cocos2dx day 2 - Sprites

1.Sprite

对sprite设置anchor point，对应的位置

// DEFAULT anchor point for all Sprites
mySprite->setAnchorPoint(0.5, 0.5);

// bottom left
mySprite->setAnchorPoint(0, 0);

// top left
mySprite->setAnchorPoint(0, 1);

// bottom right
mySprite->setAnchorPoint(1, 0);

// top right
mySprite->setAnchorPoint(1, 1);

2.Actions - By and To, what is the difference?

A By is relative to the current state of the Node. A To action is absolute, meaning it doesn't take into account the current state of the Node

auto mySprite = Sprite::create("mysprite.png");
mySprite->setPosition(Vec2(200, 256));

// MoveBy - lets move the sprite by 500 on the x axis over 2 seconds
// MoveBy is relative - since x = 200 + 200 move = x is now 400 after the move
auto moveBy = MoveBy::create(2, Vec2(500, mySprite->getPositionY()));

// MoveTo - lets move the new sprite to 300 x 256 over 2 seconds
// MoveTo is absolute - The sprite gets moved to 300 x 256 regardless of
// where it is located now.
auto moveTo = MoveTo::create(2, Vec2(300, mySprite->getPositionY()));

auto seq = Sequence::create(moveBy, delay, moveTo, nullptr);

mySprite->runAction(seq);

2.1 Move

auto mySprite = Sprite::create("mysprite.png");

// Move a sprite to a specific location over 2 seconds.
auto moveTo = MoveTo::create(2, Vec2(50, 0));

mySprite->runAction(moveTo);

// Move a sprite 50 pixels to the right, and 0 pixels to the top over 2 seconds.
auto moveBy = MoveBy::create(2, Vec2(50, 0));

mySprite->runAction(moveBy);

 

2.2 Rotate

auto mySprite = Sprite::create("mysprite.png");

// Rotates a Node to the specific angle over 2 seconds
auto rotateTo = RotateTo::create(2.0f, 40.0f);
mySprite->runAction(rotateTo);

// Rotates a Node clockwise by 40 degree over 2 seconds
auto rotateBy = RotateBy::create(2.0f, 40.0f);
mySprite->runAction(rotateBy);

2.3 Scale

auto mySprite = Sprite::create("mysprite.png");

// Scale uniformly by 3x over 2 seconds
auto scaleBy = ScaleBy::create(2.0f, 3.0f);
mySprite->runAction(scaleBy);

// Scale X by 5 and Y by 3x over 2 seconds
auto scaleBy = ScaleBy::create(2.0f, 3.0f, 3.0f);
mySprite->runAction(scaleBy);

// Scale to uniformly to 3x over 2 seconds
auto scaleTo = ScaleTo::create(2.0f, 3.0f);
mySprite->runAction(scaleTo);

// Scale X to 5 and Y to 3x over 2 seconds
auto scaleTo = ScaleTo::create(2.0f, 3.0f, 3.0f);
mySprite->runAction(scaleTo);

2.4 Fade In/Out

auto mySprite = Sprite::create("mysprite.png");

// fades in the sprite in 1 seconds
auto fadeIn = FadeIn::create(1.0f);
mySprite->runAction(fadeIn);

// fades out the sprite in 2 seconds
auto fadeOut = FadeOut::create(2.0f);
mySprite->runAction(fadeOut);

2.5 Tint

auto mySprite = Sprite::create("mysprite.png");

// Tints a node to the specified RGB values
auto tintTo = TintTo::create(2.0f, 120.0f, 232.0f, 254.0f);
mySprite->runAction(tintTo);

// Tints a node BY the delta of the specified RGB values.
auto tintBy = TintBy::create(2.0f, 120.0f, 232.0f, 254.0f);
mySprite->runAction(tintBy);