终于把线画出来了。

samples/api/texture_loading/texture_loading.cpp

@@ -670,7 +670,7 @@ void TextureLoading::setup_descriptor_pool()
 		vkb::initializers::descriptor_pool_create_info(
 			static_cast<uint32_t>(pool_sizes.size()),
 			pool_sizes.data(),
-			4);
+			6);
 
 	VK_CHECK(vkCreateDescriptorPool(get_device().get_handle(), &descriptor_pool_create_info, nullptr, &descriptor_pool));
 }
@@ -1427,8 +1427,9 @@ bool TextureLoading::prepare(const vkb::ApplicationOptions& options)
 
 	prepare_pipelines();
 	prepare_pipeline_bg();
-	prepare_pipeline_point();
 	prepare_pipeline_point_line();
+	prepare_pipeline_point();
+	
 
 	float z = -2.0f;
 	float testPoint[] = {
@@ -1440,8 +1441,6 @@ bool TextureLoading::prepare(const vkb::ApplicationOptions& options)
 		0,0.5,z,
 		1,1,z,
 	};
-	int pointCount = sizeof(testPoint) / (3*4);
-	update_point_vertex_buffer(testPoint, pointCount);
 
 	float testPoint_line[] = {
 		0,0,z,
@@ -1452,6 +1451,8 @@ bool TextureLoading::prepare(const vkb::ApplicationOptions& options)
 		0 + 0.1,0.5,z,
 		1 + 0.1,1,z,
 	};
+
+	update_point_vertex_buffer(testPoint, sizeof(testPoint) / (3 * 4));
 	update_point_vertex_buffer_line(testPoint_line, sizeof(testPoint_line) / (3 * 4));
 	
 	prepared = true;
@@ -1947,21 +1948,21 @@ void TextureLoading::update_point_vertex_buffer_line(float* pos, int count)
 {
 	std::lock_guard<std::mutex> lock(mtx_point_line);
 	if (count <= 0) {
-		count = 0;
+		point_count_line = 0;
 		return; // 没有点数据，无需更新
 	}
 
-	point_count = count;
+	point_count_line = count;
 
 	// 1. 准备顶点数据
-	std::vector<PointVertex> vertices(point_count);
+	std::vector<PointVertex> vertices(point_count_line);
 	// 假设 pos 数组是 [x0,y0,z0,x1,y1,z1,...]
 	// 为了可视化，这里简单地将坐标映射为颜色 (0-1范围)
 	float min_x = std::numeric_limits<float>::max(), max_x = std::numeric_limits<float>::lowest();
 	float min_y = std::numeric_limits<float>::max(), max_y = std::numeric_limits<float>::lowest();
 	float min_z = std::numeric_limits<float>::max(), max_z = std::numeric_limits<float>::lowest();
 
-	for (int i = 0; i < point_count; ++i) {
+	for (int i = 0; i < point_count_line; ++i) {
 		float x = pos[i * 3 + 0];
 		float y = pos[i * 3 + 1];
 		float z = pos[i * 3 + 2];
@@ -1976,7 +1977,7 @@ void TextureLoading::update_point_vertex_buffer_line(float* pos, int count)
 	if (range_y == 0) range_y = 1.0f;
 	if (range_z == 0) range_z = 1.0f;
 
-	for (int i = 0; i < point_count; ++i) {
+	for (int i = 0; i < point_count_line; ++i) {
 		vertices[i].x = pos[i * 3 + 0];
 		vertices[i].y = pos[i * 3 + 1];
 		vertices[i].z = pos[i * 3 + 2];
@@ -1987,7 +1988,7 @@ void TextureLoading::update_point_vertex_buffer_line(float* pos, int count)
 	}
 
 	// 2. 更新或创建顶点缓冲区
-	VkDeviceSize buffer_size = sizeof(PointVertex) * point_count;
+	VkDeviceSize buffer_size = sizeof(PointVertex) * point_count_line;
 
 	if (!vertex_buffer_point_line || vertex_buffer_point_line->get_size() < buffer_size) {
 		// 如果缓冲区不存在或太小，则重新创建