mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
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Andrej730
502 lines
19 KiB
Python
502 lines
19 KiB
Python
# BlenderBIM Add-on - OpenBIM Blender Add-on
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# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of BlenderBIM Add-on.
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#
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# BlenderBIM Add-on is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# BlenderBIM Add-on is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with BlenderBIM Add-on. If not, see <http://www.gnu.org/licenses/>.
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import bpy
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import bmesh
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import ifcopenshell
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import blenderbim.core.tool
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import blenderbim.tool as tool
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from test.bim.bootstrap import NewFile
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from blenderbim.tool.loader import Loader as subject
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import numpy as np
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from ifcopenshell.util.shape_builder import ShapeBuilder, V
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from mathutils import Vector
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from pathlib import Path
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class TestImplementsTool(NewFile):
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def test_run(self):
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assert isinstance(subject(), blenderbim.core.tool.Loader)
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class TestCreatingStyles(NewFile):
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def test_create_surface_style_with_textures_from_data(self):
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# this case occurs when we edit shader properties without saving them to IFC
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bpy.ops.bim.create_project()
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bpy.ops.mesh.primitive_cube_add(size=10, location=(0, 0, 4))
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obj = bpy.data.objects["Cube"]
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bpy.ops.bim.assign_class(ifc_class="IfcActuator", predefined_type="ELECTRICACTUATOR", userdefined_type="")
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material = bpy.data.materials.new(name="Material")
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obj.data.materials.append(None) # new slot
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obj.material_slots[0].material = material
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bpy.ops.bim.add_style()
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style_data = {
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"ReflectanceMethod": "NOTDEFINED",
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"DiffuseColour": ("IfcColourRgb", (0.5, 0.5, 0.5)),
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"SurfaceColour": (0.3, 0.3, 0.3),
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"Transparency": 0.3,
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"SpecularHighlight": 0.4,
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"SpecularColour": ("IfcNormalisedRatioMeasure", 0.03),
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}
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texture_data = [
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{
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"Mode": "DIFFUSE",
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"URLReference": "blenderbim/test/files/image.jpg",
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"type": "IfcImageTexture",
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"uv_mode": "Generated",
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},
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]
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subject.create_surface_style_rendering(material, style_data)
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subject.create_surface_style_with_textures(material, style_data, texture_data)
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used_node_types = set([n.type for n in material.node_tree.nodes[:]])
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assert used_node_types == set((["OUTPUT_MATERIAL", "BSDF_PRINCIPLED", "TEX_IMAGE", "TEX_COORD"]))
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bsdf = tool.Blender.get_material_node(material, "BSDF_PRINCIPLED")
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alpha = 1 - style_data["Transparency"]
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diffuse_color = style_data["SurfaceColour"] + (alpha,)
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assert np.allclose(material.diffuse_color[:], diffuse_color)
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base_color = style_data["DiffuseColour"][1] + (1.0,)
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assert np.allclose(bsdf.inputs["Base Color"].default_value[:], base_color)
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assert np.isclose(bsdf.inputs["Alpha"].default_value, alpha)
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assert np.isclose(bsdf.inputs["Roughness"].default_value, style_data["SpecularHighlight"])
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assert np.isclose(bsdf.inputs["Metallic"].default_value, style_data["SpecularColour"][1])
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image_node = tool.Blender.get_material_node(material, "TEX_IMAGE")
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assert image_node.outputs["Color"].links[0].to_socket.name == "Base Color"
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assert image_node.inputs["Vector"].links[0].from_socket.name == "Generated"
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original_path = Path(tool.Ifc.get_path()).parent / Path(texture_data[0]["URLReference"])
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loaded_filepath = Path(image_node.image.filepath)
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assert original_path == loaded_filepath
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def test_create_surface_style_with_textures_from_ifc(self):
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# this case occurs when we edit shader properties without saving them to IFC
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bpy.ops.bim.create_project()
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style = tool.Ifc.run("style.add_style", name="test")
