frame

type ASCII struct {
	SF SetFunc[rune]
	// contains filtered or unexported fields
}

type Frame interface {
	// Apply a luminance value to a point in the frame.
	// If the luminance value was applied, function returns true.
	Set(x, y int, L float64) bool

	// Return the frame to an initial state.
	Reset()

	Print(w io.Writer)
}

type GIF struct {
	Image   *image.Paletted
	Options gif.Options
	SF      SetFunc[color.Color]
}

type Scene struct {
	// Dimensions of the viewport.
	Width, Height int

	// Distance from camera to viewport.
	K1 float64

	// Distance from camera to torus. Essentially equal to TZ since camera is at origin.
	K2 float64

	// Light source vector. Technially should be normalized, but up to the implementation.
	LX, LY, LZ float64
}

type SetFunc[T any] func(L float64) (T, bool)

type Torus struct {
	// Controls the resolution of the cross-sectional circle.
	ThetaSpacing float64

	// Controls the resolution of the revolution of the circle.
	PhiSpacing float64

	// Radius of the cross-sectional circle.
	R1 float64

	// Distance from axis of revolution (Y) to the center of the cross-sectional circle.
	R2 float64

	// Rotation of the torus along the X and Z axes.
	A, B float64
}