Figure Asymptote geometry -- 071
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Show geometry/fig0710.asy on Github.
Generated with Asymptote 3.00-0.
Categories : Examples 2D | Geometry.asy
Tags : #Geometry | #Abscissa | #Parabola | #Point
import geometry; size(12cm); // currentcoordsys=cartesiansystem((0,0),i=(1,0.5),j=(-0.5,.75)); show(currentcoordsys, xpen=invisible); point F=(2,-1.5); dot("$F$",F,N,red); // Enlarge the bounding box of the current picture. draw(box((-0.5,-0.4),(4,1.5)),invisible); parabola p=parabola(F,0.2,90); draw(p,bp+dashed); /* Defered drawing to adjust the path to the final bounding box.*/ // Define the bounding box to draw the parabola. // Try finalbounds(); to determine the final bounding box. p.bmin=(-0.5,-0.4); p.bmax=(3.7,0.75); draw((path)p, linewidth(bp)); /* The path of 'p' is restricted to the box whose the corners are p.bmin, p.bmax.*/ /*<asyxml><view file="modules/geometry.asy" type="point" signature="point(explicit parabola,explicit real)"/></asyxml>*/ dot("point(p, 0)", point(p,0),2E,3mm+blue); dot("point(p, 15)", point(p,15),2W,3mm+blue); /*<asyxml><view file="modules/geometry.asy" type="abscissa" signature="nodabscissa(real)"/></asyxml>*/ dot("point(p, 40)", point(p,nodabscissa(40)), 2W,3mm+blue); // point(p,nodabscissa(40)) can be replaced by point(p,40) /*<asyxml><view file="modules/geometry.asy" type="real[]" signature="bangles(picture,parabola)"/></asyxml>*/ real[] bg=bangles(p); /*<asyxml><view file="modules/geometry.asy" type="int" signature="parabolanodesnumber(parabola,real,real)"/></asyxml>*/ dot("point(p, parabolanodesnumber(p,bg[0],bg[1])/2)", point(p, parabolanodesnumber(p,bg[0],bg[1])/2), S, 3mm+blue); dot((path)p, yellow);