Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/OpenGLLinesProgram.cpp @ 700:059e1fd05fd6 refactor-viewport-controller
Introduced the ViewportController that sits between the application and the
Scene2D to handle the trackers and measuring tools. This is a work in progress.
The Scene2D is no longer an observable. Message sending is managed by the
ViewportController.
Move some refs to shared and weak to prevent lifetime issues.
| author | Benjamin Golinvaux <bgo@osimis.io> |
|---|---|
| date | Sun, 19 May 2019 16:26:17 +0200 |
| parents | 5c551f078c18 |
| children | c0a5eb9a4290 |
| 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; | |
| 29 static const unsigned int COMPONENTS_MITER = 2; | |
| 30 | |
| 31 | |
| 32 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
|
33 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 34 "attribute vec2 a_miter_direction; \n" |
| 35 "attribute vec4 a_position; \n" | |
| 36 "uniform float u_thickness; \n" | |
| 37 "uniform mat4 u_matrix; \n" | |
| 38 "varying float v_distance; \n" | |
| 39 "void main() \n" | |
| 40 "{ \n" | |
| 41 " v_distance = a_position.z; \n" | |
| 42 " gl_Position = u_matrix * vec4(a_position.xy + a_position.z * a_miter_direction * u_thickness, 0, 1); \n" | |
| 43 "}"; | |
| 44 | |
| 45 | |
| 46 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
|
47 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 48 "uniform bool u_antialiasing; \n" |
| 49 "uniform float u_antialiasing_start; \n" | |
| 50 "uniform vec3 u_color; \n" | |
| 51 "varying float v_distance; \n" // Distance of the point to the segment | |
| 52 "void main() \n" | |
| 53 "{ \n" | |
| 54 " float d = abs(v_distance); \n" | |
| 55 " if (!u_antialiasing || \n" | |
| 56 " d <= u_antialiasing_start) \n" | |
| 57 " gl_FragColor = vec4(u_color, 1); \n" | |
| 58 " else if (d >= 1.0) \n" | |
| 59 " gl_FragColor = vec4(0, 0, 0, 0); \n" | |
| 60 " else \n" | |
| 61 " { \n" | |
| 62 " float alpha = 1.0 - smoothstep(u_antialiasing_start, 1.0, d); \n" | |
| 63 " gl_FragColor = vec4(u_color * alpha, alpha); \n" | |
| 64 " } \n" | |
| 65 "}"; | |
| 66 | |
| 67 | |
| 68 namespace OrthancStone | |
| 69 { | |
| 70 namespace Internals | |
| 71 { | |
| 72 class OpenGLLinesProgram::Data::Segment | |
| 73 { | |
| 74 private: | |
| 75 bool isEmpty_; | |
| 76 double x1_; | |
| 77 double y1_; | |
| 78 double x2_; | |
| 79 double y2_; | |
| 80 double miterX1_; | |
| 81 double miterY1_; | |
| 82 double miterX2_; | |
| 83 double miterY2_; | |
| 84 | |
| 85 Vector lineAbove_; // In homogeneous coordinates (size = 3) | |
| 86 Vector lineBelow_; | |
| 87 | |
| 88 public: | |
| 89 Segment(const PolylineSceneLayer::Chain& chain, | |
| 90 size_t index1, | |
| 91 size_t index2) : | |
| 92 isEmpty_(false) | |
| 93 { | |
| 94 if (index1 >= chain.size() || | |
| 95 index2 >= chain.size()) | |
| 96 { | |
| 97 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 98 } | |
| 99 else | |
| 100 { | |
| 101 const ScenePoint2D& p = chain[index1]; | |
| 102 const ScenePoint2D& q = chain[index2]; | |
| 103 | |
| 104 x1_ = p.GetX(); | |
| 105 y1_ = p.GetY(); | |
| 106 x2_ = q.GetX(); | |
| 107 y2_ = q.GetY(); | |
| 108 | |
| 109 const double dx = x2_ - x1_; | |
| 110 const double dy = y2_ - y1_; | |
| 111 const double norm = sqrt(dx * dx + dy * dy); | |
| 112 | |
| 113 if (LinearAlgebra::IsCloseToZero(norm)) | |
| 114 { | |
| 115 isEmpty_ = true; | |
| 116 } | |
| 117 else | |
| 118 { | |
| 119 isEmpty_ = false; | |
| 120 const double normalX = -dy / norm; | |
| 121 const double normalY = dx / norm; | |
| 122 | |
| 123 miterX1_ = normalX; | |
| 124 miterY1_ = normalY; | |
| 125 miterX2_ = normalX; | |
| 126 miterY2_ = normalY; | |
| 127 | |
| 128 Vector a = LinearAlgebra::CreateVector(x1_ + normalX, y1_ + normalY, 1); | |
| 129 Vector b = LinearAlgebra::CreateVector(x2_ + normalX, y2_ + normalY, 1); | |
| 130 LinearAlgebra::CrossProduct(lineAbove_, a, b); | |
| 131 | |
| 132 a = LinearAlgebra::CreateVector(x1_ - normalX, y1_ - normalY, 1); | |
| 133 b = LinearAlgebra::CreateVector(x2_ - normalX, y2_ - normalY, 1); | |
| 134 LinearAlgebra::CrossProduct(lineBelow_, a, b); | |
| 135 } | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 bool IsEmpty() const | |
