Added tutorial 707

Former-commit-id: 3a57699280
2016-07-06 22:20:41 +02:00
parent 70f5ed2048
commit aa298105c6
10 changed files with 182 additions and 0 deletions
@@ -0,0 +1,83 @@
+import sys, os
+
+# Add the igl library to the modules search path
+from math import pi, cos
+
+sys.path.insert(0, os.getcwd() + "/../")
+import pyigl as igl
+
+from shared import TUTORIAL_SHARED_PATH, check_dependencies, print_usage
+
+dependencies = ["copyleft", "viewer"]
+check_dependencies(dependencies)
+
+
+def key_down(viewer, key, modifier):
+    global show_swept_volume, SV, SF, V, F
+    if key == ord(' '):
+        show_swept_volume = not show_swept_volume
+        viewer.data.clear()
+
+        if show_swept_volume:
+            viewer.data.set_mesh(SV, SF)
+            viewer.data.uniform_colors(igl.eigen.MatrixXd([0.2, 0.2, 0.2]), igl.eigen.MatrixXd([1.0, 1.0, 1.0]), igl.eigen.MatrixXd([1.0, 1.0, 1.0])) # TODO replace with constants from cpp
+        else:
+            viewer.data.set_mesh(V, F)
+
+        viewer.core.is_animating = not show_swept_volume
+        viewer.data.set_face_based(True)
+
+    return True
+
+
+def pre_draw(viewer):
+    global show_swept_volume, V
+    if not show_swept_volume:
+        T = transform(0.25 * igl.get_seconds())
+        VT = V * T.matrix().block(0, 0, 3, 3).transpose()
+        trans = T.matrix().block(0, 3, 3, 1).transpose()
+        Vtrans = igl.eigen.MatrixXd(VT.rows(), VT.cols())
+        Vtrans.rowwiseSet(trans)
+        VT += Vtrans
+        viewer.data.set_vertices(VT)
+        viewer.data.compute_normals()
+    return False
+
+
+# Define a rigid motion
+def transform(t):
+    T = igl.eigen.Affine3d()
+    T.setIdentity()
+    T.rotate(t * 2 * pi, igl.eigen.MatrixXd([0, 1, 0]))
+    T.translate(igl.eigen.MatrixXd([0, 0.125 * cos(2 * pi * t), 0]))
+    return T
+
+
+if __name__ == "__main__":
+    keys = {"space": "toggle between transforming original mesh and swept volume"}
+    print_usage(keys)
+
+    V = igl.eigen.MatrixXd()
+    SV = igl.eigen.MatrixXd()
+    VT = igl.eigen.MatrixXd()
+    F = igl.eigen.MatrixXi()
+    SF = igl.eigen.MatrixXi()
+    show_swept_volume = False
+    grid_size = 50
+    time_steps = 200
+    isolevel = 1
+
+    igl.read_triangle_mesh(TUTORIAL_SHARED_PATH + "bunny.off", V, F)
+
+    print("Computing swept volume...")
+    igl.copyleft.swept_volume(V, F, transform, time_steps, grid_size, isolevel, SV, SF)
+    print("...finished.")
+
+    # Plot the generated mesh
+    viewer = igl.viewer.Viewer()
+    viewer.data.set_mesh(V, F)
+    viewer.data.set_face_based(True)
+    viewer.core.is_animating = not show_swept_volume
+    viewer.callback_pre_draw = pre_draw
+    viewer.callback_key_down = key_down
+    viewer.launch()