GLfloat lineLength = 10;
/* Zoom and rotate tracking */
-GLfloat zoom = 0.0, rotate = 0.0, camAngle = 40.0;
+GLfloat zoom = 0.1, rotate = 0.1, camAngle = 40.0;
GLfloat zoomFactor = 0.2, camRotateFactor = 0.5, camAngleFactor = 0.5;
GLfloat leftrightFactor = 0.05, nearfarFactor = 0.1, bigsmallFactor = 0.6;
GLfloat updownFactor = 0.03, rotateFactor = 0.8, texscaleFactor = 0.2;