| 140 { | |
| 141 return isEmpty_; | |
| 142 } | |
| 143 | |
| 144 static double ComputeSignedArea(double x1, | |
| 145 double y1, | |
| 146 double x2, | |
| 147 double y2, | |
| 148 double x3, | |
| 149 double y3) | |
| 150 { | |
| 151 // This computes the signed area of a 2D triangle. This | |
| 152 // formula is e.g. used in the sorting algorithm of Graham's | |
| 153 // scan to compute the convex hull. | |
| 154 // https://en.wikipedia.org/wiki/Graham_scan | |
| 155 return (x2 - x1) * (y3 - y1) - (y2 - y1) * (x3 - x1); | |
| 156 } | |
| 157 | |
| 158 static void CreateMiter(Segment& left, | |
| 159 Segment& right) | |
| 160 { | |
| 161 if (!left.IsEmpty() && | |
| 162 !right.IsEmpty()) | |
| 163 { | |
| 164 Vector above, below; | |
| 165 LinearAlgebra::CrossProduct(above, left.lineAbove_, right.lineAbove_); | |
| 166 LinearAlgebra::CrossProduct(below, left.lineBelow_, right.lineBelow_); | |
| 167 | |
| 168 if (!LinearAlgebra::IsCloseToZero(above[2]) && | |
| 169 !LinearAlgebra::IsCloseToZero(below[2])) | |
| 170 { | |
| 171 // Back to inhomogeneous 2D coordinates | |
| 172 above /= above[2]; | |
| 173 below /= below[2]; | |
| 174 | |
| 175 // Check whether "above" and "below" intersection points | |
| 176 // are on the half-plane defined by the endpoints of the | |
| 177 // two segments. This is an indicator of whether the angle | |
| 178 // is too acute. | |
| 179 double s1 = ComputeSignedArea(left.x1_, left.y1_, | |
| 180 above[0], above[1], | |
| 181 right.x2_, right.y2_); | |
| 182 double s2 = ComputeSignedArea(left.x1_, left.y1_, | |
| 183 below[0], below[1], | |
| 184 right.x2_, right.y2_); | |
| 185 | |
| 186 // The two signed areas must have the same sign | |
| 187 if (s1 * s2 >= 0) | |
| 188 { | |
| 189 left.miterX2_ = above[0] - left.x2_; | |
| 190 left.miterY2_ = above[1] - left.y2_; | |
| 191 | |
| 192 right.miterX1_ = left.miterX2_; | |
| 193 right.miterY1_ = left.miterY2_; | |
| 194 } | |
| 195 } | |
| 196 } | |
| 197 } | |
| 198 | |
| 199 void AddTriangles(std::vector<float>& coords, | |
| 200 std::vector<float>& miterDirections) | |
| 201 { | |
| 202 if (isEmpty_) | |
| 203 { | |
| 204 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 205 } | |
| 206 | |
| 207 // 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
|
208 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
|
209 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
|
210 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
|
211 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
|
212 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
|
213 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
|
214 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
|
215 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
|
216 coords.push_back(static_cast<float>(1)); |
| 592 | 217 |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
218 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
|
219 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
|
220 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
|
221 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
|
222 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
|
223 miterDirections.push_back(static_cast<float>(miterY2_)); |
| 592 | 224 |
| 225 // 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
|
226 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
|
227 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
|
228 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
|
229 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
|
230 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
|
231 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
|
232 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
|
233 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
|
234 coords.push_back(static_cast<float>(-1)); |
| 592 | 235 |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
236 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
|
237 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
|
238 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
|
239 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
|
