3D-printing/Cura
1
0
Fork 0
mirror of https://github.com/Ultimaker/Cura.git synced 2025-07-06 14:37:29 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

feat: use logarithmic conversion for lithophanes

Browse source
This commit is contained in:
Tim Kuipers 2019-05-20 12:10:18 +02:00
parent b3d7887d4d
commit 88b424d36a
3 changed files with 40 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

16
plugins/ImageReader/ImageReader.py
View file

@ -3,6 +3,8 @@
import numpy
import math
from PyQt5.QtGui import QImage, qRed, qGreen, qBlue
from PyQt5.QtCore import Qt
@ -46,9 +48,9 @@ class ImageReader(MeshReader):
def _read(self, file_name):
size = max(self._ui.getWidth(), self._ui.getDepth())
return self._generateSceneNode(file_name, size, self._ui.peak_height, self._ui.base_height, self._ui.smoothing, 512, self._ui.lighter_is_higher)
return self._generateSceneNode(file_name, size, self._ui.peak_height, self._ui.base_height, self._ui.smoothing, 512, self._ui.lighter_is_higher, self._ui.use_logarithmic_function)
def _generateSceneNode(self, file_name, xz_size, peak_height, base_height, blur_iterations, max_size, lighter_is_higher):
def _generateSceneNode(self, file_name, xz_size, peak_height, base_height, blur_iterations, max_size, lighter_is_higher, use_logarithmic_function):
scene_node = SceneNode()
mesh = MeshBuilder()
@ -124,8 +126,14 @@ class ImageReader(MeshReader):
Job.yieldThread()
height_data *= scale_vector.y
height_data += base_height
if use_logarithmic_function:
min_luminance = 2.0 ** (peak_height - base_height)
for (y, x) in numpy.ndindex(height_data.shape):
mapped_luminance = min_luminance + (1.0 - min_luminance) * height_data[y, x]
height_data[y, x] = peak_height - math.log(mapped_luminance, 2)
else:
height_data *= scale_vector.y
height_data += base_height
heightmap_face_count = 2 * height_minus_one * width_minus_one
total_face_count = heightmap_face_count + (width_minus_one * 2) * (height_minus_one * 2) + 2