Writing JGL library interface

include/JGL/JGL.h

@@ -4,12 +4,42 @@
 #pragma once
 
 // OpenGL Wrapper for rendering 2D graphics primitives in both a 2D and 3D context
-namespace JGL
-{
-    void DrawPixel();
-    void DrawLine();
-    void OutlineCircle();
-    void FillCircle();
+namespace JGL {
+    namespace J2D {
+
+    }
+
+    namespace J3D {
+
+    }
+    struct Color3 {
+        int r;
+        int g;
+        int b;
+    };
+    namespace Colors {
+
+    }
+    struct HSV {
+        float hue;
+        float saturation;
+        float value;
+    };
+
+    Vector2 ScreenToViewport(const Vector2& v);
+    Vector2 ViewportToScreen(const Vector2& v);
+
+    Color3 GetColor();
+    void SetColor(const Color3 &color);
+    void DrawPixel2D(const Color3 &, int x, int y);
+    void DrawPixel2D(const Vector2 &coordinates);
+    void DrawLine2D(const Vector2 &A, const Vector2 &B);
+    void DrawLine3D(const Vector3 &A, const Vector3 &B);
+    void DrawCubicBezierCurve2D();
+    void OutlineCircle2D(const Vector2 center, float radius, int subdivisions, Color3 color);
+    void FillSphere3D();
+    void WireframeSphere3D();
+    void FillCircle2D();
     void OutlineTriangle();
     void FillTriangle();
     void FillTexturedTriangle();
@@ -17,10 +47,26 @@ namespace JGL
     void DrawSprite();
     void DrawPartialSprite();
     void DrawString();
-    void FillRect();
-    void OutlineRect();
-    void OutlinePolygon();
-    void FillPolygon();
-
-    void GradientFillRect();
+    void FillRect2D(const Vector2 &pos, const Vector2 &size, const Color3 &color)
+    {
+        pos = ScreenToViewport(pos);
+        size = ScreenToViewport(size);
+        glBegin(GL_QUADS);
+            glColor3f(color.r, color.g, color.b);
+            glVertex2f(pos.x, pos.y);
+            glVertex2f(pos.x, pos.y + size.y);
+            glVertex2f(pos.x + size.x, pos.y + size.y);
+            glVertex2f(pos.x + size.x, pos.y);
+        glEnd();
+    }
+    void OutlineRect2D       (const Vector2& pos, const Vector2& size, const Color3& color, float thickness = 1);
+    void FillRoundedRect2D   (const Vector2& pos, const Vector2& size, const Color3& color, float radius);
+    void OutlineRoundedRect2D(const Vector2& pos, const Vector2& size, const Color3& color, float radius, float thickness = 1);
+    void OutlinePolygon2D    ();
+    void FillPolygon2D       ();
+    void GradientFillRect2D  ();
+    void DrawMatrixGizmo     (const Matrix3x3&, const Vector3&);
+    void DrawMatrixGizmo     (const Matrix4x4&);
+    void DrawAxisAngleGizmo  (const AxisAngle&,  const Vector3&);
+    void DrawQuaternionGizmo (const Quaternion&, const Vector3&);
 }

main.cpp

@@ -40,6 +40,8 @@ void display() {
         glVertex2f(-0.9f, -0.3f);
     glEnd();
 
+    FillRect2D()
+
     glBegin(GL_TRIANGLES);
         glColor3f(0.0f, 0.0f, 1.f); // Blue
         glVertex2f(0.1f, -0.6f);