Pass elapsed time to renderer and use for time UBO

src/vulkanrenderer.cpp

@@ -483,6 +483,7 @@ void VulkanRenderer::recordCommandBuffer(VkCommandBuffer commandBuffer,
                                         uint32_t imageIndex,
                                         VkImageView imageView,
                                         int frameCount,
+                                        double elapsedTime,
                                         double rotationAngle,
                                         double wavePhase,
                                         bool paintingEnabled,
@@ -553,7 +554,7 @@ void VulkanRenderer::recordCommandBuffer(VkCommandBuffer commandBuffer,
     }
 
     // Update uniform buffer
-    m_ubo.time = static_cast<float>(frameCount);
+    m_ubo.time = static_cast<float>(elapsedTime);
     m_ubo.resolution[0] = static_cast<float>(m_width);
     m_ubo.resolution[1] = static_cast<float>(m_height);
     m_ubo.rotation = static_cast<float>(rotationAngle);

src/vulkanrenderer.h

@@ -103,6 +103,7 @@ public:
      * @param imageIndex 交换链图像索引
      * @param imageView 交换链图像视图
      * @param frameCount 当前帧数
+     * @param elapsedTime 运行时间（秒）
      * @param rotationAngle 旋转角度
      * @param wavePhase 波浪相位
      * @param paintingEnabled 是否启用绘制
@@ -112,6 +113,7 @@ public:
                             uint32_t imageIndex,
                             VkImageView imageView,
                             int frameCount,
+                            double elapsedTime,
                             double rotationAngle,
                             double wavePhase,
                             bool paintingEnabled,

src/vulkanwidget.cpp

@@ -866,8 +866,13 @@ void VulkanWidget::recordCommandBuffer(VkCommandBuffer commandBuffer, uint32_t i
                 .arg(m_lockCount);
         }
 
+        // Calculate elapsed time in seconds
+        QDateTime now = QDateTime::currentDateTime();
+        qint64 elapsedTime = m_startTime.secsTo(now);
+        
         m_renderer->recordCommandBuffer(commandBuffer, imageIndex, imageView,
-                                        m_frameCount, m_rotationAngle, m_wavePhase,
+                                        m_frameCount, static_cast<double>(elapsedTime),
+                                        m_rotationAngle, m_wavePhase,
                                         m_renderingEnabled, lockInfo.toStdString());
         return;
     }