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material = bpy.data.materials.new(style.Name)
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tool.Ifc.link(style, material)
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get_color = lambda value: {color: value for color in ("Red", "Green", "Blue")}
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rendering_attributes = {
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"ReflectanceMethod": "NOTDEFINED",
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"DiffuseColour": get_color(0.5),
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"SurfaceColour": get_color(0.3),
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"Transparency": 0.3,
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"SpecularHighlight": {"IfcSpecularRoughness": 0.4},
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"SpecularColour": 0.03,
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}
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rendering_style = tool.Ifc.run(
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"style.add_surface_style",
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style=style,
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ifc_class="IfcSurfaceStyleRendering",
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attributes=rendering_attributes,
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)
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textures = [
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{
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"URLReference": "blenderbim/test/files/image.jpg",
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"Mode": "DIFFUSE",
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"RepeatS": True,
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"RepeatT": True,
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"uv_mode": "Generated",
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}
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]
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textures = tool.Ifc.run("style.add_surface_textures", textures=textures, uv_maps=[])
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texture_style = tool.Ifc.run(
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"style.add_surface_style",
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style=style,
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ifc_class="IfcSurfaceStyleWithTextures",
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attributes={"Textures": textures},
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)
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subject.create_surface_style_rendering(material, rendering_style)
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subject.create_surface_style_with_textures(material, rendering_style, texture_style)
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used_node_types = set([n.type for n in material.node_tree.nodes[:]])
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assert used_node_types == set((["OUTPUT_MATERIAL", "BSDF_PRINCIPLED", "TEX_IMAGE", "TEX_COORD"]))
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color_to_tuple = lambda x: (x.Red, x.Green, x.Blue)
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bsdf = tool.Blender.get_material_node(material, "BSDF_PRINCIPLED")
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alpha = 1 - rendering_style.Transparency
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diffuse_color = color_to_tuple(rendering_style.SurfaceColour) + (alpha,)
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assert np.allclose(material.diffuse_color[:], diffuse_color)
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base_color = color_to_tuple(rendering_style.DiffuseColour) + (1.0,)
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assert np.allclose(bsdf.inputs["Base Color"].default_value[:], base_color)
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assert np.isclose(bsdf.inputs["Alpha"].default_value, alpha)
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assert np.isclose(bsdf.inputs["Roughness"].default_value, rendering_style.SpecularHighlight.wrappedValue)
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assert np.isclose(bsdf.inputs["Metallic"].default_value, rendering_style.SpecularColour.wrappedValue)
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image_node = tool.Blender.get_material_node(material, "TEX_IMAGE")
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assert image_node.outputs["Color"].links[0].to_socket.name == "Base Color"
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assert image_node.inputs["Vector"].links[0].from_socket.name == "Generated"
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original_path = Path(tool.Ifc.get_path()).parent / Path(textures[0].URLReference)
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loaded_filepath = Path(image_node.image.filepath)
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assert original_path == loaded_filepath
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def test_create_surface_style_with_textures_from_ifc_blob_image(self):
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# this case occurs when we edit shader properties without saving them to IFC
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bpy.ops.bim.create_project()
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ifc_file = tool.Ifc.get()
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style = tool.Ifc.run("style.add_style", name="test")
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material = bpy.data.materials.new(style.Name)
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tool.Ifc.link(style, material)
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get_color = lambda value: {color: value for color in ("Red", "Green", "Blue")}
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rendering_attributes = {
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"ReflectanceMethod": "NOTDEFINED",
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"DiffuseColour": get_color(0.5),
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"SurfaceColour": get_color(0.3),
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"Transparency": 0.3,
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"SpecularHighlight": {"IfcSpecularRoughness": 0.4},
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"SpecularColour": 0.03,
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}
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rendering_style = tool.Ifc.run(
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"style.add_surface_style",
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style=style,
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ifc_class="IfcSurfaceStyleRendering",
