feat: added a few new parameters to add gapping for reading from images.

animation.go

@@ -36,7 +36,7 @@ type AnimationId int
 type AnimationSet map[AnimationId] Animation
 func AnimationSetFromImage(
 	img *Image,
-	w, h int,
+	w, h, gx, gy int,
 	defines ...AnimationDefine,
 ) (AnimationSet, error) {
 	set := AnimationSet{}
@@ -50,8 +50,8 @@ func AnimationSetFromImage(
 			idx := define.Indexes[i]
 			animation[i] = ebiten.NewImageFromImage(img.SubImage(
 				ImageRect{
-					Min: ImagePoint{idx.X*fw, idx.Y*fh},
-					Max: ImagePoint{(idx.X+1)*fw, (idx.Y+1)*fh},
+					Min: ImagePoint{idx.X*fw+gx, idx.Y*fh+gy},
+					Max: ImagePoint{(idx.X+1)*fw-gx, (idx.Y+1)*fh-gy},
 				},
 			))
 		}

cmd/test/main.go

@@ -55,6 +55,7 @@ func main() {
 	playerAnimations, _ = gg.AnimationSetFromImage(
 		playerImg,
 		8, 3,
+		10, 1,
 		gg.AD(Stand).DefRow(0, 0, 1, 2, 3, 4),
 		gg.AD(Walk).DefRow(1, 0, 1, 2, 3, 4, 5, 6, 7),
 	)