void GraphicObject::createVBOs()
{
destroyVBOs();
vao = new QOpenGLVertexArrayObject(widget);
vao->create();
vao->bind();
vboVertices = new QOpenGLBuffer( QOpenGLBuffer::VertexBuffer );
vboVertices->create();
vboVertices->setUsagePattern( QOpenGLBuffer::StaticDraw );
vboVertices->bind();
sProgram->enableAttributeArray("vertex");
sProgram->setAttributeArray("vertex", GL_FLOAT, 0, 4, 0);
vboVertices->allocate( vertices, vnum * sizeof(QVector4D) );
vboIndices = new QOpenGLBuffer( QOpenGLBuffer::IndexBuffer );
vboIndices->create();
vboIndices->setUsagePattern( QOpenGLBuffer::StaticDraw );
vboIndices->bind();
vboIndices->allocate( indices, inum * sizeof(unsigned int) );
vboNormals = new QOpenGLBuffer( QOpenGLBuffer::VertexBuffer );
vboNormals->create();
vboNormals->setUsagePattern( QOpenGLBuffer::StaticDraw );
vboNormals->bind();
vboNormals->allocate( normals, vnum * sizeof(QVector3D) );
sProgram->enableAttributeArray("normal");
sProgram->setAttributeArray("normal", GL_FLOAT, 0, 3, 0);
}
void OpenGLWidget::createVBOs(){
destroyVBOs();//destroy previous (GPU allocated) VBOs
//define coordinate texture=========================================
QVector2D *qVector2DTextureCoordinate=new QVector2D[4];
qVector2DTextureCoordinate[3]= QVector2D(0,0);
qVector2DTextureCoordinate[2]=QVector2D(1,0);
qVector2DTextureCoordinate[1]=QVector2D(1,1);
qVector2DTextureCoordinate[0]=QVector2D(0,1);
//end===============================================================
//transfer coordenate texture to gpu===============================
vboTextureCoordinate = new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
vboTextureCoordinate->create();
vboTextureCoordinate->bind();
vboTextureCoordinate->setUsagePattern(QOpenGLBuffer::StaticDraw);
vboTextureCoordinate->allocate(qVector2DTextureCoordinate , 4*sizeof(QVector2D));
//end===============================================================
//define face to form one square====================================
unsigned int *indices = new unsigned int[2*3];
indices[0]=0; indices[1]=1; indices[2]=2;
indices[3]=2; indices[4]=3; indices[5]=0;
//end===============================================================
//transfer face to gpu==============================================
vboIndices =new QOpenGLBuffer(QOpenGLBuffer::IndexBuffer);
vboIndices ->create();
vboIndices ->bind();
vboIndices ->setUsagePattern(QOpenGLBuffer::StaticDraw);
vboIndices ->allocate(indices , 2 * 3 *sizeof(unsigned int));
//end===============================================================
delete [] indices;
delete qVector2DTextureCoordinate;
}
GraphicObject::~GraphicObject()
{
delete [] indices;
indices = NULL;
delete vertices;
vertices = NULL;
delete color;
color = NULL;
delete vertexShader;
vertexShader = NULL;
delete fragmentShader;
fragmentShader = NULL;
if( sProgram ) {
sProgram->release();
delete sProgram;
sProgram = NULL;
}
if( vertexShader ) {
delete vertexShader;
vertexShader = NULL;
}
if( fragmentShader ) {
delete fragmentShader;
fragmentShader = NULL;
}
destroyVBOs();
}
OpenGLWidget::~OpenGLWidget(){
destroyVBOs();
destroyShaders();
if(imgOrig) delete imgOrig;
}