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attributes=rendering_attributes,
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)
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def get_png_raster_code():
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import base64
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import zlib
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import struct
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# https://blender.stackexchange.com/questions/62072/does-blender-have-a-method-to-a-get-png-formatted-bytearray-for-an-image-via-pyt
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width = 2
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height = 2
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# 2x2 image:
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# R G
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# B W
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# fmt: off
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pixels = (
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1,0,0,1,
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0,1,0,1,
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0,0,1,1,
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1,1,1,1,
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)
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# fmt: on
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buf = bytearray([int(p * 255) for p in pixels])
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# add null bytes at the start
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width_byte_4 = width * 4
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raw_data = b"".join(
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b"\x00" + buf[span : span + width_byte_4] for span in range(0, height * width_byte_4, width_byte_4)
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)
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def png_pack(png_tag, data):
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header = png_tag + data
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chunk = struct.pack("!I", len(data))
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chunk += header
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chunk += struct.pack("!I", 0xFFFFFFFF & zlib.crc32(header))
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return chunk
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png_bytes = b"".join(
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[
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b"\x89PNG\r\n\x1a\n",
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png_pack(b"IHDR", struct.pack("!2I5B", width, height, 8, 6, 0, 0, 0)),
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png_pack(b"IDAT", zlib.compress(raw_data, 9)),
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png_pack(b"IEND", b""),
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]
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)
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raster_code = "".join(["{:08b}".format(x) for x in png_bytes])
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return raster_code
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texture_data = {
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"RasterCode": get_png_raster_code(),
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"RasterFormat": "PNG",
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"Mode": "DIFFUSE",
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"RepeatS": True,
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"RepeatT": True,
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}
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# setup texture manually as `style.add_surface_textures` doesn't support non-IfcImageTexture textures
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textures = [ifc_file.create_entity("IfcBlobTexture", **texture_data)]
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# setup UV
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ifc_file.create_entity("IfcTextureCoordinateGenerator", Maps=textures, Mode="COORD")
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texture_style = tool.Ifc.run(
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"style.add_surface_style",
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style=style,
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ifc_class="IfcSurfaceStyleWithTextures",
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attributes={"Textures": textures},
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)
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subject.create_surface_style_rendering(material, rendering_style)
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subject.create_surface_style_with_textures(material, rendering_style, texture_style)
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used_node_types = set([n.type for n in material.node_tree.nodes[:]])
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assert used_node_types == set((["OUTPUT_MATERIAL", "BSDF_PRINCIPLED", "TEX_IMAGE", "TEX_COORD"]))
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image_node = tool.Blender.get_material_node(material, "TEX_IMAGE")
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assert image_node.outputs["Color"].links[0].to_socket.name == "Base Color"
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assert image_node.inputs["Vector"].links[0].from_socket.name == "Generated"
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assert image_node.image.filepath == ""
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# fmt: off
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# blender has reversed pixels rows order
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assert image_node.image.pixels[:] == (0.0, 0.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0)
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# fmt: on
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def test_create_surface_style_with_textures_from_ifc_pixel_image(self):
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# fmt: off
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# blender has reversed pixels rows order
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# 2x2 image:
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# R G
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# B W
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ifc_pixel_data = {
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1: (
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0.7,
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1.0,
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0.5,
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0.6,
