lightpreview: add "Draw Translucency as Opaque" checkbox

lightpreview/glview.cpp

@@ -581,9 +581,17 @@ void GLView::paintGL()
     m_skybox_program->setUniformValue(m_skybox_program_drawnormals_location, m_drawNormals);
     m_skybox_program->setUniformValue(m_skybox_program_drawflat_location, m_drawFlat);
 
+    // resolves whether to render a particular drawcall as opaque
+    auto draw_as_opaque = [&](const drawcall_t &draw) -> bool {
+        if (m_drawTranslucencyAsOpaque)
+            return true;
+
+        return draw.key.opacity == 1.0f;
+    };
+
     // opaque draws
     for (auto &draw : m_drawcalls) {
-        if (draw.key.opacity != 1.0f)
+        if (!draw_as_opaque(draw))
             continue;
 
         if (active_program != draw.key.program) {
@@ -603,6 +611,12 @@ void GLView::paintGL()
             face_visibility_texture->bind(2 /* texture unit */);
         }
 
+        if (active_program == m_program) {
+            m_program->setUniformValue(m_program_opacity_location, 1.0f);
+        } else {
+            m_skybox_program->setUniformValue(m_skybox_program_opacity_location, 1.0f);
+        }
+
         QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
 
         glDrawElements(GL_TRIANGLES, draw.index_count, GL_UNSIGNED_INT,
@@ -615,7 +629,7 @@ void GLView::paintGL()
         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
         for (auto &draw : m_drawcalls) {
-            if (draw.key.opacity == 1.0f)
+            if (draw_as_opaque(draw))
                 continue;
 
             if (active_program != draw.key.program) {
@@ -823,6 +837,12 @@ void GLView::setMagFilter(QOpenGLTexture::Filter filter)
     update();
 }
 
+void GLView::setDrawTranslucencyAsOpaque(bool drawopaque)
+{
+    m_drawTranslucencyAsOpaque = drawopaque;
+    update();
+}
+
 void GLView::takeScreenshot(QString destPath, int w, int h)
 {
     // update aspect ratio

lightpreview/glview.h

@@ -96,6 +96,7 @@ private:
     bool m_drawPortals = false;
     bool m_drawLeak = false;
     QOpenGLTexture::Filter m_filter = QOpenGLTexture::Linear;
+    bool m_drawTranslucencyAsOpaque = false;
 
     QOpenGLVertexArrayObject m_vao;
     QOpenGLBuffer m_vbo;
@@ -207,6 +208,7 @@ public:
     void setLightStyleIntensity(int style_id, int intensity);
     void setMagFilter(QOpenGLTexture::Filter filter);
     const bool &getKeepOrigin() const { return m_keepOrigin; }
+    void setDrawTranslucencyAsOpaque(bool drawopaque);
 
     void takeScreenshot(QString destPath, int w, int h);
 

lightpreview/mainwindow.cpp

@@ -187,6 +187,8 @@ void MainWindow::createPropertiesSidebar()
     bspx_normals = new QCheckBox(tr("BSPX: Face Normals"));
     bspx_normals->setChecked(true);
 
+    auto *draw_opaque = new QCheckBox(tr("Draw Translucency as Opaque"));
+
     formLayout->addRow(tr("common"), common_options);
     formLayout->addRow(tr("qbsp"), qbsp_options);
     formLayout->addRow(vis_checkbox, vis_options);
@@ -202,6 +204,7 @@ void MainWindow::createPropertiesSidebar()
     formLayout->addRow(nearest);
     formLayout->addRow(bspx_decoupled_lm);
     formLayout->addRow(bspx_normals);
+    formLayout->addRow(draw_opaque);
 
     lightstyles = new QVBoxLayout();
 
@@ -253,6 +256,8 @@ void MainWindow::createPropertiesSidebar()
     connect(keepposition, &QAbstractButton::toggled, this, [=](bool checked) { glView->setKeepOrigin(checked); });
     connect(nearest, &QAbstractButton::toggled, this,
         [=](bool checked) { glView->setMagFilter(checked ? QOpenGLTexture::Nearest : QOpenGLTexture::Linear); });
+    connect(draw_opaque, &QAbstractButton::toggled, this,
+        [=](bool checked) { glView->setDrawTranslucencyAsOpaque(checked); });
     connect(glView, &GLView::cameraMoved, this, &MainWindow::displayCameraPositionInfo);
 
     // set up load timer