Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/OpenGLLinesProgram.cpp @ 1640:52b8b96cb55f
cleaning namespaces
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 10 Nov 2020 16:55:22 +0100 |
| parents | 59f95b9ea858 |
| children | 9ac2a65d4172 |
| 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) 2017-2020 Osimis S.A., Belgium |
| 592 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
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8 * modify it under the terms of the GNU Lesser General Public License |
| 592 | 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 | |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
| 592 | 20 **/ |
| 21 | |
| 22 | |
| 23 #include "OpenGLLinesProgram.h" | |
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24 #include "OpenGLShaderVersionDirective.h" |
| 592 | 25 |
| 1624 | 26 #include <Logging.h> |
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27 #include <OrthancException.h> |
| 592 | 28 |
| 29 | |
| 30 static const unsigned int COMPONENTS_POSITION = 3; | |
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31 static const unsigned int COMPONENTS_COLOR = 3; |
| 592 | 32 static const unsigned int COMPONENTS_MITER = 2; |
| 33 | |
| 34 | |
| 35 static const char* VERTEX_SHADER = | |
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36 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 37 "attribute vec2 a_miter_direction; \n" |
| 38 "attribute vec4 a_position; \n" | |
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39 "attribute vec3 a_color; \n" |
| 592 | 40 "uniform float u_thickness; \n" |
| 41 "uniform mat4 u_matrix; \n" | |
| 42 "varying float v_distance; \n" | |
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43 "varying vec3 v_color; \n" |
| 592 | 44 "void main() \n" |
| 45 "{ \n" | |
| 46 " v_distance = a_position.z; \n" | |
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47 " v_color = a_color; \n" |
| 592 | 48 " gl_Position = u_matrix * vec4(a_position.xy + a_position.z * a_miter_direction * u_thickness, 0, 1); \n" |
| 49 "}"; | |
| 50 | |
| 51 | |
| 52 static const char* FRAGMENT_SHADER = | |
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53 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 54 "uniform bool u_antialiasing; \n" |
| 55 "uniform float u_antialiasing_start; \n" | |
| 56 "varying float v_distance; \n" // Distance of the point to the segment | |
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57 "varying vec3 v_color; \n" |
| 592 | 58 "void main() \n" |
| 59 "{ \n" | |
| 60 " float d = abs(v_distance); \n" | |
| 61 " if (!u_antialiasing || \n" | |
| 62 " d <= u_antialiasing_start) \n" | |
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63 " gl_FragColor = vec4(v_color, 1); \n" |
| 592 | 64 " else if (d >= 1.0) \n" |
| 65 " gl_FragColor = vec4(0, 0, 0, 0); \n" | |
| 66 " else \n" | |
| 67 " { \n" | |
| 68 " float alpha = 1.0 - smoothstep(u_antialiasing_start, 1.0, d); \n" | |
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69 " gl_FragColor = vec4(v_color * alpha, alpha); \n" |
| 592 | 70 " } \n" |
| 71 "}"; | |
| 72 | |
| 73 | |
| 74 namespace OrthancStone | |
| 75 { | |
| 76 namespace Internals | |
| 77 { | |
| 78 class OpenGLLinesProgram::Data::Segment | |
| 79 { | |
| 80 private: | |
| 81 bool isEmpty_; | |
| 82 double x1_; | |
| 83 double y1_; | |
| 84 double x2_; | |
| 85 double y2_; | |
| 86 double miterX1_; | |
| 87 double miterY1_; | |
| 88 double miterX2_; | |
| 89 double miterY2_; | |
| 90 | |
| 91 Vector lineAbove_; // In homogeneous coordinates (size = 3) | |
| 92 Vector lineBelow_; | |
| 93 | |
| 94 public: | |
| 95 Segment(const PolylineSceneLayer::Chain& chain, | |
| 96 size_t index1, | |
| 97 size_t index2) : | |
| 98 isEmpty_(false) | |
| 99 { | |
| 100 if (index1 >= chain.size() || | |
| 101 index2 >= chain.size()) | |
| 102 { | |
| 103 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 104 } | |
| 105 else | |
| 106 { | |
| 107 const ScenePoint2D& p = chain[index1]; | |
| 108 const ScenePoint2D& q = chain[index2]; | |
| 109 | |
| 110 x1_ = p.GetX(); | |
| 111 y1_ = p.GetY(); | |
| 112 x2_ = q.GetX(); | |
| 113 y2_ = q.GetY(); | |
| 114 | |
| 115 const double dx = x2_ - x1_; | |
| 116 const double dy = y2_ - y1_; | |
| 117 const double norm = sqrt(dx * dx + dy * dy); | |
| 118 | |
| 119 if (LinearAlgebra::IsCloseToZero(norm)) | |
| 120 { | |
| 121 isEmpty_ = true; | |
| 122 } | |
| 123 else | |
| 124 { | |
| 125 isEmpty_ = false; | |
| 126 const double normalX = -dy / norm; | |
| 127 const double normalY = dx / norm; | |
| 128 | |
| 129 miterX1_ = normalX; | |
| 130 miterY1_ = normalY; | |
| 131 miterX2_ = normalX; | |
| 132 miterY2_ = normalY; | |
| 133 | |
| 134 Vector a = LinearAlgebra::CreateVector(x1_ + normalX, y1_ + normalY, 1); | |
| 135 Vector b = LinearAlgebra::CreateVector(x2_ + normalX, y2_ + normalY, 1); | |
| 136 LinearAlgebra::CrossProduct(lineAbove_, a, b); | |
| 137 | |
| 138 a = LinearAlgebra::CreateVector(x1_ - normalX, y1_ - normalY, 1); | |
| 139 b = LinearAlgebra::CreateVector(x2_ - normalX, y2_ - normalY, 1); | |
| 140 LinearAlgebra::CrossProduct(lineBelow_, a, b); | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 bool IsEmpty() const | |
| 146 { | |
| 147 return isEmpty_; | |
