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
|
// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.
#include <mbgl/programs/collision_box_program.hpp>
#include <mbgl/programs/gl/preludes.hpp>
#include <mbgl/programs/gl/shader_source.hpp>
#include <mbgl/gl/program.hpp>
namespace mbgl {
namespace programs {
namespace gl {
template <typename>
struct ShaderSource;
template <>
struct ShaderSource<CollisionBoxProgram> {
static constexpr const char* name = "collision_box";
static constexpr const uint8_t hash[8] = { 0xcb, 0x6a, 0x9b, 0xd1, 0x1f, 0x31, 0xf8, 0x5b };
static constexpr const auto vertexOffset = 10000;
static constexpr const auto fragmentOffset = 10679;
};
constexpr const char* ShaderSource<CollisionBoxProgram>::name;
constexpr const uint8_t ShaderSource<CollisionBoxProgram>::hash[8];
} // namespace gl
} // namespace programs
namespace gfx {
template <>
std::unique_ptr<gfx::Program<CollisionBoxProgram>>
Backend::Create<gfx::Backend::Type::OpenGL>(const ProgramParameters& programParameters) {
return std::make_unique<gl::Program<CollisionBoxProgram>>(programParameters);
}
} // namespace gfx
} // namespace mbgl
// Uncompressed source of collision_box.vertex.glsl:
/*
attribute vec2 a_pos;
attribute vec2 a_anchor_pos;
attribute vec2 a_extrude;
attribute vec2 a_placed;
attribute vec2 a_shift;
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 = clamp(
0.5 + 0.5 * (u_camera_to_center_distance / camera_to_anchor_distance),
0.0, // Prevents oversized near-field boxes in pitched/overzoomed tiles
4.0);
gl_Position = u_matrix * vec4(a_pos, 0.0, 1.0);
gl_Position.xy += (a_extrude + a_shift) * u_extrude_scale * gl_Position.w * collision_perspective_ratio;
v_placed = a_placed.x;
v_notUsed = a_placed.y;
}
*/
// Uncompressed source of collision_box.fragment.glsl:
/*
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;
}
}
*/
|
