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Texture UVs for surface to follow data dimension 

Change texture UVs to be generated according to data dimension. Also
utilise this change on texturesurface example.

Change-Id: Ideacfba409dc2e7cf579fb38d897e08c9f9a1b71
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>
This commit is contained in:
Mika Salmela 2014-10-07 00:04:03 +03:00
parent 0e5b7fba37
commit aab6b4f77d
3 changed files with 19 additions and 5 deletions
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5
examples/datavisualization/texturesurface/topographicseries.cpp
View File

@ -49,7 +49,8 @@ void TopographicSeries::setTopographyFile(const QString file, float width, float
QSurfaceDataArray *dataArray = new QSurfaceDataArray;
dataArray->reserve(imageHeight);
for (int i = 0; i < imageHeight; i++) {
int p = (imageHeight - 1 - i) * widthBits;
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];
@ -57,7 +58,7 @@ void TopographicSeries::setTopographyFile(const QString file, float width, float
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, float(i) * stepZ));
(*newRow)[j].setPosition(QVector3D(float(j) * stepX, y, z));
p = p + 4;
}
*dataArray << newRow;

12
src/datavisualization/utils/surfaceobject.cpp
View File

@ -307,15 +307,21 @@ void SurfaceObject::smoothUVs(const QSurfaceDataArray &dataArray,
float zRangeNormalizer = dataArray.at(rows - 1)->at(0).z() - dataArray.at(0)->at(0).z();
float xMin = dataArray.at(0)->at(0).x();
float zMin = dataArray.at(0)->at(0).z();
const bool zDescending = m_dataDimension.testFlag(SurfaceObject::ZDescending);
const bool xDescending = m_dataDimension.testFlag(SurfaceObject::XDescending);
QVector<QVector2D> uvs;
uvs.resize(m_rows * m_columns);
int index = 0;
for (int i = 0; i < m_rows; i++) {
float y = (modelArray.at(i)->at(0).z() - zMin) / zRangeNormalizer;
if (zDescending)
y = 1.0f - y;
const QSurfaceDataRow &p = *modelArray.at(i);
for (int j = 0; j < m_columns; j++) {
float x = (p.at(j).x() - xMin) / xRangeNormalizer;
if (xDescending)
x = 1.0f - x;
uvs[index] = QVector2D(x, y);
index++;
}
@ -601,6 +607,8 @@ void SurfaceObject::coarseUVs(const QSurfaceDataArray &dataArray,
float zRangeNormalizer = dataArray.at(rows - 1)->at(0).z() - dataArray.at(0)->at(0).z();
float xMin = dataArray.at(0)->at(0).x();
float zMin = dataArray.at(0)->at(0).z();
const bool zDescending = m_dataDimension.testFlag(SurfaceObject::ZDescending);
const bool xDescending = m_dataDimension.testFlag(SurfaceObject::XDescending);
QVector<QVector2D> uvs;
uvs.resize(m_rows * m_columns * 2);
@ -608,9 +616,13 @@ void SurfaceObject::coarseUVs(const QSurfaceDataArray &dataArray,
int colLimit = m_columns - 1;
for (int i = 0; i < m_rows; i++) {
float y = (modelArray.at(i)->at(0).z() - zMin) / zRangeNormalizer;
if (zDescending)
y = 1.0f - y;
const QSurfaceDataRow &p = *modelArray.at(i);
for (int j = 0; j < m_columns; j++) {
float x = (p.at(j).x() - xMin) / xRangeNormalizer;
if (xDescending)
x = 1.0f - x;
uvs[index] = QVector2D(x, y);
index++;
if (j > 0 && j < colLimit) {

7
src/datavisualization/utils/surfaceobject_p.h
View File

@ -49,12 +49,13 @@ public:
Undefined
};
enum DataDimensions {
enum DataDimension {
BothAscending = 0,
XDescending = 1,
ZDescending = 2,
BothDescending = XDescending | ZDescending
};
Q_DECLARE_FLAGS(DataDimensions, DataDimension)
public:
SurfaceObject(Surface3DRenderer *renderer);
@ -115,8 +116,8 @@ private:
float m_maxY;
GLuint m_uvTextureBuffer;
bool m_returnTextureBuffer;
int m_dataDimension;
int m_oldDataDimension;
SurfaceObject::DataDimensions m_dataDimension;
SurfaceObject::DataDimensions m_oldDataDimension;
};
QT_END_NAMESPACE_DATAVISUALIZATION