131 lines
2.1 KiB
Go
131 lines
2.1 KiB
Go
package world
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import (
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"image/color"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/vector"
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)
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// Surface types
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type SurfaceTag int
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const (
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TagGround SurfaceTag = iota
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TagWall
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TagPlatform
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TagHazard
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)
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type Surface struct {
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X float64
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Y float64
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Width float64
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Height float64
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Tag SurfaceTag
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Color color.NRGBA
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}
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func (s *Surface) Bounds() (x, y, width, height float64) {
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return s.X, s.Y, s.Width, s.Height
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}
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func (s *Surface) Contains(x, y float64) bool {
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return x >= s.X && x <= s.X+s.Width && y >= s.Y && y <= s.Y+s.Height
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}
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func (s *Surface) IsSolid() bool {
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switch s.Tag {
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case TagGround, TagWall, TagPlatform:
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return true
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case TagHazard:
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return false
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default:
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return false
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}
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}
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func (s *Surface) IsWalkable() bool {
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switch s.Tag {
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case TagGround, TagPlatform:
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return true
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case TagWall, TagHazard:
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return false
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default:
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return false
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}
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}
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func (s *Surface) Draw(screen *ebiten.Image) {
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drawX := float32(int(s.X + 0.5))
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drawY := float32(int(s.Y + 0.5))
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drawWidth := float32(int(s.Width + 0.5))
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drawHeight := float32(int(s.Height + 0.5))
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vector.FillRect(
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screen,
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drawX,
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drawY,
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drawWidth,
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drawHeight,
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s.Color,
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false,
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)
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}
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// World container
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type World struct {
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Surfaces []*Surface
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}
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func NewWorld() *World {
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return &World{
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Surfaces: make([]*Surface, 0),
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}
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}
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func (w *World) AddSurface(surface *Surface) {
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w.Surfaces = append(w.Surfaces, surface)
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}
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func (w *World) GetSurfacesWithTag(tag SurfaceTag) []*Surface {
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var result []*Surface
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for _, s := range w.Surfaces {
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if s.Tag == tag {
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result = append(result, s)
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}
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}
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return result
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}
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func (w *World) GetSurfacesAt(x, y float64) []*Surface {
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var result []*Surface
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for _, s := range w.Surfaces {
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if s.Contains(x, y) {
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result = append(result, s)
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}
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}
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return result
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}
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func (w *World) CheckCollision(x, y, width, height float64) *Surface {
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for _, s := range w.Surfaces {
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if !s.IsSolid() {
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continue
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}
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if x+width > s.X && x < s.X+s.Width &&
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y+height > s.Y && y < s.Y+s.Height {
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return s
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}
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}
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return nil
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}
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func (w *World) Draw(screen *ebiten.Image) {
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for _, s := range w.Surfaces {
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s.Draw(screen)
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}
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}
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