Refactoring cutscenes

src/render/UiQuad.h

@@ -0,0 +1,65 @@
+#pragma once
+
+#include "render/Renderer.h"
+#include "UiManager.h"
+#include <Eigen/Core>
+
+namespace ZL
+{
+	// Axis-aligned textured quad with cached mesh. Rebuild only when rect changes.
+	struct UiQuad {
+		UiRect rect{};
+		VertexRenderStruct mesh;
+		bool initialized = false;
+
+		void rebuild(const UiRect& newRect) {
+			rect = newRect;
+			mesh.data = CreateRect2D(
+				{ rect.x + rect.w * 0.5f, rect.y + rect.h * 0.5f },
+				{ rect.w * 0.5f, rect.h * 0.5f },
+				0.0f
+			);
+			mesh.RefreshVBO();
+			initialized = true;
+		}
+
+		void rebuildWithUV(
+			const UiRect& newRect,
+			const Eigen::Vector2f& uvBottomLeft,
+			const Eigen::Vector2f& uvTopLeft,
+			const Eigen::Vector2f& uvTopRight,
+			const Eigen::Vector2f& uvBottomRight
+		) {
+			rect = newRect;
+
+			const float x0 = rect.x;
+			const float y0 = rect.y;
+			const float x1 = rect.x + rect.w;
+			const float y1 = rect.y + rect.h;
+
+			VertexDataStruct data;
+			data.PositionData = {
+				{ x0, y0, 0.0f },
+				{ x0, y1, 0.0f },
+				{ x1, y1, 0.0f },
+
+				{ x1, y1, 0.0f },
+				{ x1, y0, 0.0f },
+				{ x0, y0, 0.0f }
+			};
+			data.TexCoordData = {
+				uvBottomLeft,
+				uvTopLeft,
+				uvTopRight,
+
+				uvTopRight,
+				uvBottomRight,
+				uvBottomLeft
+			};
+
+			mesh.AssignFrom(data);
+			initialized = true;
+		}
+	};
+
+}