mirror of https://github.com/axmolengine/axmol.git
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
#include "Ball.h"
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#include "Paddle.h"
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#include "../VisibleRect.h"
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Ball::Ball(void)
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{
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}
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Ball::~Ball(void)
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{
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}
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float Ball::radius()
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{
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return getTexture()->getContentSize().width / 2;
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}
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Ball* Ball::ballWithTexture(Texture2D* aTexture)
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{
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Ball* pBall = new Ball();
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pBall->initWithTexture(aTexture);
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pBall->autorelease();
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return pBall;
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}
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void Ball::move(float delta)
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{
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this->setPosition( ccpAdd(getPosition(), ccpMult(_velocity, delta)) );
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if (getPosition().x > VisibleRect::right().x - radius())
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{
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setPosition( ccp( VisibleRect::right().x - radius(), getPosition().y) );
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_velocity.x *= -1;
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}
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else if (getPosition().x < VisibleRect::left().x + radius())
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{
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setPosition( ccp(VisibleRect::left().x + radius(), getPosition().y) );
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_velocity.x *= -1;
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}
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}
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void Ball::collideWithPaddle(Paddle* paddle)
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{
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Rect paddleRect = paddle->rect();
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paddleRect.origin.x += paddle->getPosition().x;
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paddleRect.origin.y += paddle->getPosition().y;
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float lowY = paddleRect.getMinY();
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float midY = paddleRect.getMidY();
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float highY = paddleRect.getMaxY();
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float leftX = paddleRect.getMinX();
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float rightX = paddleRect.getMaxX();
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if (getPosition().x > leftX && getPosition().x < rightX) {
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bool hit = false;
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float angleOffset = 0.0f;
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if (getPosition().y > midY && getPosition().y <= highY + radius())
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{
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setPosition( ccp(getPosition().x, highY + radius()) );
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hit = true;
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angleOffset = (float)M_PI / 2;
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}
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else if (getPosition().y < midY && getPosition().y >= lowY - radius())
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{
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setPosition( ccp(getPosition().x, lowY - radius()) );
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hit = true;
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angleOffset = -(float)M_PI / 2;
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}
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if (hit)
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{
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float hitAngle = ccpToAngle(ccpSub(paddle->getPosition(), getPosition())) + angleOffset;
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float scalarVelocity = ccpLength(_velocity) * 1.05f;
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float velocityAngle = -ccpToAngle(_velocity) + 0.5f * hitAngle;
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_velocity = ccpMult(ccpForAngle(velocityAngle), scalarVelocity);
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}
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}
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}
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