Himanshu

a.html

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+<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <!-- arrowhead marker definition -->
+    <marker id="arrow" viewBox="0 0 60 60" refX="30" refY="30"
+        markerWidth="20" markerHeight="20"
+        orient="auto-start-reverse">
+      <path d="M 0 0 L 10 5 L 0 10 z" />
+    </marker>
+  </defs>
+
+  <!-- Coordinate axes with a arrowhead in both direction -->
+  <polyline points="10,10 10,90 90,90" fill="none" stroke="black"
+   marker-start="url(#arrow)" marker-end="url(#arrow)"  />
+</svg>

documents/input specs/Discussion.txt

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+NCERT Class 10th Chapter 6 Triangles 
+
+Note:I think we should have an extend() function so that the user can extend a line without having to deal with the angle and making it look like a real extension
+Note: We should not rotate the 'measurement' with the line, like they've write it straight (0°) in the math book even for bent lines
+
+Fig6.1 (ii) :
+s1=square(side=100)
+s2=square(side=60,center=s1.center)
+
+Fig 6.1 (iii):
+t1=triangle(side=70)
+Note: I think it would be quite efficient if the user writes just one side, we make an equilateral triangle, if two-isosceles and if all 3 we make skelene triangle
+t2=triangle(side=50,center=t1.center)
+
+Fig 6.2:
+l1=line(length=50,label="AD")
+l2=line(angle=-90,length=50)
+l3=line(angle=-10,y1=l2.y1,length=70,label="BC")
+l4=line(x1=l3.x1,y1=l3.y1,x2=l1.x2,y2=l1.y2)
+
+Fig 6.5:
+t=trapezium(side1=30,side2=40,distance=50,markAngles="all",label="ABCD")
+Note: We can have specific parameters if we want only one angle to be marked
+
+Fig 6.6:
+s=square(side=50,label="ABCD",shadeCorners="all")
+Note: Similar to how we mark angles
+
+Fig 6.7:
+s=square(side=50,label="ABCD")
+
+Fig 6.7 2nd part:
+p=parallelogram(side1=40,side2=50,angle=50,label="PQRS)
+
+Fig 6.8:
+p=parallelogram(side=40,side=40,angle=60,label="PQRS")
+
+Fig 6.9:
+t=triangle(side=50,label="ABC")
+e=extend(direction="forward",type="solid",t.side1,20)
+e2=extend(direction="forward",type="solid",t.side3,20)
+l=line(startpoint=midpoint(t.side1),endpoint=midpoint(t.side3))
+
+Fig 6.11:
+t=triangle(side=50,angle=-10,markAngles=t.v1,label="BCA")
+e1=extend(direction="forward",t.side1,type="solid",cap="arrow",length=20)
+e2=extend(direction="forward",t.side3,type="solid",cap="arrow",length=20,direction="forward")
+
+Fig 6.12:
+t=triangle(type="right",side1=60,side2=80,angle=-30,label="BCA")
+l1=line(startpoint=midpoint(t.side1),endpoint=midpoint(t.side2))
+e1=extend(l1,direction="both",cap="arrow",type="solid")
+l2=line(startpoint=midpoint(t.side1),endpoint=midpoint(t.side2,ratio="1:3"))
+e2=extend(l2,direction="both",cap="arrow")
+Note: default for 'type' with extend is "dotted"
+
+Fig 6.13:
+t=triangle(side=50,label="BCA")
+l=line(startpoint=midpoint(t.side1),endpoint=midpoint(t.side3),type="dotted")
+e=extend(l,cap="arrow",direction="both")
+
+Fig 6.14:
+l1=line(length=50,label="AB")
+l2=line(angle=-90,length=50)
+l3=line(angle=-10,y1=l2.y1,length=70,label="DC")
+l4=line(x1=l3.x1,y1=l3.y1,x2=l1.x2,y2=l1.y2)
+l5=line(startpoint=midpoint(l2,ratio="2:5"),endpoint=midpoint(l4,ratio="2:5"),label="EF")
+
+Fig 6.14:
+t=triangle(side=60,label="QRP",markAngles=t.v2)
+l=line(startpoint=midpoint(t.side1),endpoint=midpoint(t.side3),label="ST")
+a=angle(l,t.side1)
