Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/OpenGLLinesProgram.cpp @ 804:61ba4b504e9a
PolylineSceneLayer now has one color per chain
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 28 May 2019 15:58:21 +0200 |
| parents | c0a5eb9a4290 |
| children | 1091b2adeb5a |
| rev | line source |
|---|---|
| 592 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium | |
| 6 * | |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "OpenGLLinesProgram.h" | |
|
611
e3f21a265be5
Added version directive to GLSL shader code + glew init function in sample code
Benjamin Golinvaux <bgo@osimis.io>
parents:
592
diff
changeset
|
23 #include "OpenGLShaderVersionDirective.h" |
| 592 | 24 |
| 25 #include <Core/OrthancException.h> | |
| 26 | |
| 27 | |
| 28 static const unsigned int COMPONENTS_POSITION = 3; | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
29 static const unsigned int COMPONENTS_COLOR = 3; |
| 592 | 30 static const unsigned int COMPONENTS_MITER = 2; |
| 31 | |
| 32 | |
| 33 static const char* VERTEX_SHADER = | |
|
611
e3f21a265be5
Added version directive to GLSL shader code + glew init function in sample code
Benjamin Golinvaux <bgo@osimis.io>
parents:
592
diff
changeset
|
34 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 35 "attribute vec2 a_miter_direction; \n" |
| 36 "attribute vec4 a_position; \n" | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
37 "attribute vec3 a_color; \n" |
| 592 | 38 "uniform float u_thickness; \n" |
| 39 "uniform mat4 u_matrix; \n" | |
| 40 "varying float v_distance; \n" | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
41 "varying vec3 v_color; \n" |
| 592 | 42 "void main() \n" |
| 43 "{ \n" | |
| 44 " v_distance = a_position.z; \n" | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
45 " v_color = a_color; \n" |
| 592 | 46 " gl_Position = u_matrix * vec4(a_position.xy + a_position.z * a_miter_direction * u_thickness, 0, 1); \n" |
| 47 "}"; | |
| 48 | |
| 49 | |
| 50 static const char* FRAGMENT_SHADER = | |
|
611
e3f21a265be5
Added version directive to GLSL shader code + glew init function in sample code
Benjamin Golinvaux <bgo@osimis.io>
parents:
592
diff
changeset
|
51 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 52 "uniform bool u_antialiasing; \n" |
| 53 "uniform float u_antialiasing_start; \n" | |
| 54 "varying float v_distance; \n" // Distance of the point to the segment | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
55 "varying vec3 v_color; \n" |
| 592 | 56 "void main() \n" |
| 57 "{ \n" | |
| 58 " float d = abs(v_distance); \n" | |
| 59 " if (!u_antialiasing || \n" | |
| 60 " d <= u_antialiasing_start) \n" | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
61 " gl_FragColor = vec4(v_color, 1); \n" |
| 592 | 62 " else if (d >= 1.0) \n" |
| 63 " gl_FragColor = vec4(0, 0, 0, 0); \n" | |
| 64 " else \n" | |
| 65 " { \n" | |
| 66 " float alpha = 1.0 - smoothstep(u_antialiasing_start, 1.0, d); \n" | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
67 " gl_FragColor = vec4(v_color * alpha, alpha); \n" |
| 592 | 68 " } \n" |
| 69 "}"; | |
| 70 | |
| 71 | |
| 72 namespace OrthancStone | |
| 73 { | |
| 74 namespace Internals | |
| 75 { | |
| 76 class OpenGLLinesProgram::Data::Segment | |
| 77 { | |
| 78 private: | |
| 79 bool isEmpty_; | |
| 80 double x1_; | |
| 81 double y1_; | |
| 82 double x2_; | |
| 83 double y2_; | |
| 84 double miterX1_; | |
| 85 double miterY1_; | |
| 86 double miterX2_; | |
| 87 double miterY2_; | |
| 88 | |
| 89 Vector lineAbove_; // In homogeneous coordinates (size = 3) | |
| 90 Vector lineBelow_; | |
| 91 | |
| 92 public: | |
| 93 Segment(const PolylineSceneLayer::Chain& chain, | |
| 94 size_t index1, | |
| 95 size_t index2) : | |
| 96 isEmpty_(false) | |
| 97 { | |
| 98 if (index1 >= chain.size() || | |
| 99 index2 >= chain.size()) | |
| 100 { | |
| 101 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 102 } | |
| 103 else | |
| 104 { | |
| 105 const ScenePoint2D& p = chain[index1]; | |
| 106 const ScenePoint2D& q = chain[index2]; | |
| 107 | |
| 108 x1_ = p.GetX(); | |
| 109 y1_ = p.GetY(); | |
| 110 x2_ = q.GetX(); | |
| 111 y2_ = q.GetY(); | |
| 112 | |
| 113 const double dx = x2_ - x1_; | |
| 114 const double dy = y2_ - y1_; | |
| 115 const double norm = sqrt(dx * dx + dy * dy); | |
| 116 | |
| 117 if (LinearAlgebra::IsCloseToZero(norm)) | |
| 118 { | |
| 119 isEmpty_ = true; | |
| 120 } | |
| 121 else | |
