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Implemented pointwise_become_partial for parametric surfaces

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This commit is contained in:
Grant Sanderson 2020-06-29 22:52:27 -07:00
parent 61424dbfec
commit 5e7913fdd4
1 changed files with 39 additions and 1 deletions
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40
manimlib/mobject/types/surface.py
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@ -3,6 +3,7 @@ import moderngl
from manimlib.constants import *
from manimlib.mobject.mobject import Mobject
from manimlib.utils.bezier import integer_interpolate
from manimlib.utils.bezier import interpolate
from manimlib.utils.color import color_to_rgba
from manimlib.utils.color import rgb_to_color
@ -123,6 +124,34 @@ class ParametricSurface(Mobject):
self.rgbas = interpolate(mobject1.rgbas, mobject2.rgbas, alpha)
return self
def pointwise_become_partial(self, smobject, a, b):
assert(isinstance(smobject, ParametricSurface))
self.points[:] = smobject.points[:]
if a <= 0 and b >= 1:
return self
nu, nv = smobject.resolution
self.points[:] = np.vstack([
self.get_partial_points_array(arr, a, b, (nu, nv, 3))
for arr in self.get_surface_points_and_nudged_points()
])
return self
def get_partial_points_array(self, points, a, b, resolution):
nu, nv = resolution[:2]
points = points.reshape(resolution)
lower_index, lower_residue = integer_interpolate(0, nv - 1, a)
upper_index, upper_residue = integer_interpolate(0, nv - 1, b)
tuples = [
(points[:, :lower_index], lower_index, lower_residue),
(points[:, upper_index:], upper_index, upper_residue),
]
for to_change, index, residue in tuples:
col = interpolate(points[:, index], points[:, index + 1], residue)
to_change[:] = np.tile(col, to_change.shape[1]).reshape(to_change.shape)
return points.reshape((nu * nv, *resolution[2:]))
# For shaders
def get_shader_data(self):
s_points, du_points, dv_points = self.get_surface_points_and_nudged_points()
data = self.get_blank_shader_data_array(len(s_points))
@ -212,12 +241,21 @@ class TexturedSurface(ParametricSurface):
sm.set_opacity(opacity, family)
return self
def pointwise_become_partial(self, tsmobject, a, b):
super().pointwise_become_partial(tsmobject, a, b)
self.im_coords[:] = tsmobject.im_coords
if a <= 0 and b >= 1:
return self
nu, nv = tsmobject.resolution
self.im_coords[:] = self.get_partial_points_array(self.im_coords, a, b, (nu, nv, 2))
return self
def get_shader_uniforms(self):
result = super().get_shader_uniforms()
result["num_textures"] = self.num_textures
return result
def fill_in_shader_color_info(self, data):
data["im_coords"] = self.im_coords[self.get_triangle_indices()]
data["im_coords"] = self.im_coords
data["opacity"] = self.opacity
return data