def main():
# Load a mesh in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "bumpy.off", V, F)
# Create a Vector Field
temp_field = igl.eigen.MatrixXd()
b = igl.eigen.MatrixXi([[0]])
bc = igl.eigen.MatrixXd([[1, 1, 1]])
S = igl.eigen.MatrixXd() # unused
degree = 3
igl.comiso.nrosy(V, F, b, bc, igl.eigen.MatrixXi(), igl.eigen.MatrixXd(),
igl.eigen.MatrixXd(), 1, 0.5, temp_field, S)
temp_field2 = igl.eigen.MatrixXd()
representative_to_nrosy(V, F, temp_field, degree, temp_field2)
# Initialize tracer
igl.streamlines_init(V, F, temp_field2, treat_as_symmetric, data, state)
# Setup viewer
viewer = igl.glfw.Viewer()
viewer.data().set_mesh(V, F)
viewer.callback_pre_draw = pre_draw
viewer.callback_key_down = key_down
viewer.core.show_lines = False
viewer.core.is_animating = False
viewer.core.animation_max_fps = 30.0
# Paint mesh grayish
C = igl.eigen.MatrixXd()
C.setConstant(viewer.data().V.rows(), 3, .9)
viewer.data().set_colors(C)
# Draw vector field on sample points
state0 = state.copy()
igl.streamlines_next(V, F, data, state0)
v = state0.end_point - state0.start_point
v = v.rowwiseNormalized()
viewer.data().add_edges(state0.start_point, state0.start_point + 0.059 * v,
igl.eigen.MatrixXd([[1.0, 1.0, 1.0]]))
print("Press [space] to toggle animation")
viewer.launch()
def main():
# Load a mesh in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "bumpy.off", V, F)
# Create a Vector Field
temp_field = igl.eigen.MatrixXd()
b = igl.eigen.MatrixXi([[0]])
bc = igl.eigen.MatrixXd([[1, 1, 1]])
S = igl.eigen.MatrixXd() # unused
degree = 3
igl.comiso.nrosy(V, F, b, bc, igl.eigen.MatrixXi(), igl.eigen.MatrixXd(), igl.eigen.MatrixXd(), 1, 0.5, temp_field, S)
temp_field2 = igl.eigen.MatrixXd()
representative_to_nrosy(V, F, temp_field, degree, temp_field2)
# Initialize tracer
igl.streamlines_init(V, F, temp_field2, treat_as_symmetric, data, state)
# Setup viewer
viewer = igl.viewer.Viewer()
viewer.data.set_mesh(V, F)
viewer.callback_pre_draw = pre_draw
viewer.callback_key_down = key_down
viewer.core.show_lines = False
viewer.core.is_animating = False
viewer.core.animation_max_fps = 30.0
# Paint mesh grayish
C = igl.eigen.MatrixXd()
C.setConstant(viewer.data.V.rows(), 3, .9)
viewer.data.set_colors(C)
# Draw vector field on sample points
state0 = state.copy()
igl.streamlines_next(V, F, data, state0)
v = state0.end_point - state0.start_point
v = v.rowwiseNormalized()
viewer.data.add_edges(state0.start_point,
state0.start_point + 0.059 * v,
igl.eigen.MatrixXd([[1.0, 1.0, 1.0]]))
print("Press [space] to toggle animation")
viewer.launch()
def pre_draw(viewer):
if not viewer.core.is_animating:
return False
global anim_t
global start_point
global end_point
igl.streamlines_next(V, F, data, state)
value = (anim_t % 100) / 100.0
if value > 0.5:
value = 1 - value
value /= 0.5
r, g, b = igl.parula(value)
viewer.data.add_edges(state.start_point, state.end_point, igl.eigen.MatrixXd([[r, g, b]]))
anim_t += anim_t_dir
return False
def pre_draw(viewer):
if not viewer.core().is_animating:
return False
global anim_t
global start_point
global end_point
igl.streamlines_next(V, F, data, state)
value = (anim_t % 100) / 100.0
if value > 0.5:
value = 1 - value
value /= 0.5
r, g, b = igl.parula(value)
viewer.data().add_edges(state.start_point, state.end_point, igl.eigen.MatrixXd([[r, g, b]]))
anim_t += anim_t_dir
return False
