101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
package system
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import (
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"image/color"
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"strings"
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"code.rocketnine.space/tslocum/brownboxbatman/component"
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"code.rocketnine.space/tslocum/brownboxbatman/world"
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"code.rocketnine.space/tslocum/gohan"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/ebitenutil"
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)
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type RenderMessageSystem struct {
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op *ebiten.DrawImageOptions
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logoImg *ebiten.Image
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msgImg *ebiten.Image
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tmpImg *ebiten.Image
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}
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func NewRenderMessageSystem() *RenderMessageSystem {
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s := &RenderMessageSystem{
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op: &ebiten.DrawImageOptions{},
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logoImg: ebiten.NewImage(1, 1),
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msgImg: ebiten.NewImage(1, 1),
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tmpImg: ebiten.NewImage(200, 200),
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}
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return s
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}
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func (s *RenderMessageSystem) Needs() []gohan.ComponentID {
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return []gohan.ComponentID{
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component.PositionComponentID,
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component.VelocityComponentID,
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component.WeaponComponentID,
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}
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}
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func (s *RenderMessageSystem) Uses() []gohan.ComponentID {
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return nil
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}
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func (s *RenderMessageSystem) Update(_ *gohan.Context) error {
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if !world.World.GameStarted || world.World.GameOver || !world.World.MessageVisible {
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return nil
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}
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world.World.MessageTicks++
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if world.World.MessageTicks == world.World.MessageDuration {
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world.World.MessageVisible = false
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return nil
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}
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return nil
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}
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func (s *RenderMessageSystem) Draw(_ *gohan.Context, screen *ebiten.Image) error {
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if !world.World.GameStarted || !world.World.MessageVisible {
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return nil
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}
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// Draw message.
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if world.World.MessageUpdated {
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s.drawMessage()
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}
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bounds := s.msgImg.Bounds()
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x := (float64(world.World.ScreenW) / 2) - (float64(bounds.Dx()) / 2)
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y := (float64(world.World.ScreenH) / 2) - (float64(bounds.Dy()) / 2)
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s.op.GeoM.Reset()
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s.op.GeoM.Translate(x, y)
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screen.DrawImage(s.msgImg, s.op)
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return nil
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}
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func (s *RenderMessageSystem) drawMessage() {
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split := strings.Split(world.World.MessageText, "\n")
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width := 0
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for _, line := range split {
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lineSize := len(line) * 12
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if lineSize > width {
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width = lineSize
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}
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}
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height := len(split) * 32
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const padding = 8
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width, height = width+padding*2, height+padding*2
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s.msgImg = ebiten.NewImage(width, height)
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s.msgImg.Fill(color.RGBA{17, 17, 17, 255})
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s.tmpImg.Clear()
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s.tmpImg = ebiten.NewImage(width*2, height*2)
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s.op.GeoM.Reset()
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s.op.GeoM.Scale(2, 2)
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s.op.GeoM.Translate(float64(padding), float64(padding))
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ebitenutil.DebugPrint(s.tmpImg, world.World.MessageText)
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s.msgImg.DrawImage(s.tmpImg, s.op)
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s.op.ColorM.Reset()
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}
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