ProjectionSpec

Struct

Source: Projection.h

Description

Plain six-int aggregate: the screen anchor of cell (0, 0) plus the two screen-space axis vectors of the cell grid.

The two axis vectors form the columns of a 2x2 integer matrix. No member functions, no derived fields, no per-instance runtime state — a constexpr ProjectionSpec costs zero SRAM. The determinant is deliberately NOT a field: see projectionDet().

Defaults form the identity basis, so a default-constructed spec maps every cell to itself.

Layout	Tile	Value	det
Orthogonal	16x16	{0, 0, 16, 0, 0, 16}	256
Isometric 2:1	32x16	{0, 0, 16, 8, -16, 8}	256
Isometric 1:1	32x32	{0, 0, 16, 16, -16, 16}	512
Oblique	16x16	{0, 0, 16, 0, 8, 16}	256

Properties

Name	Type	Description
originX	int	Screen X of cell (0, 0)'s anchor, in pixels.
originY	int	Screen Y of cell (0, 0)'s anchor, in pixels.
axisXx	int	Screen X delta per +1 cellX.
axisXy	int	Screen Y delta per +1 cellX.
axisYx	int	Screen X delta per +1 cellY.
axisYy	int	Screen Y delta per +1 cellY.