Adding pieces and basic bag mechanics

1 files changed, 44 insertions, 17 deletions

diff --git a/tris/core.go b/tris/core.go
index 41d1beb..07b4b64 100644
--- a/tris/core.go
+++ b/tris/core.go
@@ -1,30 +1,57 @@
 package tris
 
-type PieceType int
+type Point struct {
+	X, Y int
+}
+
+type Piece [4]uint16
+
+// A table that represents each piece from https://tetris.fandom.com/wiki/SRS
+// in binary starting with 1 top left going per row, here in hexadecimal shorthand.
+var (
+	IPiece = Piece{0x0F00, 0x4444, 0x00F0, 0x2222}
+	JPiece = Piece{0x1700, 0x6220, 0x0740, 0x2230}
+	LPiece = Piece{0x4700, 0x2260, 0x0710, 0x3220}
+	OPiece = Piece{0x6600, 0x6600, 0x6600, 0x6600}
+	SPiece = Piece{0x6300, 0x2640, 0x0630, 0x1320}
+	TPiece = Piece{0x2700, 0x2620, 0x0720, 0x2320}
+	ZPiece = Piece{0x3600, 0x4620, 0x0360, 0x2310}
+)
+
+type Rotation int
 
 const (
-	IPiece PieceType = iota
-	JPiece
-	LPiece
-	SPiece
-	ZPiece
-	TPiece
-	OPiece
+	Spawn Rotation = iota
+	Clockwise
+	Flip
+	CounterClockwise
 )
 
-type Point struct {
-	X, Y int
+type Placement struct {
+	piece Piece
+	X     int
+	Y     int
+	Rot   Rotation
+	Lock  int
 }
 
-type Piece struct {
-	Type   PieceType
-	RelX   int
-	RelY   int
-	Layout []Point
-	Lock   int
+type Bag []Piece
+
+var LockDelay = 30
+
+var ReferenceBag = Bag{IPiece, JPiece, LPiece, OPiece, SPiece, TPiece, ZPiece}
+
+func (b Bag) Randomize() Bag { //TODO: implement randomizer
+	return b
 }
 
-type Bag []Piece
+func (b *Bag) Pick() Placement {
+	if len(*b) == 0 {
+		b = &ReferenceBag.Randomize()
+	}
+	piece := Placement{piece: Bag[0], X: 3, Y: -2, Lock: LockDelay}
+	*b = *b[1:]
+}
 
 type Field [20][10]bool