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| author | Lex Neva <github.com@lexneva.name> | 2019-02-22 22:07:15 -0500 |
|---|---|---|
| committer | Lex Neva <github.com@lexneva.name> | 2019-03-08 19:57:11 -0500 |
| commit | 4ba3cd708561870a731d9634d9cdd5c18579cac7 (patch) | |
| tree | cd901daa9bd9f1901f3dbbca57940a981215267d /lib/svg/realistic_rendering.py | |
| parent | 3611e2340997b917cc89e7d405b3c7d9bc86aab5 (diff) | |
refactor add_commands() out into commands module
Diffstat (limited to 'lib/svg/realistic_rendering.py')
| -rw-r--r-- | lib/svg/realistic_rendering.py | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/lib/svg/realistic_rendering.py b/lib/svg/realistic_rendering.py deleted file mode 100644 index 73da3a09..00000000 --- a/lib/svg/realistic_rendering.py +++ /dev/null @@ -1,130 +0,0 @@ -import simplepath -import math - -from .units import PIXELS_PER_MM -from ..utils import Point - -# The stitch vector path looks like this: -# _______ -# (_______) -# -# It's 0.32mm high, which is the approximate thickness of common machine -# embroidery threads. - -# 1.216 pixels = 0.32mm -stitch_height = 1.216 - -# This vector path starts at the upper right corner of the stitch shape and -# proceeds counter-clockwise.and contains a placeholder (%s) for the stitch -# length. -# -# It contains two invisible "whiskers" of zero width that go above and below -# to ensure that the SVG renderer allocates a large enough canvas area when -# computing the gaussian blur steps. Otherwise, we'd have to expand the -# width and height attributes of the <filter> tag to add more buffer space. -# The width and height are specified in multiples of the bounding box -# size, It's the bounding box aligned with the global SVG canvas's axes, not -# the axes of the stitch itself. That means that having a big enough value -# to add enough padding on the long sides of the stitch would waste a ton -# of space on the short sides and significantly slow down rendering. -stitch_path = "M0,0c0.4,0,0.4,0.3,0.4,0.6c0,0.3,-0.1,0.6,-0.4,0.6v0.2,-0.2h-%sc-0.4,0,-0.4,-0.3,-0.4,-0.6c0,-0.3,0.1,-0.6,0.4,-0.6v-0.2,0.2z" - -# This filter makes the above stitch path look like a real stitch with lighting. -realistic_filter = """ - <filter - style="color-interpolation-filters:sRGB" - id="realistic-stitch-filter" - x="-0.1" - width="1.2" - y="-0.1" - height="1.2"> - <feGaussianBlur - stdDeviation="1.5" - id="feGaussianBlur1542-6" - in="SourceAlpha" /> - <feComponentTransfer - id="feComponentTransfer1544-7" - result="result1"> - <feFuncR - id="feFuncR1546-5" - type="identity" /> - <feFuncG - id="feFuncG1548-3" - type="identity" /> - <feFuncB - id="feFuncB1550-5" - type="identity" - slope="4.5300000000000002" /> - <feFuncA - id="feFuncA1552-6" - type="gamma" - slope="0.14999999999999999" - intercept="0" - amplitude="3.1299999999999999" - offset="-0.33000000000000002" /> - </feComponentTransfer> - <feComposite - in2="SourceAlpha" - id="feComposite1558-2" - operator="in" /> - <feGaussianBlur - stdDeviation="0.089999999999999997" - id="feGaussianBlur1969" /> - <feMorphology - id="feMorphology1971" - operator="dilate" - radius="0.10000000000000001" /> - <feSpecularLighting - id="feSpecularLighting1973" - result="result2" - specularConstant="0.70899999" - surfaceScale="30"> - <fePointLight - id="fePointLight1975" - z="10" /> - </feSpecularLighting> - <feGaussianBlur - stdDeviation="0.040000000000000001" - id="feGaussianBlur1979" /> - <feComposite - in2="SourceGraphic" - id="feComposite1977" - operator="arithmetic" - k2="1" - k3="1" - result="result3" - k1="0" - k4="0" /> - <feComposite - in2="SourceAlpha" - id="feComposite1981" - operator="in" /> - </filter> -""" - - -def realistic_stitch(start, end): - """Generate a stitch vector path given a start and end point.""" - - end = Point(*end) - start = Point(*start) - - stitch_length = (end - start).length() - stitch_center = (end + start) / 2.0 - stitch_direction = (end - start) - stitch_angle = math.atan2(stitch_direction.y, stitch_direction.x) - - stitch_length = max(0, stitch_length - 0.2 * PIXELS_PER_MM) - - # create the path by filling in the length in the template - path = simplepath.parsePath(stitch_path % stitch_length) - - # rotate the path to match the stitch - rotation_center_x = -stitch_length / 2.0 - rotation_center_y = stitch_height / 2.0 - simplepath.rotatePath(path, stitch_angle, cx=rotation_center_x, cy=rotation_center_y) - - # move the path to the location of the stitch - simplepath.translatePath(path, stitch_center.x - rotation_center_x, stitch_center.y - rotation_center_y) - - return simplepath.formatPath(path) |
