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Added working arcs to 2D svg

master
Daid 2012-06-22 05:08:08 +02:00
parent ef0d96a041
commit 34bc89e66f
1 changed files with 56 additions and 3 deletions
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59
Cura/util/svg.py
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@ -95,7 +95,7 @@ def processPath(e):
print param
while i < len(param):
endPoint = p + complex(param[i+5], -param[i+6])
addArc(curPath, p, endPoint, param[i], param[i+1], param[i+2], param[i+3], param[i+4])
addArc(curPath, p, endPoint, complex(param[i], param[i+1]), param[i+2], param[i+3], param[i+4])
p = endPoint
curPath.append(p)
i += 7
@ -124,8 +124,61 @@ def addCurve(path, p0, q0, q1, p1):
path.append(s)
oldPoint = s
def addArc(path, end, rx, ry, rot, largeArc, sweep):
pass
def addArc(path, begin, end, radius, xAxisRotation, largeArcFlag, sweepFlag):
xAxisRotationComplex = complex(math.cos(math.radians(xAxisRotation)), math.sin(math.radians(xAxisRotation)))
reverseXAxisRotationComplex = complex(xAxisRotationComplex.real, -xAxisRotationComplex.imag)
beginRotated = begin * reverseXAxisRotationComplex
endRotated = end * reverseXAxisRotationComplex
beginTransformed = complex(beginRotated.real / radius.real, beginRotated.imag / radius.imag)
endTransformed = complex(endRotated.real / radius.real, endRotated.imag / radius.imag)
midpointTransformed = 0.5 * (beginTransformed + endTransformed)
midMinusBeginTransformed = midpointTransformed - beginTransformed
midMinusBeginTransformedLength = abs(midMinusBeginTransformed)
if midMinusBeginTransformedLength > 1.0:
radius *= midMinusBeginTransformedLength
beginTransformed /= midMinusBeginTransformedLength
endTransformed /= midMinusBeginTransformedLength
midpointTransformed /= midMinusBeginTransformedLength
midMinusBeginTransformed /= midMinusBeginTransformedLength
midMinusBeginTransformedLength = 1.0
midWiddershinsTransformed = complex(-midMinusBeginTransformed.imag, midMinusBeginTransformed.real)
midWiddershinsLengthSquared = 1.0 - midMinusBeginTransformedLength * midMinusBeginTransformedLength
if midWiddershinsLengthSquared < 0.0:
midWiddershinsLengthSquared = 0.0
midWiddershinsLength = math.sqrt(midWiddershinsLengthSquared)
midWiddershinsTransformed *= midWiddershinsLength / abs(midWiddershinsTransformed)
centerTransformed = midpointTransformed
if largeArcFlag == sweepFlag:
centerTransformed -= midWiddershinsTransformed
else:
centerTransformed += midWiddershinsTransformed
beginMinusCenterTransformed = beginTransformed - centerTransformed
beginMinusCenterTransformedLength = abs(beginMinusCenterTransformed)
if beginMinusCenterTransformedLength <= 0.0:
return end
beginAngle = math.atan2(beginMinusCenterTransformed.imag, beginMinusCenterTransformed.real)
endMinusCenterTransformed = endTransformed - centerTransformed
angleDifference = getAngleDifferenceByComplex(endMinusCenterTransformed, beginMinusCenterTransformed)
if sweepFlag:
if angleDifference < 0.0:
angleDifference += 2.0 * math.pi
else:
if angleDifference > 0.0:
angleDifference -= 2.0 * math.pi
center = complex(centerTransformed.real * radius.real, centerTransformed.imag * radius.imag) * xAxisRotationComplex
for side in xrange(1, 32):
a = beginAngle + float(side) * math.pi * 2 / 32
circumferential = complex(math.cos(a) * radius.real, math.sin(a) * radius.imag) * beginMinusCenterTransformedLength
point = center + circumferential * xAxisRotationComplex
path.append(point)
def getAngleDifferenceByComplex( subtractFromComplex, subtractComplex ):
subtractComplexMirror = complex( subtractComplex.real , - subtractComplex.imag )
differenceComplex = subtractComplexMirror * subtractFromComplex
return math.atan2( differenceComplex.imag, differenceComplex.real )
def movePath(p, offset):
return map(lambda _p: _p - offset, p)