240 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
|
241 miterDirections.push_back(static_cast<float>(miterY2_)); |
| 592 | 242 } |
| 243 }; | |
| 244 | |
| 245 | |
| 246 OpenGLLinesProgram::Data::Data(OpenGL::IOpenGLContext& context, | |
| 247 const PolylineSceneLayer& layer) : | |
| 248 context_(context), | |
| 249 verticesCount_(0), | |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
250 thickness_(static_cast<float>(layer.GetThickness())), |
| 592 | 251 red_(layer.GetRedAsFloat()), |
| 252 green_(layer.GetGreenAsFloat()), | |
| 253 blue_(layer.GetBlueAsFloat()) | |
| 254 { | |
| 255 // High-level reference: | |
| 256 // https://mattdesl.svbtle.com/drawing-lines-is-hard | |
| 257 // https://forum.libcinder.org/topic/smooth-thick-lines-using-geometry-shader | |
| 258 | |
| 259 size_t countVertices = 0; | |
| 260 for (size_t i = 0; i < layer.GetChainsCount(); i++) | |
| 261 { | |
| 262 size_t countSegments = layer.GetChain(i).size() - 1; | |
| 263 | |
| 264 if (layer.IsClosedChain(i)) | |
| 265 { | |
| 266 countSegments++; | |
| 267 } | |
| 268 | |
| 269 // Each segment is made of 2 triangles. One triangle is | |
| 270 // defined by 3 points in 2D => 6 vertices per segment. | |
| 271 countVertices += countSegments * 2 * 3; | |
| 272 } | |
| 273 | |
| 274 std::vector<float> coords, miterDirections; | |
| 275 coords.reserve(countVertices * COMPONENTS_POSITION); | |
| 276 miterDirections.reserve(countVertices * COMPONENTS_MITER); | |
| 277 | |
| 278 for (size_t i = 0; i < layer.GetChainsCount(); i++) | |
| 279 { | |
| 280 const PolylineSceneLayer::Chain& chain = layer.GetChain(i); | |
| 281 | |
| 282 if (chain.size() > 1) | |
| 283 { | |
| 284 std::vector<Segment> segments; | |
| 285 for (size_t j = 1; j < chain.size(); j++) | |
| 286 { | |
| 287 segments.push_back(Segment(chain, j - 1, j)); | |
| 288 } | |
| 289 | |
| 290 if (layer.IsClosedChain(i)) | |
| 291 { | |
| 292 segments.push_back(Segment(chain, chain.size() - 1, 0)); | |
| 293 } | |
| 294 | |
| 295 // Try and create nice miters | |
| 296 for (size_t j = 1; j < segments.size(); j++) | |
| 297 { | |
| 298 Segment::CreateMiter(segments[j - 1], segments[j]); | |
| 299 } | |
| 300 | |
| 301 if (layer.IsClosedChain(i)) | |
| 302 { | |
| 303 Segment::CreateMiter(segments.back(), segments.front()); | |
| 304 } | |
| 305 | |
| 306 for (size_t j = 0; j < segments.size(); j++) | |
| 307 { | |
| 308 if (!segments[j].IsEmpty()) | |
| 309 { | |
| 310 segments[j].AddTriangles(coords, miterDirections); | |
| 311 } | |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 if (!coords.empty()) | |
| 317 { | |
| 318 verticesCount_ = coords.size() / COMPONENTS_POSITION; | |
| 319 | |
| 320 context_.MakeCurrent(); | |
| 321 glGenBuffers(2, buffers_); | |
| 322 | |
| 323 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); | |
| 324 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * coords.size(), &coords[0], GL_STATIC_DRAW); | |
| 325 | |
| 326 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); | |
| 327 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * miterDirections.size(), &miterDirections[0], GL_STATIC_DRAW); | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 | |
| 332 OpenGLLinesProgram::Data::~Data() | |
| 333 { | |
| 334 if (!IsEmpty()) | |
| 335 { | |
| 336 context_.MakeCurrent(); | |
| 337 glDeleteBuffers(2, buffers_); | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 | |
| 342 GLuint OpenGLLinesProgram::Data::GetVerticesBuffer() const | |
| 343 { | |
| 344 if (IsEmpty()) | |
| 345 { | |
| 346 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 347 } | |
| 348 else | |
| 349 { | |
| 350 return buffers_[0]; | |
| 351 } | |
| 352 } | |
| 353 | |
| 354 | |
| 355 GLuint OpenGLLinesProgram::Data::GetMiterDirectionsBuffer() const | |
| 356 { | |
| 357 if (IsEmpty()) | |
| 358 { | |
| 359 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 360 } | |
| 361 else | |
| 362 { | |
| 363 return buffers_[1]; | |
| 364 } | |
| 365 } | |
| 366 | |
| 367 | |
| 368 OpenGLLinesProgram::OpenGLLinesProgram(OpenGL::IOpenGLContext& context) : | |
| 369 context_(context) | |
| 370 { | |
| 371 | |
| 372 context_.MakeCurrent(); | |
| 373 | |
