feat: refactor code + optimizations for obj file parsing

src/renderer/mesh.cpp

@@ -0,0 +1,43 @@
+#include "renderer/mesh.h"
+
+Mesh::Mesh() {
+    glGenVertexArrays(1, &m_vao);
+    glGenBuffers(1, &m_vbo);
+    glGenBuffers(1, &m_ebo);
+
+    glBindVertexArray(m_vao);
+
+    // VBO (vertex buffer)
+    glBindBuffer(GL_ARRAY_BUFFER, m_vbo);
+    glBufferData(GL_ARRAY_BUFFER, 0, nullptr, GL_STATIC_DRAW);
+
+    // EBO (index buffer)
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, 0, nullptr, GL_STATIC_DRAW);
+
+    Vertex::DefineAttrib();
+
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindVertexArray(0);
+}
+
+void Mesh::Upload()
+{
+    glBindVertexArray(m_vao);
+
+    glBindBuffer(GL_ARRAY_BUFFER, m_vbo);
+    glBufferData(GL_ARRAY_BUFFER, m_vertexBuffer.size() * sizeof(Vertex), m_vertexBuffer.data(), GL_STATIC_DRAW);
+
+    // Upload indices
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_indexBuffer.size() * sizeof(unsigned int), m_indexBuffer.data(), GL_STATIC_DRAW);
+
+    glBindVertexArray(0);
+}
+
+void Mesh::Render()
+{
+    Bind();
+    glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(m_indexBuffer.size()), GL_UNSIGNED_INT, 0);
+    Unbind();
+}