Click the Green Flag to draw a mountain range. Draw faster by running in Turbo Mode. Draw slower by editing the code and disabling "Run without Screen Refresh" in the "Draw Row" custom block. See the source comments for how to alter the camera angle, mountain height, and landscape colors.
This is an example of drawing an isometric "height map" using the Pen object. The height map is a 2d grayscale image representing the relative height of grid points in an area: black areas are low, while white are high. The heightmap here was taken from Wikipedia's article on "Heightmap", flattened to a single 64k element list. For each point (S, T) there is a translation to screen coordinates: X value is (S - T), and Y value is (-(S+T) / 2). This draws a diamond shape with a compressed vertical view: changing the /2 divisor for Y lets the scene be viewed at a different "angle". Position the Pen at each screen point, and then draw an upward line based on the value of the heightmap at the (S, T) point. The travel distance here is (Z/2), changing this alters the scale of the mountain range - e.g. Z/3 would make the peaks less steep. The image is drawn back-to-front so that foreground peaks will draw over those in the background, maintaining the illusion of a 3d image. This is a "voxel" image because each heightmap point is a 3d column (slice) of the world. This is an example of an orthographic projection - objects in the background do not appear smaller than those in the foreground.
