551455-graphics-programming-2526-the-repo-Zyb3rWolfi/TheRepo/TheLabs/ShapeFactory.cs

namespace TheLabs;

public static class ShapeFactory
{
    public static Mesh CreateTexturedCube()
    {
        float[] vertices = {
            // Front face (z = +0.5)
            -0.5f, -0.5f,  0.5f,  0f, 0f, // Bottom-left
            0.5f, -0.5f,  0.5f,  1f, 0f, // Bottom-right
            0.5f,  0.5f,  0.5f,  1f, 1f, // Top-right
            -0.5f,  0.5f,  0.5f,  0f, 1f, // Top-left
        
            // Back face (z = -0.5)
            -0.5f, -0.5f, -0.5f,  1f, 0f, // Bottom-left
            0.5f, -0.5f, -0.5f,  0f, 0f, // Bottom-right
            0.5f,  0.5f, -0.5f,  0f, 1f, // Top-right
            -0.5f,  0.5f, -0.5f,  1f, 1f, // Top-left
        
            // Left face (x = -0.5)
            -0.5f, -0.5f, -0.5f,  0f, 0f, // Bottom-left
            -0.5f, -0.5f,  0.5f,  1f, 0f, // Bottom-right
            -0.5f,  0.5f,  0.5f,  1f, 1f, // Top-right
            -0.5f,  0.5f, -0.5f,  0f, 1f, // Top-left   
            // Right face (x = +0.5)
            0.5f, -0.5f, -0.5f,  1f, 0f, // Bottom-left
            0.5f, -0.5f,  0.5f,  0f, 0f, // Bottom-right
            0.5f,  0.5f,  0.5f,  0f, 1f, // Top-right
            0.5f,  0.5f, -0.5f,  1f, 1f, // Top-left
        
            // Top face (y = +0.5)
            -0.5f,  0.5f, -0.5f,  0f, 1f, // Bottom-left
            0.5f,  0.5f, -0.5f,  1f, 1f, // Bottom-right
            0.5f,  0.5f,  0.5f,  1f, 0f, // Top-right
            -0.5f,  0.5f,  0.5f,  0f, 0f, // Top-left
        
            // Bottom face (y = -0.5)
            -0.5f, -0.5f, -0.5f,  1f, 1f, // Bottom-left
            0.5f, -0.5f, -0.5f,  0f, 1f, // Bottom-right
            0.5f, -0.5f,  0.5f,  0f, 0f, // Top-right
            -0.5f, -0.5f,  0.5f,  1f, 0f, // Top-left

        };
        
        uint[] indices = {
            // Front face
            0, 1, 2,
            0, 2, 3,
            // Back face
            4, 5, 6,
            4, 6, 7,
            // Left face
            8, 9, 10,
            8, 10, 11,
            // Right face
            12, 13, 14,
            12, 14, 15,
            // Top face
            16, 17, 18,
            16, 18, 19,
            // Bottom face
            20, 21, 22,
            20, 22, 23
        };
        
        return new Mesh(vertices, indices, Mesh.VertexLayout.PosTex);
    }

    public static Mesh CreateColorCube()
    {
        float[] vertices = {
            // Front face (z = +0.5)
            -0.5f, -0.5f,  0.5f,  1f, 0f, 0f, 1f, // Bottom-left
            0.5f, -0.5f,  0.5f,  1f, 0f, 0f, 1f, // Bottom-right
            0.5f,  0.5f,  0.5f,  0f, 0f, 0f, 1f, // Top-right
            -0.5f,  0.5f,  0.5f,  1f, 0f, 0f, 1f, // Top-left

            // Back face (z = -0.5)
            -0.5f, -0.5f, -0.5f,  1f, 0f, 1f, 1f, // Bottom-left
            0.5f, -0.5f, -0.5f,  0f, 1f, 1f, 1f, // Bottom-right
            0.5f,  0.5f, -0.5f,  1f, 1f, 1f, 1f, // Top-right
            -0.5f,  0.5f, -0.5f,  0.5f, 0.5f, 0.5f, 1f // Top-left
        };
        
        uint[] indices = {
            // Front face
            0, 1, 2,
            2, 3, 0,

            // Back face
            4, 5, 6,
            6, 7, 4,

            // Left face
            4, 0, 3,
            3, 7, 4,

            // Right face
            1, 5, 6,
            6, 2, 1,

            // Top face
            3, 2, 6,
            6, 7, 3,

            // Bottom face
            4, 5, 1,
            1, 0, 4
        };
        
        return new Mesh(vertices, indices, Mesh.VertexLayout.PosColor);
    }
    
    // You'd also add CreateCircle, CreateCylinder, etc.
    // Your Cylinder should be ONE mesh, not 3 draw calls.
    // Generate the top, bottom, and side vertices into one
    // big array and use one EBO for all of it.
}