1 files changed, 190 insertions, 0 deletions
diff --git a/cube/turns.go b/cube/turns.go
new file mode 100644
index 0000000..2129f26
--- /dev/null
+++ b/cube/turns.go
@@ -0,0 +1,190 @@
+package cube
+
+func (a *row) flip() {
+	for left, right := 0, len(*a)-1; left < right; left, right = left+1, right-1 {
+		(*a)[left], (*a)[right] = (*a)[right], (*a)[left]
+	}
+}
+
+func (f *face) transpose() {
+	l := len(*f)
+	nf := make(face, l)
+
+	for i := 0; i < l; i++ {
+		nf[i] = make(row, l)
+		for j := 0; j < l; j++ {
+			nf[i][j] = (*f)[j][i]
+		}
+	}
+
+	for i := 0; i < l; i++ {
+		for j := 0; j < l; j++ {
+			(*f)[i][j] = nf[i][j]
+		}
+	}
+}
+
+func (f *face) clockwise() {
+	f.transpose()
+
+	for i := 0; i < len(*f); i++ {
+		(*f)[i].flip()
+	}
+}
+
+func (f *face) _clockwise() {
+	for i := 0; i < len(*f); i++ {
+		(*f)[i].flip()
+	}
+
+	f.transpose()
+}
+
+func (c *Cube) Y(layer int) {
+	_layer := c.Size() - layer - 1
+
+	if layer == 0 {
+		c.top.clockwise()
+	} else if _layer == 0 {
+		c.bottom._clockwise()
+	}
+
+	temp := c.front[layer]
+	c.front[layer] = c.right[layer]
+	c.right[layer] = c.back[layer]
+	c.back[layer] = c.left[layer]
+	c.left[layer] = temp
+}
+
+func (c *Cube) Y_(layer int) {
+	_layer := c.Size() - layer - 1
+
+	if layer == 0 {
+		c.top._clockwise()
+	} else if _layer == 0 {
+		c.bottom.clockwise()
+	}
+
+	temp := c.front[layer]
+	c.front[layer] = c.left[layer]
+	c.left[layer] = c.back[layer]
+	c.back[layer] = c.right[layer]
+	c.right[layer] = temp
+}
+
+func (c *Cube) U() {
+	c.Y(0)
+}
+func (c *Cube) U_() {
+	c.Y_(0)
+}
+
+func (c *Cube) D() {
+	c.Y_(c.Size() - 1)
+}
+func (c *Cube) D_() {
+	c.Y(c.Size() - 1)
+}
+
+func (c *Cube) Z(layer int) {
+	_layer := c.Size() - layer - 1
+
+	if layer == 0 {
+		c.front.clockwise()
+	} else if _layer == 0 {
+		c.back._clockwise()
+	}
+
+	temp := c.top[_layer]
+	c.top[_layer] = c.left.colGet(_layer)
+	c.top[_layer].flip()
+	c.left.colSet(_layer, c.bottom[layer])
+	c.bottom[layer] = c.right.colGet(layer)
+	c.bottom[layer].flip()
+	c.right.colSet(layer, temp)
+}
+
+func (c *Cube) Z_(layer int) {
+	_layer := c.Size() - layer - 1
+
+	if layer == 0 {
+		c.front._clockwise()
+	} else if _layer == 0 {
+		c.back.clockwise()
+	}
+
+	temp := c.top[_layer]
+	c.top[_layer] = c.right.colGet(layer)
+	c.bottom[layer].flip()
+	c.right.colSet(layer, c.bottom[layer])
+	c.bottom[layer] = c.left.colGet(layer)
+	temp.flip()
+	c.left.colSet(_layer, temp)
+}
+
+func (c *Cube) F() {
+	c.Z(0)
+}
+func (c *Cube) F_() {
+	c.Z_(0)
+}
+
+func (c *Cube) B() {
+	c.Z_(c.Size() - 1)
+}
+func (c *Cube) B_() {
+	c.Z(c.Size() - 1)
+}
+
+func (c *Cube) X(layer int) {
+	_layer := c.Size() - layer - 1
+
+	if layer == 0 {
+		c.right.clockwise()
+	} else if _layer == 0 {
+		c.left._clockwise()
+	}
+
+	temp := c.top.colGet(_layer)
+	temp.flip()
+	c.top.colSet(_layer, c.front.colGet(_layer))
+	c.front.colSet(_layer, c.bottom.colGet(_layer))
+	t := c.back.colGet(layer)
+	t.flip()
+	c.bottom.colSet(_layer, t)
+	c.back.colSet(layer, temp)
+}
+
+func (c *Cube) X_(layer int) {
+	_layer := c.Size() - layer - 1
+
+	if layer == 0 {
+		c.right._clockwise()
+	} else if _layer == 0 {
+		c.left.clockwise()
+	}
+
+	temp := c.top.colGet(_layer)
+	t := c.back.colGet(layer)
+	t.flip()
+	c.top.colSet(_layer, t)
+	t = c.bottom.colGet(_layer)
+	t.flip()
+	c.back.colSet(layer, t)
+	c.bottom.colSet(_layer, c.front.colGet(_layer))
+	c.front.colSet(_layer, temp)
+}
+
+func (c *Cube) R() {
+	c.X(0)
+}
+func (c *Cube) R_() {
+	c.X_(0)
+}
+
+func (c *Cube) L() {
+	c.X_(c.Size() - 1)
+}
+func (c *Cube) L_() {
+	c.X(c.Size() - 1)
+}