gmcnutt / iso

For C prototypes.

ISO Viewer

For experimenting with 2.5d isometric maps.

Dependencies

Depends on libcu, a C utility lib available at [email protected]:gmcnutt/cutils.git.

Build

make

Usage

Example:

./demo -i mc0.png,mc1.png,mc2.png,mc3.png

That stacks 4 maps on top of each other. Maps must be the same size for this to work.

Key bindings:

<arrow> ..........move cursor
., ...............rotate camera
t  ...............toggle transparency
<page up/down> ...jump between maps (when passable)

Clicking a tile prints some info on stdout.

Maps

Maps are just image files. The color of the pixel determines the terrain type:

    PIXEL_VALUE_TREE = 0x004001ff,
    PIXEL_VALUE_SHRUB = 0x008000ff,
    PIXEL_VALUE_GRASS = 0x00ff00ff,
    PIXEL_VALUE_FLOOR = 0x0000f0ff,
    PIXEL_VALUE_WALL = 0xffffffff

A transparent pixel means "nothing there". Unrecognized colors print an error on stdout but otherwise also mean "nothing there".

Some of the low bits of the blue color control opacity and passability:

    PIXEL_MASK_OPAQUE = 0x00000100, /* blue bit 0 */
    PIXEL_MASK_IMPASSABLE = 0x00000200      /* blue bit 1 */

Opaque terrain blocks field-of-view (FOV). Impassable terrain and no terrain blocks cursor movement.