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#include <mbgl/renderer/layers/render_circle_layer.hpp>
#include <mbgl/renderer/buckets/circle_bucket.hpp>
#include <mbgl/renderer/render_tile.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/programs/circle_program.hpp>
#include <mbgl/tile/tile.hpp>
#include <mbgl/style/layers/circle_layer_impl.hpp>
#include <mbgl/geometry/feature_index.hpp>
#include <mbgl/util/math.hpp>
#include <mbgl/util/intersection_tests.hpp>
namespace mbgl {
using namespace style;
RenderCircleLayer::RenderCircleLayer(Immutable<style::CircleLayer::Impl> _impl)
: RenderLayer(style::LayerType::Circle, _impl),
unevaluated(impl().paint.untransitioned()) {
}
const style::CircleLayer::Impl& RenderCircleLayer::impl() const {
return static_cast<const style::CircleLayer::Impl&>(*baseImpl);
}
std::unique_ptr<Bucket> RenderCircleLayer::createBucket(const BucketParameters& parameters, const std::vector<const RenderLayer*>& layers) const {
return std::make_unique<CircleBucket>(parameters, layers);
}
void RenderCircleLayer::transition(const TransitionParameters& parameters) {
unevaluated = impl().paint.transitioned(parameters, std::move(unevaluated));
}
void RenderCircleLayer::evaluate(const PropertyEvaluationParameters& parameters) {
evaluated = unevaluated.evaluate(parameters);
passes = ((evaluated.get<style::CircleRadius>().constantOr(1) > 0 ||
evaluated.get<style::CircleStrokeWidth>().constantOr(1) > 0)
&& (evaluated.get<style::CircleColor>().constantOr(Color::black()).a > 0 ||
evaluated.get<style::CircleStrokeColor>().constantOr(Color::black()).a > 0)
&& (evaluated.get<style::CircleOpacity>().constantOr(1) > 0 ||
evaluated.get<style::CircleStrokeOpacity>().constantOr(1) > 0))
? RenderPass::Translucent : RenderPass::None;
}
bool RenderCircleLayer::hasTransition() const {
return unevaluated.hasTransition();
}
void RenderCircleLayer::render(PaintParameters& parameters, RenderSource*) {
if (parameters.pass == RenderPass::Opaque) {
return;
}
const bool scaleWithMap = evaluated.get<CirclePitchScale>() == CirclePitchScaleType::Map;
const bool pitchWithMap = evaluated.get<CirclePitchAlignment>() == AlignmentType::Map;
for (const RenderTile& tile : renderTiles) {
assert(dynamic_cast<CircleBucket*>(tile.tile.getBucket(*baseImpl)));
CircleBucket& bucket = *reinterpret_cast<CircleBucket*>(tile.tile.getBucket(*baseImpl));
const auto& paintPropertyBinders = bucket.paintPropertyBinders.at(getID());
auto& programInstance = parameters.programs.circle.get(evaluated);
const auto allUniformValues = programInstance.computeAllUniformValues(
CircleProgram::UniformValues {
uniforms::u_matrix::Value{
tile.translatedMatrix(evaluated.get<CircleTranslate>(),
evaluated.get<CircleTranslateAnchor>(),
parameters.state)
},
uniforms::u_scale_with_map::Value{ scaleWithMap },
uniforms::u_extrude_scale::Value{ pitchWithMap
? std::array<float, 2> {{
tile.id.pixelsToTileUnits(1, parameters.state.getZoom()),
tile.id.pixelsToTileUnits(1, parameters.state.getZoom()) }}
: parameters.pixelsToGLUnits },
uniforms::u_camera_to_center_distance::Value{ parameters.state.getCameraToCenterDistance() },
uniforms::u_pitch_with_map::Value{ pitchWithMap }
},
paintPropertyBinders,
evaluated,
parameters.state.getZoom()
);
const auto allAttributeBindings = programInstance.computeAllAttributeBindings(
*bucket.vertexBuffer,
paintPropertyBinders,
evaluated
);
checkRenderability(parameters, programInstance.activeBindingCount(allAttributeBindings));
programInstance.draw(
parameters.context,
gl::Triangles(),
