mirror of
https://github.com/irmen/prog8.git
synced 2024-07-27 12:29:24 +00:00
461 lines
16 KiB
Lua
461 lines
16 KiB
Lua
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; TehTriz - a Tetris clone.
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;
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; @todo: slow down joystick input
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; @todo: holding a block
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; @todo: show next 2 blocks instead of just 1
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; @todo: deal with rotation when block is against a wall or another block (wall kicks) (if no rotate in place possible: move 1 left, try rotate, else move 1 right, try rotate, else no rotation possible)
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; @todo: simple sound effects? slight click when moving, swish when rotating/dropping, soft explosion when lines are cleared, buzz at game over
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~ main {
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const ubyte boardOffsetX = 14
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const ubyte boardOffsetY = 3
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const ubyte boardWidth = 10
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const ubyte boardHeight = 20
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const ubyte startXpos = boardOffsetX + 3
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const ubyte startYpos = boardOffsetY - 2
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ubyte lines
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uword score
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ubyte xpos
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ubyte ypos
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ubyte nextBlock
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sub start() {
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@(650) = 128 ; set all keys to repeat
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newGame()
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drawBoard()
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gameOver() ; @todo fix game corruption because loop is called multiple times (???)
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newgame:
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newGame()
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drawBoard()
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spawnNextBlock()
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ubyte joystick_delay=1
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waitkey:
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if c64.TIME_LO==30 {
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c64.TIME_LO = 0
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if blocklogic.canMoveDown(xpos, ypos) {
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; slowly move the block down
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drawBlock(xpos, ypos, 32)
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ypos++
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drawBlock(xpos, ypos, 160)
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} else {
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; block can't move further down!
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; check if the game area is full, if not, spawn the next block at the top.
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if blocklogic.isGameOver(xpos, ypos) {
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gameOver()
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goto newgame
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} else {
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spawnNextBlock()
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}
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}
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}
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ubyte key=c64.GETIN()
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ubyte joystick1 = c64.CIA1PRB
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if key==0 and joystick1==255 goto waitkey
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if joystick1!=255 {
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joystick_delay--
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if_nz goto waitkey
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}
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if key==157 or key==',' or not (joystick1 & 4) {
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; move left
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if blocklogic.canMoveLeft(xpos, ypos) {
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drawBlock(xpos, ypos, 32)
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xpos--
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drawBlock(xpos, ypos, 160)
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}
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}
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else if key==29 or key=='.' or not (joystick1 & 8) {
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; move right
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if blocklogic.canMoveRight(xpos, ypos) {
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drawBlock(xpos, ypos, 32)
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xpos++
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drawBlock(xpos, ypos, 160)
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}
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}
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else if key==17 or key=='m' or not (joystick1 & 2) {
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; move down faster
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if blocklogic.canMoveDown(xpos, ypos) {
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drawBlock(xpos, ypos, 32)
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ypos++
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drawBlock(xpos, ypos, 160)
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}
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}
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else if key==145 or key==' ' or not (joystick1 & 1) {
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; drop down immediately
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drawBlock(xpos, ypos, 32)
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ypos = boardOffsetY+boardHeight-4 ; @todo determine proper y position
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drawBlock(xpos, ypos, 160)
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}
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else if key=='z' { ; no joystick equivalent (there is only 1 fire button)
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; rotate counter clockwise
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if blocklogic.canRotateCCW(xpos, ypos) {
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drawBlock(xpos, ypos, 32)
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blocklogic.rotateCCW()
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drawBlock(xpos, ypos, 160)
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}
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}
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else if key=='x' or not (joystick1 & 16) {
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; rotate clockwise
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if blocklogic.canRotateCW(xpos, ypos) {
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drawBlock(xpos, ypos, 32)
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blocklogic.rotateCW()
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drawBlock(xpos, ypos, 160)
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}
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}
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joystick_delay = 140 ; this more or less slows down the joystick movements to the rate of what key repeats do
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; @todo check if line(s) are full -> flash/clear line(s) + add score + move rest down
