OpenFramework中视频或者图片进行中心旋转、平移、放大、缩小、矫正（本例以视频为准，只给出主要代码）

/********** update mesh部分***********/

for(int i=0;i<4;i++)

{

mesh[i].clear(); //重要，不加的话，移动视频的四个角出现视频的重叠

mesh[i].addVertex(ofPoint(point[i][0]->x,point[i][0]->y));

mesh[i].addVertex(ofPoint(point[i][1]->x,point[i][1]->y));

mesh[i].addVertex(ofPoint(point[i][2]->x,point[i][2]->y));

mesh[i].addTexCoord(ofPoint(0,0));

mesh[i].addTexCoord(ofPoint(LRatio,0));

mesh[i].addTexCoord(ofPoint(0,WRatio));

mesh[i].addVertex(ofPoint(point[i][1]->x,point[i][1]->y));

mesh[i].addVertex(ofPoint(point[i][2]->x,point[i][2]->y));

mesh[i].addVertex(ofPoint(point[i][3]->x,point[i][3]->y));

mesh[i].addTexCoord(ofPoint(LRatio,0));

mesh[i].addTexCoord(ofPoint(0,WRatio));

mesh[i].addTexCoord(ofPoint(LRatio,WRatio));

}

/********** draw（）部分***********/

ofBackground(ofColor::black); //背景设成黑色，需要投影播放

ofSetColor(ofColor::white);

fbo.begin();//////////整体渲染的开始

ofPushMatrix();

ofClear(255); //重要，消除移动时留下重影

ofTranslate(ofGetWindowWidth()*0.5,ofGetWindowHeight()*0.5);

ofRotate(holisticRotate); //整体的旋转

ofScale(holisticScale->x,holisticScale->y); //整体的放大缩小

ofTranslate(holisticPos->x,holisticPos->y); //整体的上下左右移动

for (int i=0;i<4;i++) //分别对四个视频进行相关的操作

{

ofPushMatrix();

ofTranslate(m_video[i].width/2,m_video[i].height/2);

ofRotate(rotatePos[i]);    //360度旋转

ofScale(scalePos[i]->x,scalePos[i]->y); //上下左右反转

ofTranslate(m_videoPos[i]->x,m_videoPos[i]->y);

m_video[i].bind(); //绑定视频

mesh[i].draw();

m_video[i].unbind(); //解除绑定

//mesh[i].drawWireframe(); //画边线，不去除在视频中会出现对角线

ofPopMatrix();

}

ofPopMatrix();

fbo.end();//////////整体渲染的结束

fbo.getTexture().bind();

_mesh.draw();

fbo.getTexture().unbind();

_mesh.clear(); //重要，消除整体移动时的重影