cube.h

#ifndef OE_SCENE_PRIMITIVE_CUBE_H
#define OE_SCENE_PRIMITIVE_CUBE_H
 
#include "../mesh.h"
#include <numeric> // to use iota
 
namespace oe::scene::primitive
{
    //template <typename VertexType = Vertex>
    class Cube : public Mesh
    {
        public:
            Cube(const bool mirror_textures = false)
            {
                auto generateTexCoords = [mirror_textures](const glm::vec2& input) -> glm::vec2
                {
                    return glm::vec2((mirror_textures ? (1.f-input.x) : input.x), input.y);
                };
 
                /*ComplexMesh<VertexType>::*/_vertices =
                {
                    {.position = glm::vec3( 0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
 
                    {.position = glm::vec3(-0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
                    {.position = glm::vec3( 0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3(-0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
 
                    {.position = glm::vec3(-0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3(-0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
 
                    {.position = glm::vec3( 0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
                    {.position = glm::vec3( 0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
 
                    {.position = glm::vec3(-0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
                    {.position = glm::vec3( 0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f, -0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
 
                    {.position = glm::vec3( 0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 1.0f))},
                    {.position = glm::vec3(-0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3(-0.5f,  0.5f, -0.5f), .tex_coords = generateTexCoords(glm::vec2(1.0f, 0.0f))},
                    {.position = glm::vec3(-0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 0.0f))},
                    {.position = glm::vec3( 0.5f,  0.5f,  0.5f), .tex_coords = generateTexCoords(glm::vec2(0.0f, 1.0f))}
                };
 
                std::vector<index_t> indices(/*ComplexMesh<VertexType>::*/_vertices.size());
                std::iota(indices.begin(), indices.end(), 0);
 
                /*ComplexMesh<VertexType>::*/_indices.push_back(indices);
 
                /*ComplexMesh<VertexType>::*/_aabb = {glm::vec3(-0.5f), glm::vec3(0.5f)};
 
                /*ComplexMesh<VertexType>::*/generateSmoothNormals();
                /*ComplexMesh<VertexType>::*/generateTangents();
            }
    };
}
 
#endif