avoid zero vertex draw calls

[blank.git] / src / graphics / PrimitiveMesh.hpp

diff --git a/src/graphics/PrimitiveMesh.hpp b/src/graphics/PrimitiveMesh.hpp
index 1aa3cce58acf417e6605fe82f99c2d473845ed1c..577321a73e8204e281a265c8402d193900445cbe 100644 (file)
--- a/src/graphics/PrimitiveMesh.hpp
+++ b/src/graphics/PrimitiveMesh.hpp
@@ -10,11 +10,13 @@
 
 namespace blank {
 
+struct AABB;
+
 class PrimitiveMesh {
 
 public:
        using Position = glm::vec3;
-       using Color = glm::vec4;
+       using Color = glm::tvec4<unsigned char>;
        using Index = unsigned short;
 
        using Positions = std::vector<Position>;
@@ -48,10 +50,15 @@ public:
 
                void FillRect(
                        float w, float h,
-                       const glm::vec4 &color = glm::vec4(0.0f),
+                       const Color &color = Color(0),
                        const glm::vec2 &pivot = glm::vec2(0.0f)
                );
 
+               void OutlineBox(
+                       const AABB &,
+                       const Color &color = Color(0)
+               );
+
        };
 
        using VAO = VertexArray<ATTRIB_COUNT>;
@@ -59,8 +66,14 @@ public:
 public:
        void Update(const Buffer &) noexcept;
 
-       void DrawLines() noexcept;
-       void DrawTriangles() noexcept;
+       bool Empty() const noexcept {
+               return vao.Empty();
+       }
+
+       void DrawLines() const noexcept;
+       void DrawTriangles() const noexcept {
+               vao.DrawTriangleElements();
+       }
 
 private:
        VAO vao;