| 148 } | |
| 149 | |
| 150 static double ComputeSignedArea(double x1, | |
| 151 double y1, | |
| 152 double x2, | |
| 153 double y2, | |
| 154 double x3, | |
| 155 double y3) | |
| 156 { | |
| 157 // This computes the signed area of a 2D triangle. This | |
| 158 // formula is e.g. used in the sorting algorithm of Graham's | |
| 159 // scan to compute the convex hull. | |
| 160 // https://en.wikipedia.org/wiki/Graham_scan | |
| 161 return (x2 - x1) * (y3 - y1) - (y2 - y1) * (x3 - x1); | |
| 162 } | |
| 163 | |
| 164 static void CreateMiter(Segment& left, | |
| 165 Segment& right) | |
| 166 { | |
| 167 if (!left.IsEmpty() && | |
| 168 !right.IsEmpty()) | |
| 169 { | |
| 170 Vector above, below; | |
| 171 LinearAlgebra::CrossProduct(above, left.lineAbove_, right.lineAbove_); | |
| 172 LinearAlgebra::CrossProduct(below, left.lineBelow_, right.lineBelow_); | |
| 173 | |
| 174 if (!LinearAlgebra::IsCloseToZero(above[2]) && | |
| 175 !LinearAlgebra::IsCloseToZero(below[2])) | |
| 176 { | |
| 177 // Back to inhomogeneous 2D coordinates | |
| 178 above /= above[2]; | |
| 179 below /= below[2]; | |
| 180 | |
| 181 // Check whether "above" and "below" intersection points | |
| 182 // are on the half-plane defined by the endpoints of the | |
| 183 // two segments. This is an indicator of whether the angle | |
| 184 // is too acute. | |
| 185 double s1 = ComputeSignedArea(left.x1_, left.y1_, | |
| 186 above[0], above[1], | |
| 187 right.x2_, right.y2_); | |
| 188 double s2 = ComputeSignedArea(left.x1_, left.y1_, | |
| 189 below[0], below[1], | |
| 190 right.x2_, right.y2_); | |
| 191 | |
| 192 // The two signed areas must have the same sign | |
| 193 if (s1 * s2 >= 0) | |
| 194 { | |
| 195 left.miterX2_ = above[0] - left.x2_; | |
| 196 left.miterY2_ = above[1] - left.y2_; | |
| 197 | |
| 198 right.miterX1_ = left.miterX2_; | |
| 199 right.miterY1_ = left.miterY2_; | |
| 200 } | |
| 201 } | |
| 202 } | |
| 203 } | |
| 204 | |
| 205 void AddTriangles(std::vector<float>& coords, | |
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206 std::vector<float>& miterDirections, |
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207 std::vector<float>& colors, |
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208 const Color& color) |
| 592 | 209 { |
| 210 if (isEmpty_) | |
| 211 { | |
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212 LOG(ERROR) << "OpenGLLinesProgram -- AddTriangles: (isEmpty_)"; |
| 592 | 213 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 214 } | |
| 215 | |
| 216 // First triangle | |
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217 coords.push_back(static_cast<float>(x1_)); |
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218 coords.push_back(static_cast<float>(y1_)); |
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219 coords.push_back(static_cast<float>(1)); |
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220 coords.push_back(static_cast<float>(x2_)); |
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221 coords.push_back(static_cast<float>(y2_)); |
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222 coords.push_back(static_cast<float>(-1)); |
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223 coords.push_back(static_cast<float>(x2_)); |
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224 coords.push_back(static_cast<float>(y2_)); |
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225 coords.push_back(static_cast<float>(1)); |
| 592 | 226 |
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227 miterDirections.push_back(static_cast<float>(miterX1_)); |
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228 miterDirections.push_back(static_cast<float>(miterY1_)); |
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229 miterDirections.push_back(static_cast<float>(miterX2_)); |
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230 miterDirections.push_back(static_cast<float>(miterY2_)); |
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231 miterDirections.push_back(static_cast<float>(miterX2_)); |
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232 miterDirections.push_back(static_cast<float>(miterY2_)); |
| 592 | 233 |
| 234 // Second triangle | |
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235 coords.push_back(static_cast<float>(x1_)); |
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236 coords.push_back(static_cast<float>(y1_)); |
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237 coords.push_back(static_cast<float>(1)); |
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238 coords.push_back(static_cast<float>(x1_)); |
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239 coords.push_back(static_cast<float>(y1_)); |
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240 coords.push_back(static_cast<float>(-1)); |
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241 coords.push_back(static_cast<float>(x2_)); |
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242 coords.push_back(static_cast<float>(y2_)); |
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243 coords.push_back(static_cast<float>(-1)); |
| 592 | 244 |
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245 miterDirections.push_back(static_cast<float>(miterX1_)); |
