GPUParticles: Properly handle parent for gpuparticles

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14836 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/graphics/gpuparticles.cpp

@@ -175,8 +175,8 @@ void bindUniformToTextureUnit(GLuint location, GLuint texid, unsigned textureUni
     glUniform1i(location, textureUnit);
 }
 
-GPUParticle::GPUParticle(scene::ISceneManager* mgr, ITexture *tex)
-    : scene::ISceneNode(mgr->getRootSceneNode(), mgr, -1) {
+GPUParticle::GPUParticle(scene::ISceneNode *parent, scene::ISceneManager* mgr, ITexture *tex)
+    : scene::ISceneNode(parent, mgr, -1) {
     initGL();
 	fakemat.Lighting = false;
 	fakemat.ZWriteEnable = false;
@@ -206,7 +206,8 @@ void GPUParticle::OnRegisterSceneNode() {
 
 #define COMPONENTCOUNT 8
 
-PointEmitter::PointEmitter(scene::ISceneManager* mgr, ITexture *tex,
+PointEmitter::PointEmitter(scene::ISceneNode *parent,
+  scene::ISceneManager* mgr, ITexture *tex,
   const core::vector3df& direction,
   u32 minParticlesPerSecond,
   u32 maxParticlesPerSecond,
@@ -216,7 +217,7 @@ PointEmitter::PointEmitter(scene::ISceneManager* mgr, ITexture *tex,
   s32 maxAngleDegrees
 //  const core::dimension2df& minStartSize,
 //  const core::dimension2df& maxStartSize
-) : GPUParticle(mgr, tex) {
+) : GPUParticle(parent, mgr, tex) {
 	count = maxParticlesPerSecond;
 	duration = lifeTimeMax;
 	float initial_lifetime_incr = 1000.;
@@ -296,6 +297,7 @@ void PointEmitter::simulate()
 
 void PointEmitter::draw()
 {
+  updateAbsolutePosition();
   glDisable(GL_ALPHA_TEST);
   glDepthMask(GL_FALSE);
 	glEnable(GL_BLEND);
@@ -334,7 +336,7 @@ void PointEmitter::draw()
 }
 
 RainNode::RainNode(scene::ISceneManager* mgr, ITexture *tex)
-    : GPUParticle(mgr, tex)
+    : GPUParticle(0, mgr, tex)
 {
 	RenderProgram = LoadProgram(file_manager->getAsset("shaders/rain.vert").c_str(), file_manager->getAsset("shaders/rain.frag").c_str());
 	loc_screenw = glGetUniformLocation(RenderProgram, "screenw");

src/graphics/gpuparticles.h

@@ -20,7 +20,7 @@ protected:
 	virtual void simulate() = 0;
 	virtual void draw() = 0;
 public:
-	GPUParticle(scene::ISceneManager* mgr, ITexture *tex);
+	GPUParticle(scene::ISceneNode *parent, scene::ISceneManager* mgr, ITexture *tex);
 	virtual void render();
 	virtual void OnRegisterSceneNode();
 };
@@ -40,7 +40,7 @@ protected:
   virtual void simulate();
   virtual void draw();
 public:
-  PointEmitter(
+  PointEmitter(scene::ISceneNode *parent,
     scene::ISceneManager* mgr, ITexture *tex,
     const core::vector3df& dir,
     u32 minParticlesPerSecond,

src/graphics/particle_emitter.cpp

@@ -233,6 +233,7 @@ ParticleEmitter::ParticleEmitter(const ParticleKind* type,
     m_particle_type       = NULL;
     m_parent              = parent;
     m_emission_decay_rate = 0;
+    PE = 0;
 
     setParticleType(type);
     assert(m_node != NULL);
@@ -344,7 +345,9 @@ int ParticleEmitter::getCreationRate()
  */
 void ParticleEmitter::setPosition(const Vec3 &pos)
 {
-    m_node->setPosition(pos.toIrrVector());
+  if (PE)
+    PE->setPosition(pos.toIrrVector());
+  m_node->setPosition(pos.toIrrVector());
 }   // setPosition
 
 //-----------------------------------------------------------------------------
@@ -447,7 +450,7 @@ void ParticleEmitter::setParticleType(const ParticleKind* type)
                                                        m_particle_type->getAngleSpread() /* angle */
                                                        );
 #ifdef GPUPARTICLE
-                PointEmitter *PE = new PointEmitter(irr_driver->getSceneManager(), m_node->getMaterial(0).getTexture(0),
+                PE = new PointEmitter(m_node->getParent(), irr_driver->getSceneManager(), m_node->getMaterial(0).getTexture(0),
                     velocity,
                     type->getMinRate(),  type->getMaxRate(),
                     type->getMinColor(), type->getMaxColor(),

src/graphics/particle_emitter.hpp

@@ -49,6 +49,7 @@ private:
 
     /** Irrlicht's particle systems. */
     scene::IParticleSystemSceneNode *m_node;
+    class PointEmitter *PE;
 
     Vec3                             m_position;