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Search for hovered lines in parallel

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This commit is contained in:
Dan Paulat 2023-08-28 23:51:24 -05:00
parent 2c3de1a28f
commit 24c919afb6
1 changed files with 37 additions and 30 deletions
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67
scwx-qt/source/scwx/qt/gl/draw/placefile_lines.cpp
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@ -4,6 +4,8 @@
#include <scwx/qt/util/maplibre.hpp>
#include <scwx/util/logger.hpp>
#include <execution>
namespace scwx
{
namespace qt
@ -255,37 +257,42 @@ bool PlacefileLines::RunMousePicking(
glm::vec3(0.0f, 0.0f, 1.0f));
// For each pickable line
for (auto& line : p->currentHoverLines_)
{
// Initialize vertices
glm::vec2 bl = line.p1_;
glm::vec2 br = bl;
glm::vec2 tl = line.p2_;
glm::vec2 tr = tl;
// Calculate offsets
// - 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;
bl += obl;
br += obr;
tr += otr;
// TODO: X/Y offsets
// Test point against polygon bounds
if (util::maplibre::IsPointInPolygon({tl, bl, br, tr}, mousePos))
auto it = std::find_if(
std::execution::par_unseq,
p->currentHoverLines_.cbegin(),
p->currentHoverLines_.cend(),
[&mapMatrix, &mousePos](const auto& line)
{
itemPicked = true;
util::ImGui::Instance().DrawTooltip(line.di_->hoverText_);
break;
}
// Initialize vertices
glm::vec2 bl = line.p1_;
glm::vec2 br = bl;
glm::vec2 tl = line.p2_;
glm::vec2 tr = tl;
// Calculate offsets
// - 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;
bl += obl;
br += obr;
tr += otr;
// TODO: X/Y offsets
// Test point against polygon bounds
return util::maplibre::IsPointInPolygon({tl, bl, br, tr}, mousePos);
});
if (it != p->currentHoverLines_.cend())
{
itemPicked = true;
util::ImGui::Instance().DrawTooltip(it->di_->hoverText_);
}
return itemPicked;