Lerking/Hands-On-GPU-Programming-with-CUDA-C-and-Python-3.x-Second-Edition
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Update nbody.py

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This commit is contained in:
Brian Tuomanen
2020-02-17 22:15:58 -08:00
committed by GitHub
parent 633a9693ba
commit c927dae20b
1 changed files with 4 additions and 4 deletions
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Chapter03/nbody.py
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@@ -51,8 +51,8 @@ t=np.float32(0.005)
in_x = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) + .5 )) in_x = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) + .5 ))
in_y = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) + .5)) in_y = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) + .5))
in_v_x = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) - .5)) #gpuarray.zeros_like(in_x) in_v_x = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) - .5))
in_v_y = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) - .5))#gpuarray.zeros_like(in_y) in_v_y = gpuarray.to_gpu(np.float32(np.random.random(NUM_BODIES) - .5))
out_x = gpuarray.empty_like(in_x) out_x = gpuarray.empty_like(in_x)
out_y = gpuarray.empty_like(in_y) out_y = gpuarray.empty_like(in_y)
@@ -82,10 +82,10 @@ def update_gpu(frameNum, img, in_x, in_y, in_v_x, in_v_y, out_x, out_y, out_v_x,
if frameNum % 2 == 0: if frameNum % 2 == 0:
nbody_ker(in_x,in_y,in_v_x,in_v_y,out_x,out_y,out_v_x,out_v_y,m,t,NUM_BODIES) nbody_ker(in_x,in_y,in_v_x,in_v_y,out_x,out_y,out_v_x,out_v_y,m,t,NUM_BODIES)
img.set_data(xy_to_img(out_x.get(), out_y.get(), masses))
else: else:
nbody_ker(out_x,out_y,out_v_x,out_v_y,in_x,in_y,in_v_x,in_v_y,m,t,NUM_BODIES) nbody_ker(out_x,out_y,out_v_x,out_v_y,in_x,in_y,in_v_x,in_v_y,m,t,NUM_BODIES)
img.set_data(xy_to_img(in_x.get(), in_y.get(), masses))
img.set_data(xy_to_img(out_x.get(), out_y.get(), masses))
return img return img