开始写，脸的点云了。

samples/api/texture_loading/texture_loading.h

@@ -88,6 +88,14 @@ public:
 		float     lod_bias = 0.0f;
 	} ubo_vs;
 
+	std::unique_ptr<vkb::core::BufferC> point_uniform_vs;
+	struct
+	{
+		glm::mat4 projection;
+		glm::mat4 model;
+		glm::mat4 view;
+	} point_ubo;
+
 	struct
 	{
 		VkPipeline solid;