Google ClassroomGoogle Classroom
GeoGebraClasse GeoGebra

Bezier-Spline Schachfigur Dame

short protocol to process the shape points

Quick adaption Select all points together A2...A20+B1..B18+C1..C18 [AlgebraView] and move away from the figure Select a curve point Ann add control points Bnn + Cnn [hold Ctrl + Click] move to the edge of the figure and adjust incoming (green) and outgoing (red) part of curve... Make a new Spline Copy the points of figure shape to list of points Fig. Execute(MKXY) → transfer points to spreadsheet variables A1...An Execute(MKCA)→ generate control points and copy to spreadsheet variables B1...Bn Execute(MKCB) → generate control points and copy to spreadsheet variables C1...Cn Execute(MKBCurve) → generate Cubic Bezier-Parameter-Splines c2....cn-1 Adjust Bezier-Curves to Fig shape by control points it may take some work to find the appropriate control point settings to map the figure Execute(MKSurface) → MKFig script to make surface shape (rotate 2pi by yAxis adjust 4 other axis) Execute(MKFig) → generate surface mapping figur b,c,d,... (adjust colors, grid lines, labes, show objects eg.) Mulltiple selection of AlgebraView objects [hold Shift klick first-klick last]. Click a Fig point to show handles of control points. Zoom In/Out (scroll mouse wheel) to handle details.

working example

working example
zoom in (scroll mouse wheel) multiselect ctrl+click Fig point and control points move selection adjust control handles

Adjust shape to a new figure

Adjust shape to a new figure

STL Export (Classic 6.x) and prettified in 3D Builder - ready for 3D-Print

STL Export (Classic 6.x) and prettified in 3D Builder - ready for 3D-Print