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goto waitkey
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}
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sub gameOver() {
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c64scr.PLOT(7, 7)
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c64.CHROUT('U')
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c64scr.print("────────────────────────")
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c64.CHROUT('I')
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c64scr.PLOT(7, 8)
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c64scr.print("│*** g a m e o v e r ***│")
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c64scr.PLOT(7, 9)
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c64.CHROUT('J')
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c64scr.print("────────────────────────")
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c64.CHROUT('K')
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c64scr.PLOT(7, 18)
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c64.CHROUT('U')
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c64scr.print("────────────────────────")
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c64.CHROUT('I')
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c64scr.PLOT(7, 19)
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c64scr.print("│ f1 for new game │")
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c64scr.PLOT(7, 20)
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c64.CHROUT('J')
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c64scr.print("────────────────────────")
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c64.CHROUT('K')
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while(c64.GETIN()!=133) {
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; endless loop until user presses F1 to restart the game
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}
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}
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sub newGame() {
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lines = 0
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score = 0
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xpos = startXpos
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ypos = startYpos
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nextBlock = rnd() % 7
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c64.CLEARSCR()
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}
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sub spawnNextBlock() {
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c64.TIME_LO = 0
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blocklogic.newCurrentBlock(nextBlock)
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nextBlock = (rnd() + c64.RASTER) % 7
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drawNextBlock()
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xpos = startXpos
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ypos = startYpos
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drawBlock(xpos, ypos, 160)
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}
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sub drawBoard() {
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c64.COLOR = 7
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c64scr.PLOT(1,1)
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c64scr.print("irmen's")
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c64scr.PLOT(1,2)
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c64scr.print("teh▁triz")
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c64.COLOR = 5
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c64scr.PLOT(28,3)
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c64scr.print("next:")
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c64scr.PLOT(28,10)
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c64scr.print("lines:")
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c64scr.PLOT(28,14)
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c64scr.print("score:")
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c64.COLOR = 12
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c64scr.PLOT(28,18)
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c64scr.print("controls:")
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c64.COLOR = 11
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c64scr.PLOT(27,19)
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c64scr.print("z/x rotate")
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c64scr.PLOT(27,20)
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c64scr.print(",/. move")
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c64scr.PLOT(27,21)
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c64scr.print("spc drop")
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c64scr.PLOT(27,22)
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c64scr.print(" m descend")
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c64scr.PLOT(27,23)
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c64scr.print("or joystick1")
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c64scr.setcc(boardOffsetX-1, boardOffsetY-2, 255, 0) ; invisible barrier
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c64scr.setcc(boardOffsetX-1, boardOffsetY-3, 255, 0) ; invisible barrier
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c64scr.setcc(boardOffsetX+boardWidth, boardOffsetY-2, 255, 0) ; invisible barrier
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c64scr.setcc(boardOffsetX+boardWidth, boardOffsetY-3, 255, 0) ; invisible barrier
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c64scr.setcc(boardOffsetX-1, boardOffsetY-1, 108, 12)
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c64scr.setcc(boardOffsetX+boardWidth, boardOffsetY-1, 123, 12)
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c64scr.setcc(boardOffsetX+boardWidth, boardOffsetY-1, 123, 12)
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c64scr.setcc(boardOffsetX-1, boardOffsetY+boardHeight, 124, 12)
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c64scr.setcc(boardOffsetX+boardWidth, boardOffsetY+boardHeight, 126, 12)
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ubyte i
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for i in boardOffsetX+boardWidth-1 to boardOffsetX step -1 {
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c64scr.setcc(i, boardOffsetY-3, 255, 0) ; invisible barrier
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c64scr.setcc(i, boardOffsetY+boardHeight, 69, 11)
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}
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for i in boardOffsetY+boardHeight-1 to boardOffsetY step -1 {
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c64scr.setcc(boardOffsetX-1, i, 89, 11)
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c64scr.setcc(boardOffsetX+boardWidth, i, 84, 11)
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}
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for i in 7 to 0 step -1 {
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blocklogic.newCurrentBlock(i)
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drawBlock(3, 3+i*3, 102) ; 102 = stipple
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}
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drawScore()
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}
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sub drawScore() {
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c64.COLOR=1
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c64scr.PLOT(30,11)
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c64scr.print_ub(lines)
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c64scr.PLOT(30,15)
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c64scr.print_uw(score)
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}
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sub drawNextBlock() {
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for ubyte x in 31 to 28 step -1 {
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c64scr.setcc(x, 5, ' ', 0)
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c64scr.setcc(x, 6, ' ', 0)
