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终于把线画出来了。

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xsl
2025-09-21 21:50:28 +08:00
parent 365387b8d9
commit 628597fe59
1 changed files with 11 additions and 10 deletions
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samples/api/texture_loading/texture_loading.cpp
+11 -10
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@@ -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