Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/OpenGLLinesProgram.cpp @ 1870:3889ae96d2e9
added copyright UCLouvain
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 11 Jan 2022 11:04:09 +0100 |
| parents | 9ac2a65d4172 |
| children | 7053b8a0aaec |
| 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 | |
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 592 | 7 * |
| 8 * This program is free software: you can redistribute it and/or | |
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9 * modify it under the terms of the GNU Lesser General Public License |
| 592 | 10 * as published by the Free Software Foundation, either version 3 of |
| 11 * the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
|
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Lesser General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
| 592 | 21 **/ |
| 22 | |
| 23 | |
| 24 #include "OpenGLLinesProgram.h" | |
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25 #include "OpenGLShaderVersionDirective.h" |
| 592 | 26 |
| 1624 | 27 #include <Logging.h> |
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28 #include <OrthancException.h> |
| 592 | 29 |
| 30 | |
| 31 static const unsigned int COMPONENTS_POSITION = 3; | |
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32 static const unsigned int COMPONENTS_COLOR = 3; |
| 592 | 33 static const unsigned int COMPONENTS_MITER = 2; |
| 34 | |
| 35 | |
| 36 static const char* VERTEX_SHADER = | |
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37 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 38 "attribute vec2 a_miter_direction; \n" |
| 39 "attribute vec4 a_position; \n" | |
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40 "attribute vec3 a_color; \n" |
| 592 | 41 "uniform float u_thickness; \n" |
| 42 "uniform mat4 u_matrix; \n" | |
| 43 "varying float v_distance; \n" | |
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44 "varying vec3 v_color; \n" |
| 592 | 45 "void main() \n" |
| 46 "{ \n" | |
| 47 " v_distance = a_position.z; \n" | |
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48 " v_color = a_color; \n" |
| 592 | 49 " gl_Position = u_matrix * vec4(a_position.xy + a_position.z * a_miter_direction * u_thickness, 0, 1); \n" |
| 50 "}"; | |
| 51 | |
| 52 | |
| 53 static const char* FRAGMENT_SHADER = | |
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54 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 55 "uniform bool u_antialiasing; \n" |
| 56 "uniform float u_antialiasing_start; \n" | |
| 57 "varying float v_distance; \n" // Distance of the point to the segment | |
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58 "varying vec3 v_color; \n" |
| 592 | 59 "void main() \n" |
| 60 "{ \n" | |
| 61 " float d = abs(v_distance); \n" | |
| 62 " if (!u_antialiasing || \n" | |
| 63 " d <= u_antialiasing_start) \n" | |
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64 " gl_FragColor = vec4(v_color, 1); \n" |
| 592 | 65 " else if (d >= 1.0) \n" |
| 66 " gl_FragColor = vec4(0, 0, 0, 0); \n" | |
| 67 " else \n" | |
| 68 " { \n" | |
| 69 " float alpha = 1.0 - smoothstep(u_antialiasing_start, 1.0, d); \n" | |
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70 " gl_FragColor = vec4(v_color * alpha, alpha); \n" |
| 592 | 71 " } \n" |
| 72 "}"; | |
| 73 | |
| 74 | |
| 75 namespace OrthancStone | |
| 76 { | |
| 77 namespace Internals | |
| 78 { | |
| 79 class OpenGLLinesProgram::Data::Segment | |
| 80 { | |
| 81 private: | |
| 82 bool isEmpty_; | |
| 83 double x1_; | |
| 84 double y1_; | |
| 85 double x2_; | |
| 86 double y2_; | |
| 87 double miterX1_; | |
| 88 double miterY1_; | |
| 89 double miterX2_; | |
| 90 double miterY2_; | |
| 91 | |
| 92 Vector lineAbove_; // In homogeneous coordinates (size = 3) | |
| 93 Vector lineBelow_; | |
| 94 | |
| 95 public: | |
| 96 Segment(const PolylineSceneLayer::Chain& chain, | |
| 97 size_t index1, | |
| 98 size_t index2) : | |
| 99 isEmpty_(false) | |
| 100 { | |
| 101 if (index1 >= chain.size() || | |
| 102 index2 >= chain.size()) | |
| 103 { | |
| 104 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 105 } | |
| 106 else | |
| 107 { | |
| 108 const ScenePoint2D& p = chain[index1]; | |
| 109 const ScenePoint2D& q = chain[index2]; | |
| 110 | |
| 111 x1_ = p.GetX(); | |
| 112 y1_ = p.GetY(); | |
| 113 x2_ = q.GetX(); | |
| 114 y2_ = q.GetY(); | |
| 115 | |
| 116 const double dx = x2_ - x1_; | |
| 117 const double dy = y2_ - y1_; | |
| 118 const double norm = sqrt(dx * dx + dy * dy); | |
| 119 | |
| 120 if (LinearAlgebra::IsCloseToZero(norm)) | |
| 121 { | |
| 122 isEmpty_ = true; | |
| 123 } | |
| 124 else | |
| 125 { | |
| 126 isEmpty_ = false; | |
| 127 const double normalX = -dy / norm; | |
| 128 const double normalY = dx / norm; | |
| 129 | |
| 130 miterX1_ = normalX; | |
| 131 miterY1_ = normalY; | |
| 132 miterX2_ = normalX; | |
| 133 miterY2_ = normalY; | |
| 134 | |
| 135 Vector a = LinearAlgebra::CreateVector(x1_ + normalX, y1_ + normalY, 1); | |
| 136 Vector b = LinearAlgebra::CreateVector(x2_ + normalX, y2_ + normalY, 1); | |
| 137 LinearAlgebra::CrossProduct(lineAbove_, a, b); | |
| 138 | |
| 139 a = LinearAlgebra::CreateVector(x1_ - normalX, y1_ - normalY, 1); | |
| 140 b = LinearAlgebra::CreateVector(x2_ - normalX, y2_ - normalY, 1); | |
