1 files changed, 118 insertions, 0 deletions
diff --git a/intern/cycles/render/particles.cpp b/intern/cycles/render/particles.cpp
new file mode 100644
index 00000000000..539a2333506
--- /dev/null
+++ b/intern/cycles/render/particles.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "device.h"
+#include "particles.h"
+#include "scene.h"
+
+#include "util_foreach.h"
+#include "util_map.h"
+#include "util_progress.h"
+#include "util_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Particle System */
+
+ParticleSystem::ParticleSystem()
+{
+}
+
+ParticleSystem::~ParticleSystem()
+{
+}
+
+void ParticleSystem::tag_update(Scene *scene)
+{
+	scene->particle_system_manager->need_update = true;
+}
+
+/* Particle System Manager */
+
+ParticleSystemManager::ParticleSystemManager()
+{
+	need_update = true;
+}
+
+ParticleSystemManager::~ParticleSystemManager()
+{
+}
+
+void ParticleSystemManager::device_update_particles(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress)
+{
+	/* count particles.
+	 * adds one dummy particle at the beginning to avoid invalid lookups,
+	 * in case a shader uses particle info without actual particle data.
+	 */
+	int num_particles = 1;
+	foreach(ParticleSystem *psys, scene->particle_systems)
+		num_particles += psys->particles.size();
+	
+	float4 *particles = dscene->particles.resize(PARTICLE_SIZE*num_particles);
+	
+	/* dummy particle */
+	particles[0] = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
+	
+	int i = 1;
+	foreach(ParticleSystem *psys, scene->particle_systems) {
+		foreach(Particle &pa, psys->particles) {
+			/* pack in texture */
+			int offset = i*PARTICLE_SIZE;
+			
+			particles[offset] = make_float4(pa.index, pa.age, pa.lifetime, 0.0f);
+			
+			i++;
+			
+			if(progress.get_cancel()) return;
+		}
+	}
+	
+	device->tex_alloc("__particles", dscene->particles);
+}
+
+void ParticleSystemManager::device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress)
+{
+	if(!need_update)
+		return;
+	
+	device_free(device, dscene);
+
+	if(scene->particle_systems.size() == 0)
+		return;
+
+	progress.set_status("Updating Particle Systems", "Copying Particles to device");
+	device_update_particles(device, dscene, scene, progress);
+	
+	if(progress.get_cancel()) return;
+	
+	need_update = false;
+}
+
+void ParticleSystemManager::device_free(Device *device, DeviceScene *dscene)
+{
+	device->tex_free(dscene->particles);
+	dscene->particles.clear();
+}
+
+void ParticleSystemManager::tag_update(Scene *scene)
+{
+	need_update = true;
+}
+
+CCL_NAMESPACE_END
+