mirror of https://github.com/axmolengine/axmol.git
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
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#include "RenderTextureTest.h"
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RenderTextureTest::RenderTextureTest()
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{
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CGSize s = CCDirector::getSharedDirector()->getWinSize();
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CCLabel* label = CCLabel::labelWithString("Render Texture Test", "Arial", 28);
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addChild(label, 0);
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label->setPosition( ccp(s.width/2, s.height-50) );
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// create a render texture, this is what we're going to draw into
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m_target = CCRenderTexture::renderTextureWithWidthAndHeight(s.width, s.height);
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m_target->setPosition(ccp(s.width/2, s.height/2));
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// note that the render texture is a cocosnode, and contains a sprite of it's texture for convience,
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// so we can just parent it to the scene like any other cocos node
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addChild(m_target, 1);
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// create a brush image to draw into the texture with
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m_brush = CCSprite::spriteWithFile("Images/stars.png");
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m_brush->retain();
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ccBlendFunc bf = { GL_ONE, GL_ONE_MINUS_SRC_ALPHA };
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m_brush->setBlendFunc( bf);
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m_brush->setOpacity(20);
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setIsTouchEnabled(true);
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}
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RenderTextureTest::~RenderTextureTest()
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{
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m_brush->release();
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}
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void RenderTextureTest::ccTouchesMoved(NSSet* touches, UIEvent* event)
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{
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NSSetIterator it = touches->begin();
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CCTouch* touch = (CCTouch*)(*it);
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CGPoint start = touch->locationInView( touch->view() );
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start = CCDirector::getSharedDirector()->convertToGL( start );
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CGPoint end = touch->previousLocationInView( touch->view() );
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end = CCDirector::getSharedDirector()->convertToGL(end);
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// begin drawing to the render texture
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m_target->begin();
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// for extra points, we'll draw this smoothly from the last position and vary the sprite's
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// scale/rotation/offset
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float distance = ccpDistance(start, end);
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if (distance > 1)
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{
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int d = (int)distance;
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for (int i = 0; i < d; i++)
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{
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float difx = end.x - start.x;
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float dify = end.y - start.y;
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float delta = (float)i / distance;
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m_brush->setPosition(ccp(start.x + (difx * delta), start.y + (dify * delta)) );
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m_brush->setRotation( rand()%360 );
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float r = ((float)(rand()%50)/50.f) + 0.25f;
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m_brush->setScale( r );
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// Call visit to draw the brush, don't call draw..
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m_brush->visit();
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}
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}
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// finish drawing and return context back to the screen
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m_target->end();
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}
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void RenderTextureScene::runThisTest()
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{
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CCLayer* pLayer = new RenderTextureTest();
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addChild(pLayer);
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CCDirector::getSharedDirector()->replaceScene(this);
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pLayer->release();
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}
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