfad Mon Sep 17 00:00:00 2001
From: vincentlj <vincentlj@178a84e3-b1eb-0310-8ba1-8eac791a3b58>
Date: Thu, 9 Jan 2014 01:32:17 +0000
Subject: [PATCH] GPUParticles: Another snow tweak

Slightly more particles, constrained rotation direction, lower speed (vector and rotation)

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14976 178a84e3-b1eb-0310-8ba1-8eac791a3b58
---
 data/gfx/snow.xml             | 12 ++++++------
 src/graphics/gpuparticles.cpp |  8 ++++----
 src/karts/kart.cpp            |  2 +-
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/data/gfx/snow.xml b/data/gfx/snow.xml
index 1943e897a..531266b3b 100644
--- a/data/gfx/snow.xml
+++ b/data/gfx/snow.xml
@@ -5,19 +5,19 @@
 
     <spreading angle="3"           />
     
-    <velocity  x="-0.01"
+    <velocity  x="-0.005"
                y="-0.01"
-               z="-0.02"             />
+               z="-0.005"             />
     
     <material  file="snowflake.png" clampu="Y" clampv="Y" />
     
     <!-- Amount of particles emitted per second -->
-    <rate      min="400"
-               max="500"           />
+    <rate      min="1000"
+               max="1000"           />
     
     <!-- Minimal and maximal lifetime of a particle, in milliseconds. -->
-    <lifetime  min="9000"
-               max="9000"          />
+    <lifetime  min="10000"
+               max="10000"          />
     
     <!-- Size of the particles -->
     <size      min="0.40"
diff --git a/src/graphics/gpuparticles.cpp b/src/graphics/gpuparticles.cpp
index 2cd372394..9a119cd6e 100644
--- a/src/graphics/gpuparticles.cpp
+++ b/src/graphics/gpuparticles.cpp
@@ -348,14 +348,14 @@ void ParticleSystemProxy::setEmitter(scene::IParticleEmitter* emitter)
 	float *quaternions = new float[4 * count];
 	for (unsigned i = 0; i < count; i++)
 	{
-		core::vector3df rotationdir(1., 0., 0.);
-		rotationdir.rotateXYBy(os::Randomizer::frand() * 180.);
+		core::vector3df rotationdir(0., 1., 0.);
+		/*rotationdir.rotateXYBy(os::Randomizer::frand() * 180.);
 		rotationdir.rotateYZBy(os::Randomizer::frand() * 180.);
-		rotationdir.rotateXZBy(os::Randomizer::frand() * 180.);
+		rotationdir.rotateXZBy(os::Randomizer::frand() * 180.);*/
 		quaternions[4 * i] = rotationdir.X;
 		quaternions[4 * i + 1] = rotationdir.Y;
 		quaternions[4 * i + 2] = rotationdir.Z;
-		quaternions[4 * i + 3] = 31.4 * os::Randomizer::frand(); // 10 rotation during lifetime at max
+		quaternions[4 * i + 3] = 3.14 * 3. * ( 2. * os::Randomizer::frand() - 1.); // 3 half rotation during lifetime at max
 	}
 	glGenBuffers(1, &quaternionsbuffer);
 	glBindBuffer(GL_ARRAY_BUFFER, quaternionsbuffer);
diff --git a/src/karts/kart.cpp b/src/karts/kart.cpp
index 111716e50..a84b3f5fa 100644
--- a/src/karts/kart.cpp
+++ b/src/karts/kart.cpp
@@ -2313,7 +2313,7 @@ void Kart::loadData(RaceManager::KartType type, bool is_animated_model)
 
         m_sky_particles_emitter =
             new ParticleEmitter(track->getSkyParticles(),
-                                core::vector3df(0.0f, 20.0f, 100.0f),
+                                core::vector3df(0.0f, 30.0f, 100.0f),
                                 getNode());
 
         // FIXME: in multiplayer mode, this will result in several instances