Tip: use Stride for easily plotting a field in array of structures

[ocornut]

Nothing new and surprising but again people may not think about that.
Here I've got some code sampling joints of an animation as e.g 60 hz.
And I can plot that directly from the joint structure without copying the data around one more time

int stride = skel.getBoneCount() * sizeof(JointTransform);
ImGui::PlotLines("RightFoot y", &all_sampled_joints[skel.getBoneIndex("RightFoot")].translation.y, samples, 0, NULL, FLT_MAX, FLT_MAX, ImVec2(0,0), stride);
ImGui::PlotLines("RightToeBase y", &all_sampled_joints[skel.getBoneIndex("RightToeBase")].translation.y, samples, 0, NULL, FLT_MAX, FLT_MAX, ImVec2(0,0), stride);
ImGui::PlotLines("LeftFoot y", &all_sampled_joints[skel.getBoneIndex("LeftFoot")].translation.y, samples, 0, NULL, FLT_MAX, FLT_MAX, ImVec2(0,0), stride);
ImGui::PlotLines("LeftToeBase y", &all_sampled_joints[skel.getBoneIndex("LeftToeBase")].translation.y, samples, 0, NULL, FLT_MAX, FLT_MAX, ImVec2(0,0), stride);

[ocornut]

Also if you are using C++11 you can use lambdas

ImGui::PlotLines("Sin", [](void*data, int idx) { return sinf(idx*0.2f); }, NULL, 100);
ImGui::PlotLines("Cos", [](void*data, int idx) { return cosf(idx*0.2f); }, NULL, 100);

Bit awkward with sample indices to plot an actual math function. Ideally here we could introduce variants of plot that use all floats. Will probably add something.

Likewise for combo boxes, don't copy data around creating list of strings! Use a function to retrieve your data from whatever format it is naturally. The whole plot API is a little awkward and could be reworked along with adding some form of iterator scheme for sparse combo / list-box.