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;
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;