Android NDK Beginner's Guide - Second Edition

Time for action – rendering a star field

Let's now see how to apply this particle effect in DroidBlaster:

1. In jni/GraphicsManager.hpp, define a new method to load a vertex buffer.

   Add an array to store vertex buffer resources:

   ...
   class GraphicsManager {
   public:
       ...
       GLuint loadShader(const char* pVertexShader,
               const char* pFragmentShader);
       GLuint loadVertexBuffer(const void* pVertexBuffer,
               int32_t pVertexBufferSize);
   
   private:
       ...
       GLuint mShaders[32]; int32_t mShaderCount;
       GLuint mVertexBuffers[32]; int32_t mVertexBufferCount;
   
       GraphicsComponent* mComponents[32]; int32_t mComponentCount;
   };
   #endif

2. In jni/GraphicsManager.cpp, update the constructor initialization list and free vertex buffer resources in stop():

   ... GraphicsManager::GraphicsManager(android_app* ...