Cylinder

Cylinder



Start 3D Model Builder (Geometry Pack)

Click on and Project OpenDrawing CurvesCylinder

Draw points for base

Draw points around the base starting at 20

Copy (hold CONTROL key) and turn / rotate the first point around to (20)

Repeat to create all the points around the base as illustrated...

Draw the line for the base

Press Draw as the action

Press Lines to draw a line

Draw a single line, all the way around the base of the cylinder

Select the line

Press View Rotate as the action

Rotate the view as illustrated

Press Move as the action

Click on the line to select it

Copy the line

Copy (hold CONTROL key) and move the line up to 20

Draw triangles on the side

Press Triangles to draw triangles

Draw triangles on the side of the cylinder

Draw triangles on the side

Press View Rotate as the action

Rotate the view to turn the cylinder around

Press Draw as the action

Draw more triangles as illustrated

Draw triangles on the side

Draw more triangles as illustrated

Finish the side of the cylinder

Press View Rotate as the action

Rotate the view to turn the cone around

Press Draw as the action

Draw more triangles as illustrated

Finish drawing the triangles around the sides of the cylinder

Draw triangles on the top

Press Triangles to draw triangles

Draw triangles on the top of the cylinder

Finish the top of the cylinder

Finish drawing the triangles on the top of the cylinder

Draw triangles on the base

Press View Rotate as the action

Rotate the view to show the base of the cylinder

Press Draw as the action

Draw the triangles on the base of the cylinder in the same way

Finish the cylinder

Finish drawing the triangles on the base of the cylinder

Change the lighting

Press the lighting button to show smooth lighting

Press the normals button to show lighting normals

The sides of the cylinder are nice and smooth but the top and bottom are wrong, they should have a flat color, so we will fix it

Delete the top and bottom

Delete the triangles on the top and bottom of the cylinder

Copy the lines

Copy (hold CONTROL key) and move the lines at the top and bottom above and below the cylinder as illustrated...

Draw new triangles

Draw new triangles on the top and bottom of the cylinder as illustrated...

Move the top and bottom back

Move the triangles for the top and bottom of the cylinder back into position as illustrated...

Can you see that the new triangles on the top and bottom now have their own set of normals that are independent of the sides of the cylinder?

Cylinder is finished

Press Save to save the model

Next Activity



3D Graphics 101


Wheel