Particle: Update billboard for some case

Author: ducphamhong

Projects/Skylicht/Components/ParticleSystem/CParticleRenderer.cpp

@@ -97,14 +97,11 @@ namespace Skylicht
 				modelView.getInversePrimitive(invModelView); // wont work for odd modelview matrices (but should happen in very special cases)
 			}
 
-			core::vector3df look(invModelView[8], invModelView[9], invModelView[10]);
-			core::vector3df up(invModelView[4], invModelView[5], invModelView[6]);
+			m_billboardLook.set(invModelView[8], invModelView[9], invModelView[10]);
+			m_billboardUp.set(invModelView[4], invModelView[5], invModelView[6]);
 
-			look.normalize();
-			up.normalize();
-
-			CShaderParticle::setViewUp(up);
-			CShaderParticle::setViewLook(look);
+			m_billboardLook.normalize();
+			m_billboardUp.normalize();
 
 			CEntity** entities = m_group->getEntities();
 			int numEntity = m_group->getEntityCount();
@@ -167,6 +164,7 @@ namespace Skylicht
 			for (u32 i = 0, n = data->AllGroups.size(); i < n; i++)
 			{
 				CGroup* g = groups[i];
+
 				if (g->getCurrentParticleCount() > 0 && g->Visible)
 				{
 					IRenderer* renderer = g->getRenderer();
@@ -210,6 +208,17 @@ namespace Skylicht
 			IMeshBuffer* buffer = NULL;
 			IRenderer* renderer = group->getRenderer();
 
+			if (group->UseOrientationAsBillboard)
+			{
+				CShaderParticle::setViewUp(group->OrientationUp);
+				CShaderParticle::setViewLook(group->OrientationNormal);
+			}
+			else
+			{
+				CShaderParticle::setViewUp(m_billboardUp);
+				CShaderParticle::setViewLook(m_billboardLook);
+			}
+
 			if (renderer->useInstancing() == true)
 			{
 				CParticleInstancing* instancing = group->getIntancing();

Projects/Skylicht/Components/ParticleSystem/CParticleRenderer.h

@@ -45,6 +45,8 @@ namespace Skylicht
 			CEntityGroup* m_group;
 			core::matrix4 m_transform;
 
+			core::vector3df m_billboardUp;
+			core::vector3df m_billboardLook;
 		public:
 			CParticleRenderer();
 

Projects/Skylicht/Components/ParticleSystem/Particles/CGroup.cpp

@@ -40,6 +40,7 @@ namespace Skylicht
 			LifeMin(1.0f),
 			LifeMax(2.0f),
 			GravityValue(0.0f),
+			UseOrientationAsBillboard(false),
 			OrientationNormal(1.0f, 0.0f, 0.0f),
 			OrientationUp(0.0f, 1.0f, 0.0f),
 			Name(L"Group"),

Projects/Skylicht/Components/ParticleSystem/Particles/CGroup.h

@@ -135,6 +135,7 @@ namespace Skylicht
 			core::vector3df Gravity;
 			core::vector3df OrientationNormal;
 			core::vector3df OrientationUp;
+			bool UseOrientationAsBillboard;
 
 			std::wstring Name;
 			bool Visible;