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246 miterDirections.push_back(static_cast<float>(miterY1_)); |
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247 miterDirections.push_back(static_cast<float>(miterX1_)); |
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248 miterDirections.push_back(static_cast<float>(miterY1_)); |
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249 miterDirections.push_back(static_cast<float>(miterX2_)); |
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250 miterDirections.push_back(static_cast<float>(miterY2_)); |
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251 |
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252 // Add the colors of the 2 triangles (leading to 2 * 3 values) |
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253 for (unsigned int i = 0; i < 6; i++) |
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254 { |
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255 colors.push_back(color.GetRedAsFloat()); |
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256 colors.push_back(color.GetGreenAsFloat()); |
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257 colors.push_back(color.GetBlueAsFloat()); |
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258 } |
| 592 | 259 } |
| 260 }; | |
| 261 | |
| 262 | |
| 263 OpenGLLinesProgram::Data::Data(OpenGL::IOpenGLContext& context, | |
| 264 const PolylineSceneLayer& layer) : | |
| 265 context_(context), | |
| 266 verticesCount_(0), | |
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267 thickness_(static_cast<float>(layer.GetThickness())) |
| 592 | 268 { |
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269 if (!context_.IsContextLost()) |
| 592 | 270 { |
|
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271 // High-level reference: |
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272 // https://mattdesl.svbtle.com/drawing-lines-is-hard |
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273 // https://forum.libcinder.org/topic/smooth-thick-lines-using-geometry-shader |
| 592 | 274 |
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275 size_t countVertices = 0; |
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276 for (size_t i = 0; i < layer.GetChainsCount(); i++) |
| 592 | 277 { |
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278 size_t countSegments = layer.GetChain(i).size() - 1; |
| 592 | 279 |
| 280 if (layer.IsClosedChain(i)) | |
| 281 { | |
|
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282 countSegments++; |
| 592 | 283 } |
| 284 | |
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285 // Each segment is made of 2 triangles. One triangle is |
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286 // defined by 3 points in 2D => 6 vertices per segment. |
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287 countVertices += countSegments * 2 * 3; |
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288 } |
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289 |
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290 std::vector<float> coords, colors, miterDirections; |
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291 coords.reserve(countVertices * COMPONENTS_POSITION); |
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292 colors.reserve(countVertices * COMPONENTS_COLOR); |
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293 miterDirections.reserve(countVertices * COMPONENTS_MITER); |
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294 |
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295 for (size_t i = 0; i < layer.GetChainsCount(); i++) |
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296 { |
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297 const PolylineSceneLayer::Chain& chain = layer.GetChain(i); |
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298 |
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299 if (chain.size() > 1) |
| 592 | 300 { |
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301 std::vector<Segment> segments; |
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302 for (size_t j = 1; j < chain.size(); j++) |
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303 { |
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304 segments.push_back(Segment(chain, j - 1, j)); |
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305 } |
| 592 | 306 |
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307 if (layer.IsClosedChain(i)) |
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308 { |
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309 segments.push_back(Segment(chain, chain.size() - 1, 0)); |
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310 } |
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311 |
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312 // Try and create nice miters |
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313 for (size_t j = 1; j < segments.size(); j++) |
| 592 | 314 { |
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315 Segment::CreateMiter(segments[j - 1], segments[j]); |
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316 } |
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317 |
