draw, editor: visualize bounding boxes

5 files changed, 62 insertions, 3 deletions

diff --git a/draw/quad-floor.hpp b/draw/quad-floor.hpp
index 7a8ec59a..7d974798 100644
--- a/draw/quad-floor.hpp
+++ b/draw/quad-floor.hpp
@@ -13,7 +13,7 @@ struct quad_floor final
     quad_floor(Vector3 center, Vector2 size, float line_width);
 
     static constexpr std::size_t num_vertices = 4, num_indexes = 0;
-    static constexpr GL::MeshPrimitive primitive = GL::MeshPrimitive::LineLoop;
+    static constexpr auto primitive = GL::MeshPrimitive::LineLoop;
 
     using vertex_array = std::array<Vector3, num_vertices>;
 
diff --git a/draw/quad-wall-n.hpp b/draw/quad-wall-n.hpp
index 30d69e01..f07d7d06 100644
--- a/draw/quad-wall-n.hpp
+++ b/draw/quad-wall-n.hpp
@@ -12,7 +12,7 @@ struct quad_wall_n final
     quad_wall_n(Vector3 center, Vector3 size, float line_width);
 
     static constexpr std::size_t num_vertices = 4, num_indexes = 0;
-    static constexpr GL::MeshPrimitive primitive = GL::MeshPrimitive::LineLoop;
+    static constexpr auto primitive = GL::MeshPrimitive::LineLoop;
 
     using vertex_array = std::array<Vector3, num_vertices>;
 
diff --git a/draw/quad-wall-w.hpp b/draw/quad-wall-w.hpp
index fb087865..cca70b30 100644
--- a/draw/quad-wall-w.hpp
+++ b/draw/quad-wall-w.hpp
@@ -12,7 +12,7 @@ struct quad_wall_w final
     quad_wall_w(Vector3 center, Vector3 size, float line_width);
 
     static constexpr std::size_t num_vertices = 4, num_indexes = 0;
-    static constexpr GL::MeshPrimitive primitive = GL::MeshPrimitive::LineLoop;
+    static constexpr auto primitive = GL::MeshPrimitive::LineLoop;
 
     using vertex_array = std::array<Vector3, num_vertices>;
 
diff --git a/draw/quad.cpp b/draw/quad.cpp
new file mode 100644
index 00000000..d7be52f2
--- /dev/null
+++ b/draw/quad.cpp
@@ -0,0 +1,30 @@
+#include "quad.hpp"
+#include "wireframe.hpp"
+#include <Magnum/GL/Renderer.h>
+
+namespace floormat::wireframe {
+
+quad::quad(Vector3 center, Vector2 size, float line_width) :
+    center{center}, size{size}, line_width{line_width}
+{}
+
+quad::vertex_array quad::make_vertex_array() const
+{
+    const auto Sx = size[0]*.5f, Sy = size[1]*.5f;
+    const auto Cx_0 = center[0] - Sx, Cx_1 = center[0] + Sx;
+    const auto Cy_0 = center[1] - Sy, Cy_1 = center[1] + Sy;
+    const auto Cz = center[2] + 0;
+    return {{
+        { Cx_0, Cy_0, Cz },
+        { Cx_1, Cy_0, Cz },
+        { Cx_1, Cy_1, Cz },
+        { Cx_0, Cy_1, Cz },
+    }};
+}
+
+void quad::on_draw() const
+{
+    mesh_base::set_line_width(line_width);
+}
+
+} // namespace floormat::wireframe
diff --git a/draw/quad.hpp b/draw/quad.hpp
new file mode 100644
index 00000000..7bccebae
--- /dev/null
+++ b/draw/quad.hpp
@@ -0,0 +1,29 @@
+#pragma once
+#include <array>
+#include <Corrade/Containers/ArrayViewStl.h>
+#include <Magnum/Math/Vector3.h>
+#include <Magnum/GL/Mesh.h>
+
+namespace floormat::wireframe {
+
+struct quad final
+{
+    quad(Vector3 start, Vector2 size, float line_width);
+
+    static constexpr std::size_t num_vertices = 4, num_indexes = 0;
+    static constexpr GL::MeshPrimitive primitive = GL::MeshPrimitive::LineLoop;
+
+    using vertex_array = std::array<Vector3, num_vertices>;
+    using index_array = std::array<UnsignedShort, num_indexes>;
+
+    vertex_array make_vertex_array() const;
+    static ArrayView<const void> make_index_array() { return {}; }
+    void on_draw() const;
+
+private:
+    Vector3 center;
+    Vector2 size;
+    float line_width = 2;
+};
+
+} // namespace floormat::wireframe