script.txt

Slides
- At slide 12, show tests
- At slide 14, show people around the webpage & Github


1) setup
- copy graphical assets
- add resize, pause, resume to PlaneGame, remove texture
- setup 800x480 desktop window, and resizable
- make all other projects landscape as well

2) loading graphical assets
- load background and draw
- show resolution issue,  use 960x480 in desktop
- setup camera -> always use 800x480
- add ground, draw it
- add ceiling, explain textureRegion, draw it
- add plane animation, explain it, draw it with stateTime (50, 240)
- explain Gdx.XXX

3) gravity and touch
- add update() and draw() methods -> clean up
- add plane position (50, 240) and velocity vector, gravity vector (0, -20), mention euler integration and that the values are just guessed
- add planeStateTime update to updateWorld
- add planeVelocity.add(gravity) to updateWorld
- add planePosition.mulAdd(planeVelocity, deltaTime) to updateWorld
- draw planePosition
- add justTouched with planeVelocity.set(0, 350) to updateWorld

4) plane movement
- modify planeVelocity initialisation in create(), use 40, 0 so plane moves, and modify the setter in updateWorld
- tell folks that it's time to use constants! change gravity, start position, start velocity and jump velocity!

5) camera & parallax movement
- let camera follow plane on x axis with offset of 350px
- fix background to camera position by drawing at camera.position.x - background.getWidth() / 2
- add groundOffsetX, draw ground/ceiling twice at groundOffsetX and groundOffsetX + ground.getWidth()
- add check so offset gets reset
		if(camera.position.x - groundOffsetX > ground.getWidth() + 400) {
			groundOffsetX += ground.getWidth();
		}
- flip ceiling on x as well!

6) Add rocks
- load rock images
- create a class rock, position and region
- add an Array<Rock> and draw it before the ground/ceiling
- add 5 rocks, starting at 700, every 160px
		for(int i = 0; i < 5; i++) {
			boolean isDown = MathUtils.randomBoolean();
			rocks.add(new Rock(700 + i * 200, isDown?480-rock.getRegionHeight(): 0, isDown? rockDown: rock));
		}
- show result, explain how we reset the rocks that go outside the visible range

7) Collision
- add game state enum Start, Running, GameOver and corresponding field (set to running)
- add collision with ground and ceiling by checking position.y against constants, set game over state, set x velocity to 0
		if(planePosition.y < ground.getRegionHeight() - 20 || 
			planePosition.y + plane.getKeyFrames()[0].getRegionHeight() > 480 - ground.getRegionHeight() + 20) {
			gameState = GameState.GameOver;
			planeVelocity.x = 0;
		}	
- modify touch test to check if game is over, the game needs to be hard reset now to work!
- add collision detection between plane and rocks using rectangles, say that allocating rects is bad
		rect1.set(planePosition.x, planePosition.y, plane.getKeyFrames()[0].getRegionWidth(), plane.getKeyFrames()[0].getRegionHeight());
		for(Rock r: rocks) {
			if(camera.position.x - r.position.x > 400 + r.image.getRegionWidth()) {
				boolean isDown = MathUtils.randomBoolean();
				r.position.x += 5 * 200;
				r.position.y = isDown?480-rock.getRegionHeight(): 0;
				r.image = isDown? rockDown: rock;
			}
			rect2.set(r.position.x + (r.image.getRegionWidth() - 30) / 2, r.position.y, 30, r.image.getRegionHeight());position.y, 30, r.image.getRegionHeight());
			if(rect1.overlaps(rect2)) {
				gameState = GameState.GameOver;
				planeVelocity.x = 0;
			}
		}
- doesn't work! Let's use ShapeRenderer to see what's up
		shapeRenderer.setProjectionMatrix(camera.combined);
		shapeRenderer.begin(ShapeType.Line);
		rect1.set(planePosition.x, planePosition.y, plane.getKeyFrames()[0].getRegionWidth(), plane.getKeyFrames()[0].getRegionHeight());
		shapeRenderer.rect(rect1.x, rect1.y, rect1.width, rect1.height);
		for(Rock r: rocks) {
			rect2.set(r.position.x + (r.image.getRegionWidth() - 30) / 2, r.position.y, 30, r.image.getRegionHeight());
			shapeRenderer.rect(rect2.x, rect2.y, rect2.width, rect2.height);
		}		
		shapeRenderer.end();

8) Fix Collision, game states
- modify bounding rectangle of both plane (shorter at the end) and rock (smaller 20 and offset to the right by 10)
- load ready and gameover pngs
- create resetWorld method, reset rocks, camera, plane, groundOffset
- let gravity only apply if gamestate is not starting
- rework touch check
		if(Gdx.input.justTouched()) {
			if(gameState == GameState.Start) {
				gameState = GameState.Running;
			}
			if(gameState == GameState.Running) {
				planeVelocity.set(PLANE_VELOCITY_X, PLANE_JUMP_IMPULSE);
			}
			if(gameState == GameState.GameOver) {
				gameState = GameState.Start;
				resetWorld();
			}
		}
- render overlays
		if(gameState == GameState.Start) {
			batch.draw(ready, 400 - ready.getRegionWidth() / 2, 240 - ready.getRegionHeight() / 2);
		}
		if(gameState == GameState.GameOver) {
			batch.draw(ready, 400 - ready.getRegionWidth() / 2, 240 - ready.getRegionHeight() / 2);
		}

9) Show score
- Add UI Camera, do rendering of ready, gameover with uicamera
- Add Bitmapfont
- load font, add score field, add rendering
		if(gameState == GameState.GameOver || gameState == GameState.Running) {
			font.draw(batch, "" + score, Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() - 60);
		}
- count rocks