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Increasing output PLY file #67

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Increasing output PLY file #67

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7c88dc6
output PLY file
jackylovechina Dec 3, 2020
384b304
Update mpm_solver.py
jackylovechina Dec 3, 2020
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8 changes: 7 additions & 1 deletion demo/demo_3d_letters2.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,8 @@
with_gui = True
write_to_disk = True

w2ply = True

# Try to run on GPU
ti.init(arch=ti.cuda,
kernel_profiler=True,
Expand All @@ -22,7 +24,7 @@
if with_gui:
gui = ti.GUI("MLS-MPM", res=512, background_color=0x112F41)

if write_to_disk:
if write_to_disk or w2ply:
output_dir = create_output_folder('./sim')


Expand Down Expand Up @@ -117,5 +119,9 @@ def visualize(particles):

if write_to_disk:
mpm.write_particles(f'{output_dir}/{frame:05d}.npz')

if w2ply:
mpm.write_ply(output_dir,frame + 1)

print(f'Frame total time {time.time() - t:.3f}')
print(f'Total running time {time.time() - start_t:.3f}')
64 changes: 64 additions & 0 deletions engine/mpm_solver.py
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Original file line number Diff line number Diff line change
Expand Up @@ -673,6 +673,70 @@ def write_particles(self, fn):
p.start()

self.writers.append(p)

def write_ply(self,fn,frame):
p_info = self.particle_info()

p_pos = p_info['position']
p_mat = p_info['material']
p_null = np.array([[np.nan]])

arr_water = np.where(p_mat == 0)
arr_elast = np.where(p_mat == 1)
arr_snow = np.where(p_mat == 2)
arr_sand = np.where(p_mat == 3)

series_prefix_0 = fn + "/water.ply"
series_prefix_1 = fn + "/elast.ply"
series_prefix_2 = fn + "/snow.ply"
series_prefix_3 = fn + "/sand.ply"

print("num_particles：{0}，elast：{1}，water：{2}，snow：{3}，sand：{4}，out_particles：{5}".format(self.n_particles,len(arr_elast[0]) ,len(arr_water[0]) ,len(arr_snow[0]) ,len(arr_sand[0]) ,len(arr_water[0]) + len(arr_elast[0]) + len(arr_snow[0]) + len(arr_sand[0])),end='\n')

if len(arr_water[0]) > 0:
min_water = np.min(arr_water)
max_water = np.max(arr_water)
writer_0 = ti.PLYWriter(num_vertices=max_water - min_water + 1)
writer_0.add_vertex_pos(p_pos[min_water: max_water + 1, 0],p_pos[min_water: max_water + 1, 1],p_pos[min_water: max_water + 1, 2])
writer_0.export_frame_ascii(frame,series_prefix_0)
else:
writer_0 = ti.PLYWriter(num_vertices=1)
writer_0.add_vertex_pos(p_null[ : , 0],p_null[ : , 0],p_null[ : , 0])
writer_0.export_frame_ascii(frame,series_prefix_0)

if len(arr_elast[0]) > 0:
min_elast = np.min(arr_elast)
max_elast = np.max(arr_elast)
writer_1 = ti.PLYWriter(num_vertices=max_elast - min_elast + 1)
writer_1.add_vertex_pos(p_pos[min_elast: max_elast + 1, 0],p_pos[min_elast: max_elast + 1, 1],p_pos[min_elast: max_elast + 1, 2])
writer_1.export_frame_ascii(frame,series_prefix_1)
else:
writer_1 = ti.PLYWriter(num_vertices=1)
writer_1.add_vertex_pos(p_null[ : , 0],p_null[ : , 0],p_null[ : , 0])
writer_1.export_frame_ascii(frame,series_prefix_1)

if len(arr_snow[0]) > 0:
min_snow = np.min(arr_snow)
max_snow = np.max(arr_snow)
writer_2 = ti.PLYWriter(num_vertices=max_snow - min_snow + 1)
writer_2.add_vertex_pos(p_pos[min_snow: max_snow + 1, 0],p_pos[min_snow: max_snow + 1, 1],p_pos[min_snow: max_snow + 1, 2])
writer_2.export_frame_ascii(frame,series_prefix_2)
else:
writer_2 = ti.PLYWriter(num_vertices=1)
writer_2.add_vertex_pos(p_null[ : , 0],p_null[ : , 0],p_null[ : , 0])
writer_2.export_frame_ascii(frame,series_prefix_2)

if len(arr_sand[0]) > 0:
min_sand = np.min(arr_sand)
max_sand = np.max(arr_sand)
writer_3 = ti.PLYWriter(num_vertices=max_sand - min_sand + 1)
writer_3.add_vertex_pos(p_pos[min_sand: max_sand + 1, 0],p_pos[min_sand: max_sand + 1, 1],p_pos[min_sand: max_sand + 1, 2])
writer_3.export_frame_ascii(frame,series_prefix_3)
else:
writer_3 = ti.PLYWriter(num_vertices=1)
writer_3.add_vertex_pos(p_null[ : , 0],p_null[ : , 0],p_null[ : , 0])
writer_3.export_frame_ascii(frame,series_prefix_3)


def flush(self):
for p in self.writers:
Expand Down