comparison: src/gl/gridprogram.cpp
src/gl/gridprogram.cpp
- changeset 216
- c7241f504117
- parent 167
- c1ff4f107569
- child 217
- 6d95c1a41e6e
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| 215:34c6e7bc4ee1 | 216:c7241f504117 |
|---|---|
| 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 "gridprogram.h" |
| 20 | 20 |
| 21 const char vertexShaderSource[] = R"( | 21 constexpr char vertexShaderSource[] = R"( |
| 22 #version 330 core | 22 #version 330 core |
| 23 | 23 |
| 24 layout (location = 0) in vec2 in_position; | 24 layout (location = 0) in vec2 in_position; |
| 25 uniform mat4 view; | 25 uniform mat4 mvp; |
| 26 uniform mat4 projection; | |
| 27 uniform mat4 model; | |
| 28 smooth out vec2 ex_uv; | 26 smooth out vec2 ex_uv; |
| 29 uniform mat4 grid; | 27 uniform mat4 grid; |
| 30 | 28 |
| 31 void main() | 29 void main() |
| 32 { | 30 { |
| 33 gl_Position = projection * view * model * grid * vec4(in_position, 0.0, 1.0); | 31 gl_Position = mvp * grid * vec4(in_position, 0.0, 1.0); |
| 34 ex_uv = in_position; | 32 ex_uv = in_position; |
| 35 } | 33 } |
| 36 )"; | 34 )"; |
| 37 | 35 |
| 38 const char fragmentShaderSource[] = R"( | 36 constexpr char fragmentShaderSource[] = R"( |
| 39 #version 330 core | 37 #version 330 core |
| 40 | 38 |
| 41 out vec4 color; | 39 out vec4 color; |
| 42 smooth in vec2 ex_uv; | 40 smooth in vec2 ex_uv; |
| 43 uniform vec4 gridColor; | 41 uniform vec4 gridColor; |
| 50 float d = (1.0f - 0.015 * max(abs(ex_uv.x), abs(ex_uv.y))); | 48 float d = (1.0f - 0.015 * max(abs(ex_uv.x), abs(ex_uv.y))); |
| 51 color = vec4(gridColor.xyz, gridColor.w * d); | 49 color = vec4(gridColor.xyz, gridColor.w * d); |
| 52 } | 50 } |
| 53 )"; | 51 )"; |
| 54 | 52 |
| 55 GridProgram::GridProgram(QObject *parent) : | 53 template<int extent> |
| 56 AbstractBasicShaderProgram{parent} | 54 constexpr auto calcGridData() |
| 57 { | 55 { |
| 58 constexpr int extent = 50; | 56 std::array<glm::vec2, 8 * extent + 4> result; |
| 59 this->gridData.reserve(8 * extent + 4); | 57 int ix = 0; |
| 60 for (int i = -extent; i <= extent; i += 1) | 58 for (int i = -extent; i <= extent; i += 1) { |
| 61 { | 59 result[ix++] = {i, -extent}; |
| 62 this->gridData.push_back({i, -extent}); | 60 result[ix++] = {i, extent}; |
| 63 this->gridData.push_back({i, extent}); | |
| 64 } | 61 } |
| 65 for (int i = -extent; i <= extent; i += 1) | 62 for (int i = -extent; i <= extent; i += 1) { |
| 66 { | 63 result[ix++] = {-extent, i}; |
| 67 this->gridData.push_back({-extent, i}); | 64 result[ix++] = {extent, i}; |
| 68 this->gridData.push_back({extent, i}); | 65 } |
| 66 return result; | |
| 67 } | |
| 68 | |
| 69 void GridLayer::setGridMatrix(const glm::mat4& newGridMatrix) | |
| 70 { | |
| 71 this->shader.setUniformMatrix("grid", newGridMatrix); | |
| 72 } | |
| 73 | |
| 74 void GridLayer::setGridColor(const QColor& newGridColor) | |
| 75 { | |
| 76 this->gridColor = gl::colorToVector4(newGridColor); | |
| 77 if (this->isInitialized) { | |
