apply isoprojection in Sprite
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88ded18d50
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5699d70be6
2 changed files with 8 additions and 6 deletions
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@ -22,7 +22,7 @@ func init() {
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// Sprite combines an Actor with the ability to Draw from a single spritesheet.
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type Sprite struct {
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Actor Actor
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FrameOffset image.Point
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DrawOffset image.Point
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Hidden
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Sheet Sheet
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@ -56,9 +56,11 @@ func (s *Sprite) SetAnim(a *Anim) {
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s.anim = a
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}
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// Transform returns a translation by the FrameOffset.
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// Transform returns a translation by the DrawOffset and the iso-projected Pos.
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func (s *Sprite) Transform(pt Transform) (tf Transform) {
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tf.Opts.GeoM.Translate(cfloat(s.Actor.Pos.XY().Add(s.FrameOffset)))
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tf.Opts.GeoM.Translate(cfloat(
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s.Actor.Pos.IsoProject(pt.IsoProjection).Add(s.DrawOffset),
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))
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return tf.Concat(pt)
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}
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4
main.go
4
main.go
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@ -197,10 +197,10 @@ func level1() *engine.Scene {
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Sprite: engine.Sprite{
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Actor: engine.Actor{
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CollisionDomain: "level_1",
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Pos: engine.Pt3(100, 100, 9),
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Pos: engine.Pt3(100, 100, 0),
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Size: engine.Pt3(8, 16, 8),
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},
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FrameOffset: image.Pt(-1, 0),
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DrawOffset: image.Pt(-1, 0),
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Sheet: engine.Sheet{
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AnimDefs: map[string]*engine.AnimDef{
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"idle_left": {Steps: []engine.AnimStep{
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