mirror of
https://github.com/Denvi/FlatCAM.git
synced 2026-03-04 07:24:23 +01:00
268 lines
9.5 KiB
Python
268 lines
9.5 KiB
Python
from vispy.visuals import CompoundVisual, LineVisual, MeshVisual
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from vispy.scene.visuals import create_visual_node
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from vispy.gloo import set_state
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from vispy.geometry.triangulation import Triangulation
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from vispy.color import Color
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from shapely.geometry import Polygon, LineString, LinearRing
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import numpy as np
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import time
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try:
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from shapely.ops import triangulate
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import Polygon as gpc
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except:
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pass
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# Patch LineVisual
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def clear_data(self):
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self._bounds = None
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self._pos = None
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self._changed['pos'] = True
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self.update()
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LineVisual.clear_data = clear_data
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class ShapeGroup(object):
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def __init__(self, collection):
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self._collection = collection
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self._indexes = []
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self._visible = True
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def add(self, shape, color=None, face_color=None, visible=True, update=False, layer=1, order=0):
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self._indexes.append(self._collection.add(shape, color, face_color, visible, update, layer, order))
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def clear(self, update=False):
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for i in self._indexes:
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self._collection.remove(i, False)
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del self._indexes[:]
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if update:
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self._collection.redraw()
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def redraw(self):
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self._collection.redraw()
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@property
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def visible(self):
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return self._visible
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@visible.setter
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def visible(self, value):
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self._visible = value
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for i in self._indexes:
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self._collection.data[i]['visible'] = value
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self._collection.redraw()
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class ShapeCollectionVisual(CompoundVisual):
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total_segments = 0
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total_tris = 0
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def __init__(self, line_width=1, triangulation='gpc', layers=2, **kwargs):
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self.data = {}
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self.last_key = -1
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self._meshes = [MeshVisual() for _ in range(0, layers)]
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self._lines = [LineVisual(antialias=True) for _ in range(0, layers)]
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self._line_width = line_width
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self._triangulation = triangulation
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visuals = [self._lines[i / 2] if i % 2 else self._meshes[i / 2] for i in range(0, layers * 2)]
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CompoundVisual.__init__(self, visuals, **kwargs)
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for m in self._meshes:
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m.set_gl_state(polygon_offset_fill=True, polygon_offset=(1, 1), cull_face=False)
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for l in self._lines:
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l.set_gl_state(blend=True)
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self.freeze()
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def add(self, shape, color=None, face_color=None, visible=True, update=False, layer=1, order=0):
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self.last_key += 1
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self.data[self.last_key] = {'geometry': shape, 'color': color, 'face_color': face_color,
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'visible': visible, 'layer': layer, 'order': order}
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self.update_shape_buffers(self.last_key)
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if update:
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self._update()
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return self.last_key
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def update_shape_buffers(self, key):
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mesh_vertices = [] # Vertices for mesh
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mesh_tris = [] # Faces for mesh
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mesh_colors = [] # Face colors
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line_pts = [] # Vertices for line
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line_colors = [] # Line color
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geo, color, face_color = self.data[key]['geometry'], self.data[key]['color'], self.data[key]['face_color']
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if geo is not None and not geo.is_empty:
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simple = geo.simplify(0.01) # Simplified shape
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pts = [] # Shape line points
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tri_pts = [] # Mesh vertices
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tri_tris = [] # Mesh faces
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if type(geo) == LineString:
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# Prepare lines
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pts = self._linestring_to_segments(np.asarray(simple)).tolist()
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elif type(geo) == LinearRing:
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# Prepare lines
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pts = self._linearring_to_segments(np.asarray(simple)).tolist()
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elif type(geo) == Polygon:
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# Prepare polygon faces
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if face_color is not None:
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if self._triangulation == 'vispy':
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# VisPy triangulation
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# Concatenated arrays of external & internal line rings
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vertices = self._open_ring(np.asarray(simple.exterior))
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edges = self._generate_edges(len(vertices))
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for ints in simple.interiors:
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v = self._open_ring(np.asarray(ints))
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edges = np.append(edges, self._generate_edges(len(v)) + len(vertices), 0)
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vertices = np.append(vertices, v, 0)
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tri = Triangulation(vertices, edges)
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tri.triangulate()
