add hasArmDownExtension func (3b996389) · Commits · blackheaven / tinygraphs

draw/spaceinvaders/spaceinvaders.go

+25 −14

Original line number	Diff line number	Diff line
		@@ -246,6 +246,29 @@ func hasArmDown(invader invader, armIndex, squares, xQ, yQ int) (armDown bool) {
		return
		}

		func hasArmDownExtension(invader invader, armIndex, squares, xQ, yQ int) (armDownExtension bool) {
		if yQ != armIndex \|\| invader.armsUp \|\| invader.armSize != 3 {
		return
		}
		if invader.arms <= 0 {
		return
		}

		leftOver := squares - invader.length
		half := leftOver / 2

		if (squares - half - half - 1) >= invader.length {
		if xQ == half-1 \|\| xQ == squares-half {
		armDownExtension = true
		}
		} else {
		if xQ == half-2 \|\| xQ == squares+1-half {
		armDownExtension = true
		}
		}
		return
		}

		func hasBody(invader invader, squares, xQ int) (body bool) {
		leftOver := squares - invader.length
		half := leftOver / 2
		@@ -400,21 +423,9 @@ func SpaceInvaders(w http.ResponseWriter, key string, colors []color.RGBA, size
		fill = draw.FillFromRGBA(colorMap[xQ])
		}

		// arm down extension.
		if yQ == armIndex && !invader.armsUp && invader.armSize == 3 {
		leftOver := squares - invader.length
		if invader.arms > 0 {
		if (squares - leftOver/2 - (leftOver / 2) - 1) >= invader.length {
		if xQ == (leftOver/2)-1 \|\| xQ == squares-leftOver/2 {
		if hasArmDownExtension(invader, armIndex, squares, xQ, yQ) {
		fill = draw.FillFromRGBA(colorMap[xQ])
		}
		} else {
		if xQ == (leftOver/2)-2 \|\| xQ == squares+1-leftOver/2 {
		fill = draw.FillFromRGBA(colorMap[xQ])
		}
		}
		}
		}

		// big arm extension
		if yQ == armIndex+1 && !invader.armsUp && invader.armSize == 3 {