Allow modifying mesh vertex/index count and type.

src/IndexedMesh.h

@@ -44,9 +44,15 @@ class IndexedMesh: public Mesh {
         /** @brief Index count */
         inline GLsizei indexCount() const { return _indexCount; }
 
+        /** @brief Set index count */
+        inline void setIndexCount(GLsizei count) { _indexCount = count; }
+
         /** @brief Index type */
         inline GLenum indexType() const { return _indexType; }
 
+        /** @brief Set index type */
+        inline void setIndexType(GLsizei type) { _indexType = type; }
+
         /**
          * @brief Index buffer
          *

src/Mesh.h

@@ -94,12 +94,32 @@ class Mesh {
          */
         virtual ~Mesh();
 
+        /**
+         * @brief Whether the mesh is finalized
+         *
+         * When the mesh is finalized, no new attributes can be bound.
+         */
+        inline bool isFinalized() const { return finalized; }
+
         /** @brief Primitive type */
         inline Primitive primitive() const { return _primitive; }
 
+        /** @brief Set primitive type */
+        inline void setPrimitive(Primitive primitive) { _primitive = primitive; }
+
         /** @brief Vertex count */
         inline GLsizei vertexCount() const { return _vertexCount; }
 
+        /**
+         * @brief Set vertex count
+         *
+         * This forces recalculation of attribute positions upon next drawing.
+         */
+        inline void setVertexCount(GLsizei vertexCount) {
+            _vertexCount = vertexCount;
+            finalized = false;
+        };
+
         /**
          * @brief Add buffer
          * @param interleaved   If storing more than one attribute data in the
@@ -166,6 +186,14 @@ class Mesh {
          */
         void finalize();
 
+        /**
+         * @brief Set the mesh dirty
+         *
+         * Sets the attribute locations in buffers as dirty, so they are
+         * recalculated on next drawing.
+         */
+        inline void setDirty() { finalized = false; }
+
     private:
         Primitive _primitive;
         GLsizei _vertexCount;