update_drawable_setting (#171)

Author: koide3

include/guik/viewer/async_light_viewer_context.hpp

@@ -45,6 +45,8 @@ class AsyncLightViewerContext {
   void use_arcball_camera_control(double distance = 80.0, double theta = 0.0, double phi = -60.0f * M_PI / 180.0f);
   void use_fps_camera_control(double fovy_deg = 60.0);
 
+  void update_drawable_setting(const std::string& name, const ShaderSetting& shader_setting);
+
   // utility methods to directly create and update drawables
   // PointCloudBuffer
   void update_points(const std::string& name, const float* data, int stride, int num_points, const ShaderSetting& shader_setting);

src/guik/viewer/async_light_viewer_context.cpp

@@ -85,6 +85,17 @@ void AsyncLightViewerContext::use_fps_camera_control(double fovy_deg) {
   guik::viewer()->invoke([=] { context->use_fps_camera_control(fovy_deg); });
 }
 
+void AsyncLightViewerContext::update_drawable_setting(const std::string& name, const ShaderSetting& shader_setting) {
+  guik::viewer()->invoke([=] {
+    auto drawable = context->find_drawable(name);
+    if (!drawable.first || !drawable.second) {
+      std::cerr << "warning: drawable not found (name=" << name << ")" << std::endl;
+      return;
+    }
+    *drawable.first = shader_setting;
+  });
+}
+
 // PointCloudBuffer
 void AsyncLightViewerContext::update_points(const std::string& name, const float* data, int stride, int num_points, const ShaderSetting& shader_setting) {
   std::vector<float> buffer(data, data + stride / sizeof(float) * num_points);

src/python/guik.cpp

@@ -648,6 +648,8 @@ void define_guik(py::module_& m) {
       py::arg("phi") = -60.0 * M_PI / 180.0)
     .def("use_fps_camera_control", &guik::AsyncLightViewerContext::use_fps_camera_control, py::arg("fovy_deg") = 60.0)
 
+    .def("update_drawable_setting", &guik::AsyncLightViewerContext::update_drawable_setting, py::arg("name"), py::arg("setting"))
+
     .def(
       "update_points",
       [](guik::AsyncLightViewerContext& context, const std::string& name, const Eigen::Matrix<float, -1, -1, Eigen::RowMajor>& points, const guik::ShaderSetting& shader_setting) {