| """Pong. | |
| In Nuke. | |
| """ | |
| import nuke | |
| import time | |
| from random import random | |
| import threading | |
| class Player1Score(Exception): | |
| pass | |
| class Player2Score(Exception): | |
| pass | |
| class Ball(object): | |
| def __init__(self, node): | |
| self.node = node | |
| self.vx = 4 | |
| self.vy = 0 | |
| # Number of nudge()'s since last collision. | |
| # Used to prevent multiple collisions on the same object in | |
| # quick sucession (which makes the ball get stuck in the object) | |
| self.steps_since_collision = 0 | |
| self.delay_between_collisions = 5 | |
| # Getter/setter for ball location | |
| def _setxy(self, v): | |
| x, y = v | |
| nuke.executeInMainThread(self.node.setXYpos, (x, y)) | |
| time.sleep(0.001) | |
| def _getxy(self): | |
| x = self.node.xpos() | |
| y = self.node.ypos() | |
| return x, y | |
| xy = property(_getxy, _setxy) | |
| def nudge(self): | |
| """Moves ball with x/y velocity""" | |
| x, y = self.xy | |
| self.xy = (x + self.vx, y + self.vy) | |
| self.steps_since_collision += 1 | |
| def reset(self, gamebox): | |
| """Reset ball to centre. Reset velocity""" | |
| x, y = gamebox.xpos(), gamebox.ypos() | |
| w, h = gamebox.screenWidth(), gamebox.screenHeight() | |
| cx = x + (w/2) | |
| cy = y + (h/2) | |
| r = 2 - (random() * 4) | |
| if self.vx > 0: | |
| self.vx, self.vy = 4, 0 | |
| else: | |
| self.vx, self.vy = -4, 0 | |
| nuke.executeInMainThread(self.node.setXYpos, (cx, cy)) | |
| def check_paddle(self, paddle): | |
| """Checks collision with paddles""" | |
| if self.steps_since_collision < self.delay_between_collisions: | |
| return | |
| x, y = self.xy | |
| cx, cy = paddle.xpos(), paddle.ypos() | |
| cw, ch = paddle.screenWidth(), paddle.screenHeight() | |
| if y > cy and y < (cy + ch): | |
| # In correct y location | |
| if (x > (cx)) and (x < (cx + cw)): | |
| self.vx = -self.vx | |
| # Add randomness to bounce | |
| self.vy = self.vy + (1.0 - (random() * 2.0)) | |
| self.nudge() | |
| self.steps_since_collision = 0 | |
| def check_gamebox(self, gamebox): | |
| """Checks for collisions with the edge of game box, and raises the | |
| appropriate Player{n}Score exception""" | |
| if self.steps_since_collision < self.delay_between_collisions: | |
| return | |
| sx, sy = gamebox.xpos(), gamebox.ypos() | |
| w, h = gamebox.screenWidth(), gamebox.screenHeight() | |
| maxx = sx + w | |
| maxy = sy + h | |
| x, y = self.xy | |
| if x < sx: | |
| self.vx = -self.vx | |
| self.nudge() | |
| self.steps_since_collision = 0 | |
| raise Player1Score() | |
| elif x > maxx: | |
| self.vx = -self.vx | |
| self.nudge() | |
| self.steps_since_collision = 0 | |
| raise Player2Score() | |
| elif y < sy: | |
| self.vy = -self.vy | |
| self.nudge() | |
| x, y = self.xy | |
| self.xy = (x, sy) | |
| self.steps_since_collision = 0 | |
| elif y > maxy: | |
| self.vy = -self.vy | |
| self.nudge() | |
| x, y = self.xy | |
| self.xy = (x, maxy) | |
| self.steps_since_collision = 0 | |
| class Game(threading.Thread): | |
| def __init__(self, gamebox, ball, player1, player2): | |
| threading.Thread.__init__(self) | |
| self.gamebox = gamebox | |
| self.ball = ball | |
| self.left = player1 | |
| self.right = player2 | |
| self.ball = Ball(self.ball) | |
| self.stop = False | |
| def deletenodes(self): | |
| for x in [self.gamebox, self.left, self.right]: | |
| nuke.delete(nuke.toNode(x.name())) | |
| nuke.delete(self.ball.node) | |
| def gameloop(self): | |
| self.ball.reset(self.gamebox) | |
| time.sleep(0.1) | |
| while not self.stop: | |
| self.ball.nudge() | |
| toincrement = None | |
| try: | |
| self.ball.check_gamebox(self.gamebox) | |
| except Player1Score: | |
| print "Player 1 scored" | |
| toincrement = self.gamebox['p1_score'] | |
| except Player2Score: | |
| print "Player 2 scored" | |
| toincrement = self.gamebox['p2_score'] | |
| if toincrement is not None: | |
| cur = nuke.executeInMainThreadWithResult(toincrement.value) | |
| if cur is None: | |
| cur = 0 | |
| new = cur + 1 | |
| nuke.executeInMainThreadWithResult(toincrement.setValue, new) | |
| self.ball.reset(self.gamebox) | |
| self.ball.check_paddle(paddle = self.left) | |
| self.ball.check_paddle(paddle = self.right) | |
| time.sleep(0.01) | |
| def run(self): | |
| try: | |
| self.gameloop() | |
| except Exception, e: | |
| # Exception in thread doesn't give a useful traceback | |
| # to Nuke console, print one. | |
| import traceback | |
| traceback.print_exc() | |
| raise | |
| def _nudgeplayer(node, vertical): | |
| y = node.ypos() | |
| node.setYpos(y + vertical) | |
| def nudge_up(left = False, right = False, large = False): | |
| global pong | |
| if left: | |
| node = pong.left | |
| elif right: | |
| node = pong.right | |
| else: | |
| raise ValueError("left or right must be True") | |
| _nudgeplayer(node, -40 if large else -20) | |
| def nudge_down(left = False, right = False, large = False): | |
| global pong | |
| if left: | |
| node = pong.left | |
| elif right: | |
| node = pong.right | |
| else: | |
| raise ValueError("left or right must be True") | |
| _nudgeplayer(node, 40 if large else 20) | |
| global pong | |
| pong = None | |
| def stop_pong(): | |
| global pong | |
| if pong is None: | |
| return | |
| else: | |
| print "Stopping pong.." | |
| pong.stop = True | |
| pong.join() | |
| pong.deletenodes() | |
| pong = None | |
| def start_pong(): | |
| stop_pong() | |
| # Make game box | |
| gamebox = nuke.toNode("PONG") | |
| if gamebox is None: | |
| gamebox = nuke.nodes.BackdropNode(bdwidth = 1000, bdheight = 500) | |
| p1s = nuke.Int_Knob('p1_score', 'player 1 score') | |
| p2s = nuke.Int_Knob('p2_score', 'player 2 score') | |
| gamebox.addKnob(p1s) | |
| gamebox.addKnob(p2s) | |
| gamebox['tile_color'].setValue(1) | |
| ball = nuke.toNode("ball") | |
| if ball is None: | |
| ball = nuke.nodes.Dot() | |
| # Make paddles | |
| player1, player2 = nuke.toNode("player1"), nuke.toNode("player2") | |
| if player1 is None: | |
| player1 = nuke.nodes.BackdropNode(bdwidth = 40, bdheight = 100, name = "player1") | |
| player1.setXpos(gamebox.xpos()) | |
| if player2 is None: | |
| player2 = nuke.nodes.BackdropNode(bdwidth = 40, bdheight = 100, name = "player2") | |
| player2.setXpos( | |
| (gamebox.xpos() + (gamebox.screenWidth() - 40))) | |
| global pong | |
| pong = Game( | |
| gamebox = gamebox, | |
| ball = ball, | |
| player1 = player1, | |
| player2 = player2) | |
| pong.start() | |
| def main(): | |
| mn = nuke.menu("Nodes") | |
| mp = mn.addMenu("Pong") | |
| mp.addCommand( | |
| "start pong", | |
| lambda: start_pong(), | |
| "alt+p") | |
| mp.addCommand("stop pong", | |
| lambda: stop_pong(), | |
| "alt+q") | |
| mp.addSeparator() | |
| mp.addCommand("p1 - up", | |
| lambda: nudge_up(left=True), | |
| "Up") | |
| mp.addCommand("p1 - up large", | |
| lambda: nudge_up(left=True, large=True), | |
| "Shift+Up") | |
| mp.addCommand("p1 - down", | |
| lambda: nudge_down(left=True), | |
| "Down") | |
| mp.addCommand("p1 - down large", | |
| lambda: nudge_down(left=True, large=True), | |
| "Shift+Down") | |
| mp.addSeparator() | |
| mp.addCommand("p2 - up", | |
| lambda: nudge_up(right=True), | |
| "w") | |
| mp.addCommand("p2 - up large", | |
| lambda: nudge_up(right=True, large=True), | |
| "Shift+w") | |
| mp.addCommand("p2 - down", | |
| lambda: nudge_down(right=True), | |
| "s") | |
| mp.addCommand("p2 - down large", | |
| lambda: nudge_down(right=True, large=True), | |
| "Shift+s") | |
| if __name__ == '__main__': | |
| main() |
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