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}
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; reuse the normal block draw routine (because we can't manipulate array pointers yet)
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ubyte prev = blocklogic.currentBlockNum
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blocklogic.newCurrentBlock(nextBlock)
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drawBlock(28, 5, 160)
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blocklogic.newCurrentBlock(prev)
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}
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sub drawBlock(ubyte x, ubyte y, ubyte character) {
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for ubyte i in 15 to 0 step -1 {
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ubyte c=blocklogic.currentBlock[i]
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if c
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c64scr.setcc((i&3)+x, (i/4)+y, character, c)
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}
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}
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}
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~ blocklogic {
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ubyte currentBlockNum
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ubyte[16] currentBlock
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ubyte[16] rotated
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; the 7 tetrominos
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ubyte[16] blockI = [0,0,0,0, ; cyan ; note: special rotation (around matrix center)
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3,3,3,3,
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0,0,0,0,
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0,0,0,0]
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ubyte[16] blockJ = [6,0,0,0, ; blue
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6,6,6,0,
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0,0,0,0,
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0,0,0,0]
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ubyte[16] blockL = [0,0,8,0, ; orange
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8,8,8,0,
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0,0,0,0,
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0,0,0,0]
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ubyte[16] blockO = [0,7,7,0, ; yellow ; note: no rotation (square)
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0,7,7,0,
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0,0,0,0,
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0,0,0,0]
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ubyte[16] blockS = [0,5,5,0, ; green
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5,5,0,0,
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0,0,0,0,
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0,0,0,0]
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ubyte[16] blockT = [0,4,0,0, ; purple
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4,4,4,0,
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0,0,0,0,
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0,0,0,0]
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ubyte[16] blockZ = [2,2,0,0, ; red
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0,2,2,0,
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0,0,0,0,
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0,0,0,0]
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; @todo would be nice to have a pointer type, like so:
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; uword[7] blocks = [&blockI, &blockJ, &blockL, &blockO, &blockS, &blockT, &blockZ]
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sub newCurrentBlock(ubyte block) {
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currentBlockNum = block
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if block==0
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memcopy(blockI, currentBlock, len(currentBlock))
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else if block==1
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memcopy(blockJ, currentBlock, len(currentBlock))
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else if block==2
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memcopy(blockL, currentBlock, len(currentBlock))
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else if block==3
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memcopy(blockO, currentBlock, len(currentBlock))
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else if block==4
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memcopy(blockS, currentBlock, len(currentBlock))
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else if block==5
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memcopy(blockT, currentBlock, len(currentBlock))
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else if block==6
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memcopy(blockZ, currentBlock, len(currentBlock))
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}
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sub rotateCW() {
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; rotates the current block clockwise.
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if currentBlockNum==0 {
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; the 'I' block rotates a 4x4 matrix around the center
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rotated[0] = currentBlock[12]
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rotated[1] = currentBlock[8]
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rotated[2] = currentBlock[4]
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rotated[3] = currentBlock[0]
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rotated[4] = currentBlock[13]
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rotated[5] = currentBlock[9]
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rotated[6] = currentBlock[5]
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rotated[7] = currentBlock[1]
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rotated[8] = currentBlock[14]
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rotated[9] = currentBlock[10]
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rotated[10] = currentBlock[6]
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rotated[11] = currentBlock[2]
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rotated[12] = currentBlock[15]
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rotated[13] = currentBlock[11]
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rotated[14] = currentBlock[7]
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rotated[15] = currentBlock[3]
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}
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else if currentBlockNum!=3 {
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; rotate all blocks (except 3, the square) around their center square in a 3x3 matrix
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memset(rotated, len(rotated), 0)
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rotated[0] = currentBlock[8]
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rotated[1] = currentBlock[4]
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rotated[2] = currentBlock[0]
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rotated[4] = currentBlock[9]
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rotated[5] = currentBlock[5]
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rotated[6] = currentBlock[1]
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rotated[8] = currentBlock[10]
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rotated[9] = currentBlock[6]
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rotated[10] = currentBlock[2]
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}
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memcopy(rotated, currentBlock, len(currentBlock))
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}
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sub rotateCCW() {
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; rotates the current block counterclockwise.