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tri_pts, tri_tris = tri.pts.tolist(), tri.tris.tolist()
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elif self._triangulation == 'gpc':
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# GPC triangulation
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p = gpc.Polygon(np.asarray(simple.exterior))
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for ints in simple.interiors:
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q = gpc.Polygon(np.asarray(ints))
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p -= q
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for strip in p.triStrip():
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# Generate tris indexes for triangle strips
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a = [[x + y for x in range(0, 3)] for y in range(0, len(strip) - 2)]
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# Append vertices & tris
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tri_tris += [[x + len(tri_pts) for x in y] for y in a]
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tri_pts += strip
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# Prepare polygon edges
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if color is not None:
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pts = self._linearring_to_segments(np.asarray(simple.exterior)).tolist()
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for ints in simple.interiors:
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pts += self._linearring_to_segments(np.asarray(ints)).tolist()
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# Appending data for mesh
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if len(tri_pts) > 0 and len(tri_tris) > 0:
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mesh_tris += tri_tris
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mesh_vertices += tri_pts
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mesh_colors += [Color(face_color).rgba] * len(tri_tris)
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# Appending data for line
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if len(pts) > 0:
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line_pts += pts
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line_colors += [Color(color).rgba] * len(pts)
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# Store buffers
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self.data[key]['line_pts'] = line_pts
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self.data[key]['line_colors'] = line_colors
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self.data[key]['mesh_vertices'] = mesh_vertices
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self.data[key]['mesh_tris'] = mesh_tris
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self.data[key]['mesh_colors'] = mesh_colors
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def remove(self, key, update=False):
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self.data.pop(key)
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if update:
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self._update()
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def clear(self, update=False):
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self.data.clear()
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if update:
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self._update()
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def _update(self):
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mesh_vertices = [[] for _ in range(0, len(self._meshes))] # Vertices for mesh
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mesh_tris = [[] for _ in range(0, len(self._meshes))] # Faces for mesh
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mesh_colors = [[] for _ in range(0, len(self._meshes))] # Face colors
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line_pts = [[] for _ in range(0, len(self._lines))] # Vertices for line
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line_colors = [[] for _ in range(0, len(self._lines))] # Line color
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# Merge shapes buffers
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for data in self.data.values():
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if data['visible']:
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try:
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line_pts[data['layer']] += data['line_pts']
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line_colors[data['layer']] += data['line_colors']
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mesh_tris[data['layer']] += [[x + len(mesh_vertices[data['layer']])
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for x in y] for y in data['mesh_tris']]
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mesh_vertices[data['layer']] += data['mesh_vertices']
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mesh_colors[data['layer']] += data['mesh_colors']
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except Exception as e:
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print "Data error", e
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# Updating meshes
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for i, mesh in enumerate(self._meshes):
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if len(mesh_vertices[i]) > 0:
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set_state(polygon_offset_fill=False)
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mesh.set_data(np.asarray(mesh_vertices[i]), np.asarray(mesh_tris[i], dtype=np.uint32),
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face_colors=np.asarray(mesh_colors[i]))
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else:
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mesh.set_data()
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mesh._bounds_changed()
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# Updating lines
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for i, line in enumerate(self._lines):
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if len(line_pts[i]) > 0:
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line.set_data(np.asarray(line_pts[i]), np.asarray(line_colors[i]), self._line_width, 'segments')
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else:
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line.clear_data()
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line._bounds_changed()
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# if len(line_pts) > 0:
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# self._line.set_data(np.asarray(line_pts), np.asarray(line_colors), self._line_width, 'segments')
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# else:
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# self._line._bounds = None
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# self._line._pos = None
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# self._line._changed['pos'] = True
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# self._line.update()
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# self._line._bounds_changed()
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self._bounds_changed()
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def _open_ring(self, vertices):
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return vertices[:-1] if not np.any(vertices[0] != vertices[-1]) else vertices
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def _generate_edges(self, count):
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edges = np.empty((count, 2), dtype=np.uint32)
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edges[:, 0] = np.arange(count)
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edges[:, 1] = edges[:, 0] + 1
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edges[-1, 1] = 0
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return edges
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def _linearring_to_segments(self, arr):
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# Close linear ring
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if np.any(arr[0] != arr[-1]):
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arr = np.concatenate([arr, arr[:1]], axis=0)
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return self._linestring_to_segments(arr)
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def _linestring_to_segments(self, arr):
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return np.asarray(np.repeat(arr, 2, axis=0)[1:-1])
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def redraw(self):
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self._update()
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ShapeCollection = create_visual_node(ShapeCollectionVisual)
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