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// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.
#include <mbgl/shaders/collision_box.hpp>
namespace mbgl {
namespace shaders {
const char* collision_box::name = "collision_box";
const char* collision_box::vertexSource = R"MBGL_SHADER(
attribute vec2 a_pos;
attribute vec2 a_anchor_pos;
attribute vec2 a_extrude;
attribute vec2 a_placed;
uniform mat4 u_matrix;
uniform vec2 u_extrude_scale;
uniform float u_camera_to_center_distance;
varying float v_placed;
varying float v_notUsed;
void main() {
vec4 projectedPoint = u_matrix * vec4(a_anchor_pos, 0, 1);
highp float camera_to_anchor_distance = projectedPoint.w;
highp float collision_perspective_ratio = 0.5 + 0.5 * (u_camera_to_center_distance / camera_to_anchor_distance);
gl_Position = u_matrix * vec4(a_pos, 0.0, 1.0);
gl_Position.xy += a_extrude * u_extrude_scale * gl_Position.w * collision_perspective_ratio;
v_placed = a_placed.x;
v_notUsed = a_placed.y;
}
)MBGL_SHADER";
const char* collision_box::fragmentSource = R"MBGL_SHADER(
varying float v_placed;
varying float v_notUsed;
void main() {
float alpha = 0.5;
// Red = collision, hide label
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0) * alpha;
// Blue = no collision, label is showing
if (v_placed > 0.5) {
gl_FragColor = vec4(0.0, 0.0, 1.0, 0.5) * alpha;
}
if (v_notUsed > 0.5) {
// This box not used, fade it out
gl_FragColor *= .1;
}
}
)MBGL_SHADER";
} // namespace shaders
} // namespace mbgl
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