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GLScope: rainbow palette for Y1 on polar displays

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This commit is contained in:
f4exb
2019-10-15 01:24:36 +02:00
parent 198de8d139
commit 97dc714d4e
5 changed files with 235 additions and 5 deletions
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sdrgui/gui/glscope.cpp
+37 -5
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@@ -192,6 +192,7 @@ void GLScope::initializeGL()
//glDisable(GL_DEPTH_TEST);
m_glShaderSimple.initializeGL();
m_glShaderColors.initializeGL();
m_glShaderLeft1Scale.initializeGL();
m_glShaderBottom1Scale.initializeGL();
m_glShaderLeft2Scale.initializeGL();
@@ -663,7 +664,12 @@ void GLScope::paintGL()
mat.setToIdentity();
mat.translate(-1.0f + 2.0f * rectX, 1.0f - 2.0f * rectY);
mat.scale(2.0f * rectW, -2.0f * rectH);
m_glShaderSimple.drawPolyline(mat, color, (GLfloat *)&trace[2 * start], end - start);
if (i == 1) { // Y1 in rainbow color
m_glShaderColors.drawPolyline(mat, (GLfloat *)&trace[2 * start], m_q3Colors.m_array, m_displayTraceIntensity / 100.0f, end - start);
} else {
m_glShaderSimple.drawPolyline(mat, color, (GLfloat *)&trace[2 * start], end - start);
}
// Paint trigger level if any
if ((traceData.m_triggerDisplayLevel > -1.0f) && (traceData.m_triggerDisplayLevel < 1.0f))
@@ -796,10 +802,21 @@ void GLScope::paintGL()
mat.translate(-1.0f + 2.0f * rectX, 1.0f - 2.0f * rectY);
mat.scale(2.0f * rectW, -2.0f * rectH);
if (m_displayXYPoints) {
m_glShaderSimple.drawPoints(mat, color, q3, end - start);
} else {
m_glShaderSimple.drawPolyline(mat, color, q3, end - start);
if (i == 1) // Y1 in rainbow color
{
if (m_displayXYPoints) {
m_glShaderColors.drawPoints(mat, q3, m_q3Colors.m_array, m_displayTraceIntensity / 100.0f, end - start);
} else {
m_glShaderColors.drawPolyline(mat, q3, m_q3Colors.m_array, m_displayTraceIntensity / 100.0f, end - start);
}
}
else
{
if (m_displayXYPoints) {
m_glShaderSimple.drawPoints(mat, color, q3, end - start);
} else {
m_glShaderSimple.drawPolyline(mat, color, q3, end - start);
}
}
} // XY polar display
} // trace length > 0
@@ -873,6 +890,8 @@ void GLScope::setTraceSize(int traceSize, bool emitSignal)
{
m_mutex.lock();
m_traceSize = traceSize;
m_q3Colors.allocate(3*traceSize);
setColorPalette(traceSize, m_q3Colors.m_array);
m_configChanged = true;
m_mutex.unlock();
update();
@@ -1950,4 +1969,17 @@ void GLScope::drawCircle(float cx, float cy, float r, int num_segments, bool dot
vertices[4*ii+3] = y + cy;
}
}
}
// https://stackoverflow.com/questions/19452530/how-to-render-a-rainbow-spectrum
void GLScope::setColorPalette(int nbVertices, GLfloat *colors)
{
for (int v = 0; v < nbVertices; v++)
{
float x = 0.8f*(((float) v)/nbVertices);
QColor c = QColor::fromHslF(x, 0.8f, 0.6f);
colors[3*v] = c.redF();
colors[3*v+1] = c.greenF();
colors[3*v+2] = c.blueF();
}
}