imgui: nametag widget

code/framework/src/external/imgui/widgets/nametag.h

@@ -0,0 +1,40 @@
+/*
+ * MafiaHub OSS license
+ * Copyright (c) 2021-2023, MafiaHub. All rights reserved.
+ *
+ * This file comes from MafiaHub, hosted at https://github.com/MafiaHub/Framework.
+ * See LICENSE file in the source repository for information regarding licensing.
+ */
+
+#pragma once
+
+#include <fmt/format.h>
+#include <imgui/imgui.h>
+
+#include <string>
+
+namespace Framework::External::ImGUI::Widgets {
+    void DrawNameTag(ImVec2 screenPos, const char *label, float healthPercent, float healthBarWidth = 50.0f, float healthBarHeight = 8.0f) {
+        ImDrawList *drawList = ImGui::GetBackgroundDrawList();
+
+        const ImVec2 textSize     = ImGui::CalcTextSize(label);
+        const float halfTextWidth = textSize.x / 2.0f;
+        drawList->AddText(NULL, 16.0f, {screenPos.x - halfTextWidth + 1, screenPos.y + 1}, IM_COL32(0, 0, 0, 255), label);
+        drawList->AddText(NULL, 16.0f, {screenPos.x - halfTextWidth, screenPos.y}, IM_COL32(255, 255, 255, 255), label);
+
+        if (healthBarWidth <= 0.0f || healthBarHeight <= 0.0f)
+            return;
+
+        const float halfHealthBarWidth = healthBarWidth / 2.0f;
+        screenPos.y += 1.2f * textSize.y;
+        drawList->AddRect({screenPos.x - halfHealthBarWidth - 1.0f, screenPos.y}, {screenPos.x + halfHealthBarWidth + 1.0f, screenPos.y + healthBarHeight + 1.0f}, IM_COL32(100, 100, 100, 200));
+        drawList->AddRectFilled({screenPos.x - halfHealthBarWidth, screenPos.y + 1.0f}, {screenPos.x + halfHealthBarWidth, screenPos.y + healthBarHeight}, IM_COL32(0, 0, 0, 175));
+
+        const float alpha               = std::clamp(healthPercent / 100.0f, 0.0f, 1.0f);
+        const ImU32 healthBarLeftColor  = IM_COL32(80, 0, 0, 255);
+        const ImU32 healthBarRightColor = IM_COL32(glm::mix(80, 255, alpha), glm::mix(0, 40, alpha), glm::mix(0, 80, alpha), 255);
+        const ImVec2 healthBarMin       = {screenPos.x - halfHealthBarWidth, screenPos.y + 1.0f};
+        const ImVec2 healthBarMax       = {screenPos.x - halfHealthBarWidth + (alpha * healthBarWidth), screenPos.y + healthBarHeight};
+        drawList->AddRectFilledMultiColor(healthBarMin, healthBarMax, healthBarLeftColor, healthBarRightColor, healthBarRightColor, healthBarLeftColor);
+    }
+} // namespace Framework::External::ImGUI::Widgets