| 122 { | |
| 123 isEmpty_ = false; | |
| 124 const double normalX = -dy / norm; | |
| 125 const double normalY = dx / norm; | |
| 126 | |
| 127 miterX1_ = normalX; | |
| 128 miterY1_ = normalY; | |
| 129 miterX2_ = normalX; | |
| 130 miterY2_ = normalY; | |
| 131 | |
| 132 Vector a = LinearAlgebra::CreateVector(x1_ + normalX, y1_ + normalY, 1); | |
| 133 Vector b = LinearAlgebra::CreateVector(x2_ + normalX, y2_ + normalY, 1); | |
| 134 LinearAlgebra::CrossProduct(lineAbove_, a, b); | |
| 135 | |
| 136 a = LinearAlgebra::CreateVector(x1_ - normalX, y1_ - normalY, 1); | |
| 137 b = LinearAlgebra::CreateVector(x2_ - normalX, y2_ - normalY, 1); | |
| 138 LinearAlgebra::CrossProduct(lineBelow_, a, b); | |
| 139 } | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 bool IsEmpty() const | |
| 144 { | |
| 145 return isEmpty_; | |
| 146 } | |
| 147 | |
| 148 static double ComputeSignedArea(double x1, | |
| 149 double y1, | |
| 150 double x2, | |
| 151 double y2, | |
| 152 double x3, | |
| 153 double y3) | |
| 154 { | |
| 155 // This computes the signed area of a 2D triangle. This | |
| 156 // formula is e.g. used in the sorting algorithm of Graham's | |
| 157 // scan to compute the convex hull. | |
| 158 // https://en.wikipedia.org/wiki/Graham_scan | |
| 159 return (x2 - x1) * (y3 - y1) - (y2 - y1) * (x3 - x1); | |
| 160 } | |
| 161 | |
| 162 static void CreateMiter(Segment& left, | |
| 163 Segment& right) | |
| 164 { | |
| 165 if (!left.IsEmpty() && | |
| 166 !right.IsEmpty()) | |
| 167 { | |
| 168 Vector above, below; | |
| 169 LinearAlgebra::CrossProduct(above, left.lineAbove_, right.lineAbove_); | |
| 170 LinearAlgebra::CrossProduct(below, left.lineBelow_, right.lineBelow_); | |
| 171 | |
| 172 if (!LinearAlgebra::IsCloseToZero(above[2]) && | |
| 173 !LinearAlgebra::IsCloseToZero(below[2])) | |
| 174 { | |
| 175 // Back to inhomogeneous 2D coordinates | |
| 176 above /= above[2]; | |
| 177 below /= below[2]; | |
| 178 | |
| 179 // Check whether "above" and "below" intersection points | |
| 180 // are on the half-plane defined by the endpoints of the | |
| 181 // two segments. This is an indicator of whether the angle | |
| 182 // is too acute. | |
| 183 double s1 = ComputeSignedArea(left.x1_, left.y1_, | |
| 184 above[0], above[1], | |
| 185 right.x2_, right.y2_); | |
| 186 double s2 = ComputeSignedArea(left.x1_, left.y1_, | |
| 187 below[0], below[1], | |
| 188 right.x2_, right.y2_); | |
| 189 | |
| 190 // The two signed areas must have the same sign | |
| 191 if (s1 * s2 >= 0) | |
| 192 { | |
| 193 left.miterX2_ = above[0] - left.x2_; | |
| 194 left.miterY2_ = above[1] - left.y2_; | |
| 195 | |
| 196 right.miterX1_ = left.miterX2_; | |
| 197 right.miterY1_ = left.miterY2_; | |
| 198 } | |
| 199 } | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 void AddTriangles(std::vector<float>& coords, | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
204 std::vector<float>& miterDirections, |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
205 std::vector<float>& colors, |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
206 const Color& color) |
| 592 | 207 { |
| 208 if (isEmpty_) | |
| 209 { | |
| 210 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 211 } | |
| 212 | |
| 213 // First triangle | |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
214 coords.push_back(static_cast<float>(x1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
215 coords.push_back(static_cast<float>(y1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
216 coords.push_back(static_cast<float>(1)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
217 coords.push_back(static_cast<float>(x2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
218 coords.push_back(static_cast<float>(y2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
219 coords.push_back(static_cast<float>(-1)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
220 coords.push_back(static_cast<float>(x2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
221 coords.push_back(static_cast<float>(y2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
222 coords.push_back(static_cast<float>(1)); |
| 592 | 223 |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
224 miterDirections.push_back(static_cast<float>(miterX1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
225 miterDirections.push_back(static_cast<float>(miterY1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