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),
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2: (
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0.7, 0.5,
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1.0, 0.5,
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0.5, 0.5,
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0.6, 0.5
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),
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3: (
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0, 0, 0.7,
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1, 1, 1,
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0.5, 0, 0,
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0, 0.6, 0,
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),
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4: (
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0, 0, 0.7, 0.5,
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1, 1, 1, 0.5,
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0.5, 0, 0, 0.5,
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0, 0.6, 0, 0.5,
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)
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}
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expected_pixel_data = {
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1: (
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0.7, 0.7, 0.7, 1.0,
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1.0, 1.0, 1.0, 1.0,
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0.5, 0.5, 0.5, 1.0,
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0.6, 0.6, 0.6, 1.0,
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),
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2: (
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0.7, 0.7, 0.7, 0.5,
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1.0, 1.0, 1.0, 0.5,
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0.5, 0.5, 0.5, 0.5,
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0.6, 0.6, 0.6, 0.5,
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),
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3: (
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0, 0, 0.7, 1.0,
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1, 1, 1, 1.0,
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0.5, 0, 0, 1.0,
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0, 0.6, 0, 1.0,
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),
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4: (
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0, 0, 0.7, 0.5,
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1, 1, 1, 0.5,
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0.5, 0, 0, 0.5,
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0, 0.6, 0, 0.5,
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)
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}
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# fmt: on
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for i in range(1, 5):
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self.run_test_create_surface_style_with_textures_from_ifc_pixel_image(
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i, ifc_pixel_data[i], expected_pixel_data[i]
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)
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def run_test_create_surface_style_with_textures_from_ifc_pixel_image(
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self, n_components, ifc_pixel_data, expected_pixel_data
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):
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# this case occurs when we edit shader properties without saving them to IFC
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bpy.ops.bim.create_project()
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ifc_file = tool.Ifc.get()
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style = tool.Ifc.run("style.add_style", name="test")
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material = bpy.data.materials.new(style.Name)
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tool.Ifc.link(style, material)
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get_color = lambda value: {color: value for color in ("Red", "Green", "Blue")}
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rendering_attributes = {
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"ReflectanceMethod": "NOTDEFINED",
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"DiffuseColour": get_color(0.5),
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"SurfaceColour": get_color(0.3),
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"Transparency": 0.3,
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"SpecularHighlight": {"IfcSpecularRoughness": 0.4},
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"SpecularColour": 0.03,
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}
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rendering_style = tool.Ifc.run(
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"style.add_surface_style",
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style=style,
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ifc_class="IfcSurfaceStyleRendering",
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attributes=rendering_attributes,
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)
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def get_pixels_binary():
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# just 4 pixels - red, green, blue, white
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# IfcPixelTexture as Blender has reversed order of pixels rows: (0,0) - bottom left of the image
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# https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPixelTexture.htm
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# fmt: off
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pixels = np.array(ifc_pixel_data) * 255
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pixels = pixels.reshape((4, n_components))
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return ["".join(["{:08b}".format(int(i)) for i in pixel]) for pixel in pixels]
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texture_data = {
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"Pixel": get_pixels_binary(),
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"ColourComponents": n_components,
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"Width": 2,
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"Height": 2,
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"Mode": "DIFFUSE",
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"RepeatS": True,
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"RepeatT": True,
