-GLfloat zoom = 0.0, rotate = 0.0;
-GLfloat zoomFactor = 0.2, rotateFactor = 0.5;
+GLfloat zoom = 0.0, rotate = 0.0, camAngle = 40.0;
+GLfloat zoomFactor = 0.2, rotateFactor = 0.5, camAngleFactor = 0.5;
+GLfloat leftrightFactor = 0.5, nearfarFactor = 0.5, bigsmallFactor = 1.2, updownFactor = 0.5;