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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
#ifdef QUICK3D_MODULE
#include "gridgeometry.h"
namespace QmlDesigner {
namespace Internal {
GridGeometry::GridGeometry()
: GeometryBase()
{
updateGeometry();
}
GridGeometry::~GridGeometry()
{
}
int GridGeometry::lines() const
{
return m_lines;
}
float GridGeometry::step() const
{
return m_step;
}
bool GridGeometry::isCenterLine() const
{
return m_isCenterLine;
}
// Number of lines on each side of the center lines.
// These lines are not drawn if m_isCenterLine is true; lines and step are simply used to calculate
// the length of the center line in that case.
void GridGeometry::setLines(int count)
{
count = qMax(count, 1);
if (m_lines == count)
return;
m_lines = qMax(count, 1);
emit linesChanged();
updateGeometry();
}
// Space between lines
void GridGeometry::setStep(float step)
{
step = qMax(step, 0.0f);
if (qFuzzyCompare(m_step, step))
return;
m_step = step;
emit stepChanged();
updateGeometry();
}
void GridGeometry::setIsCenterLine(bool enabled)
{
if (m_isCenterLine == enabled)
return;
m_isCenterLine = enabled;
emit isCenterLineChanged();
updateGeometry();
}
void GridGeometry::doUpdateGeometry()
{
GeometryBase::doUpdateGeometry();
QByteArray vertexData;
fillVertexData(vertexData);
setVertexData(vertexData);
int lastIndex = (vertexData.size() - 1) / int(sizeof(QVector3D));
auto vertexPtr = reinterpret_cast<QVector3D *>(vertexData.data());
setBounds(QVector3D(vertexPtr[0][0], vertexPtr[0][1], 0.0),
QVector3D(vertexPtr[lastIndex][0], vertexPtr[lastIndex][1], 0.0));
}
void GridGeometry::fillVertexData(QByteArray &vertexData)
{
const int numSubdivs = 1; // number of subdivision lines (i.e. lines between main grid lines)
const int vtxSize = int(sizeof(float)) * 3 * 2;
const int size = m_isCenterLine ? vtxSize
: m_isSubdivision ? 4 * m_lines * vtxSize * numSubdivs
: 4 * m_lines * vtxSize;
vertexData.resize(size);
float *dataPtr = reinterpret_cast<float *>(vertexData.data());
float x0 = -float(m_lines) * m_step;
float y0 = x0;
float x1 = -x0;
float y1 = x1;
if (m_isCenterLine) {
// start position
dataPtr[0] = 0.f;
dataPtr[1] = y0;
dataPtr[2] = 0.f;
// end position
dataPtr[3] = 0.f;
dataPtr[4] = y1;
dataPtr[5] = 0.f;
} else {
// Lines are created so that bounding box can later be calculated from first and last vertex
if (m_isSubdivision) {
const float subdivStep = m_step / float(numSubdivs + 1);
const int subdivMainLines = m_lines * 2;
auto generateSubLines = [&](float x0, float y0, float x1, float y1, bool vertical) {
for (int i = 0; i < subdivMainLines; ++i) {
for (int j = 1; j <= numSubdivs; ++j) {
// start position
dataPtr[0] = vertical ? x0 + i * m_step + j * subdivStep : x0;
dataPtr[1] = vertical ? y0 : y0 + i * m_step + j * subdivStep;
dataPtr[2] = .0f;
// end position
dataPtr[3] = vertical ? x0 + i * m_step + j * subdivStep : x1;
dataPtr[4] = vertical ? y1 : y0 + i * m_step + j * subdivStep;
dataPtr[5] = .0f;
dataPtr += 6;
}
}
};
generateSubLines(x0, y0, x1, y1, true);
generateSubLines(x0, y0, x1, y1, false);
} else {
auto generateLines = [this, &dataPtr](float x0, float y0, float x1, float y1, bool vertical) {
for (int i = 0; i < m_lines; ++i) {
// start position
dataPtr[0] = vertical ? x0 + i * m_step : x0;
dataPtr[1] = vertical ? y0 : y0 + i * m_step;
dataPtr[2] = .0f;
// end position
dataPtr[3] = vertical ? x0 + i * m_step : x1;
dataPtr[4] = vertical ? y1 : y0 + i * m_step;
dataPtr[5] = .0f;
dataPtr += 6;
}
};
generateLines(x0, y0, x1, y1, true);
generateLines(x0, y0, x1, y1, false);
generateLines(x0, m_step, x1, y1, false);
generateLines(m_step, y0, x1, y1, true);
}
}
}
}
}
#endif // QUICK3D_MODULE
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