The　curvature　radii　and　relative　angles　of　a　planar　continuous　curve　at　discrete　points　are　chosen　as　local　parameters　to　represent　the　curve　and　thereby　the　programmed　digital　path　atlas　of　mechanisms　is　set　up.　The　mathematical　models　of　mechanism　synthesis　for　path　generation　based　on　the　local　characteristics　are　built　and　the　genetic　algorithms　are　applied　to　synthesize　the　mechanisms　concurrently,　combining　the　type　synthesis　and　the　dimension　synthesis　of　mechanisms　to　some　extend.