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318 if (layer.IsClosedChain(i)) |
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319 { |
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320 Segment::CreateMiter(segments.back(), segments.front()); |
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321 } |
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322 |
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323 for (size_t j = 0; j < segments.size(); j++) |
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324 { |
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325 if (!segments[j].IsEmpty()) |
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326 { |
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327 segments[j].AddTriangles(coords, miterDirections, colors, layer.GetColor(i)); |
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328 } |
| 592 | 329 } |
| 330 } | |
| 331 } | |
| 332 | |
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333 assert(coords.size() == colors.size()); |
|
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334 |
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335 if (!coords.empty()) |
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336 { |
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337 verticesCount_ = coords.size() / COMPONENTS_POSITION; |
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338 |
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339 context_.MakeCurrent(); |
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340 glGenBuffers(3, buffers_); |
| 592 | 341 |
|
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342 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); |
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343 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * coords.size(), &coords[0], GL_STATIC_DRAW); |
| 592 | 344 |
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345 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); |
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346 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * miterDirections.size(), &miterDirections[0], GL_STATIC_DRAW); |
|
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347 |
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348 glBindBuffer(GL_ARRAY_BUFFER, buffers_[2]); |
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349 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * colors.size(), &colors[0], GL_STATIC_DRAW); |
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350 } |
| 592 | 351 } |
| 352 } | |
| 353 | |
| 354 | |
| 355 OpenGLLinesProgram::Data::~Data() | |
| 356 { | |
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357 if (!context_.IsContextLost() && !IsEmpty()) |
| 592 | 358 { |
| 359 context_.MakeCurrent(); | |
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360 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteBuffers"); |
|
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361 glDeleteBuffers(3, buffers_); |
| 592 | 362 } |
| 363 } | |
| 364 | |
| 365 GLuint OpenGLLinesProgram::Data::GetVerticesBuffer() const | |
| 366 { | |
| 367 if (IsEmpty()) | |
| 368 { | |
|
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369 LOG(ERROR) << "OpenGLLinesProgram::Data::GetVerticesBuffer(): (IsEmpty())"; |
| 592 | 370 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 371 } | |
| 372 else | |
| 373 { | |
| 374 return buffers_[0]; | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 | |
| 379 GLuint OpenGLLinesProgram::Data::GetMiterDirectionsBuffer() const | |
| 380 { | |
| 381 if (IsEmpty()) | |
| 382 { | |
|
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383 LOG(ERROR) << "OpenGLLinesProgram::Data::GetMiterDirectionsBuffer(): (IsEmpty())"; |
| 592 | 384 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 385 } | |
| 386 else | |
| 387 { | |
| 388 return buffers_[1]; | |
| 389 } | |
| 390 } | |
| 391 | |
| 392 | |
|
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393 GLuint OpenGLLinesProgram::Data::GetColorsBuffer() const |
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394 { |
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395 if (IsEmpty()) |
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396 { |
|
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|
397 LOG(ERROR) << "OpenGLLinesProgram::Data::GetColorsBuffer(): (IsEmpty())"; |
|
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398 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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399 } |
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400 else |
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401 { |
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402 return buffers_[2]; |
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403 } |
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|
404 } |
|
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|
405 |
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406 |
| 592 | 407 OpenGLLinesProgram::OpenGLLinesProgram(OpenGL::IOpenGLContext& context) : |
| 408 context_(context) | |
| 409 { | |
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410 if (!context_.IsContextLost()) |
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|
