src/gl/axesprogram.cpp

Sat, 05 Mar 2022 13:18:40 +0200

author
Teemu Piippo <teemu@hecknology.net>
date
Sat, 05 Mar 2022 13:18:40 +0200
changeset 161
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parent 118
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child 215
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permissions
-rw-r--r--

Icons update

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1 /*
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2 * LDForge: LDraw parts authoring CAD
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3 * Copyright (C) 2020 Teemu Piippo
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4 *
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5 * This program is free software: you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation, either version 3 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18
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19 #include "axesprogram.h"
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20
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21 const char vertexShaderSource[] = R"(
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22 #version 330 core
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23
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24 layout (location = 0) in vec3 in_position;
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25 layout (location = 1) in vec3 in_color;
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26 uniform mat4 view;
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27 uniform mat4 projection;
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28 uniform mat4 model;
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29 smooth out vec3 ex_color;
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30
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31 void main()
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32 {
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33 gl_Position = projection * view * model * vec4(in_position, 1.0);
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34 ex_color = in_color;
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35 }
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36 )";
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37
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38 const char fragmentShaderSource[] = R"(
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39 #version 330 core
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40
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41 out vec4 color;
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42 smooth in vec3 ex_color;
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43
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44 void main(void)
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45 {
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46 color = vec4(ex_color, 1);
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47 }
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48 )";
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49
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50 namespace
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51 {
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52 struct AxesVertex
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53 {
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54 glm::vec3 position;
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55 glm::vec3 color;
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56 };
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57 }
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58
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59 static const AxesVertex data[] =
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60 {
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61 AxesVertex{{10000, 0, 0}, {1, 0, 0}},
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62 AxesVertex{{0, 0, 0}, {1, 0, 0}},
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63 AxesVertex{{-10000, 0, 0}, {0.5, 0, 0}},
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64 AxesVertex{{0, 0, 0}, {0.5, 0, 0}},
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65 AxesVertex{{0, 10000, 0}, {0, 1, 0}},
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66 AxesVertex{{0, 0, 0}, {0, 1, 0}},
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67 AxesVertex{{0, -10000, 0}, {0, 0.5, 0}},
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68 AxesVertex{{0, 0, 0}, {0, 0.5, 0}},
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69 AxesVertex{{0, 0, 10000}, {0, 0, 1}},
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70 AxesVertex{{0, 0, 0}, {0, 0, 1}},
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71 AxesVertex{{0, 0, -10000}, {0, 0, 0.5}},
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72 AxesVertex{{0, 0, 0}, {0, 0, 0.5}},
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73 };
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75 const char* AxesProgram::vertexShaderSource() const
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76 {
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77 return ::vertexShaderSource;
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78 }
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79
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80 const char* AxesProgram::fragmentShaderSource() const
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81 {
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82 return ::fragmentShaderSource;
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83 }
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84
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85 const void* AxesProgram::vertexData() const
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86 {
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87 return ::data;
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88 }
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89
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90 GLenum AxesProgram::drawMode() const
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91 {
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92 return GL_LINES;
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93 }
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94
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95 int AxesProgram::vertexSize() const
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96 {
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97 return sizeof data[0];
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98 }
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99
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100 int AxesProgram::vertexCount() const
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101 {
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102 return countof(data);
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103 }
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104
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105 void AxesProgram::setupVertexArrays()
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106 {
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107 for (int i : {0, 1})
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108 {
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109 this->program->enableAttributeArray(i);
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110 }
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111 const int stride = this->vertexSize();
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112 this->program->setAttributeBuffer(0, GL_FLOAT, offsetof(AxesVertex, position), 3, stride);
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113 this->program->setAttributeBuffer(1, GL_FLOAT, offsetof(AxesVertex, color), 3, stride);
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114 }
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115
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116 QOpenGLBuffer::UsagePattern AxesProgram::usagePattern() const
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117 {
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118 return QOpenGLBuffer::StaticDraw;
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119 }

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