Textured Surface Example

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#include "topographicseries.h" using namespace QtDataVisualization; // Value used to encode height data as RGB value on PNG file const float packingFactor = 11983.0f; TopographicSeries::TopographicSeries() { setDrawMode(QSurface3DSeries::DrawSurface); setFlatShadingEnabled(true); setBaseColor(Qt::white); } TopographicSeries::~TopographicSeries() { } void TopographicSeries::setTopographyFile(const QString file, float width, float height) { QImage heightMapImage(file); uchar *bits = heightMapImage.bits(); int imageHeight = heightMapImage.height(); int imageWidth = heightMapImage.width(); int widthBits = imageWidth * 4; float stepX = width / float(imageWidth); float stepZ = height / float(imageHeight); QSurfaceDataArray *dataArray = new QSurfaceDataArray; dataArray->reserve(imageHeight); for (int i = 0; i < imageHeight; i++) { int p = i * widthBits; float z = height - float(i) * stepZ; QSurfaceDataRow *newRow = new QSurfaceDataRow(imageWidth); for (int j = 0; j < imageWidth; j++) { uchar aa = bits[p + 0]; uchar rr = bits[p + 1]; uchar gg = bits[p + 2]; uint color = uint((gg << 16) + (rr << 8) + aa); float y = float(color) / packingFactor; (*newRow)[j].setPosition(QVector3D(float(j) * stepX, y, z)); p = p + 4; } *dataArray << newRow; } dataProxy()->resetArray(dataArray); m_sampleCountX = float(imageWidth); m_sampleCountZ = float(imageHeight); }