doodle/level/types.go
Noah Petherbridge e1cbff8c3f Add Palette Window and Palette Support to Edit Mode
* Add ui.Window to easily create reusable windows with titles.
* Add a palette window (panel) to the right edge of the Edit Mode.
  * Has Radio Buttons listing the colors available in the palette.
* Add palette support to Edit Mode so when you draw pixels, they take
  on the color and attributes of the currently selected Swatch in your
  palette.
* Revise the on-disk format to better serialize the Palette object to
  JSON.
* Break Play Mode: collision detection fails because the Grid key
  elements are now full Pixel objects (which retain their Palette and
  Swatch properties).
  * The Grid will need to be re-worked to separate X,Y coordinates from
    the Pixel metadata to just test "is something there, and what is
    it?"
2018-08-10 17:19:47 -07:00

77 lines
1.9 KiB
Go

package level
import (
"encoding/json"
"fmt"
)
// Level is the container format for Doodle map drawings.
type Level struct {
Version int32 `json:"version"` // File format version spec.
GameVersion string `json:"gameVersion"` // Game version that created the level.
Title string `json:"title"`
Author string `json:"author"`
Password string `json:"passwd"`
Locked bool `json:"locked"`
// Level size.
Width int32 `json:"w"`
Height int32 `json:"h"`
// The Palette holds the unique "colors" used in this map file, and their
// properties (solid, fire, slippery, etc.)
Palette *Palette `json:"palette"`
// Pixels is a 2D array indexed by [X][Y]. The cell values are indexes into
// the Palette.
Pixels []*Pixel `json:"pixels"`
}
// New creates a blank level object with all its members initialized.
func New() *Level {
return &Level{
Version: 1,
Pixels: []*Pixel{},
Palette: &Palette{},
}
}
// Pixel associates a coordinate with a palette index.
type Pixel struct {
X int32 `json:"x"`
Y int32 `json:"y"`
PaletteIndex int32 `json:"p"`
// Private runtime values.
Palette *Palette `json:"-"` // pointer to its palette, TODO: needed?
Swatch *Swatch `json:"-"` // pointer to its swatch, for when rendered.
}
func (p Pixel) String() string {
return fmt.Sprintf("Pixel<%s '%s' (%d,%d)>", p.Swatch.Color, p.Swatch.Name, p.X, p.Y)
}
// MarshalJSON serializes a Pixel compactly as a simple list.
func (p Pixel) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf(
`[%d, %d, %d]`,
p.X, p.Y, p.PaletteIndex,
)), nil
}
// UnmarshalJSON loads a Pixel from JSON again.
func (p *Pixel) UnmarshalJSON(text []byte) error {
var triplet []int32
err := json.Unmarshal(text, &triplet)
if err != nil {
return err
}
p.X = triplet[0]
p.Y = triplet[1]
if len(triplet) > 2 {
p.PaletteIndex = triplet[2]
}
return nil
}