| 141 LinearAlgebra::CrossProduct(lineBelow_, a, b); | |
| 142 } | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 bool IsEmpty() const | |
| 147 { | |
| 148 return isEmpty_; | |
| 149 } | |
| 150 | |
| 151 static double ComputeSignedArea(double x1, | |
| 152 double y1, | |
| 153 double x2, | |
| 154 double y2, | |
| 155 double x3, | |
| 156 double y3) | |
| 157 { | |
| 158 // This computes the signed area of a 2D triangle. This | |
| 159 // formula is e.g. used in the sorting algorithm of Graham's | |
| 160 // scan to compute the convex hull. | |
| 161 // https://en.wikipedia.org/wiki/Graham_scan | |
| 162 return (x2 - x1) * (y3 - y1) - (y2 - y1) * (x3 - x1); | |
| 163 } | |
| 164 | |
| 165 static void CreateMiter(Segment& left, | |
| 166 Segment& right) | |
| 167 { | |
| 168 if (!left.IsEmpty() && | |
| 169 !right.IsEmpty()) | |
| 170 { | |
| 171 Vector above, below; | |
| 172 LinearAlgebra::CrossProduct(above, left.lineAbove_, right.lineAbove_); | |
| 173 LinearAlgebra::CrossProduct(below, left.lineBelow_, right.lineBelow_); | |
| 174 | |
| 175 if (!LinearAlgebra::IsCloseToZero(above[2]) && | |
| 176 !LinearAlgebra::IsCloseToZero(below[2])) | |
| 177 { | |
| 178 // Back to inhomogeneous 2D coordinates | |
| 179 above /= above[2]; | |
| 180 below /= below[2]; | |
| 181 | |
| 182 // Check whether "above" and "below" intersection points | |
| 183 // are on the half-plane defined by the endpoints of the | |
| 184 // two segments. This is an indicator of whether the angle | |
| 185 // is too acute. | |
| 186 double s1 = ComputeSignedArea(left.x1_, left.y1_, | |
| 187 above[0], above[1], | |
| 188 right.x2_, right.y2_); | |
| 189 double s2 = ComputeSignedArea(left.x1_, left.y1_, | |
| 190 below[0], below[1], | |
| 191 right.x2_, right.y2_); | |
| 192 | |
| 193 // The two signed areas must have the same sign | |
| 194 if (s1 * s2 >= 0) | |
| 195 { | |
| 196 left.miterX2_ = above[0] - left.x2_; | |
| 197 left.miterY2_ = above[1] - left.y2_; | |
| 198 | |
| 199 right.miterX1_ = left.miterX2_; | |
| 200 right.miterY1_ = left.miterY2_; | |
| 201 } | |
| 202 } | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 void AddTriangles(std::vector<float>& coords, | |
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207 std::vector<float>& miterDirections, |
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208 std::vector<float>& colors, |
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209 const Color& color) |
| 592 | 210 { |
| 211 if (isEmpty_) | |
| 212 { | |
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213 LOG(ERROR) << "OpenGLLinesProgram -- AddTriangles: (isEmpty_)"; |
| 592 | 214 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 215 } | |
| 216 | |
| 217 // First triangle | |
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218 coords.push_back(static_cast<float>(x1_)); |
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219 coords.push_back(static_cast<float>(y1_)); |
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220 coords.push_back(static_cast<float>(1)); |
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221 coords.push_back(static_cast<float>(x2_)); |
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222 coords.push_back(static_cast<float>(y2_)); |
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223 coords.push_back(static_cast<float>(-1)); |
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224 coords.push_back(static_cast<float>(x2_)); |
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225 coords.push_back(static_cast<float>(y2_)); |
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226 coords.push_back(static_cast<float>(1)); |
| 592 | 227 |
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228 miterDirections.push_back(static_cast<float>(miterX1_)); |
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229 miterDirections.push_back(static_cast<float>(miterY1_)); |
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230 miterDirections.push_back(static_cast<float>(miterX2_)); |
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231 miterDirections.push_back(static_cast<float>(miterY2_)); |
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232 miterDirections.push_back(static_cast<float>(miterX2_)); |
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233 miterDirections.push_back(static_cast<float>(miterY2_)); |
| 592 | 234 |
| 235 // Second triangle | |
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236 coords.push_back(static_cast<float>(x1_)); |
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237 coords.push_back(static_cast<float>(y1_)); |
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238 coords.push_back(static_cast<float>(1)); |
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239 coords.push_back(static_cast<float>(x1_)); |
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240 coords.push_back(static_cast<float>(y1_)); |
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241 coords.push_back(static_cast<float>(-1)); |
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242 coords.push_back(static_cast<float>(x2_)); |
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243 coords.push_back(static_cast<float>(y2_)); |
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244 coords.push_back(static_cast<float>(-1)); |
