From Context Free Art
Primitive Shapes
Ultimately the only shape that Context Free/CFDG knows how to draw are squares, circles, triangles, or fills. Whenever CF encounters a primitive shape in a shape rule it draws it immediately. The sizes of these three shapes are:
- Squares are unit squares. If two squares are drawn one unit apart in x or y then that will be drawn edge-to-edge.
SQUARE []
SQUARE [x 1 b 0.5] // gray square right next to the black square
- Circles are unit circles. They have the same diameter as the side of a square.
- Triangles are unit triangles. The have the same side length as squares.
- Fills draw on the entire canvas
Here is what the primitive shapes look like with respect to each other:
shape foo {
SQUARE []
CIRCLE [b 1]
SQUARE [x 1.5]
TRIANGLE [b 0.5 x 1.5]
SQUARE [x 3]
CIRCLE [b 1 x 3]
TRIANGLE [b 0.5 x 3]
}
As a guide for manipulating shapes in Context Free/CFDG, the following illustration highlights some key coordinates—relative to the current transformation matrix—of the SQUARE, CIRCLE, and TRIANGLE primitives:
