Created
May 28, 2011 15:32
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first draft of a sample program (the game Safari!) in a Totem-like language
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| ### | |
| Systems | |
| ### | |
| system "World", | |
| state: | |
| worldWidth: 800 | |
| worldHeight: 600 | |
| initial: (self) -> | |
| spawn "Hunter", name: "Player 1", keys: "wsadc" | |
| spawn "Hunter", name: "Player 2", keys: "ikjln" | |
| for [1..10] -> | |
| spawn "Dodo", x: Math.random() * self.get("worldWidth"), y: Math.random() * self.get("worldHeight") | |
| system "Sprite", | |
| state: | |
| x: 0 | |
| y: 0 | |
| system "Mover", | |
| extends: "Sprite" | |
| state: | |
| angle: 0 | |
| velocity: 0 | |
| angleVelocity: 0 | |
| system "Fleeting", | |
| state: | |
| timeAlive: 1000 | |
| system "Hunter", | |
| extends: "Mover" | |
| state: | |
| name: "" | |
| keys: "" | |
| speed: 3 | |
| angleSpeed: 2 | |
| system "Bullet", | |
| extends: ["Mover", "Fleeting"] | |
| state: | |
| timeAlive: 1000 | |
| shooter: null | |
| velocity: 10 | |
| system "Dodo", | |
| extends: "Sprite" | |
| state: | |
| radius: 10 | |
| system "DeadDodo", | |
| extends: ["Sprite", "Fleeting"] | |
| state: | |
| timeAlive: 400 | |
| ### | |
| Interactions | |
| pre-supposes systems: | |
| Time, which triggers a tick(dt) event as often as it can | |
| Keyboard, which triggers keyDown(char) and keyUp(char) events | |
| ### | |
| # move Movers based on their velocity | |
| interact "Time", "Mover", (time, mover) -> | |
| time.tick.listen (dt) -> | |
| mover.set({ | |
| x: mover.get("x") + mover.get("velocity") * Math.cos(mover.get("angle")) * dt | |
| y: mover.get("y") + mover.get("velocity") * Math.sin(mover.get("angle")) * dt | |
| angle: mover.get("angle") + mover.get("angleVelocity") * dt | |
| }) | |
| # change the velocity of Hunter based on keyboard presses, also fire Bullets | |
| interact "Keyboard", "Hunter", (keyboard, hunter) -> | |
| keyboard.keyDown (char) -> | |
| switch char | |
| when hunter.get("keys").charAt(0) | |
| hunter.set(velocity: hunter.get("speed")) | |
| when hunter.get("keys").charAt(1) | |
| hunter.set(velocity: -hunter.get("speed")) | |
| when hunter.get("keys").charAt(2) | |
| hunter.set(angleVelocity: -hunter.get("angleSpeed")) | |
| when hunter.get("keys").charAt(3) | |
| hunter.set(angleVelocity: hunter.get("angleSpeed")) | |
| when hunter.get("keys").charAt(4) | |
| spawn "Bullet", shooter: hunter, x: hunter.get("x"), y: hunter.get("y"), angle: hunter.get("angle") | |
| keyboard.keyUp (char) -> | |
| switch char | |
| when hunter.get("keys").charAt(0), hunter.get("keys").charAt(1) | |
| hunter.set(velocity: 0) | |
| when hunter.get("keys").charAt(2), hunter.get("keys").charAt(3) | |
| hunter.set(angleVelocity: 0) | |
| # destroy Bullets and Dodos when they're within Dodo's radius | |
| interact "Bullet", "Dodo", (bullet, dodo) -> | |
| bullet.listen "x", "y", (x, y) -> | |
| if Math.pow(x - dodo.get("x"), 2) + Math.pow(y - dodo.get("y"), 2) < Math.pow(dodo.get("radius"), 2) | |
| dodo.transition("DeadDodo") | |
| bullet.destroy() | |
| # destroy Fleeting if it's been around too long | |
| interact "Time", "Fleeting", (time, fleeting) -> | |
| time.tick.listen (dt) -> | |
| fleeting.set(timeAlive: fleeting.get("timeAlive") - dt) | |
| if (fleeting.get("timeAlive") <= 0) | |
| fleeting.destroy() | |
| ### | |
| TODO: | |
| make a win condition when the last Dodo is killed | |
| add multiple clients | |
| transition the world based on when games have started | |
| ### | |
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