added collision box/planet

src/SparkEmitter.h

@@ -51,6 +51,7 @@ namespace ZL {
 
 		bool configured;
 		void prepareDrawData();
+		bool useWorldSpace;
 
 	public:
 		SparkEmitter();
@@ -67,6 +68,7 @@ namespace ZL {
 		void setParticleSize(float size) { particleSize = size; }
 		void setBiasX(float bias) { biasX = bias; }
 
+		void setUseWorldSpace(bool use) { useWorldSpace = use; }
 		bool loadFromJsonFile(const std::string& path, Renderer& renderer, const std::string& zipFile = "");
 
 		void update(float deltaTimeMs);