plane.h

#ifndef OE_SCENE_PRIMITIVE_PLANE_H
#define OE_SCENE_PRIMITIVE_PLANE_H
 
#include "../mesh.h"
 
namespace oe::scene::primitive
{
    class Plane : public Mesh
    {
        public:
            Plane()
            {
                /*
                 Vertices are layed like this :
                 (view from above)
 
                 ^
                 X
                   0 1
                   2 3
                 O    Z >
 
                 We will draw the plane as 2 triangles 021 and 123
                */
 
                _vertices =
                {
                    {.position = glm::vec3( 0.5f, 0.f, -0.5f), .tex_coords = glm::vec2(0.f, 0.f), .normal = glm::vec3( 0.f, 1.f, 0.f)},
                    {.position = glm::vec3( 0.5f, 0.f,  0.5f), .tex_coords = glm::vec2(1.f, 0.f), .normal = glm::vec3( 0.f, 1.f, 0.f)},
                    {.position = glm::vec3(-0.5f, 0.f, -0.5f), .tex_coords = glm::vec2(0.f, 1.f), .normal = glm::vec3( 0.f, 1.f, 0.f)},
                    {.position = glm::vec3(-0.5f, 0.f,  0.5f), .tex_coords = glm::vec2(1.f, 1.f), .normal = glm::vec3( 0.f, 1.f, 0.f)},
                };
 
                _indices = {{
                    0, 2, 1, // Up-left triangle
                    1, 2, 3  // lower-right triangle
                }};
 
                // Use a flat bounding box
                _aabb = {glm::vec3(-0.5f, 0.f, -0.5f), glm::vec3(0.5f, 0.f, 0.5f)};
 
                generateTangents();
            }
    };
}
 
#endif