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import numpy as np
import numpy.ma as ma
from pycuda.tools import make_default_context
from pycuda.compiler import SourceModule
import pycuda.driver as cuda
from pycuda import gpuarray
from copy import copy
from itertools import izip
import src
from geometry import standard_wavelengths
from color import map_to_color
cuda.init()
def format_size(size):
if size < 1e3:
return '%.1f%s' % (size, ' ')
elif size < 1e6:
return '%.1f%s' % (size/1e3, 'K')
elif size < 1e9:
return '%.1f%s' % (size/1e6, 'M')
else:
return '%.1f%s' % (size/1e9, 'G')
def format_array(name, array):
return '%-15s %6s %6s' % \
(name, format_size(len(array)), format_size(array.nbytes))
class GPU(object):
def __init__(self):
self.context = make_default_context()
print 'device %s' % self.context.get_device().name()
self.module = SourceModule(src.kernel, options=['-I' + src.dir], no_extern_c=True, cache_dir=False)
def print_device_usage(self):
print 'device usage:'
print format_array('vertices', self.vertices_gpu)
print format_array('triangles', self.triangles_gpu)
print format_array('lower_bounds', self.lower_bounds_gpu)
print format_array('upper_bounds', self.upper_bounds_gpu)
print format_array('node_map', self.node_map_gpu)
print format_array('node_length', self.node_length_gpu)
print '%-15s %6s %6s' % ('total', '', format_size(self.vertices_gpu.nbytes + self.triangles_gpu.nbytes + self.lower_bounds_gpu.nbytes + self.upper_bounds_gpu.nbytes + self.node_map_gpu.nbytes + self.node_length_gpu.nbytes))
def load_geometry(self, geometry):
if not hasattr(geometry, 'mesh'):
geometry.build(bits=8)
set_wavelength_range = self.module.get_function('set_wavelength_range')
set_wavelength_range(np.float32(standard_wavelengths[0]), np.float32(standard_wavelengths[-1]), np.float32(standard_wavelengths[1]-standard_wavelengths[0]), np.uint32(standard_wavelengths.size), block=(1,1,1), grid=(1,1))
set_material = self.module.get_function('set_material')
self.materials = []
for i in range(len(geometry.unique_materials)):
material = copy(geometry.unique_materials[i])
if material is None:
raise Exception('one or more triangles is missing a material.')
material.refractive_index_gpu = gpuarray.to_gpu(np.interp(standard_wavelengths, material.refractive_index[:,0], material.refractive_index[:,1]).astype(np.float32))
material.absorption_length_gpu = gpuarray.to_gpu(np.interp(standard_wavelengths, material.absorption_length[:,0], material.absorption_length[:,1]).astype(np.float32))
material.scattering_length_gpu = gpuarray.to_gpu(np.interp(standard_wavelengths, material.scattering_length[:,0], material.scattering_length[:,1]).astype(np.float32))
set_material(np.int32(i), material.refractive_index_gpu, material.absorption_length_gpu, material.scattering_length_gpu, block=(1,1,1), grid=(1,1))
self.materials.append(material)
set_surface = self.module.get_function('set_surface')
self.surfaces = []
for i in range(len(geometry.unique_surfaces)):
surface = copy(geometry.unique_surfaces[i])
if surface is None:
continue
surface.detect_gpu = gpuarray.to_gpu(np.interp(standard_wavelengths, surface.detect[:,0], surface.detect[:,1]).astype(np.float32))
surface.absorb_gpu = gpuarray.to_gpu(np.interp(standard_wavelengths, surface.absorb[:,0], surface.absorb[:,1]).astype(np.float32))
