4 files changed, 73 insertions, 5 deletions
diff --git a/Runtime/GUI/UILine.cpp b/Runtime/GUI/UILine.cpp
new file mode 100644
index 0000000..8db681e
--- /dev/null
+++ b/Runtime/GUI/UILine.cpp
@@ -0,0 +1,48 @@
+#include "UILine.h"
+
+struct UILineLayout
+{
+	Vector2 position;
+};
+
+static CustomVertexLayout layout;
+
+InitializeStaticVariables([]() {
+	VertexAttributeDescriptor POSITION = VertexAttributeDescriptor(0, 2, VertexAttrFormat_Float, sizeof(UILineLayout));
+
+	layout.attributes.push_back(POSITION);
+});
+
+void UILine::Draw()
+{
+	const int nVerts = 2;
+	const int nIndices = 2;
+
+	float pos[] = {
+		m_From.x, m_From.y,
+		m_To.x, m_To.y,
+	};
+
+	uint16 indices[] = {
+		0, 1
+	};
+
+
+	uint8* vb;
+	uint16* ib;
+
+	g_SharedVBO.GetChunk(sizeof(UILineLayout), sizeof(uint16), nVerts, nIndices, Primitive_Line, (void**)&vb, (void**)&ib);
+
+	UILineLayout* dst = (UILineLayout*)vb;
+
+	for (int i = 0; i < nVerts; ++i)
+	{
+		dst[i].position.Set(pos[2 * i], pos[2 * i + 1]);
+	}
+
+	for (int i = 0; i < nIndices; ++i)
+		ib[i] = indices[i];
+
+	g_SharedVBO.ReleaseChunk(nVerts, nIndices);
+	g_SharedVBO.DrawChunk(layout);
+}
+\ No newline at end of file
diff --git a/Runtime/GUI/UILine.h b/Runtime/GUI/UILine.h
new file mode 100644
index 0000000..a47b1f1
--- /dev/null
+++ b/Runtime/GUI/UILine.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include "../Utilities/StaticInitiator.h"
+#include "UIMesh.h"
+
+class UILine : public UIMesh
+{
+public: 
+	UILine(Vector2f from, Vector2f to)
+	{
+		m_From = from; 
+		m_To = to;
+	}
+
+	void Draw() override;
+
+private: 
+	Vector2f m_From;
+	Vector2f m_To;
+
+};
diff --git a/Runtime/GUI/UIMesh.h b/Runtime/GUI/UIMesh.h
index 8b6b56d..1de111b 100644
--- a/Runtime/GUI/UIMesh.h
+++ b/Runtime/GUI/UIMesh.h
@@ -9,6 +9,7 @@
 #include "Runtime/Graphics/Color.h"
 #include "Runtime/Graphics/GfxDevice.h"
 
+// UI默认的顶点布局
 struct UIVertexLayout
 {
     UIVertexLayout(Vector2 pos = Vector2::zero, Vector2 texCoord = Vector2::zero, Color32 col = Color32())
diff --git a/Runtime/GUI/UIQuad.cpp b/Runtime/GUI/UIQuad.cpp
index c57685c..269b805 100644
--- a/Runtime/GUI/UIQuad.cpp
+++ b/Runtime/GUI/UIQuad.cpp
@@ -30,8 +30,6 @@ void UIQuad::Draw()
 		m_Left,  m_Top,    // top-left
 	};
 
-    int n = sizeof(Vector2);
-
 	float uv[] = {
 		0, 0,
 		1, 0,
@@ -39,7 +37,7 @@ void UIQuad::Draw()
 		0, 1,
 	};
 
-	int indices[] = {
+	uint16 indices[] = {
 		0, 1, 3, // right-top  
 		1, 2, 3, // left-bottom
 	};
@@ -47,7 +45,7 @@ void UIQuad::Draw()
 	uint8* vb;
 	uint16* ib;
 	
-	g_SharedVBO.GetChunk(sizeof(UIQuadLayout), sizeof(uint16), 4, 6, Primitive_Triangle, (void**)&vb, (void**)&ib);
+	g_SharedVBO.GetChunk(sizeof(UIQuadLayout), sizeof(uint16), nVerts, nIndices, Primitive_Triangle, (void**)&vb, (void**)&ib);
 
 	UIQuadLayout* dst = (UIQuadLayout*)vb;
 
@@ -60,6 +58,6 @@ void UIQuad::Draw()
 	for (int i = 0; i < nIndices; ++i)
 		ib[i] = indices[i];
 
-	g_SharedVBO.ReleaseChunk(4, 6);
+	g_SharedVBO.ReleaseChunk(nVerts, nIndices);
 	g_SharedVBO.DrawChunk(layout);
 }
 \ No newline at end of file