83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
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#include "SceneViewportOverlayRenderer.h"
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#include "SceneViewportMath.h"
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namespace XCEngine {
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namespace Editor {
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namespace {
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Math::Matrix4x4 BuildOverlayViewMatrix(const SceneViewportOverlayData& overlay) {
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return BuildSceneViewportViewMatrix(overlay);
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}
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void DrawAxisLabel(ImDrawList* drawList, const ImVec2& position, const char* label, ImU32 color) {
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if (drawList == nullptr || label == nullptr) {
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return;
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}
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const ImVec2 labelSize = ImGui::CalcTextSize(label);
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drawList->AddText(
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ImVec2(position.x - labelSize.x * 0.5f, position.y - labelSize.y * 0.5f),
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color,
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label);
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}
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void DrawSceneAxisWidget(
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ImDrawList* drawList,
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const SceneViewportOverlayData& overlay,
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const ImVec2& viewportMin,
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const ImVec2& viewportMax) {
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if (drawList == nullptr || !overlay.valid) {
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return;
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}
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const Math::Matrix4x4 view = BuildOverlayViewMatrix(overlay);
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const ImVec2 center(viewportMax.x - 52.0f, viewportMin.y + 52.0f);
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const float radius = 25.0f;
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drawList->AddCircleFilled(center, radius + 12.0f, IM_COL32(17, 19, 22, 178), 24);
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drawList->AddCircle(center, radius + 12.0f, IM_COL32(255, 255, 255, 30), 24, 1.0f);
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struct AxisLine {
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Math::Vector3 axis;
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const char* label;
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ImU32 color;
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};
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const AxisLine axes[] = {
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{ Math::Vector3::Right(), "x", IM_COL32(239, 83, 80, 255) },
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{ Math::Vector3::Up(), "y", IM_COL32(102, 187, 106, 255) },
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{ Math::Vector3::Forward(), "z", IM_COL32(66, 165, 245, 255) }
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};
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for (const AxisLine& axis : axes) {
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const Math::Vector3 viewAxis = view.MultiplyVector(axis.axis);
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const ImVec2 end(
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center.x + viewAxis.x * radius,
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center.y - viewAxis.y * radius);
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drawList->AddLine(center, end, axis.color, 2.0f);
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drawList->AddCircleFilled(end, 6.0f, axis.color, 16);
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DrawAxisLabel(drawList, end, axis.label, IM_COL32(245, 245, 245, 255));
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}
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}
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} // namespace
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void DrawSceneViewportOverlay(
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ImDrawList* drawList,
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const SceneViewportOverlayData& overlay,
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const ImVec2& viewportMin,
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const ImVec2& viewportMax,
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const ImVec2& viewportSize) {
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if (drawList == nullptr || !overlay.valid || viewportSize.x <= 1.0f || viewportSize.y <= 1.0f) {
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return;
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}
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drawList->PushClipRect(viewportMin, viewportMax, true);
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DrawSceneAxisWidget(drawList, overlay, viewportMin, viewportMax);
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drawList->PopClipRect();
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}
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} // namespace Editor
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} // namespace XCEngine
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