*misc

1 files changed, 52 insertions, 0 deletions

diff --git a/Runtime/GUI/UISquare.cpp b/Runtime/GUI/UISquare.cpp
new file mode 100644
index 0000000..214435e
--- /dev/null
+++ b/Runtime/GUI/UISquare.cpp
@@ -0,0 +1,52 @@
+#include "../Graphics/GfxDevice.h"
+#include "UISquare.h"
+#include "Runtime/Math/Math.h"
+
+struct UISquareLayout
+{
+    Vector2 position;
+};
+
+static CustomVertexLayout layout;
+
+InitializeStaticVariables([]() {
+    VertexAttributeDescriptor POSITION = VertexAttributeDescriptor(0, 2, VertexAttrFormat_Float, sizeof(UISquareLayout));
+
+    layout.attributes.push_back(POSITION);
+});
+
+void UISquare::Draw()
+{
+    const int nVerts = 4;
+    const int nIndices = 6;
+
+    float pos[] = {
+        m_Left,  m_Bottom, // left-bottom
+        m_Right, m_Bottom, // right-bottom
+        m_Right, m_Top,    // right-top
+        m_Left,  m_Top,    // top-left
+    };
+
+    int indices[] = {
+        0, 1, 3, // right-top  
+        1, 2, 3, // left-bottom
+    };
+
+    uint8* vb;
+    uint16* ib;
+
+    g_SharedVBO.GetChunk(sizeof(UISquareLayout), sizeof(uint16), 4, 6, Primitive_Triangle, (void**)&vb, (void**)&ib);
+
+    UISquareLayout* dst = (UISquareLayout*)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(4, 6);
+    g_SharedVBO.DrawChunk(layout);
+}
\ No newline at end of file