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|
package selection
import (
"age_of_empires/ecs"
"age_of_empires/physics"
"math"
"github.com/hajimehoshi/ebiten/v2"
)
const HALO_WIDTH = 10
type Priority int
const (
Unit Priority = iota
Building
)
type GlobalSelection struct {
IsActive bool
Start physics.Point
}
type Selection struct {
IsSelected bool
Halo *ebiten.Image
Priority Priority
}
type Multiple struct {
Bounds physics.Rectangle
Preselected []*ecs.Component[Selection]
}
func NewMultiple(start physics.Point, end physics.Point) Multiple {
return Multiple{
Bounds: physics.Rectangle{Min: start, Max: end}.Canon(),
Preselected: []*ecs.Component[Selection]{},
}
}
func (m *Multiple) Preselect(position ecs.Component[physics.Point], bounds physics.Rectangle, selection *ecs.Component[Selection]) {
if !selection.IsEnabled {
return
}
selection.Value.IsSelected = false
if m.Bounds.Overlaps(bounds) {
m.Preselected = append(m.Preselected, selection)
}
}
func (m *Multiple) Select() {
if len(m.Preselected) == 0 {
return
}
highestPriority := Priority(math.MaxInt)
for _, selection := range m.Preselected {
if selection.Value.Priority < highestPriority {
highestPriority = selection.Value.Priority
}
}
for _, selection := range m.Preselected {
if selection.Value.Priority == highestPriority {
selection.Value.IsSelected = true
}
}
}
type Single struct {
Cursor physics.Point
HasSelected bool
}
func NewSingle(cursor physics.Point) Single {
return Single{
Cursor: cursor,
HasSelected: false,
}
}
func (s *Single) Select(position ecs.Component[physics.Point], bounds physics.Rectangle, selection *ecs.Component[Selection]) {
if !selection.IsEnabled {
return
}
selection.Value.IsSelected = false
if s.HasSelected || !s.Cursor.In(bounds) {
return
}
selection.Value.IsSelected = true
}
|
