X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/4162c0430092e0ba2b8d8d62b5de24cdd71abe3b..33d593f633df2de00010d668e3ef17f1b6152ac9:/examples/tutorial.py

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+#!/usr/bin/env python3
+
+# This is the code example used in the tutorial. It shows how to define and
+# manipulate polyhedra.
+
+import code
+
+
+class InteractiveConsole(code.InteractiveConsole):
+    def push(self, line=''):
+        if line:
+            print('>>>', line)
+            return super().push(line)
+        else:
+            print()
+
+
+if __name__ == '__main__':
+
+    shell = InteractiveConsole()
+
+    shell.push('from linpy import *')
+    shell.push("x, y = symbols('x y')")
+    shell.push()
+
+    shell.push('square1 = Le(0, x, 2) & Le(0, y, 2)')
+    shell.push('square1')
+    shell.push()
+
+    shell.push("square2 = Polyhedron('1 <= x <= 3, 1 <= y <= 3')")
+    shell.push('square2')
+    shell.push()
+
+    shell.push('inter = square1.intersection(square2) # or square1 & square2')
+    shell.push('inter')
+    shell.push()
+
+    shell.push('hull = square1.convex_union(square2)')
+    shell.push('hull')
+    shell.push()
+
+    shell.push('proj = square1.project([y])')
+    shell.push('proj')
+    shell.push()
+
+    shell.push('inter <= square1')
+    shell.push('inter == Empty')
+    shell.push()
+
+    shell.push('union = square1.union(square2) # or square1 | square2')
+    shell.push('union')
+    shell.push('union <= hull')
+    shell.push()
+
+    shell.push('diff = square1.difference(square2) # or square1 - square2')
+    shell.push('diff')
+    shell.push('~square1')