comparison: src/gl/axesprogram.cpp
src/gl/axesprogram.cpp
- changeset 70
- f21b800b02a4
- parent 69
- a36913fc552a
- child 74
- 6b51e7b7c459
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replaced
| 69:a36913fc552a | 70:f21b800b02a4 |
|---|---|
| 14 * | 14 * |
| 15 * You should have received a copy of the GNU General Public License | 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/>. | 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 */ | 17 */ |
| 18 | 18 |
| 19 #include "gridprogram.h" | 19 #include "axesprogram.h" |
| 20 | 20 |
| 21 // Based on https://stackoverflow.com/q/30842755 | 21 // Based on https://stackoverflow.com/q/30842755 |
| 22 const char vertexShaderSource[] = R"( | 22 const char vertexShaderSource[] = R"( |
| 23 #version 330 core | 23 #version 330 core |
| 24 | 24 |
| 29 uniform mat4 model; | 29 uniform mat4 model; |
| 30 smooth out vec3 ex_color; | 30 smooth out vec3 ex_color; |
| 31 | 31 |
| 32 void main() | 32 void main() |
| 33 { | 33 { |
| 34 gl_Position = projection * view * model * vec4(in_position, 0.0, 1.0); | 34 gl_Position = projection * view * model * vec4(in_position, 1.0); |
| 35 ex_uv = ex_color; | 35 ex_color = in_color; |
| 36 } | 36 } |
| 37 )"; | 37 )"; |
| 38 | 38 |
| 39 const char fragmentShaderSource[] = R"( | 39 const char fragmentShaderSource[] = R"( |
| 40 #version 330 core | 40 #version 330 core |
| 42 out vec4 color; | 42 out vec4 color; |
| 43 smooth in vec3 ex_color; | 43 smooth in vec3 ex_color; |
| 44 | 44 |
| 45 void main(void) | 45 void main(void) |
| 46 { | 46 { |
| 47 color = vec4(ex_color, 1) | 47 color = vec4(ex_color, 1); |
| 48 } | 48 } |
| 49 )"; | 49 )"; |
| 50 | 50 |
| 51 namespace | 51 namespace |
| 52 { | 52 { |
| 65 AxesVertex{{0, 10000, 0}, {0, 1, 0}}, | 65 AxesVertex{{0, 10000, 0}, {0, 1, 0}}, |
| 66 AxesVertex{{0, 0, -10000}, {0, 0, 1}}, | 66 AxesVertex{{0, 0, -10000}, {0, 0, 1}}, |
| 67 AxesVertex{{0, 0, 10000}, {0, 0, 1}}, | 67 AxesVertex{{0, 0, 10000}, {0, 0, 1}}, |
| 68 }; | 68 }; |
| 69 | 69 |
| 70 AxesProgram::AxesProgram(QObject* parent) : | 70 const char* AxesProgram::vertexShaderSource() const |
| 71 QObject{parent}, | |
| 72 buffer{QOpenGLBuffer::VertexBuffer}, | |
| 73 vertexShader{QOpenGLShader::Vertex}, | |
| 74 fragmentShader{QOpenGLShader::Fragment} | |
| 75 { | 71 { |
| 72 return ::vertexShaderSource; | |
| 76 } | 73 } |
| 77 | 74 |
| 78 void AxesProgram::initialize() | 75 const char* AxesProgram::fragmentShaderSource() const |
| 79 { | 76 { |
| 80 if (not isInitialized) | 77 return ::fragmentShaderSource; |
| 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 } | 78 } |
| 102 | 79 |
| 103 void AxesProgram::setViewMatrix(const glm::mat4& newViewMatrix) | 80 const void* AxesProgram::vertexData() const |
| 104 { | 81 { |
| 105 this->setMatrix("view", newViewMatrix); | 82 return ::data; |
| 106 } | 83 } |
| 107 | 84 |
| 108 void AxesProgram::setProjectionMatrix(const glm::mat4& newProjectionMatrix) | 85 GLenum AxesProgram::drawMode() const |
| 109 { | 86 { |
| 110 this->setMatrix("projection", newProjectionMatrix); | 87 return GL_LINES; |
| 111 } | 88 } |
| 112 | 89 |
| 113 void AxesProgram::setModelMatrix(const glm::mat4& newModelMatrix) | 90 int AxesProgram::vertexSize() const |
| 114 { | 91 { |
| 115 this->setMatrix("model", newModelMatrix); | 92 return sizeof data[0]; |
| 116 } | 93 } |
| 117 | 94 |
| 118 void AxesProgram::setGridMatrix(const glm::mat4& newGridMatrix) | 95 int AxesProgram::vertexCount() const |
| 119 { | 96 { |
| 120 this->setMatrix("grid", newGridMatrix); | 97 return countof(data); |
| 121 } | 98 } |
| 122 | 99 |
| 123 void AxesProgram::setMatrix(const char* name, const glm::mat4& matrix) | 100 void AxesProgram::setupVertexArrays() |
| 124 { | 101 { |
| 125 Q_ASSERT(this->isInitialized); | 102 for (int i : {0, 1}) |
| 126 this->program->bind(); | 103 { |
| 127 this->program->setUniformMatrix(name, matrix); | 104 this->program->enableAttributeArray(i); |
| 128 this->program->release(); | 105 } |
| 129 this->checkForGLErrors(); | 106 const int stride = this->vertexSize(); |
| 107 this->program->setAttributeBuffer(0, GL_FLOAT, offsetof(AxesVertex, position), 3, stride); | |
| 108 this->program->setAttributeBuffer(1, GL_FLOAT, offsetof(AxesVertex, color), 3, stride); | |
| 130 } | 109 } |
| 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 } |
