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package engine
import (
"fmt"
"image/color"
"age_of_empires/ecs"
"age_of_empires/physics"
"age_of_empires/selection"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/text/v2"
"github.com/hajimehoshi/ebiten/v2/vector"
)
func (g *Game) font(size float64) *text.GoTextFace {
f := &text.GoTextFace{Source: g.FaceSource, Size: size}
f.SetVariation(text.MustParseTag("wght"), 500)
return f
}
func (g *Game) Draw(screen *ebiten.Image) {
sx, sy := ebiten.CursorPosition()
cursor := g.Camera.ScreenToWorld(sx, sy)
screenCursor := physics.Point{X: sx, Y: sy}
screen.Fill(soilColor)
camGeoM := g.Camera.GeoM()
required := ecs.CM_Image | ecs.CM_Position
for i, mask := range g.Mask {
if mask&required == required {
position := g.Position[i]
image := g.Image[i]
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(position.X), float64(position.Y))
op.GeoM.Concat(camGeoM)
screen.DrawImage(image, op)
if mask&ecs.CM_Selectable == ecs.CM_Selectable {
selectable := g.Selectable[i]
if selectable.IsSelected {
opt := &ebiten.DrawImageOptions{}
opt.GeoM.Translate(float64(position.X-selection.HaloWidth/2), float64(position.Y-selection.HaloWidth/2))
opt.GeoM.Concat(camGeoM)
screen.DrawImage(selectable.Halo, opt)
if mask&ecs.CM_ResourceSource == ecs.CM_ResourceSource {
source := g.ResourceSource[i]
resourceText := fmt.Sprintf("%d", source.Remaining)
op := &text.DrawOptions{}
op.GeoM.Translate(float64(position.X+5), float64(position.Y+30))
op.GeoM.Concat(camGeoM)
op.ColorScale.ScaleWithColor(color.White)
text.Draw(screen, resourceText, g.font(40), op)
}
if mask&ecs.CM_Spawn == ecs.CM_Spawn {
spawn := g.Spawn[i]
spawnText := fmt.Sprintf("%d", len(spawn.Requests))
op := &text.DrawOptions{}
op.GeoM.Translate(float64(position.X+5), float64(position.Y+70))
op.GeoM.Concat(camGeoM)
op.ColorScale.ScaleWithColor(color.White)
text.Draw(screen, spawnText, g.font(40), op)
if spawn.SpawnTarget.Ok {
spawnTarget := spawn.SpawnTarget.Value
ssx, ssy := g.Camera.WorldToScreen(spawnTarget)
offset := 50 * float32(g.Camera.Zoom)
vector.DrawFilledCircle(screen, float32(ssx)+offset, float32(ssy)+offset, 30*float32(g.Camera.Zoom), Red, true)
}
}
if mask&ecs.CM_Move == ecs.CM_Move {
move := g.Move[i]
dx := image.Bounds().Dx() / 2
dy := image.Bounds().Dy() / 2
last := position
strokeW := 10.0 * float32(g.Camera.Zoom)
for _, point := range move.Path {
lsx, lsy := g.Camera.WorldToScreen(physics.Point{X: last.X + dx, Y: last.Y + dy})
psx, psy := g.Camera.WorldToScreen(physics.Point{X: point.X + dx, Y: point.Y + dy})
vector.StrokeLine(screen, float32(lsx), float32(lsy), float32(psx), float32(psy), strokeW, color.RGBA{256 * 3 / 16, 256 * 3 / 16, 256 * 3 / 16, 256 / 4}, true)
last = point
}
}
}
}
}
}
if g.GlobalSelection.IsActive(cursor) {
g.GlobalSelection.Draw(screen, screenCursor)
}
drawTopBanner(screen, g)
if len(g.GlobalSelection.Selected) > 0 {
drawBottomBanner(screen, g)
}
}
func drawTopBanner(screen *ebiten.Image, g *Game) {
screenBounds := screen.Bounds()
bannerHeight := float32(50)
vector.DrawFilledRect(screen, 0, 0, float32(screenBounds.Dx()), bannerHeight, color.White, true)
resourceText := fmt.Sprintf("Resources: %d", g.ResourceAmount)
op := &text.DrawOptions{}
op.GeoM.Translate(8, 6)
op.ColorScale.ScaleWithColor(color.Black)
text.Draw(screen, resourceText, g.font(30), op)
}
func drawBottomBanner(screen *ebiten.Image, g *Game) {
screenBounds := screen.Bounds()
bannerHeight := float32(40)
bannerTop := screenBounds.Dy() - int(bannerHeight)
vector.DrawFilledRect(screen, 0, float32(bannerTop), float32(screenBounds.Dx()), bannerHeight, color.White, true)
shortcuts := "[Right-click] Action [Q] Patrol [Esc] Deselect"
for _, i := range g.GlobalSelection.Selected {
if g.Mask[i]&ecs.CM_Spawn == ecs.CM_Spawn {
shortcuts += " [S] Spawn unit"
break
}
}
op := &text.DrawOptions{}
op.GeoM.Translate(8, float64(float32(bannerTop)+6))
op.ColorScale.ScaleWithColor(color.Black)
text.Draw(screen, shortcuts, g.font(22), op)
}
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