+Note: by default the angle() function will mark the smaller angle
+
+Fig 6.15:
+t=trapezium(side1=30,side2=50,distance=40,labels="DCBA",diagonal{v2,v4,"d1",dotted})
+l=line(startpoint=midpoint({v1,v4}),endpoint=midpoint({v2,v3}))
+Note: Having diagonal inside the brackets will make it difficult to access each of its properties such as dotted line or solid line, cap style, labels, naming etc
+
+Fig 6.17:
+t=triangle(side1=30,side2=40,label="BCA",markAngles=v2)
+l=line(startpoint=midpoint(t.side2),label="DE",parallelTo=t.side1)
+e=extend(l,direction="both",cap="arrow",length=30,type="solid")
+a=angle(l,t.side3)
+
+Fig 6.17 (ii):
+t=triangle(side=50,label="BCA")
+l=line(startpoint=midpoint(t.side3),endpoint=midpoint(t.side2),label="DE")
+e=extend(l,direction="both",type="solid",length=20)
+
+Fig 6.18:
+k=kite(side1=30,side2=50,label="DCBA")
+l1=line(startpoint=k.v2,endpoint=k.v4)
+l2=line(startpoint=midpoint({k.v3,k.v4}),endpoint=midpoint({k.v2,k.v4}),label="ML")
+l3=line(startpoint=midpoint({k.v2,k.v4}),endpoint=midpoint({k.v1,k.v4}),label=" N")
+Note: I gave a space in label so that space is written instead of a label, or simply so that 'L' doesn't appear twice at the same point. We can also assign a special character that denotes "null"
+
+Fig 6.19:
+t=triangle(side=60,label="BCA")
+l1=line(startpoint=t.v3,endpoint=midpoint(t.side1),label=" E")
+l2=line(startpoint=l1.endpoint,endpoint=midpoint(t.side3))
+l3=line(startpoint=l2.endpoint,endpoint=midpoint({t.v1,l1.endpoint}),label="DF")
+
+Note: I think we should have a "copy()" or "similar()" function to copy similar shapes which are slightly different. Eg. Two congruent triangles that have a common point, we can just do copy() like:
+t2=copy(t1,v1=t1.v1)
+
+Trying to integrate medians/diagonals etc within the main functions:
+
+Fig 6.20:
+t1=triangle(side=50,label="QRP",midpointLine(side2,side3,name="m",label="EF"))
+t2=triangle(base=t1.side1,side2=20,label="  O")
+t3=triangle(base=t1.m,side2=10,label="  D")
+l=line(startpoint=t2.v3,endpoint=t1.v3)
+Note: we'll have to use dynamic variable naming with this
+
+Fig 6.21:
+t1=triangle(side=50,label="QRP")
+t=trapezium(side1=t1.side1,side2=40,distance=10,label="  CB")
+t2=triangle(base=t.base2,side=30,label="  O")
+t3=triangle(base=t.side2,side=40,label="  A")
+l=line(startpoint=t2.v3,endpoint=t1.t3)
+
+Fig 6.22:
+t=triangle(side=50,label="BCA",markAngle=v1,markAngle=v2,markAngle=v3)
+Note: opposed to angle() function, we can have this property that would allow the user to mark and differentiate between three angles by default
+
+Fig 6.23:
+t=triangle(side=50,label="BCA",markAngle={v1,v2})
+e1=extend(t.side2,direction="forward",length=20,type="solid",cap="arrow")
+e2=extend(t.side3,direction="backward",type="solid",cap="arrow",length=20)
+Note: Using {} and writing two values separated by ',' will mark two or more angles as equal angles
+
+Fig 6.24
+t=triangle(side=40,label="BCA")
+
+Another alternate way for midpointLine():
+
+Fig 6.24 (under the first one, not marked):
+t=triangle(side=50,label="EFD",midpointLine=line(startpoint=midpoint(side2),endpoint=midpoint(side3),type="dotted",label="QP")
+
+Fig 6.25:
+t=triangle(side1=30,side2=50,side3=20,label="BCA")
+
+Fig 6.26:
+t1=triangle(side=30,label="BCA")
+t2=triangle(v1=t1.x1+100,side=50,label="EFD",midpointline(side2,side3,type="dotted",label="PQ")
+Note: I feel the idea you gave about having nested functions like above is easier to understand