parameters.depthModeForSublayer(0, gl::DepthMode::ReadOnly),
parameters.mapMode != MapMode::Continuous
? parameters.stencilModeForClipping(tile.clip)
: gl::StencilMode::disabled(),
parameters.colorModeForRenderPass(),
*bucket.indexBuffer,
bucket.segments,
allUniformValues,
allAttributeBindings,
getID()
);
}
}
GeometryCoordinate projectPoint(const GeometryCoordinate& p, const mat4& posMatrix, const Size& size) {
vec4 pos = {{ static_cast<double>(p.x), static_cast<double>(p.y), 0, 1 }};
matrix::transformMat4(pos, pos, posMatrix);
return {
static_cast<int16_t>((static_cast<float>(pos[0] / pos[3]) + 1) * size.width * 0.5),
static_cast<int16_t>((static_cast<float>(pos[1] / pos[3]) + 1) * size.height * 0.5)
};
}
GeometryCoordinates projectQueryGeometry(const GeometryCoordinates& queryGeometry, const mat4& posMatrix, const Size& size) {
GeometryCoordinates projectedGeometry;
for (auto& p : queryGeometry) {
projectedGeometry.push_back(projectPoint(p, posMatrix, size));
}
return projectedGeometry;
}
bool RenderCircleLayer::queryIntersectsFeature(
const GeometryCoordinates& queryGeometry,
const GeometryTileFeature& feature,
const float zoom,
const TransformState& transformState,
const float pixelsToTileUnits,
const mat4& posMatrix) const {
// Translate query geometry
const GeometryCoordinates& translatedQueryGeometry = FeatureIndex::translateQueryGeometry(
queryGeometry,
evaluated.get<style::CircleTranslate>(),
evaluated.get<style::CircleTranslateAnchor>(),
transformState.getAngle(),
pixelsToTileUnits).value_or(queryGeometry);
// Evaluate functions
auto radius = evaluated.evaluate<style::CircleRadius>(zoom, feature);
auto stroke = evaluated.evaluate<style::CircleStrokeWidth>(zoom, feature);
auto size = radius + stroke;
// For pitch-alignment: map, compare feature geometry to query geometry in the plane of the tile
// Otherwise, compare geometry in the plane of the viewport
// A circle with fixed scaling relative to the viewport gets larger in tile space as it moves into the distance
// A circle with fixed scaling relative to the map gets smaller in viewport space as it moves into the distance
bool alignWithMap = evaluated.evaluate<style::CirclePitchAlignment>(zoom, feature) == AlignmentType::Map;
const GeometryCoordinates& transformedQueryGeometry = alignWithMap ?
translatedQueryGeometry :
projectQueryGeometry(translatedQueryGeometry, posMatrix, transformState.getSize());
auto transformedSize = alignWithMap ? size * pixelsToTileUnits : size;
auto geometry = feature.getGeometries();
for (auto& ring : geometry) {
for (auto& point : ring) {
const GeometryCoordinate& transformedPoint = alignWithMap ? point : projectPoint(point, posMatrix, transformState.getSize());
float adjustedSize = transformedSize;
vec4 center = {{ static_cast<double>(point.x), static_cast<double>(point.y), 0, 1 }};
matrix::transformMat4(center, center, posMatrix);
auto pitchScale = evaluated.evaluate<style::CirclePitchScale>(zoom, feature);
auto pitchAlignment = evaluated.evaluate<style::CirclePitchAlignment>(zoom, feature);
if (pitchScale == CirclePitchScaleType::Viewport && pitchAlignment == AlignmentType::Map) {
adjustedSize *= center[3] / transformState.getCameraToCenterDistance();
} else if (pitchScale == CirclePitchScaleType::Map && pitchAlignment == AlignmentType::Viewport) {
adjustedSize *= transformState.getCameraToCenterDistance() / center[3];
}
if (util::polygonIntersectsBufferedPoint(transformedQueryGeometry, transformedPoint, adjustedSize)) return true;
}
}
return false;
}
} // namespace mbgl
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