226 miterDirections.push_back(static_cast<float>(miterX2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
227 miterDirections.push_back(static_cast<float>(miterY2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
228 miterDirections.push_back(static_cast<float>(miterX2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
229 miterDirections.push_back(static_cast<float>(miterY2_)); |
| 592 | 230 |
| 231 // Second triangle | |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
232 coords.push_back(static_cast<float>(x1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
233 coords.push_back(static_cast<float>(y1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
234 coords.push_back(static_cast<float>(1)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
235 coords.push_back(static_cast<float>(x1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
236 coords.push_back(static_cast<float>(y1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
237 coords.push_back(static_cast<float>(-1)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
238 coords.push_back(static_cast<float>(x2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
239 coords.push_back(static_cast<float>(y2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
240 coords.push_back(static_cast<float>(-1)); |
| 592 | 241 |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
242 miterDirections.push_back(static_cast<float>(miterX1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
243 miterDirections.push_back(static_cast<float>(miterY1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
244 miterDirections.push_back(static_cast<float>(miterX1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
245 miterDirections.push_back(static_cast<float>(miterY1_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
246 miterDirections.push_back(static_cast<float>(miterX2_)); |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
247 miterDirections.push_back(static_cast<float>(miterY2_)); |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
248 |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
249 // Add the colors of the 2 triangles (leading to 2 * 3 values) |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
250 for (unsigned int i = 0; i < 6; i++) |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
251 { |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
252 colors.push_back(color.GetRedAsFloat()); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
253 colors.push_back(color.GetGreenAsFloat()); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
254 colors.push_back(color.GetBlueAsFloat()); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
255 } |
| 592 | 256 } |
| 257 }; | |
| 258 | |
| 259 | |
| 260 OpenGLLinesProgram::Data::Data(OpenGL::IOpenGLContext& context, | |
| 261 const PolylineSceneLayer& layer) : | |
| 262 context_(context), | |
| 263 verticesCount_(0), | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
264 thickness_(static_cast<float>(layer.GetThickness())) |
| 592 | 265 { |
| 266 // High-level reference: | |
| 267 // https://mattdesl.svbtle.com/drawing-lines-is-hard | |
| 268 // https://forum.libcinder.org/topic/smooth-thick-lines-using-geometry-shader | |
| 269 | |
| 270 size_t countVertices = 0; | |
| 271 for (size_t i = 0; i < layer.GetChainsCount(); i++) | |
| 272 { | |
| 273 size_t countSegments = layer.GetChain(i).size() - 1; | |
| 274 | |
| 275 if (layer.IsClosedChain(i)) | |
| 276 { | |
| 277 countSegments++; | |
| 278 } | |
| 279 | |
| 280 // Each segment is made of 2 triangles. One triangle is | |
| 281 // defined by 3 points in 2D => 6 vertices per segment. | |
| 282 countVertices += countSegments * 2 * 3; | |
| 283 } | |
| 284 | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
285 std::vector<float> coords, colors, miterDirections; |
| 592 | 286 coords.reserve(countVertices * COMPONENTS_POSITION); |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
287 colors.reserve(countVertices * COMPONENTS_COLOR); |
| 592 | 288 miterDirections.reserve(countVertices * COMPONENTS_MITER); |
| 289 | |
| 290 for (size_t i = 0; i < layer.GetChainsCount(); i++) | |
| 291 { | |
| 292 const PolylineSceneLayer::Chain& chain = layer.GetChain(i); | |
| 293 | |
| 294 if (chain.size() > 1) | |
| 295 { | |
| 296 std::vector<Segment> segments; | |
| 297 for (size_t j = 1; j < chain.size(); j++) | |
| 298 { | |