| 78 this->shader.setUniformVector("gridColor", this->gridColor); | |
| 69 } | 79 } |
| 70 } | 80 } |
| 71 | 81 |
| 72 void GridProgram::setGridMatrix(const glm::mat4& newGridMatrix) | 82 void GridLayer::initializeGL() |
| 73 { | 83 { |
| 74 this->setMatrix("grid", newGridMatrix); | 84 this->shader.initialize( |
| 85 ::vertexShaderSource, | |
| 86 ::fragmentShaderSource, | |
| 87 QOpenGLBuffer::StaticDraw, | |
| 88 { | |
| 89 GLAttributeSpec{ | |
| 90 .type = GL_FLOAT, | |
| 91 .offset = 0, | |
| 92 .tuplesize = 2, | |
| 93 .stride = 0, | |
| 94 }, | |
| 95 } | |
| 96 ); | |
| 97 this->isInitialized = true; | |
| 98 constexpr auto data = calcGridData<50>(); | |
| 99 this->shader.setUniformVector("gridColor", this->gridColor); | |
| 100 this->setGridMatrix({{1, 0, 0, 0}, {0, 0, 1, 0}, {0, 1, 0, 0}, {0, 0, 0, 1}}); | |
| 101 this->shader.bufferData(data.data(), data.size(), sizeof data[0]); | |
| 75 } | 102 } |
| 76 | 103 |
| 77 void GridProgram::setGridColor(const QColor& newGridColor) | 104 void GridLayer::paintGL() |
| 78 { | 105 { |
| 79 const glm::vec4 vec = gl::colorToVector4(newGridColor); | 106 glLineWidth(1); |
| 80 if (this->isInitialized) | 107 glEnable(GL_BLEND); |
| 81 { | 108 glLineStipple(1, 0x8888); |
| 82 this->program->bind(); | 109 glEnable(GL_LINE_STIPPLE); |
| 83 this->program->setUniformVector("gridColor", vec); | 110 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
| 84 this->program->release(); | 111 this->shader.draw(GL_LINES); |
| 85 this->checkForGLErrors(); | 112 glDisable(GL_BLEND); |
| 86 } | 113 glDisable(GL_LINE_STIPPLE); |
| 87 else | |
| 88 { | |
| 89 this->gridColor = vec; | |
| 90 } | |
| 91 } | 114 } |
| 92 | 115 |
| 93 const char* GridProgram::vertexShaderSource() const | 116 void GridLayer::mvpMatrixChanged(const glm::mat4& mvpMatrix) |
| 94 { | 117 { |
| 95 return ::vertexShaderSource; | 118 this->shader.setMvpMatrix(mvpMatrix); |
| 96 } | 119 } |
| 97 | |
| 98 const char* GridProgram::fragmentShaderSource() const | |
| 99 { | |
| 100 return ::fragmentShaderSource; | |
| 101 } | |
| 102 | |
| 103 const void* GridProgram::vertexData() const | |
| 104 { | |
| 105 return this->gridData.data(); | |
| 106 } | |
| 107 | |
| 108 int GridProgram::vertexSize() const | |
| 109 { | |
| 110 return sizeof this->gridData[0]; | |
| 111 } | |
| 112 | |
| 113 int GridProgram::vertexCount() const | |
| 114 { | |
| 115 return this->gridData.size(); | |
| 116 } | |
| 117 | |
| 118 void GridProgram::setupVertexArrays() | |
| 119 { | |
| 120 this->program->enableAttributeArray(0); | |
| 121 this->program->setAttributeBuffer(0, GL_FLOAT, 0, 2, 0); | |
| 122 this->program->setUniformVector("gridColor", this->gridColor); | |
| 123 } | |
| 124 | |
| 125 GLenum GridProgram::drawMode() const | |
| 126 { | |
| 127 return GL_LINES; | |
| 128 } | |
| 129 | |
| 130 QOpenGLBuffer::UsagePattern GridProgram::usagePattern() const | |
| 131 { | |
| 132 return QOpenGLBuffer::StaticDraw; | |
| 133 } |
