//********************************************
// SetAlpha
// From RGB to grey scales, then alpha layer
//********************************************
int Texture::SetAlphaLayer(Texture *pTexture)
{
// Check
if(!IsValid())
return 0;
if(!pTexture->IsValid())
return 0;
if(!SameSize(pTexture))
return 0;
if(!AddAlphaLayer(0))
return 0;
// Fill new data
unsigned char *pData = pTexture->GetData();
int size = m_Width * m_Height;
int BytePerPixel = pTexture->GetDepth() / 8;
for(int i=0;i<size;i++)
m_pData[4*i+3] = (unsigned char)((int)pData[BytePerPixel*i+0]+
(int)pData[BytePerPixel*i+1]+
(int)pData[BytePerPixel*i+2])/3;
return 1;
}
void MainWindow::on_generateButton_clicked()
{
//Ensure all images are the same size
if(!SameSize(topImage, rightImage, leftImage, bottomImage))
{
QMessageBox msgBox;
msgBox.setText("Images are not the same size!");
msgBox.exec();
return;
}
int normalMapSize = topImage.size().width()*topImage.size().height();
normals = new QVector3D[normalMapSize];
for(int i = 0; i < normalMapSize; i++)
{
//Point all vectors -z
normals[i].setZ(-1.0);
normals[i].setY(0);
normals[i].setX(0);
}
ProcessNormals(topImage, IMAGE::TOP);
ProcessNormals(rightImage, IMAGE::RIGHT);
ProcessNormals(bottomImage, IMAGE::BOTTOM);
ProcessNormals(leftImage, IMAGE::LEFT);
resultImage = QImage(topImage.width(), topImage.height(), QImage::Format_RGB32);
for(int i = 0; i < normalMapSize; i++)
{
normals[i].normalize();
QColor normColor;
normColor.setRgbF((normals[i].x()+1.0)/2.0,
(normals[i].y()+1.0)/2.0,
(-normals[i].z()+1.0)/2.0);
int yCoord = i / topImage.width();
int xCoord = i % topImage.width();
resultImage.setPixel(QPoint(xCoord, yCoord), normColor.rgb());
}
resultScene->addPixmap(QPixmap::fromImage(resultImage.scaled(QSize(100, 100))));
ui->resultView->show();
ui->oglWidget->SetNormalMap(resultImage);
}
