diff --git a/render/GlutRender.cpp b/render/GlutRender.cpp
index fdc4fae..31268d6 100644
--- a/render/GlutRender.cpp
+++ b/render/GlutRender.cpp
@@ -49,21 +49,21 @@ void GlutRender::run() {
 }
 
 void GlutRender::reshape(int wid, int hei) {
-	if (hei == 0)
+    if (hei == 0)
         hei = 1;
-	GLfloat aspect = (GLfloat)wid / (GLfloat)hei;
+    GLfloat aspect = (GLfloat)wid / (GLfloat)hei;
 
-	glViewport(0, 0, wid, hei);
+    glViewport(0, 0, wid, hei);
 
-	glMatrixMode(GL_PROJECTION);
-	glLoadIdentity();
-	// Enable perspective projection with fovy, aspect, zNear and zFar
-	gluPerspective(45.0f, aspect, 0.1f, 100.0f);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    // Enable perspective projection with fovy, aspect, zNear and zFar
+    gluPerspective(45.0f, aspect, 0.1f, 100.0f);
 }
 
 void GlutRender::display() {
-	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-	glMatrixMode(GL_MODELVIEW);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glMatrixMode(GL_MODELVIEW);
 
     // Camera position and orientation
     glLoadIdentity();
@@ -91,7 +91,7 @@ void GlutRender::display() {
         glEnd();
     }
 
-	glutSwapBuffers();
+    glutSwapBuffers();
 }
 
 void GlutRender::reshape_handle(int wid, int hei) {