Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/Headers/VROPointCloudEmitter.h

@@ -0,0 +1,75 @@
+//
+//  VROPointCloudEmitter.h
+//  ViroKit
+//
+//  Copyright © 2017 Viro Media. All rights reserved.
+//
+
+#ifndef VROPointCloudEmitter_h
+#define VROPointCloudEmitter_h
+
+#include <stdio.h>
+#include "VROParticleEmitter.h"
+
+class VRODriver;
+class VRONode;
+class VROSurface;
+class VROARSession;
+class VROBillboardConstraint;
+
+/*
+ Class that inheirits from VROParticleEmitter that uses the particle system to draw
+ PointCloud points that we get from the given VROARSession.
+
+ Only things that can really be modified are the surface, scale and # of particles
+ */
+class VROPointCloudEmitter : public VROParticleEmitter {
+public:
+    VROPointCloudEmitter(std::shared_ptr<VRODriver> driver,
+                         std::shared_ptr<VROARSession> session);
+    virtual ~VROPointCloudEmitter() {};
+
+    void setParticleScale(VROVector3f scale) {
+        _particleScale = scale;
+    }
+
+    void clearParticles();
+    void update(const VRORenderContext &context, const VROMatrix4f &computedTransform);
+
+    void resetParticleSurface();
+    void setParticleSurface(std::shared_ptr<VROSurface> particleSurface);
+
+private:
+    std::weak_ptr<VROARSession> _arSession;
+    VROVector3f _particleScale;
+
+    /*
+     This function updates the _particles array with the given pointCloudPoints by reusing particles,
+     resurrecting zombie particles and/or creating new ones to meet the demand. It also computes
+     the boundingbox that contains all the points.
+     */
+    VROBoundingBox updateParticles(std::vector<VROVector4f> pointCloudPoints,
+                                   const VRORenderContext &context);
+
+    /*
+     This function updates the UBO w/ the particles in _particles.
+     */
+    void updateUBO(VROBoundingBox boundingBox);
+
+    /*
+     Computes the transform for the given particle with the given position, constraint
+     and also updates the given boundingBox.
+     */
+    void computeParticleTransform(VROParticle *particle,
+                                  VROVector4f position,
+                                  std::shared_ptr<VROBillboardConstraint> constraint,
+                                  VROBoundingBox *boundingBox,
+                                  const VRORenderContext &context);
+    
+    /*
+     This function adds all _particles from startIndex and on to _zombieParticles
+     */
+    void zombifyParticles(int startIndex);
+};
+
+#endif /* VROPointCloudEmitter_h */