| 374 program_.reset(new OpenGL::OpenGLProgram); | |
| 375 program_->CompileShaders(VERTEX_SHADER, FRAGMENT_SHADER); | |
| 376 } | |
| 377 | |
| 378 | |
| 379 void OpenGLLinesProgram::Apply(const Data& data, | |
| 380 const AffineTransform2D& transform, | |
| 381 bool antialiasing, | |
| 382 bool scaleIndependantThickness) | |
| 383 { | |
| 384 if (!data.IsEmpty()) | |
| 385 { | |
| 386 context_.MakeCurrent(); | |
| 387 program_->Use(); | |
| 388 | |
| 389 GLint locationPosition = program_->GetAttributeLocation("a_position"); | |
| 390 GLint locationMiterDirection = program_->GetAttributeLocation("a_miter_direction"); | |
| 391 | |
| 392 float m[16]; | |
| 393 transform.ConvertToOpenGLMatrix(m, context_.GetCanvasWidth(), context_.GetCanvasHeight()); | |
| 394 | |
| 395 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m); | |
| 396 glUniform3f(program_->GetUniformLocation("u_color"), | |
| 397 data.GetRed(), data.GetGreen(), data.GetBlue()); | |
| 398 | |
| 399 glBindBuffer(GL_ARRAY_BUFFER, data.GetVerticesBuffer()); | |
| 400 glEnableVertexAttribArray(locationPosition); | |
| 401 glVertexAttribPointer(locationPosition, COMPONENTS_POSITION, GL_FLOAT, GL_FALSE, 0, 0); | |
| 402 | |
| 403 glBindBuffer(GL_ARRAY_BUFFER, data.GetMiterDirectionsBuffer()); | |
| 404 glEnableVertexAttribArray(locationMiterDirection); | |
| 405 glVertexAttribPointer(locationMiterDirection, COMPONENTS_MITER, GL_FLOAT, GL_FALSE, 0, 0); | |
| 406 | |
| 407 glUniform1i(program_->GetUniformLocation("u_antialiasing"), (antialiasing ? 1 : 0)); | |
| 408 | |
| 409 const double zoom = transform.ComputeZoom(); | |
| 410 const double thickness = data.GetThickness() / 2.0; | |
| 411 const double aliasingBorder = 2.0; // Border for antialiasing ramp, in pixels | |
| 412 assert(aliasingBorder > 0); // Prevent division by zero with "t1" | |
| 413 | |
| 414 if (scaleIndependantThickness) | |
| 415 { | |
| 416 if (antialiasing) | |
| 417 { | |
| 418 double t1 = std::max(thickness, aliasingBorder); | |
| 419 double t0 = std::max(0.0, thickness - aliasingBorder); | |
| 420 | |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
421 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
|
422 static_cast<GLfloat>(t1 / zoom)); |
|
698
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
423 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
|
424 static_cast<GLfloat>(t0 / t1)); |
| 592 | 425 } |
| 426 else | |
| 427 { | |
|
698
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
428 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
|
429 static_cast<GLfloat>(thickness / zoom)); |
| 592 | 430 } |
| 431 } | |
| 432 else | |
| 433 { | |
| 434 if (antialiasing) | |
| 435 { | |
| 436 double t1 = std::max(thickness, aliasingBorder / zoom); | |
| 437 double t0 = std::max(0.0, thickness - aliasingBorder / zoom); | |
| 438 | |
|
698
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
439 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
|
440 static_cast<GLfloat>(t1)); |
|
698
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
441 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
|
442 static_cast<GLfloat>(t0 / t1)); |
| 592 | 443 } |
| 444 else | |
| 445 { | |
|
698
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
446 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
|
447 static_cast<GLfloat>(thickness)); |
| 592 | 448 } |
| 449 } | |
| 450 | |
| 451 if (antialiasing) | |
| 452 { | |
| 453 glEnable(GL_BLEND); | |
| 454 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); | |
|
698
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
455 glDrawArrays(GL_TRIANGLES, 0, |
|
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
456 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 457 glDisable(GL_BLEND); |
| 458 } | |
| 459 else | |
| 460 { | |
|
698
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
461 glDrawArrays(GL_TRIANGLES, 0, |
|
8b6adfb62a2f
Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
462 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 463 } |
| 464 | |
| 465 glDisableVertexAttribArray(locationPosition); | |
| 466 glDisableVertexAttribArray(locationMiterDirection); | |
| 467 } | |
| 468 } | |
| 469 } | |
| 470 } |