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archive/old_display_system/display/mesh/sphere.h

@@ -0,0 +1,47 @@
+/**
+ * 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
+);