comparison: src/gl/axesprogram.cpp
src/gl/axesprogram.cpp
- changeset 69
- a36913fc552a
- child 70
- f21b800b02a4
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| 68:ddb07bb6840c | 69:a36913fc552a |
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| 1 /* | |
| 2 * LDForge: LDraw parts authoring CAD | |
| 3 * Copyright (C) 2020 Teemu Piippo | |
| 4 * | |
| 5 * This program is free software: you can redistribute it and/or modify | |
| 6 * it under the terms of the GNU General Public License as published by | |
| 7 * the Free Software Foundation, either version 3 of the License, or | |
| 8 * (at your option) any later version. | |
| 9 * | |
| 10 * This program is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 * GNU General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License | |
| 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 */ | |
| 18 | |
| 19 #include "gridprogram.h" | |
| 20 | |
| 21 // Based on https://stackoverflow.com/q/30842755 | |
| 22 const char vertexShaderSource[] = R"( | |
| 23 #version 330 core | |
| 24 | |
| 25 layout (location = 0) in vec3 in_position; | |
| 26 layout (location = 1) in vec3 in_color; | |
| 27 uniform mat4 view; | |
| 28 uniform mat4 projection; | |
| 29 uniform mat4 model; | |
| 30 smooth out vec3 ex_color; | |
| 31 | |
| 32 void main() | |
| 33 { | |
| 34 gl_Position = projection * view * model * vec4(in_position, 0.0, 1.0); | |
| 35 ex_uv = ex_color; | |
| 36 } | |
| 37 )"; | |
| 38 | |
| 39 const char fragmentShaderSource[] = R"( | |
| 40 #version 330 core | |
| 41 | |
| 42 out vec4 color; | |
| 43 smooth in vec3 ex_color; | |
| 44 | |
| 45 void main(void) | |
| 46 { | |
| 47 color = vec4(ex_color, 1) | |
| 48 } | |
| 49 )"; | |
| 50 | |
| 51 namespace | |
| 52 { | |
| 53 struct AxesVertex | |
| 54 { | |
| 55 glm::vec3 position; | |
| 56 glm::vec3 color; | |
| 57 }; | |
| 58 } | |
| 59 | |
| 60 static AxesVertex data[] = | |
| 61 { | |
| 62 AxesVertex{{-10000, 0, 0}, {1, 0, 0}}, | |
| 63 AxesVertex{{10000, 0, 0}, {1, 0, 0}}, | |
| 64 AxesVertex{{0, -10000, 0}, {0, 1, 0}}, | |
| 65 AxesVertex{{0, 10000, 0}, {0, 1, 0}}, | |
| 66 AxesVertex{{0, 0, -10000}, {0, 0, 1}}, | |
| 67 AxesVertex{{0, 0, 10000}, {0, 0, 1}}, | |
| 68 }; | |
| 69 | |
| 70 AxesProgram::AxesProgram(QObject* parent) : | |
| 71 QObject{parent}, | |
| 72 buffer{QOpenGLBuffer::VertexBuffer}, | |
| 73 vertexShader{QOpenGLShader::Vertex}, | |
| 74 fragmentShader{QOpenGLShader::Fragment} | |
| 75 { | |
| 76 } | |
| 77 | |
| 78 void AxesProgram::initialize() | |
| 79 { | |
| 80 if (not isInitialized) | |
| 81 { | |
| 82 this->initializeOpenGLFunctions(); | |
| 83 this->isInitialized = true; | |
| 84 this->program.emplace(this); | |
| 85 gl::buildShaders(&*this->program, ::vertexShaderSource, ::fragmentShaderSource); | |
| 86 this->program->bind(); | |
| 87 this->buffer.create(); | |
| 88 this->buffer.bind(); | |
| 89 this->buffer.setUsagePattern(QOpenGLBuffer::StaticDraw); | |
| 90 this->buffer.allocate(data, countof(data) * sizeof data[0]); | |
| 91 this->vertexArrayObject.create(); | |
| 92 this->vertexArrayObject.bind(); | |
| 93 this->program->enableAttributeArray(0); | |
| 94 this->program->setAttributeBuffer(0, GL_FLOAT, 0, 2, 0); | |
| 95 this->program->setUniformVector("gridColor", this->gridColor); | |
| 96 this->vertexArrayObject.release(); | |
| 97 this->buffer.release(); | |
| 98 this->program->release(); | |
| 99 this->checkForGLErrors(); | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 void AxesProgram::setViewMatrix(const glm::mat4& newViewMatrix) | |
| 104 { | |
| 105 this->setMatrix("view", newViewMatrix); | |
| 106 } | |
| 107 | |
| 108 void AxesProgram::setProjectionMatrix(const glm::mat4& newProjectionMatrix) | |
| 109 { | |
| 110 this->setMatrix("projection", newProjectionMatrix); | |
| 111 } | |
| 112 | |
| 113 void AxesProgram::setModelMatrix(const glm::mat4& newModelMatrix) | |
| 114 { | |
| 115 this->setMatrix("model", newModelMatrix); | |
| 116 } | |
| 117 | |
| 118 void AxesProgram::setGridMatrix(const glm::mat4& newGridMatrix) | |
| 119 { | |
| 120 this->setMatrix("grid", newGridMatrix); | |
| 121 } | |
| 122 | |
| 123 void AxesProgram::setMatrix(const char* name, const glm::mat4& matrix) | |
| 124 { | |
| 125 Q_ASSERT(this->isInitialized); | |
| 126 this->program->bind(); | |
| 127 this->program->setUniformMatrix(name, matrix); | |
| 128 this->program->release(); | |
| 129 this->checkForGLErrors(); | |
| 130 } | |
| 131 | |
| 132 void GridProgram::setGridColor(const QColor& newGridColor) | |
| 133 { | |
| 134 const glm::vec4 vec = gl::colorToVector4(newGridColor); | |
| 135 if (this->isInitialized) | |
| 136 { | |
| 137 this->program->bind(); | |
| 138 this->program->setUniformVector("gridColor", vec); | |
| 139 this->program->release(); | |
| 140 this->checkForGLErrors(); | |
| 141 } | |
| 142 else | |
| 143 { | |
| 144 this->gridColor = vec; | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 void GridProgram::draw() | |
| 149 { | |
| 150 this->program->bind(); | |
| 151 this->vertexArrayObject.bind(); | |
| 152 glDrawArrays(GL_QUADS, 0, countof(data)); | |
| 153 this->vertexArrayObject.release(); | |
| 154 this->program->release(); | |
| 155 this->checkForGLErrors(); | |
| 156 } | |
| 157 | |
| 158 void GridProgram::teardown() | |
| 159 { | |
| 160 this->vertexArrayObject.destroy(); | |
| 161 this->buffer.destroy(); | |
| 162 this->program.reset(); | |
| 163 } | |
| 164 | |
| 165 void GridProgram::checkForGLErrors() | |
| 166 { | |
| 167 gl::checkForGLErrors(qobject_cast<QWidget*>(this->parent())); | |
| 168 } |
