1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
#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/gfx/cull_face_mode.hpp>
#include <mbgl/util/math.hpp>
#include <mbgl/util/intersection_tests.hpp>
namespace mbgl {
using namespace style;
inline const style::CircleLayer::Impl& impl(const Immutable<style::Layer::Impl>& impl) {
return static_cast<const style::CircleLayer::Impl&>(*impl);
}
RenderCircleLayer::RenderCircleLayer(Immutable<style::CircleLayer::Impl> _impl)
: RenderLayer(makeMutable<CircleLayerProperties>(std::move(_impl))),
unevaluated(impl(baseImpl).paint.untransitioned()) {
}
void RenderCircleLayer::transition(const TransitionParameters& parameters) {
unevaluated = impl(baseImpl).paint.transitioned(parameters, std::move(unevaluated));
}
void RenderCircleLayer::evaluate(const PropertyEvaluationParameters& parameters) {
auto properties = makeMutable<CircleLayerProperties>(
staticImmutableCast<CircleLayer::Impl>(baseImpl),
unevaluated.evaluate(parameters));
const auto& evaluated = properties->evaluated;
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;
evaluatedProperties = std::move(properties);
}
bool RenderCircleLayer::hasTransition() const {
return unevaluated.hasTransition();
}
bool RenderCircleLayer::hasCrossfade() const {
return false;
}
void RenderCircleLayer::render(PaintParameters& parameters) {
if (parameters.pass == RenderPass::Opaque) {
return;
}
for (const RenderTile& tile : renderTiles) {
const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
if (!renderData) {
continue;
}
auto& bucket = static_cast<CircleBucket&>(*renderData->bucket);
const auto& evaluated = getEvaluated<CircleLayerProperties>(renderData->layerProperties);
const bool scaleWithMap = evaluated.get<CirclePitchScale>() == CirclePitchScaleType::Map;
const bool pitchWithMap = evaluated.get<CirclePitchAlignment>() == AlignmentType::Map;
const auto& paintPropertyBinders = bucket.paintPropertyBinders.at(getID());
auto& programInstance = parameters.programs.getCircleLayerPrograms().circle;
const auto allUniformValues = programInstance.computeAllUniformValues(
CircleProgram::LayoutUniformValues {
uniforms::matrix::Value(
tile.translatedMatrix(evaluated.get<CircleTranslate>(),
evaluated.get<CircleTranslateAnchor>(),
parameters.state)
),
uniforms::scale_with_map::Value( scaleWithMap ),
uniforms::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::device_pixel_ratio::Value( parameters.pixelRatio ),
uniforms::camera_to_center_distance::Value( parameters.state.getCameraToCenterDistance() ),
uniforms::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,
*parameters.renderPass,
gfx::Triangles(),
parameters.depthModeForSublayer(0, gfx::DepthMaskType::ReadOnly),
gfx::StencilMode::disabled(),
parameters.colorModeForRenderPass(),
gfx::CullFaceMode::disabled(),
*bucket.indexBuffer,
bucket.segments,
allUniformValues,
allAttributeBindings,
CircleProgram::TextureBindings{},
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 {
const auto& evaluated = static_cast<const CircleLayerProperties&>(*evaluatedProperties).evaluated;
// Translate query geometry
const GeometryCoordinates& translatedQueryGeometry = FeatureIndex::translateQueryGeometry(
queryGeometry,
evaluated.get<style::CircleTranslate>(),
evaluated.get<style::CircleTranslateAnchor>(),
transformState.getBearing(),
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
|
