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Optimize calculation of center for renderLargePoint

pull/1337/head
Hleb Valoshka 2022-01-10 19:34:47 +02:00
parent 772fe24e1b
commit 8f8a2f7677
1 changed files with 31 additions and 10 deletions
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41
src/celengine/render.cpp
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@ -1669,6 +1669,7 @@ void Renderer::draw(const Observer& observer,
enableDepthMask();
}
static
void renderLargePoint(Renderer &renderer,
const Vector3f &position,
const Color &color,
@ -1711,6 +1712,20 @@ void renderLargePoint(Renderer &renderer,
vo.unbind();
}
static Eigen::Vector3f
calculateQuadCenter(const Eigen::Quaternionf &cameraOrientation,
const Eigen::Vector3f &position,
float radius)
{
Matrix3f m = cameraOrientation.conjugate().toRotationMatrix();
// Offset the glare sprite so that it lies in front of the object
Vector3f direction = position.normalized();
// Position the sprite on the the line between the viewer and the
// object, and on a plane normal to the view direction.
return position + direction * (radius / (m * Vector3f::UnitZ()).dot(direction));
}
void
Renderer::calculatePointSize(float appMag,
@ -1798,25 +1813,25 @@ void Renderer::renderObjectAsPoint(const Vector3f& position,
if (glareSize != 0.0f)
glareSize = std::max(glareSize, pointSize * discSizeInPixels / scale * 3.0f);
Matrix3f m = m_cameraOrientation.conjugate().toRotationMatrix();
Vector3f center = position;
// Offset the glare sprite so that it lies in front of the object
Vector3f direction = center.normalized();
// Position the sprite on the the line between the viewer and the
// object, and on a plane normal to the view direction.
center = center + direction * (radius / (m * Vector3f::UnitZ()).dot(direction));
enableDepthTest();
disableDepthMask();
if (starStyle != PointStars)
gaussianDiscTex->bind();
bool centerCalculated = false;
Eigen::Vector3f center;
if (pointSize > gl::maxPointSize)
{
centerCalculated = true;
center = calculateQuadCenter(m_cameraOrientation, position, radius);
renderLargePoint(*this, center, {color, alpha}, pointSize, mvp);
}
else
{
pointStarVertexBuffer->addStar(position, {color, alpha}, pointSize);
}
// If the object is brighter than magnitude 1, add a halo around it to
// make it appear more brilliant. This is a hack to compensate for the
@ -1828,9 +1843,15 @@ void Renderer::renderObjectAsPoint(const Vector3f& position,
{
gaussianGlareTex->bind();
if (glareSize > gl::maxPointSize)
{
if (!centerCalculated)
center = calculateQuadCenter(m_cameraOrientation, position, radius);
renderLargePoint(*this, center, {color, glareAlpha}, glareSize, mvp);
}
else
{
glareVertexBuffer->addStar(position, {color, glareAlpha}, glareSize);
}
}
}
}