| 299 segments.push_back(Segment(chain, j - 1, j)); | |
| 300 } | |
| 301 | |
| 302 if (layer.IsClosedChain(i)) | |
| 303 { | |
| 304 segments.push_back(Segment(chain, chain.size() - 1, 0)); | |
| 305 } | |
| 306 | |
| 307 // Try and create nice miters | |
| 308 for (size_t j = 1; j < segments.size(); j++) | |
| 309 { | |
| 310 Segment::CreateMiter(segments[j - 1], segments[j]); | |
| 311 } | |
| 312 | |
| 313 if (layer.IsClosedChain(i)) | |
| 314 { | |
| 315 Segment::CreateMiter(segments.back(), segments.front()); | |
| 316 } | |
| 317 | |
| 318 for (size_t j = 0; j < segments.size(); j++) | |
| 319 { | |
| 320 if (!segments[j].IsEmpty()) | |
| 321 { | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
322 segments[j].AddTriangles(coords, miterDirections, colors, layer.GetColor(i)); |
| 592 | 323 } |
| 324 } | |
| 325 } | |
| 326 } | |
| 327 | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
328 assert(coords.size() == colors.size()); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
329 |
| 592 | 330 if (!coords.empty()) |
| 331 { | |
| 332 verticesCount_ = coords.size() / COMPONENTS_POSITION; | |
| 333 | |
| 334 context_.MakeCurrent(); | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
335 glGenBuffers(3, buffers_); |
| 592 | 336 |
| 337 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); | |
| 338 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * coords.size(), &coords[0], GL_STATIC_DRAW); | |
| 339 | |
| 340 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); | |
| 341 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * miterDirections.size(), &miterDirections[0], GL_STATIC_DRAW); | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
342 |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
343 glBindBuffer(GL_ARRAY_BUFFER, buffers_[2]); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
344 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * colors.size(), &colors[0], GL_STATIC_DRAW); |
| 592 | 345 } |
| 346 } | |
| 347 | |
| 348 | |
| 349 OpenGLLinesProgram::Data::~Data() | |
| 350 { | |
| 351 if (!IsEmpty()) | |
| 352 { | |
| 353 context_.MakeCurrent(); | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
354 glDeleteBuffers(3, buffers_); |
| 592 | 355 } |
| 356 } | |
| 357 | |
| 358 | |
| 359 GLuint OpenGLLinesProgram::Data::GetVerticesBuffer() const | |
| 360 { | |
| 361 if (IsEmpty()) | |
| 362 { | |
| 363 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 364 } | |
| 365 else | |
| 366 { | |
| 367 return buffers_[0]; | |
| 368 } | |
| 369 } | |
| 370 | |
| 371 | |
| 372 GLuint OpenGLLinesProgram::Data::GetMiterDirectionsBuffer() const | |
| 373 { | |
| 374 if (IsEmpty()) | |
| 375 { | |
| 376 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 377 } | |
| 378 else | |
| 379 { | |
| 380 return buffers_[1]; | |
| 381 } | |
| 382 } | |
| 383 | |
| 384 | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
385 GLuint OpenGLLinesProgram::Data::GetColorsBuffer() const |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
386 { |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
387 if (IsEmpty()) |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
388 { |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
389 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
390 } |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
391 else |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
392 { |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
393 return buffers_[2]; |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
394 } |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
395 } |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
396 |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
397 |
| 592 | 398 OpenGLLinesProgram::OpenGLLinesProgram(OpenGL::IOpenGLContext& context) : |
| 399 context_(context) | |
| 400 { | |
| 401 context_.MakeCurrent(); | |
| 402 | |
| 403 program_.reset(new OpenGL::OpenGLProgram); | |
| 404 program_->CompileShaders(VERTEX_SHADER, FRAGMENT_SHADER); | |
| 405 } | |
| 406 | |
| 407 | |
| 408 void OpenGLLinesProgram::Apply(const Data& data, | |
| 409 const AffineTransform2D& transform, | |
| 410 bool antialiasing, | |
| 411 bool scaleIndependantThickness) | |
| 412 { | |
| 413 if (!data.IsEmpty()) | |
| 414 { | |
| 415 context_.MakeCurrent(); | |
| 416 program_->Use(); | |
| 417 | |
| 418 GLint locationPosition = program_->GetAttributeLocation("a_position"); | |
