added AddLine() drawlist function

DrawList.go

@@ -105,6 +105,18 @@ const (
 	DrawCornerFlagsAll      = 0xF
 )
 
+// AddLine call AddLineV with a thickness value of 1.0
+func (list DrawList) AddLine(p1 Vec2, p2 Vec2, col PackedColor) {
+	list.AddLineV(p1, p2, col, 1.0)
+}
+
+// AddLineV adds a line to draw list, extending from point p1 to p2
+func (list DrawList) AddLineV(p1 Vec2, p2 Vec2, col PackedColor, thickness float32) {
+	p1Arg, _ := p1.wrapped()
+	p2Arg, _ := p2.wrapped()
+	C.iggAddLine(list.handle(), p1Arg, p2Arg, C.IggPackedColor(col), C.float(thickness))
+}
+
 // AddRect calls AddRectV with rounding and thickness values of 1.0 and
 // DrawCornerFlagsAll
 func (list DrawList) AddRect(min Vec2, max Vec2, col PackedColor) {

DrawListWrapper.cpp

@@ -41,6 +41,15 @@ void iggGetVertexBufferLayout(size_t *entrySize, size_t *posOffset, size_t *uvOf
    *colOffset = IM_OFFSETOF(ImDrawVert, col);
 }
 
+void iggAddLine(IggDrawList handle, IggVec2 const *p1, IggVec2 const *p2, IggPackedColor col, float thickness)
+{
+   Vec2Wrapper p1Arg(p1);
+   Vec2Wrapper p2Arg(p2);
+
+   ImDrawList *list = reinterpret_cast<ImDrawList *>(handle);
+   list->AddLine(*p1Arg, *p2Arg, col, thickness);
+}
+
 void iggAddRect(IggDrawList handle, IggVec2 const *min, IggVec2 const *max, IggPackedColor col, float rounding, int flags, float thickness)
 {
    Vec2Wrapper minArg(min);

DrawListWrapper.h

@@ -15,6 +15,7 @@ extern void iggDrawListGetRawVertexBuffer(IggDrawList handle, void **data, int *
 extern void iggGetIndexBufferLayout(size_t *entrySize);
 extern void iggGetVertexBufferLayout(size_t *entrySize, size_t *posOffset, size_t *uvOffset, size_t *colOffset);
 
+extern void iggAddLine(IggDrawList handle, IggVec2 const *p1, IggVec2 const *p2, IggPackedColor col, float thickness);
 extern void iggAddRect(IggDrawList handle, IggVec2 const *min, IggVec2 const *max, IggPackedColor col, float rounding, int flags, float thickness);
 extern void iggAddRectFilled(IggDrawList handle, IggVec2 const *min, IggVec2 const *max, IggPackedColor col, float rounding, int flags);
 extern void iggAddCircle(IggDrawList handle, IggVec2 const *center, float radius, IggPackedColor col, int numSegments, float thickness);