Here are step-by-step video demonstrations for creating a drawing using single-point mechanical perspective.
Step 1. Intro and Setup
Step 2. Locate the Picture Plane and Observation Point
Step 3. Find the Floor Height on your Elevation
Step 4. Draw the Front Elevation
Step 5. Place the Vanishing Point and Set Up the Perspective Drawing
Step 6. Plot Points and Find the Perspective Lines
Step 7. Draw the Center Cube
Step 8. Draw the Sides of the Cone
Step 9. Plot a Curve in Perspective