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# Happy CADing with ZW3D: Design a Football to Celebrate World Cup

June 12, 2018

The World Cup 2018 is coming! This summer, football superstars all over the world will gather in Russia to compete for the glistening golden trophy. As a football fan and designer, why not design your own football to celebrate it?

Figure 1   Football

Step1: Create a pentagon on XY plane whose excircle has a radius of 80mm.

Figure 2   Pentagon on XY plane

Step2: Create a hexagon.

Draw a line from any corner of the pentagon in 3D Sketch, the angle between the line and the pentagon edge is 120 degrees. Then create a plane (Plane 1) based on this line and one edge of the pentagon. On Plane 1, create a hexagon which shares an edge with the pentagon.

Figure3   Hexagon on Plane 1

Step3: Find the football center.

Draw a line (shown as Axis 1 in Figure 4) along the Z axis. It is vertical to the pentagon naturally. And then draw another line (Axis 2 in Figure 4) from the hexagon center and make it vertical to the hexagon. Their intersection point is the football center.

Figure4   Find Football Center

Step4: With football center as a vertex, create pyramids based on the hexagon and the pentagon respectively.

Figure5   Create pyramids

Step5: Create a sphere shape centered at football center, set the diameter to 220mm. Then make a 2mm thick shell based on the sphere.

Figure6   Combine(Intersect) between the pyramids and shell sphere

Step6: Pattern the yellow hexagonpiece along the Z axis.

Figure 7   Pattern hexagon piece

Step7: Copy the red pentagon piece together with a yellow hexagon piece along Axis 2.

Figure 8   Copy one pentagon and one hexagon

Step8: Pattern the result derived from Step7 along the Z axis.

Figure 9   Pattern the result of Step7

Step9: Taking Plane 2 as a reference plane, mirror all shapes.

Figure 10   Mirror all shapes

Step10: Move the mirrored half of the shapes 36 degrees along the Z axis.

Figure 11   Move the mirrored half