diff --git a/samples/api/texture_loading/texture_loading.cpp b/samples/api/texture_loading/texture_loading.cpp
index b3fe47c..f521bfa 100644
--- a/samples/api/texture_loading/texture_loading.cpp
+++ b/samples/api/texture_loading/texture_loading.cpp
@@ -573,7 +573,7 @@ void TextureLoading::build_command_buffers()
 
 		//vkCmdDrawIndexed(draw_cmd_buffers[i], index_count, 1, 0, 0, 0);
 
-		draw_point_cloud(draw_cmd_buffers[i]);
+		//draw_point_cloud(draw_cmd_buffers[i]);
 		draw_point_cloud_line(draw_cmd_buffers[i]);
 
 		//draw_ui(draw_cmd_buffers[i]);
@@ -1336,7 +1336,7 @@ void TextureLoading::prepare_pipeline_point_line()
 
 	// 输入装配 (绘制点列表)
 	VkPipelineInputAssemblyStateCreateInfo input_assembly_state{ VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO };
-	input_assembly_state.topology = VK_PRIMITIVE_TOPOLOGY_LINE_STRIP;// VK_PRIMITIVE_TOPOLOGY_LINE_LIST;
+	input_assembly_state.topology = VK_PRIMITIVE_TOPOLOGY_LINE_LIST;
 	input_assembly_state.primitiveRestartEnable = VK_FALSE;
 
 	// 光栅化
@@ -1383,8 +1383,8 @@ void TextureLoading::prepare_pipeline_point_line()
 	std::array<VkPipelineShaderStageCreateInfo, 2> shader_stages;
 	//shader_stages[0] = load_shader("texture_loading", "point_line.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
 	//shader_stages[1] = load_shader("texture_loading", "point_line.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
-	shader_stages[0] = load_shader("texture_loading", "point_line_solid.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
-	shader_stages[1] = load_shader("texture_loading", "point_line_solid.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
+	shader_stages[0] = load_shader("texture_loading", "point_line.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
+	shader_stages[1] = load_shader("texture_loading", "point_line.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
 
 	// 创建图形管线
 	VkGraphicsPipelineCreateInfo pipeline_create_info{ VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO };
@@ -2000,7 +2000,8 @@ void add_point(float* src, float* dest, int index)
 void TextureLoading::demo1(float* pos)
 {
 	point_index = 0;
-	std::vector<int> pointIndex= { 233,232,231,230,229,118,36,49,209,217,188,233};
+	//std::vector<int> pointIndex= { 233,232,231,230,229,118,36,49,209,217,188,233};
+	std::vector<int> pointIndex = { 389,368,383,353,342,467,263,466,388,387,386,385,384,398,463,464,465,351,6,122,245,244,243,173,157,158,159,160,161,246,33,247,113,124,156,139,162,21,54,103,67,109,10,338,297,332,284,251,389 };
 	float points[100 * 3];
 	for (int i = 0; i < pointIndex.size(); ++i)
 	{
@@ -2059,14 +2060,13 @@ void TextureLoading::update_point_vertex_buffer_line(float* pos, int count, floa
 		return; // 没有点数据，无需更新
 	}
 
-	point_count_line = count;
 
 	glm::vec3 color = { r,g,b };
 
 	// 1. 准备顶点数据
 	std::vector<LineVertex> vertices;
 
-	for (int i = 0; i < point_count_line - 1; ++i) 
+	for (int i = 0; i < count - 1; ++i) 
 	{
 
 		const glm::vec3& start = {pos[i*3], pos[i * 3+1], pos[i * 3+2] };
@@ -2089,6 +2089,8 @@ void TextureLoading::update_point_vertex_buffer_line(float* pos, int count, floa
 			});
 	}
 
+	point_count_line = vertices.size();
+
 	// 2. 更新或创建顶点缓冲区
 	VkDeviceSize buffer_size = sizeof(LineVertex) * point_count_line;