+
+Fig 6.27 (lower one):
+t=triangle(side1=40,side2=60,side3=30,label="EFD",markAngles=v3,side2.measurement="6cm",side3.measurement="3cm")
+
+Fig 6.28 (right one):
+t=triangle(side=50,label="EFD",midpointLine(side2,side3,ratio="4:1",label="PQ",type="dotted"))
+
+Fig 6.29:
+t1=triangle(side=30,label="PQO",angle=-90)
+t2=copy(t1,v3=t1.v3,label="SR ")
+Note: The labelling will happen before the figure is rotated by the given angle
+
+Fig 6.30:
+t=triangle(side=50,label='BCA',markAngle={v1,v3})
+
+=================================================================================================================t = triangle(length=('6','3\sqrt{3}','3.8'),angle=('60',-,'80'),label='BCA',baseAngle=0)
+OR
+l1 = line(label="AB",length='3.8',angle='0')
+l2 = line(label="BC",length='6',svg={stroke-width=2})
+l3 = line(label="CA",length='3\sqrt{3}')
+t = triangle(l1,l2,l3,angles=((l1,l3,60),(l2,l3,80)))
+
+---------------------------------------------------------------------------------------
+Manjot --
+1. lengthy code in second case
+2. finding hard to associate
+------------------------------------------------------------------------------------------------------
+
+label = ' l' or (,'l') ' l'
+label = 'BCA' or ('B','C','A') or 'B C A'
+
+style = dotted, dotted-aarowed, dotted-right-arrowed, dotted-left-arrowed
+OR
+style = dotted
+arrow = forward, backward, both, none
+
+---------------------------------------------------------------------------------------------
+Manjot - Prefer second one -- seems simple
+---------------------------------------------------------------------------------------------
+
+Visual parameters
+l2 = line(label="BC",length='6',svg={stroke-width=4,stroke=red})
+OR
+thickness vs stroke-width
+color vs stroke
+as parameters of our object itself
+
+-------------------------------------------------------------------------------------
+1. We didn't need to parse, as they have no semantic
+2. learning curve, he/she needs to remember that which is core tool command and which is svg
+3. misuse of svg functionality
+4. We can focus more on semantic, whereas tool will also support visual effects from the first day
+
+Manjot -- preferred second one. Still we can implement svg
+-----------------------------------------------------------------------------------------------------
+
+Point on Circle Periphery
+point(location=perimeter, angle=-60, label='P')
+OR
+point(location=perimeter, ratio='5:7', label='P')
+
+
+
+triangle{
+label
+length
+angle
+baseAngle
+Style
+showLengths = None (default), 'all', 'AB,BC', (l1,l2)
+showAngles = None (default), 'all', 'all_', (v1_,v3_), 'A_,C_' -- _ is for values, all and all_ can be variables
+}
+
+line(
+label = 'A,B', 'l', ',l', 'l,'
+length = 20 (default: cm), 20in, 20px, 20m, 20cm, 20km, 20mi, 20mm, 
+angle - 60 (default: degree), 60r, 60d
+style = solid, dashed
+arrows = None (default), (ratio='5:7',direction='forward', 'backward', v1, v2, 'A', 'B') -- for both sides ((direction='forward'),(direction='backward'))
+showLength = False (default), True
+points = (ratio = '5:7', label = 'P') -- for more multiple points, we can use list of arrays
+extension = (direction = 'forward', 'backward', v1, v2, 'A', 'B',
+line = {length = 4cm, style = dashed}
+)
+)
+
+Cicle{
+point = (ratio, label, location, angle)
+}
+
+object property checks - angles doesn't follow line lengths