comparison: src/gl/axesprogram.cpp
src/gl/axesprogram.cpp
- changeset 263
- 59b6027b9843
- parent 262
- dc33f8a707c4
- child 264
- 76a025db4948
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| 262:dc33f8a707c4 | 263:59b6027b9843 |
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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 "gl/partrenderer.h" | |
| 20 #include <QPainter> | |
| 21 #include <QPainterPath> | |
| 22 #include "axesprogram.h" | |
| 23 | |
| 24 static constexpr char vertexShaderSource[] = R"( | |
| 25 #version 330 core | |
| 26 | |
| 27 layout (location = 0) in vec3 in_position; | |
| 28 layout (location = 1) in vec3 in_color; | |
| 29 uniform mat4 mvp; | |
| 30 smooth out vec3 ex_color; | |
| 31 | |
| 32 void main() | |
| 33 { | |
| 34 gl_Position = mvp * vec4(in_position, 1.0); | |
| 35 ex_color = in_color; | |
| 36 } | |
| 37 )"; | |
| 38 | |
| 39 static constexpr 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 void AxesLayer::initializeGL() | |
| 52 { | |
| 53 constexpr struct VertexType | |
| 54 { | |
| 55 glm::vec3 position; | |
| 56 glm::vec3 color; | |
| 57 } data[] = { | |
| 58 {{10000, 0, 0}, {1, 0, 0}}, | |
| 59 {{0, 0, 0}, {1, 0, 0}}, | |
| 60 {{-10000, 0, 0}, {0.5, 0, 0}}, | |
| 61 {{0, 0, 0}, {0.5, 0, 0}}, | |
| 62 {{0, 10000, 0}, {0, 1, 0}}, | |
| 63 {{0, 0, 0}, {0, 1, 0}}, | |
| 64 {{0, -10000, 0}, {0, 0.5, 0}}, | |
| 65 {{0, 0, 0}, {0, 0.5, 0}}, | |
| 66 {{0, 0, 10000}, {0, 0, 1}}, | |
| 67 {{0, 0, 0}, {0, 0, 1}}, | |
| 68 {{0, 0, -10000}, {0, 0, 0.5}}, | |
| 69 {{0, 0, 0}, {0, 0, 0.5}}, | |
| 70 }; | |
| 71 constexpr int stride = sizeof(VertexType); | |
| 72 this->shader.initialize( | |
| 73 ::vertexShaderSource, | |
| 74 ::fragmentShaderSource, | |
| 75 QOpenGLBuffer::StaticDraw, | |
| 76 { | |
| 77 GLAttributeSpec{ | |
| 78 .type = GL_FLOAT, | |
| 79 .offset = offsetof(VertexType, position), | |
| 80 .tuplesize = 3, | |
| 81 .stride = stride, | |
| 82 }, | |
| 83 { | |
| 84 .type = GL_FLOAT, | |
| 85 .offset = offsetof(VertexType, color), | |
| 86 .tuplesize = 3, | |
| 87 .stride = stride, | |
| 88 }, | |
| 89 }); | |
| 90 this->shader.bufferData(&data[0], countof(data), sizeof data[0]); | |
| 91 } | |
| 92 | |
| 93 void AxesLayer::overpaint(QPainter* painter) | |
| 94 { | |
| 95 painter->save(); | |
| 96 QFont font; | |
| 97 font.setStyle(QFont::StyleItalic); | |
| 98 font.setBold(true); | |
| 99 painter->setFont(font); | |
| 100 QFontMetrics fontMetrics{font}; | |
| 101 const auto renderText = [&](const QString& text, const PointOnRectagle& intersection) | |
| 102 { | |
| 103 QPointF position = toQPointF(intersection.position); | |
| 104 const RectangleSide side = intersection.side; | |
| 105 switch (side) | |
| 106 { | |
| 107 case RectangleSide::Top: | |
| 108 position += QPointF{0, static_cast<qreal>(fontMetrics.ascent())}; | |
| 109 break; | |
| 110 case RectangleSide::Left: | |
| 111 break; | |
| 112 case RectangleSide::Bottom: | |
| 113 position += QPointF{0, static_cast<qreal>(-fontMetrics.descent())}; | |
| 114 break; | |
| 115 case RectangleSide::Right: | |
| 116 position += QPointF{static_cast<qreal>(-fontMetrics.horizontalAdvance(text)), 0}; | |
| 117 break; | |
| 118 } | |
| 119 drawBorderedText(painter, position, font, text); | |
| 120 }; | |
| 121 const QRectF box {QPointF{0, 0}, sizeToSizeF(this->renderer->size())}; | |
| 122 const QPointF p1 = this->renderer->modelToScreenCoordinates(glm::vec3{0, 0, 0}); | |
| 123 static const struct | |
| 124 { | |
| 125 QString text; | |
| 126 glm::vec3 direction; | |
| 127 } directions[] = | |
| 128 { | |
| 129 {"+x", {1, 0, 0}}, | |
| 130 {"-x", {-1, 0, 0}}, | |
| 131 {"+y", {0, 1, 0}}, | |
| 132 {"-y", {0, -1, 0}}, | |
| 133 {"+z", {0, 0, 1}}, | |
| 134 {"-z", {0, 0, -1}}, | |
| 135 }; | |
| 136 for (const auto& axis : directions) | |
| 137 { | |
| 138 const QPointF x_p = this->renderer->modelToScreenCoordinates(axis.direction); | |
| 139 const auto intersection = rayRectangleIntersection( | |
| 140 rayFromPoints(toVec2(p1), toVec2(x_p)), | |
| 141 box); | |
| 142 if (intersection.has_value()) | |
| 143 { | |
| 144 renderText(axis.text, *intersection); | |
| 145 } | |
| 146 } | |
| 147 painter->restore(); | |
| 148 } | |
| 149 | |
| 150 void AxesLayer::paintGL() | |
| 151 { | |
| 152 glLineWidth(5); | |
| 153 glEnable(GL_LINE_SMOOTH); | |
| 154 glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); | |
| 155 this->shader.draw(GL_LINES); | |
| 156 glDisable(GL_LINE_SMOOTH); | |
| 157 } | |
| 158 | |
| 159 void AxesLayer::mvpMatrixChanged(const glm::mat4& mvpMatrix) | |
| 160 { | |
| 161 this->shader.setMvpMatrix(mvpMatrix); | |
| 162 } |