411 { |
|
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|
412 context_.MakeCurrent(); |
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|
413 program_.reset(new OpenGL::OpenGLProgram(context_)); |
|
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|
414 program_->CompileShaders(VERTEX_SHADER, FRAGMENT_SHADER); |
|
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|
415 } |
| 592 | 416 } |
| 417 | |
| 418 void OpenGLLinesProgram::Apply(const Data& data, | |
| 419 const AffineTransform2D& transform, | |
|
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sanitizing the handling of canvas size
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|
420 unsigned int canvasWidth, |
|
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|
421 unsigned int canvasHeight, |
| 592 | 422 bool antialiasing, |
| 423 bool scaleIndependantThickness) | |
| 424 { | |
|
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|
425 if (!context_.IsContextLost() && !data.IsEmpty()) |
| 592 | 426 { |
| 427 context_.MakeCurrent(); | |
| 428 program_->Use(); | |
| 429 | |
| 430 GLint locationPosition = program_->GetAttributeLocation("a_position"); | |
| 431 GLint locationMiterDirection = program_->GetAttributeLocation("a_miter_direction"); | |
|
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|
432 GLint locationColor = program_->GetAttributeLocation("a_color"); |
| 592 | 433 |
| 434 float m[16]; | |
|
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|
435 transform.ConvertToOpenGLMatrix(m, canvasWidth, canvasHeight); |
| 592 | 436 |
| 437 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m); | |
| 438 | |
| 439 glBindBuffer(GL_ARRAY_BUFFER, data.GetVerticesBuffer()); | |
| 440 glEnableVertexAttribArray(locationPosition); | |
| 441 glVertexAttribPointer(locationPosition, COMPONENTS_POSITION, GL_FLOAT, GL_FALSE, 0, 0); | |
| 442 | |
| 443 glBindBuffer(GL_ARRAY_BUFFER, data.GetMiterDirectionsBuffer()); | |
| 444 glEnableVertexAttribArray(locationMiterDirection); | |
| 445 glVertexAttribPointer(locationMiterDirection, COMPONENTS_MITER, GL_FLOAT, GL_FALSE, 0, 0); | |
| 446 | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
447 glBindBuffer(GL_ARRAY_BUFFER, data.GetColorsBuffer()); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
448 glEnableVertexAttribArray(locationColor); |
|
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
449 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
|
450 |
| 592 | 451 glUniform1i(program_->GetUniformLocation("u_antialiasing"), (antialiasing ? 1 : 0)); |
| 452 | |
| 453 const double zoom = transform.ComputeZoom(); | |
| 454 const double thickness = data.GetThickness() / 2.0; | |
| 455 const double aliasingBorder = 2.0; // Border for antialiasing ramp, in pixels | |
| 456 assert(aliasingBorder > 0); // Prevent division by zero with "t1" | |
| 457 | |
| 458 if (scaleIndependantThickness) | |
| 459 { | |
| 460 if (antialiasing) | |
| 461 { | |
| 462 double t1 = std::max(thickness, aliasingBorder); | |
| 463 double t0 = std::max(0.0, thickness - aliasingBorder); | |
| 464 | |
|
693
9a474e90e832
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
611
diff
changeset
|
465 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
|
466 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
|
467 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
|
468 static_cast<GLfloat>(t0 / t1)); |
| 592 | 469 } |
| 470 else | |
| 471 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
472 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
|
473 static_cast<GLfloat>(thickness / zoom)); |
| 592 | 474 } |
| 475 } | |
| 476 else | |
| 477 { | |
| 478 if (antialiasing) | |
| 479 { | |
| 480 double t1 = std::max(thickness, aliasingBorder / zoom); | |
| 481 double t0 = std::max(0.0, thickness - aliasingBorder / zoom); | |
| 482 | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
483 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
|
484 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
|
485 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
|
486 static_cast<GLfloat>(t0 / t1)); |
| 592 | 487 } |
| 488 else | |
| 489 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
490 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
|
491 static_cast<GLfloat>(thickness)); |
| 592 | 492 } |
| 493 } | |
| 494 | |
| 495 if (antialiasing) | |
| 496 { | |
| 497 glEnable(GL_BLEND); | |
| 498 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
|
499 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
|
500 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 501 glDisable(GL_BLEND); |
| 502 } | |
| 503 else | |
| 504 { | |
|
694
7c6197d9acc9
Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents:
693
diff
changeset
|
505 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
|
506 static_cast<GLsizei>(data.GetVerticesCount())); |
| 592 | 507 } |
| 508 | |
| 509 glDisableVertexAttribArray(locationPosition); | |
| 510 glDisableVertexAttribArray(locationMiterDirection); | |
|
804
61ba4b504e9a
PolylineSceneLayer now has one color per chain
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
702
diff
changeset
|
511 glDisableVertexAttribArray(locationColor); |
| 592 | 512 } |
| 513 } | |
| 514 } | |
| 515 } |