71 lines
1.2 KiB
Go
71 lines
1.2 KiB
Go
package gg
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import (
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"github.com/hajimehoshi/ebiten/v2"
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)
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type Sprite struct {
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Transform
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ShaderOptions
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Floating, Visible bool
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}
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func (s *Sprite) Draw(
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e *Engine,
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i *Image,
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) {
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// Nothing to draw.
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if s.Images[0] == nil {
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return
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}
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t := s.Rectangle().Transform
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m := &Matrix{}
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m.Concat(t.Matrix())
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if !s.Floating {
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m.Concat(e.Camera().RealMatrix(
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e,
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))
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}
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// Drawing without shader.
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if s.Shader == nil {
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opts := &ebiten.DrawImageOptions{}
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opts.GeoM = *m
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i.DrawImage(s.Images[0], opts)
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return
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}
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w, h := s.Images[0].Size()
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// Drawing with shader.
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opts := &ebiten.DrawRectShaderOptions{
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Images: s.Images,
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Uniforms: s.Uniforms,
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GeoM: *m,
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}
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i.DrawRectShader(w, h, s.Shader, opts)
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}
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// Check is sprite is visible.
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func (s *Sprite) IsVisible() bool {
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return s.Visible
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}
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// Return the rectangle that contains the sprite.
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func (s *Sprite) Rectangle() Rectangle {
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if s.Images[0] == nil {
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panic("trying to get rectangle for nil image pointer")
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}
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w, h := s.Images[0].Size()
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t := s.Transform
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t.RA.X *= Float(w)
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t.RA.Y *= Float(h)
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return Rectangle{t}
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}
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func (s *Sprite) Triangles() Triangles {
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return s.Rectangle().Triangles()
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}
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