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}
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# setup texture manually as `style.add_surface_textures` doesn't support non-IfcImageTexture textures
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textures = [ifc_file.create_entity("IfcPixelTexture", **texture_data)]
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# setup UV
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ifc_file.create_entity("IfcTextureCoordinateGenerator", Maps=textures, Mode="COORD")
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texture_style = tool.Ifc.run(
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"style.add_surface_style",
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style=style,
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ifc_class="IfcSurfaceStyleWithTextures",
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attributes={"Textures": textures},
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)
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subject.create_surface_style_rendering(material, rendering_style)
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subject.create_surface_style_with_textures(material, rendering_style, texture_style)
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used_node_types = set([n.type for n in material.node_tree.nodes[:]])
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assert used_node_types == set((["OUTPUT_MATERIAL", "BSDF_PRINCIPLED", "TEX_IMAGE", "TEX_COORD"]))
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image_node = tool.Blender.get_material_node(material, "TEX_IMAGE")
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assert image_node.outputs["Color"].links[0].to_socket.name == "Base Color"
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assert image_node.inputs["Vector"].links[0].from_socket.name == "Generated"
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assert image_node.image.filepath == ""
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assert np.allclose(
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image_node.image.pixels[:], expected_pixel_data, atol=0.01
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), f"Failed to match pixels for {n_components}.\nBlender pixel_data: {image_node.image.pixels[:]}.\nExpected data: {expected_pixel_data}"
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class TestLoadingIndexedTextureMap(NewFile):
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def test_run(self):
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bpy.context.scene.unit_settings.length_unit = "MILLIMETERS"
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bpy.ops.bim.create_project()
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# TODO: replace with loading geometry from IFC
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# create a cube without uv and triangulate it
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mesh = bpy.data.meshes.new("Cube")
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bm = tool.Blender.get_bmesh_for_mesh(mesh, clean=True)
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bmesh.ops.create_cube(bm, size=2.0, calc_uvs=False)
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bmesh.ops.triangulate(bm, faces=bm.faces[:])
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tool.Blender.apply_bmesh(mesh, bm)
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ifc_file = tool.Ifc.get()
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builder = ShapeBuilder(ifc_file)
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# tesselated cube
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points = (
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V(-1000, -1000, -1000),
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V(-1000, -1000, 1000),
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V(-1000, 1000, -1000),
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V(-1000, 1000, 1000),
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V(1000, -1000, -1000),
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V(1000, -1000, 1000),
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V(1000, 1000, -1000),
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V(1000, 1000, 1000),
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)
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faces = (
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(1, 2, 0),
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(3, 6, 2),
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(7, 4, 6),
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(5, 0, 4),
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(6, 0, 2),
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(3, 5, 7),
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(1, 3, 2),
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(3, 7, 6),
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(7, 5, 4),
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(5, 1, 0),
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(6, 4, 0),
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(3, 1, 5),
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)
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face_set = builder.polygonal_face_set(points, faces)
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|
|
|
uv_indices = (
|
|
(1, 2, 3),
|
|
(4, 5, 6),
|
|
(7, 8, 9),
|
|
(10, 11, 12),
|
|
(13, 14, 15),
|
|
(16, 17, 18),
|
|
(19, 20, 21),
|
|
(22, 23, 24),
|
|
(25, 26, 27),
|
|
(28, 29, 30),
|
|
(31, 32, 33),
|
|
(34, 35, 36),
|
|
)
|
|
uv_verts = (
|
|
(0.625, 0.0),
|
|
(0.375, 0.25),
|
|
(0.375, 0.0),
|
|
(0.625, 0.25),
|
|
(0.375, 0.5),
|
|
(0.375, 0.25),
|
|
(0.625, 0.5),
|
|
(0.375, 0.75),
|
|
(0.375, 0.5),
|
|
(0.625, 0.75),
|
|
(0.375, 1.0),
|
|
(0.375, 0.75),
|
|
(0.375, 0.5),
|
|
(0.125, 0.75),
|
|
(0.125, 0.5),
|
|
(0.875, 0.5),
|
|
(0.625, 0.75),
|
|
(0.625, 0.5),
|
|
(0.625, 0.0),
|
|
(0.625, 0.25),
|
|
(0.375, 0.25),
|
|
(0.625, 0.25),
|
|
(0.625, 0.5),
|
|
(0.375, 0.5),
|
|
(0.625, 0.5),
|
|
(0.625, 0.75),
|
|
(0.375, 0.75),
|
|
(0.625, 0.75),
|
|
(0.625, 1.0),
|
|
(0.375, 1.0),
|
|
(0.375, 0.5),
|
|
(0.375, 0.75),
|
|
(0.125, 0.75),
|
|
(0.875, 0.5),
|
|
(0.875, 0.75),
|
|
(0.625, 0.75),
|
|
)
|
|
uv_verts_list = ifc_file.createIfcTextureVertexList()
|
|
uv_verts_list.TexCoordsList = uv_verts
|
|
texture_coord = ifc_file.createIfcIndexedTriangleTextureMap()
|
|
texture_coord.MappedTo = face_set
|
|
texture_coord.TexCoordIndex = uv_indices
|
|
texture_coord.TexCoords = uv_verts_list
|
|
|
|
subject.load_indexed_texture_map(texture_coord, mesh)
|
|
|
|
uv_layer = mesh.uv_layers.active
|
|
assert uv_layer is not None
|
|
for ifc_uv, blender_uv in zip(uv_verts, uv_layer.uv, strict=True):
|
|
assert tool.Cad.are_vectors_equal(Vector(ifc_uv), blender_uv.vector)
|