/**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#pragma once
#include "display/mesh/mesh.h"
#include "display/color.h"

#define SPHERE_STACKS 8
#define SPHERE_SECTORS 16
#define SPHERE_VERTEX_COUNT (SPHERE_STACKS * SPHERE_SECTORS * 6)
#define SPHERE_PRIMITIVE_TYPE MESH_PRIMITIVE_TYPE_TRIANGLES

extern mesh_t SPHERE_MESH_SIMPLE;
extern meshvertex_t SPHERE_MESH_SIMPLE_VERTICES[SPHERE_VERTEX_COUNT];

/**
 * Initializes the simple unit sphere mesh centered at (0,0,0) with radius 0.5.
 *
 * @return Error for initialization of the sphere mesh.
 */
errorret_t sphereInit();

/**
 * Buffers a UV sphere into the provided vertex array.
 * Writes stacks * sectors * 6 vertices (CCW winding).
 *
 * @param vertices  Vertex array to write into (must hold stacks*sectors*6).
 * @param center    Center position of the sphere.
 * @param radius    Radius of the sphere.
 * @param stacks    Number of horizontal rings (latitude bands).
 * @param sectors   Number of vertical segments (longitude slices).
 * @param color     Color applied to all vertices.
 */
void sphereBuffer(
  meshvertex_t *vertices,
  const vec3 center,
  const float_t radius,
  const int32_t stacks,
  const int32_t sectors
  #if MESH_ENABLE_COLOR
    , const color_t color
  #endif
);