Added tutorial 609_Boolean and CGAL python module + functions

Former-commit-id: 7b6b91bd7a
2016-06-17 17:25:27 +02:00
parent 39df4de193
commit 9727746942
8 changed files with 312 additions and 2 deletions
@@ -0,0 +1,84 @@
+import sys, os
+
+# Add the igl library to the modules search path
+sys.path.insert(0, os.getcwd() + "/../")
+import pyigl as igl
+
+from shared import TUTORIAL_SHARED_PATH, check_dependencies
+
+dependencies = ["cgal", "viewer"]
+check_dependencies(dependencies)
+
+boolean_type_names = {igl.MESH_BOOLEAN_TYPE_UNION: "Union", igl.MESH_BOOLEAN_TYPE_INTERSECT: "Intersect", igl.MESH_BOOLEAN_TYPE_MINUS: "Minus", igl.MESH_BOOLEAN_TYPE_XOR: "XOR", igl.MESH_BOOLEAN_TYPE_RESOLVE: "Resolve"}
+
+boolean_types = list(boolean_type_names.keys())
+
+
+
+
+def update(viewer):
+    print("Calculating A %s B..." % boolean_type_names[boolean_type])
+    igl.cgal.mesh_boolean(VA, FA, VB, FB, boolean_type, VC, FC, J)
+    C = igl.eigen.MatrixXd(FC.rows(), 3)
+
+    for f in range(C.rows()):
+        if J[f] < FA.rows():
+            C.setRow(f, Red)
+        else:
+            C.setRow(f, Green)
+
+    viewer.data.clear()
+    viewer.data.set_mesh(VC, FC)
+    viewer.data.set_colors(C)
+    print("Done.")
+
+
+def key_down(viewer, key, modifier):
+    global boolean_type
+    # print(boolean_types)
+    if key == ord('.'):
+        boolean_type = boolean_types[(boolean_types.index(boolean_type) + 1) % (len(boolean_types))]
+    elif key == ord(','):
+        boolean_type = boolean_types[(boolean_types.index(boolean_type) + len(boolean_types) - 1) % len(boolean_types)]
+    elif key == ord('['):
+        viewer.core.camera_dnear -= 0.1
+    elif key == ord(']'):
+        viewer.core.camera_dnear += 0.1
+    else:
+        return False
+
+    #igl.cgal.mesh_boolean(VA, FA, VB, FB, boolean_type, VC, FC)
+    update(viewer)
+
+    return False
+
+
+if __name__ == "__main__":
+    # Mesh with per-face color
+    VA = igl.eigen.MatrixXd()
+    FA = igl.eigen.MatrixXi()
+    VB = igl.eigen.MatrixXd()
+    FB = igl.eigen.MatrixXi()
+    VC = igl.eigen.MatrixXd()
+    FC = igl.eigen.MatrixXi()
+    J = igl.eigen.MatrixXi()
+
+    Red = igl.eigen.MatrixXd([[1, 0, 0]])
+    Green = igl.eigen.MatrixXd([[0, 1, 0]])
+
+    # Load meshes in OFF format
+    igl.readOFF(TUTORIAL_SHARED_PATH + "cheburashka.off", VA, FA)
+    igl.readOFF(TUTORIAL_SHARED_PATH + "decimated-knight.off", VB, FB)
+
+    boolean_type = igl.MESH_BOOLEAN_TYPE_UNION
+
+    viewer = igl.viewer.Viewer()
+    update(viewer)
+
+    print(
+        "Usage: Press '.' to switch to next boolean operation type. \nPress ',' to switch to previous boolean operation type. \nPress ']' to push near cutting plane away from camera. \nPress '[' to pull near cutting plane closer to camera. \nHint: investigate _inside_ the model to see orientation changes. \n")
+
+    viewer.core.show_lines = True
+    viewer.callback_key_down = key_down
+    viewer.core.camera_dnear = 3.9
+    viewer.launch()