comparison: src/gl/geometrypreview.cpp
src/gl/geometrypreview.cpp
- changeset 102
- 9f435f66bd0c
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replaced
| 101:910890292639 | 102:9f435f66bd0c |
|---|---|
| 1 #include "geometrypreview.h" | |
| 2 | |
| 3 const char vertexShaderSource[] = R"( | |
| 4 #version 330 core | |
| 5 | |
| 6 layout (location = 0) in vec3 in_position; | |
| 7 layout (location = 1) in vec3 in_color; | |
| 8 uniform mat4 view; | |
| 9 uniform mat4 projection; | |
| 10 uniform mat4 model; | |
| 11 smooth out vec3 ex_color; | |
| 12 | |
| 13 void main() | |
| 14 { | |
| 15 gl_Position = projection * view * model * vec4(in_position, 1.0); | |
| 16 ex_color = in_color; | |
| 17 } | |
| 18 )"; | |
| 19 | |
| 20 const char fragmentShaderSource[] = R"( | |
| 21 #version 330 core | |
| 22 | |
| 23 out vec4 color; | |
| 24 smooth in vec3 ex_color; | |
| 25 | |
| 26 void main(void) | |
| 27 { | |
| 28 color = vec4(ex_color, 1); | |
| 29 } | |
| 30 )"; | |
| 31 | |
| 32 constexpr std::size_t vertexSize = sizeof(GeometryPreview::Vertex); | |
| 33 | |
| 34 GeometryPreview::GeometryPreview(QObject *parent) : | |
| 35 AbstractShaderProgram{{ | |
| 36 {GL_LINES, vertexSize, QOpenGLBuffer::DynamicDraw}, | |
| 37 {GL_TRIANGLES, vertexSize, QOpenGLBuffer::DynamicDraw} | |
| 38 }, parent} | |
| 39 { | |
| 40 } | |
| 41 | |
| 42 GeometryPreview::~GeometryPreview() | |
| 43 { | |
| 44 } | |
| 45 | |
| 46 QVector<GeometryPreview::Vertex>& GeometryPreview::modifyLinesBuffer() | |
| 47 { | |
| 48 this->needRebuild = true; | |
| 49 return this->lines; | |
| 50 } | |
| 51 | |
| 52 QVector<GeometryPreview::Vertex>& GeometryPreview::modifyTrianglesBuffer() | |
| 53 { | |
| 54 this->needRebuild = true; | |
| 55 return this->triangles; | |
| 56 } | |
| 57 | |
| 58 void GeometryPreview::initialize() | |
| 59 { | |
| 60 if (not this->isInitialized) | |
| 61 { | |
| 62 this->isInitialized = true; | |
| 63 this->program.emplace(this); | |
| 64 gl::buildShaders(&*this->program, ::vertexShaderSource, ::fragmentShaderSource); | |
| 65 this->program->bind(); | |
| 66 for (QOpenGLBuffer* buffer : {&this->linesBuffer, &this->trianglesBuffer}) | |
| 67 { | |
| 68 buffer->create(); | |
| 69 buffer->bind(); | |
| 70 buffer->setUsagePattern(QOpenGLBuffer::DynamicDraw); | |
| 71 } | |
| 72 this->vertexArrayObject.create(); | |
| 73 this->vertexArrayObject.bind(); | |
| 74 this->setupVertexArrays(); | |
| 75 this->vertexArrayObject.release(); | |
| 76 for (auto& buffer : {this->linesBuffer, this->trianglesBuffer}) | |
| 77 { | |
| 78 buffer->release(); | |
| 79 } | |
| 80 this->program->release(); | |
| 81 this->checkForGLErrors(); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 void GeometryPreview::rebuildIfNecessary() | |
| 86 { | |
| 87 if (this->needRebuild) | |
| 88 { | |
| 89 this->buffer.allocate(this->vertexData(), this->vertexCount() * this->vertexSize()); | |
| 90 this->needRebuild = false; | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 void GeometryPreview::checkForGLErrors() | |
| 95 { | |
| 96 gl::checkForGLErrors(qobject_cast<QWidget*>(this->parent())); | |
| 97 } | |
| 98 | |
| 99 void GeometryPreview::setupVertexArrays() | |
| 100 { | |
| 101 for (int i : {0, 1}) | |
| 102 { | |
| 103 this->program->enableAttributeArray(i); | |
| 104 } | |
| 105 const int stride = this->vertexSize(); | |
| 106 this->program->setAttributeBuffer(0, GL_FLOAT, offsetof(Vertex, position), 3, stride); | |
| 107 this->program->setAttributeBuffer(1, GL_FLOAT, offsetof(Vertex, color), 4, stride); | |
| 108 } |
