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
|
#include "circle_shape.hpp"
#include "../drape/batcher.hpp"
#include "../drape/attribute_provider.hpp"
#include "../drape/glstate.hpp"
#include "../drape/shader_def.hpp"
#define BLOCK_X_OFFSET 0
#define BLOCK_Y_OFFSET 1
#define BLOCK_Z_OFFSET 2
#define BLOCK_NX_OFFSET 3
#define BLOCK_NY_OFFSET 4
namespace df
{
namespace
{
void AddPoint(vector<float> & stream, size_t pointIndex, float x, float y, float z, float nX, float nY)
{
size_t startIndex = pointIndex * 5;
stream[startIndex + BLOCK_X_OFFSET] = x;
stream[startIndex + BLOCK_Y_OFFSET] = y;
stream[startIndex + BLOCK_Z_OFFSET] = z;
stream[startIndex + BLOCK_NX_OFFSET] = nX;
stream[startIndex + BLOCK_NY_OFFSET] = nY;
}
} // namespace
CircleShape::CircleShape(m2::PointF const & mercatorPt, CircleViewParams const & params)
: m_pt(mercatorPt)
, m_params(params)
{
}
void CircleShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::TextureSetHolder>) const
{
double const TriangleCount = 20.0;
double const etalonSector = (2.0 * math::pi) / TriangleCount;
/// x, y, z floats on geompoint
/// normal x, y on triangle forming normals
/// 20 triangles on full circle
/// 22 points as triangle fan need n + 2 points on n triangles
vector<float> stream((3 + 2) * (TriangleCount + 2));
AddPoint(stream, 0, m_pt.x, m_pt.y, m_params.m_depth, 0.0f, 0.0f);
m2::PointD startNormal(0.0f, m_params.m_radius);
for (size_t i = 0; i < TriangleCount + 1; ++i)
{
m2::PointD rotatedNormal = m2::Rotate(startNormal, (i) * etalonSector);
AddPoint(stream, i + 1, m_pt.x, m_pt.y, m_params.m_depth, rotatedNormal.x, rotatedNormal.y);
}
dp::GLState state(gpu::SOLID_SHAPE_PROGRAM, dp::GLState::OverlayLayer);
state.SetColor(m_params.m_color);
dp::AttributeProvider provider(1, TriangleCount + 2);
dp::BindingInfo info(2);
dp::BindingDecl & posDecl = info.GetBindingDecl(0);
posDecl.m_attributeName = "a_position";
posDecl.m_componentCount = 3;
posDecl.m_componentType = gl_const::GLFloatType;
posDecl.m_offset = 0;
posDecl.m_stride = 5 * sizeof(float);
dp::BindingDecl & normalDecl = info.GetBindingDecl(1);
normalDecl.m_attributeName = "a_normal";
normalDecl.m_componentCount = 2;
normalDecl.m_componentType = gl_const::GLFloatType;
normalDecl.m_offset = 3 * sizeof(float);
normalDecl.m_stride = 5 * sizeof(float);
dp::OverlayHandle * overlay = new dp::SquareHandle(m_params.m_id,
dp::Center, m_pt,
m2::PointD(m_params.m_radius, m_params.m_radius),
m_params.m_depth);
provider.InitStream(0, info, dp::MakeStackRefPointer<void>(&stream[0]));
batcher->InsertTriangleFan(state, dp::MakeStackRefPointer(&provider), dp::MovePointer(overlay));
}
} // namespace df
|
