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Fixing placefile line hover offsets

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This commit is contained in:
Dan Paulat 2023-08-28 23:09:05 -05:00
parent 8dfb9f1105
commit 5bb5093579
1 changed files with 45 additions and 39 deletions
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84
scwx-qt/source/scwx/qt/gl/draw/placefile_lines.cpp
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@ -34,11 +34,15 @@ class PlacefileLines::Impl
public:
struct LineHoverEntry
{
std::string hoverText_;
glm::vec2 p1_;
glm::vec2 p2_;
glm::mat2 rotate_;
float width_;
std::shared_ptr<const gr::Placefile::LineDrawItem> di_;
glm::vec2 p1_;
glm::vec2 p2_;
glm::vec2 otl_;
glm::vec2 otr_;
glm::vec2 obl_;
glm::vec2 obr_;
float width_;
};
explicit Impl(const std::shared_ptr<GlContext>& context) :
@ -56,13 +60,14 @@ public:
~Impl() {}
void BufferLine(const gr::Placefile::LineDrawItem::Element& e1,
const gr::Placefile::LineDrawItem::Element& e2,
const float width,
const units::angle::degrees<double> angle,
const boost::gil::rgba8_pixel_t color,
const GLint threshold,
const std::string& hoverText = {});
void BufferLine(const std::shared_ptr<const gr::Placefile::LineDrawItem>& di,
const gr::Placefile::LineDrawItem::Element& e1,
const gr::Placefile::LineDrawItem::Element& e2,
const float width,
const units::angle::degrees<double> angle,
const boost::gil::rgba8_pixel_t color,
const GLint threshold,
bool bufferHover = false);
void
UpdateBuffers(const std::shared_ptr<const gr::Placefile::LineDrawItem>& di);
void Update();
@ -298,7 +303,7 @@ bool PlacefileLines::RunMousePicking(
// Calculate map scale, remove width and height from original calculation
glm::vec2 scale = util::maplibre::GetMapScale(params);
scale = 1.0f / glm::vec2 {scale.x * params.width, scale.y * params.height};
scale = 2.0f / glm::vec2 {scale.x * params.width, scale.y * params.height};
// Scale and rotate the identity matrix to create the map matrix
glm::mat4 mapMatrix {1.0f};
@ -317,19 +322,12 @@ bool PlacefileLines::RunMousePicking(
glm::vec2 tr = tl;
// Calculate offsets
// - Offset is half the line width (pixels) in each direction
// - Rotate the offset at each vertex
// - Multiply the offset by the map matrix
const float hw = line.width_ * 0.5f;
const glm::vec2 otl =
mapMatrix *
glm::vec4 {line.rotate_ * glm::vec2 {-hw, -hw}, 0.0f, 1.0f};
const glm::vec2 obl =
mapMatrix * glm::vec4 {line.rotate_ * glm::vec2 {-hw, hw}, 0.0f, 1.0f};
const glm::vec2 obr =
mapMatrix * glm::vec4 {line.rotate_ * glm::vec2 {hw, hw}, 0.0f, 1.0f};
const glm::vec2 otr =
mapMatrix * glm::vec4 {line.rotate_ * glm::vec2 {hw, -hw}, 0.0f, 1.0f};
// - Pre-rotated offset is half the line width (pixels) in each direction
// - Multiply the offset by the scaled and rotated map matrix
const glm::vec2 otl = mapMatrix * glm::vec4 {line.otl_, 0.0f, 1.0f};
const glm::vec2 obl = mapMatrix * glm::vec4 {line.obl_, 0.0f, 1.0f};
const glm::vec2 obr = mapMatrix * glm::vec4 {line.obr_, 0.0f, 1.0f};
const glm::vec2 otr = mapMatrix * glm::vec4 {line.otr_, 0.0f, 1.0f};
// Offset vertices
tl += otl;
@ -343,7 +341,7 @@ bool PlacefileLines::RunMousePicking(
if (IsPointInPolygon({tl, bl, br, tr}, mousePos))
{
itemPicked = true;
DrawTooltip(line.hoverText_);
DrawTooltip(line.di_->hoverText_);
break;
}
}
@ -419,13 +417,14 @@ void PlacefileLines::Impl::UpdateBuffers(
angles.push_back(angle);
// Buffer line with hover text
BufferLine(di->elements_[i],
BufferLine(di,
di->elements_[i],
di->elements_[i + 1],
di->width_ + 2,
angle,
kBlack_,
thresholdValue,
di->hoverText_);
true);
}
// For each element pair inside a Line statement, render a colored line
@ -433,7 +432,8 @@ void PlacefileLines::Impl::UpdateBuffers(
{
auto angle = angles[i];
BufferLine(di->elements_[i],
BufferLine(di,
di->elements_[i],
di->elements_[i + 1],
di->width_,
angle,
@ -443,13 +443,14 @@ void PlacefileLines::Impl::UpdateBuffers(
}
void PlacefileLines::Impl::BufferLine(
const gr::Placefile::LineDrawItem::Element& e1,
const gr::Placefile::LineDrawItem::Element& e2,
const float width,
const units::angle::degrees<double> angle,
const boost::gil::rgba8_pixel_t color,
const GLint threshold,
const std::string& hoverText)
const std::shared_ptr<const gr::Placefile::LineDrawItem>& di,
const gr::Placefile::LineDrawItem::Element& e1,
const gr::Placefile::LineDrawItem::Element& e2,
const float width,
const units::angle::degrees<double> angle,
const boost::gil::rgba8_pixel_t color,
const GLint threshold,
bool bufferHover)
{
// Latitude and longitude coordinates in degrees
const float lat1 = static_cast<float>(e1.latitude_);
@ -494,7 +495,7 @@ void PlacefileLines::Impl::BufferLine(
newThresholdBuffer_.end(),
{threshold, threshold, threshold, threshold, threshold, threshold});
if (!hoverText.empty())
if (bufferHover && !di->hoverText_.empty())
{
const units::angle::radians<double> radians = angle;
@ -506,8 +507,13 @@ void PlacefileLines::Impl::BufferLine(
const glm::mat2 rotate {cosAngle, -sinAngle, sinAngle, cosAngle};
const glm::vec2 otl = rotate * glm::vec2 {-hw, +hw};
const glm::vec2 otr = rotate * glm::vec2 {+hw, +hw};
const glm::vec2 obl = rotate * glm::vec2 {-hw, -hw};
const glm::vec2 obr = rotate * glm::vec2 {+hw, -hw};
newHoverLines_.emplace_back(
LineHoverEntry {hoverText, sc1, sc2, rotate, width});
LineHoverEntry {di, sc1, sc2, otl, otr, obl, obr, width});
}
}