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if currentBlockNum==0 {
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; the 'I' block rotates a 4x4 matrix around the center
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rotated[0] = currentBlock[3]
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rotated[1] = currentBlock[7]
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rotated[2] = currentBlock[11]
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rotated[3] = currentBlock[15]
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rotated[4] = currentBlock[2]
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rotated[5] = currentBlock[6]
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rotated[6] = currentBlock[10]
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rotated[7] = currentBlock[14]
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rotated[8] = currentBlock[1]
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rotated[9] = currentBlock[5]
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rotated[10] = currentBlock[9]
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rotated[11] = currentBlock[13]
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rotated[12] = currentBlock[0]
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rotated[13] = currentBlock[4]
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rotated[14] = currentBlock[8]
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rotated[15] = currentBlock[12]
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}
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else if currentBlockNum!=3 {
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; rotate all blocks (except 3, the square) around their center square in a 3x3 matrix
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memset(rotated, len(rotated), 0)
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rotated[0] = currentBlock[2]
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rotated[1] = currentBlock[6]
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rotated[2] = currentBlock[10]
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rotated[4] = currentBlock[1]
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rotated[5] = currentBlock[5]
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rotated[6] = currentBlock[9]
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rotated[8] = currentBlock[0]
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rotated[9] = currentBlock[4]
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rotated[10] = currentBlock[8]
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}
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memcopy(rotated, currentBlock, len(currentBlock))
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}
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; For movement checking it is not needed to clamp the x/y coordinates,
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; because we have to check for brick collisions anyway.
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; The full play area is bordered by (in)visible characters that will collide.
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; Collision is determined by reading the screen data directly.
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; This means the current position of the block on the screen has to be cleared first,
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; and redrawn after the collision result has been determined.
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sub canRotateCW(ubyte xpos, ubyte ypos) -> ubyte {
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main.drawBlock(xpos, ypos, 32)
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rotateCW()
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ubyte collision = collides(xpos, ypos)
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rotateCCW()
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main.drawBlock(xpos, ypos, 160)
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return not collision
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}
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sub canRotateCCW(ubyte xpos, ubyte ypos) -> ubyte {
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main.drawBlock(xpos, ypos, 32)
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rotateCCW()
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ubyte collision = collides(xpos, ypos)
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rotateCW()
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main.drawBlock(xpos, ypos, 160)
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return not collision
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}
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sub canMoveLeft(ubyte xpos, ubyte ypos) -> ubyte {
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main.drawBlock(xpos, ypos, 32)
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ubyte collision = collides(xpos-1, ypos)
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main.drawBlock(xpos, ypos, 160)
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return not collision
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}
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sub canMoveRight(ubyte xpos, ubyte ypos) -> ubyte {
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main.drawBlock(xpos, ypos, 32)
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ubyte collision = collides(xpos+1, ypos)
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main.drawBlock(xpos, ypos, 160)
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return not collision
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}
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sub canMoveDown(ubyte xpos, ubyte ypos) -> ubyte {
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main.drawBlock(xpos, ypos, 32)
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ubyte collision = collides(xpos, ypos+1)
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main.drawBlock(xpos, ypos, 160)
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return not collision
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}
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sub collides(ubyte xpos, ubyte ypos) -> ubyte {
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return currentBlock[0] and c64scr.getchr(xpos, ypos)!=32
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or currentBlock[1] and c64scr.getchr(xpos+1, ypos)!=32
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or currentBlock[2] and c64scr.getchr(xpos+2, ypos)!=32
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or currentBlock[3] and c64scr.getchr(xpos+3, ypos)!=32
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or currentBlock[4] and c64scr.getchr(xpos, ypos+1)!=32
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or currentBlock[5] and c64scr.getchr(xpos+1, ypos+1)!=32
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or currentBlock[6] and c64scr.getchr(xpos+2, ypos+1)!=32
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or currentBlock[7] and c64scr.getchr(xpos+3, ypos+1)!=32
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or currentBlock[8] and c64scr.getchr(xpos, ypos+2)!=32
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or currentBlock[9] and c64scr.getchr(xpos+1, ypos+2)!=32
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or currentBlock[10] and c64scr.getchr(xpos+2, ypos+2)!=32
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or currentBlock[11] and c64scr.getchr(xpos+3, ypos+2)!=32
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or currentBlock[12] and c64scr.getchr(xpos, ypos+3)!=32
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or currentBlock[13] and c64scr.getchr(xpos+1, ypos+3)!=32
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or currentBlock[14] and c64scr.getchr(xpos+2, ypos+3)!=32
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or currentBlock[15] and c64scr.getchr(xpos+3, ypos+3)!=32
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}
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sub isGameOver(ubyte xpos, ubyte ypos) -> ubyte {
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return ypos==main.startYpos and not canMoveDown(xpos, ypos)
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}
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}
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