surface.reflect_diffuse_gpu = gpuarray.to_gpu(np.interp(standard_wavelengths, surface.reflect_diffuse[:,0], surface.reflect_diffuse[:,1]).astype(np.float32))
surface.reflect_specular_gpu = gpuarray.to_gpu(np.interp(standard_wavelengths, surface.reflect_specular[:,0], surface.reflect_specular[:,1]).astype(np.float32))
set_surface(np.int32(i), surface.detect_gpu, surface.absorb_gpu, surface.reflect_diffuse_gpu, surface.reflect_specular_gpu, block=(1,1,1), grid=(1,1))
self.surfaces.append(surface)
self.vertices_gpu = gpuarray.to_gpu(geometry.mesh.vertices.astype(np.float32).view(gpuarray.vec.float3))
triangles = \
np.empty(len(geometry.mesh.triangles), dtype=gpuarray.vec.uint4)
triangles['x'] = geometry.mesh.triangles[:,0]
triangles['y'] = geometry.mesh.triangles[:,1]
triangles['z'] = geometry.mesh.triangles[:,2]
triangles['w'] = ((geometry.material1_index & 0xff) << 24) | ((geometry.material2_index & 0xff) << 16) | ((geometry.surface_index & 0xff) << 8)
self.triangles_gpu = gpuarray.to_gpu(triangles)
lower_bounds_float4 = np.empty(geometry.lower_bounds.shape[0], dtype=gpuarray.vec.float4)
lower_bounds_float4['x'] = geometry.lower_bounds[:,0]
lower_bounds_float4['y'] = geometry.lower_bounds[:,1]
lower_bounds_float4['z'] = geometry.lower_bounds[:,2]
self.lower_bounds_gpu = gpuarray.to_gpu(lower_bounds_float4)
upper_bounds_float4 = np.empty(geometry.upper_bounds.shape[0], dtype=gpuarray.vec.float4)
upper_bounds_float4['x'] = geometry.upper_bounds[:,0]
upper_bounds_float4['y'] = geometry.upper_bounds[:,1]
upper_bounds_float4['z'] = geometry.upper_bounds[:,2]
self.upper_bounds_gpu = gpuarray.to_gpu(upper_bounds_float4)
self.colors_gpu = gpuarray.to_gpu(geometry.colors.astype(np.uint32))
self.node_map_gpu = gpuarray.to_gpu(geometry.node_map.astype(np.uint32))
self.node_length_gpu = gpuarray.to_gpu(geometry.node_length.astype(np.uint32))
self.solid_id_map_gpu = gpuarray.to_gpu(geometry.solid_id.astype(np.uint32))
set_global_mesh_variables = self.module.get_function('set_global_mesh_variables')
set_global_mesh_variables(self.triangles_gpu, self.vertices_gpu, self.colors_gpu, np.uint32(geometry.node_map.size-1), np.uint32(geometry.first_node), block=(1,1,1), grid=(1,1))
self.lower_bounds_tex = self.module.get_texref('lower_bounds')
self.upper_bounds_tex = self.module.get_texref('upper_bounds')
self.node_map_tex = self.module.get_texref('node_map')
self.node_length_tex = self.module.get_texref('node_length')
self.lower_bounds_tex.set_address(self.lower_bounds_gpu.gpudata, self.lower_bounds_gpu.nbytes)
self.upper_bounds_tex.set_address(self.upper_bounds_gpu.gpudata, self.upper_bounds_gpu.nbytes)
self.node_map_tex.set_address(self.node_map_gpu.gpudata, self.node_map_gpu.nbytes)
self.node_length_tex.set_address(self.node_length_gpu.gpudata, self.node_length_gpu.nbytes)
self.lower_bounds_tex.set_format(cuda.array_format.FLOAT, 4)
self.upper_bounds_tex.set_format(cuda.array_format.FLOAT, 4)
self.node_map_tex.set_format(cuda.array_format.UNSIGNED_INT32, 1)
self.node_length_tex.set_format(cuda.array_format.UNSIGNED_INT32, 1)
self.print_device_usage()
def color_solids(self, solid_ids, colors):
solid_id_map = self.solid_id_map_gpu.get()
triangle_colors = self.colors_gpu.get()
for i, color in izip(solid_ids, colors):
triangle_colors[solid_id_map == i] = color
self.colors_gpu.set(triangle_colors)
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