mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
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76 lines
3.7 KiB
C++
76 lines
3.7 KiB
C++
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/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#ifndef IFCVIEWER_OVERLAYRENDERER_H
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#define IFCVIEWER_OVERLAYRENDERER_H
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#include <QString>
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#include <QtOpenGL/QOpenGLFunctions_4_5_Core>
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#include <vector>
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// Neutral overlay-primitive renderer attached to ViewportWindow. Today it
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// draws a single tinted, translucent triangle list in world space — used by
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// the area-measurement tool to shade selected coplanar patches. More
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// primitives (lines, points, world-anchored labels) will land here as
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// future tools require them.
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//
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// Lifetime: owned by ViewportWindow, initialised in the same context. All
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// public methods assume the caller has already made the GL context current.
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class OverlayRenderer {
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public:
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void initialize(QOpenGLFunctions_4_5_Core* gl);
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void release();
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// Replace the highlight-triangle list. `world_xyz` is 3 floats per
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// vertex, 3 verts per triangle, in world space (post-composed-transform).
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// Empty disables the overlay. Color is RGBA in [0, 1].
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void setHighlightTriangles(const std::vector<float>& world_xyz,
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float r, float g, float b, float a);
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// Top-left HUD text drawn via QPainter on the GL surface as part of
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// render(). Empty hides the HUD.
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void setHudText(const QString& text);
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// Render every overlay primitive in order: GL highlight triangles
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// (using `view_proj`, column-major float[16]), then HUD text via
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// QPainter on a QOpenGLPaintDevice sized to (pixel_w × pixel_h)
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// with the supplied device pixel ratio. Caller is responsible for
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// ensuring glViewport covers the full surface — the QPainter pass
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// after this call leaves GL state in an undefined shape, so treat
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// this as the last GL operation per frame before swapBuffers (or
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// sandwich it before any pass that re-binds its own programs).
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void render(const float view_proj[16],
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int pixel_w, int pixel_h, qreal device_pixel_ratio);
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private:
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QOpenGLFunctions_4_5_Core* gl_ = nullptr;
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GLuint program_ = 0;
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GLuint vao_ = 0;
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GLuint vbo_ = 0;
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size_t vbo_capacity_ = 0; // bytes
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GLsizei vertex_count_ = 0;
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float color_[4] = {0, 0, 0, 0};
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GLint u_view_proj_ = -1;
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GLint u_color_ = -1;
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QString hud_text_;
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};
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#endif // IFCVIEWER_OVERLAYRENDERER_H
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