| 592 | 245 |
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246 miterDirections.push_back(static_cast<float>(miterX1_)); |
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247 miterDirections.push_back(static_cast<float>(miterY1_)); |
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248 miterDirections.push_back(static_cast<float>(miterX1_)); |
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249 miterDirections.push_back(static_cast<float>(miterY1_)); |
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250 miterDirections.push_back(static_cast<float>(miterX2_)); |
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251 miterDirections.push_back(static_cast<float>(miterY2_)); |
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252 |
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253 // Add the colors of the 2 triangles (leading to 2 * 3 values) |
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254 for (unsigned int i = 0; i < 6; i++) |
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255 { |
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256 colors.push_back(color.GetRedAsFloat()); |
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257 colors.push_back(color.GetGreenAsFloat()); |
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258 colors.push_back(color.GetBlueAsFloat()); |
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259 } |
| 592 | 260 } |
| 261 }; | |
| 262 | |
| 263 | |
| 264 OpenGLLinesProgram::Data::Data(OpenGL::IOpenGLContext& context, | |
| 265 const PolylineSceneLayer& layer) : | |
| 266 context_(context), | |
| 267 verticesCount_(0), | |
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268 thickness_(static_cast<float>(layer.GetThickness())) |
| 592 | 269 { |
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270 if (!context_.IsContextLost()) |
| 592 | 271 { |
|
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272 // High-level reference: |
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273 // https://mattdesl.svbtle.com/drawing-lines-is-hard |
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274 // https://forum.libcinder.org/topic/smooth-thick-lines-using-geometry-shader |
| 592 | 275 |
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276 size_t countVertices = 0; |
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277 for (size_t i = 0; i < layer.GetChainsCount(); i++) |
| 592 | 278 { |
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279 size_t countSegments = layer.GetChain(i).size() - 1; |
| 592 | 280 |
| 281 if (layer.IsClosedChain(i)) | |
| 282 { | |
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283 countSegments++; |
| 592 | 284 } |
| 285 | |
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286 // Each segment is made of 2 triangles. One triangle is |
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287 // defined by 3 points in 2D => 6 vertices per segment. |
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288 countVertices += countSegments * 2 * 3; |
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289 } |
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290 |
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291 std::vector<float> coords, colors, miterDirections; |
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292 coords.reserve(countVertices * COMPONENTS_POSITION); |
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293 colors.reserve(countVertices * COMPONENTS_COLOR); |
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294 miterDirections.reserve(countVertices * COMPONENTS_MITER); |
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295 |
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296 for (size_t i = 0; i < layer.GetChainsCount(); i++) |
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297 { |
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298 const PolylineSceneLayer::Chain& chain = layer.GetChain(i); |
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299 |
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300 if (chain.size() > 1) |
| 592 | 301 { |
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302 std::vector<Segment> segments; |
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303 for (size_t j = 1; j < chain.size(); j++) |
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304 { |
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305 segments.push_back(Segment(chain, j - 1, j)); |
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306 } |
| 592 | 307 |
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308 if (layer.IsClosedChain(i)) |
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309 { |
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310 segments.push_back(Segment(chain, chain.size() - 1, 0)); |
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311 } |
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312 |
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313 // Try and create nice miters |
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314 for (size_t j = 1; j < segments.size(); j++) |
| 592 | 315 { |
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316 Segment::CreateMiter(segments[j - 1], segments[j]); |
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317 } |
