def __init__(self):
app.Canvas.__init__(self, keys='interactive', size=(800, 550))
self.meshes = []
self.rotation = AffineTransform()
# Generate some data to work with
global mdata
mdata = create_sphere(20, 40, 1.0)
# Mesh with pre-indexed vertices, uniform color
self.meshes.append(visuals.MeshVisual(meshdata=mdata, color='r'))
## Mesh with pre-indexed vertices, per-face color
## Because vertices are pre-indexed, we get a different color
## every time a vertex is visited, resulting in sharp color
## differences between edges.
verts = mdata.get_vertices(indexed='faces')
nf = verts.size // 9
fcolor = np.ones((nf, 3, 4), dtype=np.float32)
fcolor[..., 0] = np.linspace(1, 0, nf)[:, np.newaxis]
fcolor[..., 1] = np.random.normal(size=nf)[:, np.newaxis]
fcolor[..., 2] = np.linspace(0, 1, nf)[:, np.newaxis]
mesh = visuals.MeshVisual(vertices=verts, face_colors=fcolor)
self.meshes.append(mesh)
## Mesh with unindexed vertices, per-vertex color
## Because vertices are unindexed, we get the same color
## every time a vertex is visited, resulting in no color differences
## between edges.
verts = mdata.get_vertices()
faces = mdata.get_faces()
nv = verts.size // 3
vcolor = np.ones((nv, 4), dtype=np.float32)
vcolor[:, 0] = np.linspace(1, 0, nv)
vcolor[:, 1] = np.random.normal(size=nv)
vcolor[:, 2] = np.linspace(0, 1, nv)
self.meshes.append(visuals.MeshVisual(verts, faces, vcolor))
self.meshes.append(
visuals.MeshVisual(verts, faces, vcolor, shading='flat'))
self.meshes.append(
visuals.MeshVisual(verts, faces, vcolor, shading='smooth'))
# Lay out meshes in a grid
grid = (3, 3)
s = 300. / max(grid)
for i, mesh in enumerate(self.meshes):
x = 800. * (i % grid[0]) / grid[0] + 400. / grid[0] - 2
y = 800. * (i // grid[1]) / grid[1] + 400. / grid[1] + 2
transform = ChainTransform([
STTransform(translate=(x, y), scale=(s, s, 1)), self.rotation
])
tr_sys = visuals.transforms.TransformSystem(self)
tr_sys.visual_to_document = transform
mesh.tr_sys = tr_sys
self.show()
self.timer = app.Timer(connect=self.rotate)
self.timer.start(0.016)
def __init__(self):
app.Canvas.__init__(self, keys='interactive', size=(800, 550))
self.meshes = []
self.rotation = MatrixTransform()
# Generate some data to work with
global mdata
mdata = create_sphere(20, 40, 1.0)
# Mesh with pre-indexed vertices, uniform color
self.meshes.append(visuals.MeshVisual(meshdata=mdata, color='b'))
# Mesh with pre-indexed vertices, per-face color
# Because vertices are pre-indexed, we get a different color
# every time a vertex is visited, resulting in sharp color
# differences between edges.
rng = np.random.RandomState(0)
verts = mdata.get_vertices(indexed='faces')
nf = verts.size // 9
fcolor = np.ones((nf, 3, 4), dtype=np.float32)
fcolor[..., 0] = np.linspace(1, 0, nf)[:, np.newaxis]
fcolor[..., 1] = rng.randn(nf, 1)
fcolor[..., 2] = np.linspace(0, 1, nf)[:, np.newaxis]
mesh = visuals.MeshVisual(vertices=verts, face_colors=fcolor)
self.meshes.append(mesh)
# Mesh with unindexed vertices, per-vertex color
# Because vertices are unindexed, we get the same color
# every time a vertex is visited, resulting in no color differences
# between edges.
verts = mdata.get_vertices()
faces = mdata.get_faces()
nv = verts.size // 3
vcolor = np.ones((nv, 4), dtype=np.float32)
vcolor[:, 0] = np.linspace(1, 0, nv)
vcolor[:, 1] = rng.randn(nv)
vcolor[:, 2] = np.linspace(0, 1, nv)
self.meshes.append(visuals.MeshVisual(verts, faces, vcolor))
self.meshes.append(
visuals.MeshVisual(verts, faces, vcolor, shading='flat'))
self.meshes.append(
visuals.MeshVisual(verts, faces, vcolor, shading='smooth'))
# Mesh with color indexed into a colormap
verts = mdata.get_vertices(None)
faces = mdata.get_faces()
values = rng.randn(len(verts))
mesh = visuals.MeshVisual(vertices=verts,
faces=faces,
vertex_values=values,
shading='smooth')
mesh.clim = [-1, 1]
mesh.cmap = 'viridis'
mesh.shininess = 0.01
self.meshes.append(mesh)
# Lay out meshes in a grid
grid = (3, 3)
s = 300. / max(grid)
for i, mesh in enumerate(self.meshes):
x = 800. * (i % grid[0]) / grid[0] + 400. / grid[0] - 2
y = 800. * (i // grid[1]) / grid[1] + 400. / grid[1] + 2
transform = ChainTransform([
STTransform(translate=(x, y), scale=(s, s, s)), self.rotation
])
mesh.transform = transform
mesh.transforms.scene_transform = STTransform(scale=(1, 1, 0.01))
self.show()
self.timer = app.Timer(connect=self.rotate)
self.timer.start(0.016)