| 419 GLint locationMiterDirection = program_->GetAttributeLocation("a_miter_direction"); | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
420 GLint locationColor = program_->GetAttributeLocation("a_color"); |
| 592 | 421 |
| 422 float m[16]; | |
| 423 transform.ConvertToOpenGLMatrix(m, context_.GetCanvasWidth(), context_.GetCanvasHeight()); | |
| 424 | |
| 425 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m); | |
| 426 | |
| 427 glBindBuffer(GL_ARRAY_BUFFER, data.GetVerticesBuffer()); | |
| 428 glEnableVertexAttribArray(locationPosition); | |
| 429 glVertexAttribPointer(locationPosition, COMPONENTS_POSITION, GL_FLOAT, GL_FALSE, 0, 0); | |
| 430 | |
| 431 glBindBuffer(GL_ARRAY_BUFFER, data.GetMiterDirectionsBuffer()); | |
| 432 glEnableVertexAttribArray(locationMiterDirection); | |
| 433 glVertexAttribPointer(locationMiterDirection, COMPONENTS_MITER, GL_FLOAT, GL_FALSE, 0, 0); | |
| 434 | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
435 glBindBuffer(GL_ARRAY_BUFFER, data.GetColorsBuffer()); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
436 glEnableVertexAttribArray(locationColor); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
437 glVertexAttribPointer(locationColor, COMPONENTS_COLOR, GL_FLOAT, GL_FALSE, 0, 0); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
438 |
| 592 | 439 glUniform1i(program_->GetUniformLocation("u_antialiasing"), (antialiasing ? 1 : 0)); |
| 440 | |
| 441 const double zoom = transform.ComputeZoom(); | |
| 442 const double thickness = data.GetThickness() / 2.0; | |
| 443 const double aliasingBorder = 2.0; // Border for antialiasing ramp, in pixels | |
| 444 assert(aliasingBorder > 0); // Prevent division by zero with "t1" | |
| 445 | |
| 446 if (scaleIndependantThickness) | |
| 447 { | |
| 448 if (antialiasing) | |
| 449 { | |
| 450 double t1 = std::max(thickness, aliasingBorder); | |
| 451 double t0 = std::max(0.0, thickness - aliasingBorder); | |
| 452 | |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
453 glUniform1f(program_->GetUniformLocation("u_thickness"), |
|
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
454 static_cast<GLfloat>(t1 / zoom)); |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
455 glUniform1f(program_->GetUniformLocation("u_antialiasing_start"), |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
456 static_cast<GLfloat>(t0 / t1)); |
| 592 | 457 } |
| 458 else | |
| 459 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
460 glUniform1f(program_->GetUniformLocation("u_thickness"), |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
461 static_cast<GLfloat>(thickness / zoom)); |
| 592 | 462 } |
| 463 } | |
| 464 else | |
| 465 { | |
| 466 if (antialiasing) | |
| 467 { | |
| 468 double t1 = std::max(thickness, aliasingBorder / zoom); | |
| 469 double t0 = std::max(0.0, thickness - aliasingBorder / zoom); | |
| 470 | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
471 glUniform1f(program_->GetUniformLocation("u_thickness"), |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
472 static_cast<GLfloat>(t1)); |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
473 glUniform1f(program_->GetUniformLocation("u_antialiasing_start"), |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
474 static_cast<GLfloat>(t0 / t1)); |
| 592 | 475 } |
| 476 else | |
| 477 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
478 glUniform1f(program_->GetUniformLocation("u_thickness"), |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
479 static_cast<GLfloat>(thickness)); |
| 592 | 480 } |
| 481 } | |
| 482 | |
| 483 if (antialiasing) | |
| 484 { | |
| 485 glEnable(GL_BLEND); | |
| 486 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
487 glDrawArrays(GL_TRIANGLES, 0, |
|
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
488 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 489 glDisable(GL_BLEND); |
| 490 } | |
| 491 else | |
| 492 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
493 glDrawArrays(GL_TRIANGLES, 0, |
|
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
494 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 495 } |
| 496 | |
| 497 glDisableVertexAttribArray(locationPosition); | |
| 498 glDisableVertexAttribArray(locationMiterDirection); | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
499 glDisableVertexAttribArray(locationColor); |
| 592 | 500 } |
| 501 } | |
| 502 } | |
| 503 } |