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318 |
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319 if (layer.IsClosedChain(i)) |
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320 { |
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321 Segment::CreateMiter(segments.back(), segments.front()); |
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322 } |
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323 |
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324 for (size_t j = 0; j < segments.size(); j++) |
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325 { |
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326 if (!segments[j].IsEmpty()) |
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327 { |
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328 segments[j].AddTriangles(coords, miterDirections, colors, layer.GetColor(i)); |
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329 } |
| 592 | 330 } |
| 331 } | |
| 332 } | |
| 333 | |
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334 assert(coords.size() == colors.size()); |
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335 |
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336 if (!coords.empty()) |
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337 { |
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338 verticesCount_ = coords.size() / COMPONENTS_POSITION; |
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339 |
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340 context_.MakeCurrent(); |
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341 glGenBuffers(3, buffers_); |
| 592 | 342 |
|
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343 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); |
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344 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * coords.size(), &coords[0], GL_STATIC_DRAW); |
| 592 | 345 |
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346 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); |
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347 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * miterDirections.size(), &miterDirections[0], GL_STATIC_DRAW); |
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348 |
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349 glBindBuffer(GL_ARRAY_BUFFER, buffers_[2]); |
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350 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * colors.size(), &colors[0], GL_STATIC_DRAW); |
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351 } |
| 592 | 352 } |
| 353 } | |
| 354 | |
| 355 | |
| 356 OpenGLLinesProgram::Data::~Data() | |
| 357 { | |
|
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358 if (!context_.IsContextLost() && !IsEmpty()) |
| 592 | 359 { |
| 360 context_.MakeCurrent(); | |
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361 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteBuffers"); |
|
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362 glDeleteBuffers(3, buffers_); |
| 592 | 363 } |
| 364 } | |
| 365 | |
| 366 GLuint OpenGLLinesProgram::Data::GetVerticesBuffer() const | |
| 367 { | |
| 368 if (IsEmpty()) | |
| 369 { | |
|
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370 LOG(ERROR) << "OpenGLLinesProgram::Data::GetVerticesBuffer(): (IsEmpty())"; |
| 592 | 371 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 372 } | |
| 373 else | |
| 374 { | |
| 375 return buffers_[0]; | |
| 376 } | |
| 377 } | |
| 378 | |
| 379 | |
| 380 GLuint OpenGLLinesProgram::Data::GetMiterDirectionsBuffer() const | |
| 381 { | |
| 382 if (IsEmpty()) | |
| 383 { | |
|
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384 LOG(ERROR) << "OpenGLLinesProgram::Data::GetMiterDirectionsBuffer(): (IsEmpty())"; |
| 592 | 385 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 386 } | |
| 387 else | |
| 388 { | |
| 389 return buffers_[1]; | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 | |
|
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394 GLuint OpenGLLinesProgram::Data::GetColorsBuffer() const |
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395 { |
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396 if (IsEmpty()) |
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397 { |
|
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|
398 LOG(ERROR) << "OpenGLLinesProgram::Data::GetColorsBuffer(): (IsEmpty())"; |
|
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399 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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400 } |
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401 else |
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402 { |
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403 return buffers_[2]; |
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|
404 } |
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|
405 } |
|
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|
406 |
|
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|
407 |
| 592 | 408 OpenGLLinesProgram::OpenGLLinesProgram(OpenGL::IOpenGLContext& context) : |
| 409 context_(context) | |
| 410 { | |
|
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|
