Added tutorial 706

2016-07-06 20:38:33 +02:00
parent 76c80d3c0b
commit 3acc7106d4
11 changed files with 216 additions and 10 deletions
@@ -6,7 +6,7 @@ import pyigl as igl

 from shared import TUTORIAL_SHARED_PATH, check_dependencies, print_usage

-dependencies = []
+dependencies = ["viewer"]
 check_dependencies(dependencies)


@@ -6,7 +6,7 @@ import pyigl as igl

 from shared import TUTORIAL_SHARED_PATH, check_dependencies, print_usage

-dependencies = ["copyleft"]
+dependencies = ["copyleft", "viewer"]
 check_dependencies(dependencies)


@@ -0,0 +1,78 @@
+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, print_usage
+
+dependencies = ["embree", "viewer"]
+check_dependencies(dependencies)
+
+
+def key_down(viewer, key, modifier):
+    global facetwise, is_showing_reoriented, FF
+    if key == ord('F') or key == ord('f'):
+        facetwise = (facetwise + 1) % 2
+    elif key == ord('S') or key == ord('s'):
+        scramble_colors()
+    elif key == ord(' '):
+        is_showing_reoriented = ~is_showing_reoriented
+
+    viewer.data.clear()
+    viewer.data.set_mesh(V, FF[facetwise] if is_showing_reoriented else F)
+    viewer.data.set_colors(RGBcolors[facetwise])
+
+    return True
+
+def scramble_colors():
+    global C, viewer, RGBcolors
+    for p in range(2):
+        R = igl.eigen.MatrixXi()
+        igl.randperm(C[p].maxCoeff() + 1, R)
+        C[p] = igl.slice(R, igl.eigen.MatrixXi(C[p]))
+        HSV = igl.eigen.MatrixXd(C[p].rows(), 3)
+        HSV.setCol(0, 360.0 * C[p].castdouble() / C[p].maxCoeff())
+        HSVright = igl.eigen.MatrixXd(HSV.rows(), 2)
+        HSVright.setConstant(1.0)
+        HSV.setRightCols(2, HSVright)
+        igl.hsv_to_rgb(HSV, RGBcolors[p])
+    viewer.data.set_colors(RGBcolors[facetwise])
+
+
+
+if __name__ == "__main__":
+    keys = {"space": "toggle between original and reoriented faces",
+            "F,f": "toggle between patchwise and facetwise reorientation",
+            "S,s": "scramble colors"}
+    print_usage(keys)
+
+    V = igl.eigen.MatrixXd()
+    F = igl.eigen.MatrixXi()
+    C = [igl.eigen.MatrixXi(), igl.eigen.MatrixXi()]
+    RGBcolors = [igl.eigen.MatrixXd(), igl.eigen.MatrixXd()]
+    FF = [igl.eigen.MatrixXi(), igl.eigen.MatrixXi()]
+    is_showing_reoriented = False
+    facetwise = 0
+
+    igl.read_triangle_mesh(TUTORIAL_SHARED_PATH + "truck.obj", V, F)
+
+    # Compute patches
+    for p in range(2):
+        I = igl.eigen.MatrixXi()
+        igl.embree.reorient_facets_raycast(V, F, F.rows() * 100, 10, p == 1, False, False, I, C[p])
+        # apply reorientation
+        FF[p].conservativeResize(F.rows(), F.cols())
+        for i in range(I.rows()):
+            if I[i]:
+                FF[p].setRow(i, F.row(i).rowwiseReverse())
+            else:
+                FF[p].setRow(i, F.row(i))
+
+    # Plot the generated mesh
+    viewer = igl.viewer.Viewer()
+    viewer.data.set_mesh(V, FF[facetwise] if is_showing_reoriented else F)
+    viewer.data.set_face_based(True)
+    scramble_colors()
+    viewer.callback_key_down = key_down
+    viewer.launch()