411 if (!context_.IsContextLost()) |
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|
412 { |
|
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|
413 context_.MakeCurrent(); |
|
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|
414 program_.reset(new OpenGL::OpenGLProgram(context_)); |
|
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|
415 program_->CompileShaders(VERTEX_SHADER, FRAGMENT_SHADER); |
|
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|
416 } |
| 592 | 417 } |
| 418 | |
| 419 void OpenGLLinesProgram::Apply(const Data& data, | |
| 420 const AffineTransform2D& transform, | |
|
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|
421 unsigned int canvasWidth, |
|
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sanitizing the handling of canvas size
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|
422 unsigned int canvasHeight, |
| 592 | 423 bool antialiasing, |
| 424 bool scaleIndependantThickness) | |
| 425 { | |
|
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|
426 if (!context_.IsContextLost() && !data.IsEmpty()) |
| 592 | 427 { |
| 428 context_.MakeCurrent(); | |
| 429 program_->Use(); | |
| 430 | |
| 431 GLint locationPosition = program_->GetAttributeLocation("a_position"); | |
| 432 GLint locationMiterDirection = program_->GetAttributeLocation("a_miter_direction"); | |
|
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PolylineSceneLayer now has one color per chain
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changeset
|
433 GLint locationColor = program_->GetAttributeLocation("a_color"); |
| 592 | 434 |
| 435 float m[16]; | |
|
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diff
changeset
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436 transform.ConvertToOpenGLMatrix(m, canvasWidth, canvasHeight); |
| 592 | 437 |
| 438 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m); | |
| 439 | |
| 440 glBindBuffer(GL_ARRAY_BUFFER, data.GetVerticesBuffer()); | |
| 441 glEnableVertexAttribArray(locationPosition); | |
| 442 glVertexAttribPointer(locationPosition, COMPONENTS_POSITION, GL_FLOAT, GL_FALSE, 0, 0); | |
| 443 | |
| 444 glBindBuffer(GL_ARRAY_BUFFER, data.GetMiterDirectionsBuffer()); | |
| 445 glEnableVertexAttribArray(locationMiterDirection); | |
| 446 glVertexAttribPointer(locationMiterDirection, COMPONENTS_MITER, GL_FLOAT, GL_FALSE, 0, 0); | |
| 447 | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
448 glBindBuffer(GL_ARRAY_BUFFER, data.GetColorsBuffer()); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
449 glEnableVertexAttribArray(locationColor); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
450 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
|
451 |
| 592 | 452 glUniform1i(program_->GetUniformLocation("u_antialiasing"), (antialiasing ? 1 : 0)); |
| 453 | |
| 454 const double zoom = transform.ComputeZoom(); | |
| 455 const double thickness = data.GetThickness() / 2.0; | |
| 456 const double aliasingBorder = 2.0; // Border for antialiasing ramp, in pixels | |
| 457 assert(aliasingBorder > 0); // Prevent division by zero with "t1" | |
| 458 | |
| 459 if (scaleIndependantThickness) | |
| 460 { | |
| 461 if (antialiasing) | |
| 462 { | |
| 463 double t1 = std::max(thickness, aliasingBorder); | |
| 464 double t0 = std::max(0.0, thickness - aliasingBorder); | |
| 465 | |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
466 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
|
467 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
|
468 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
|
469 static_cast<GLfloat>(t0 / t1)); |
| 592 | 470 } |
| 471 else | |
| 472 { | |
|
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_thickness"), |
|
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>(thickness / zoom)); |
| 592 | 475 } |
| 476 } | |
| 477 else | |
| 478 { | |
| 479 if (antialiasing) | |
| 480 { | |
| 481 double t1 = std::max(thickness, aliasingBorder / zoom); | |
| 482 double t0 = std::max(0.0, thickness - aliasingBorder / zoom); | |
| 483 | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
484 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
|
485 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
|
486 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
|
487 static_cast<GLfloat>(t0 / t1)); |
| 592 | 488 } |
| 489 else | |
| 490 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
491 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
|
492 static_cast<GLfloat>(thickness)); |
| 592 | 493 } |
| 494 } | |
| 495 | |
| 496 if (antialiasing) | |
| 497 { | |
| 498 glEnable(GL_BLEND); | |
| 499 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
|
500 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
|
501 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 502 glDisable(GL_BLEND); |
| 503 } | |
| 504 else | |
| 505 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
506 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
|
507 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 508 } |
| 509 | |
| 510 glDisableVertexAttribArray(locationPosition); | |
| 511 glDisableVertexAttribArray(locationMiterDirection); | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
512 glDisableVertexAttribArray(locationColor); |
| 592 | 513 } |
| 514 } | |
| 515 } | |
| 516 } |