"""Tiger: its outside in its own (Tender) frame for the checks against the ship and the docking arm (the cockpit left out):
  checks/tiger_points.npy   every vertex and face centre, tool arm folded down (docking)
  checks/tiger_tris.npz     all triangles (v, t, names), tool arm folded down
  checks/tiger_points_armaft.npy  the same points with the tool arm pointing aft (as the picture draws it)
blender -b Tender_Tiger.blend --python build/tg_dump.py   (the file is not saved; the handle is put back)"""
import bpy
import os
import numpy as np

HERE = os.path.dirname(os.path.abspath(__file__))
root = bpy.data.objects["Tiger_Root"]
NAMES = ("SM_Tiger_Hull", "SM_Tiger_Glass", "SM_Tiger_ToolArm")


def refresh():
    for ob in bpy.data.objects:
        if ob.animation_data:
            for fc in ob.animation_data.drivers:
                fc.driver.expression = fc.driver.expression
                fc.driver.is_valid = True
            ob.update_tag()
    root.update_tag()
    bpy.context.view_layer.update()


def collect():
    dg = bpy.context.evaluated_depsgraph_get()
    V, T, N, P, off = [], [], [], [], 0
    for n in NAMES:
        o = bpy.data.objects[n]
        ev = o.evaluated_get(dg)
        me = ev.to_mesh()
        me.calc_loop_triangles()
        M = np.array(ev.matrix_world)
        co = np.empty(len(me.vertices) * 3)
        me.vertices.foreach_get("co", co)
        co = co.reshape(-1, 3) @ M[:3, :3].T + M[:3, 3]
        tr = np.empty(len(me.loop_triangles) * 3, np.int64)
        me.loop_triangles.foreach_get("vertices", tr)
        tr = tr.reshape(-1, 3)
        ev.to_mesh_clear()
        V.append(co)
        T.append(tr + off)
        N += [n] * len(tr)
        P.append(np.concatenate([co, co[tr].mean(1)]))
        off += len(co)
    return np.concatenate(V), np.concatenate(T), np.array(N), np.concatenate(P)


keep = root.get("tool_arm_down_deg", 0.0)
root["tool_arm_down_deg"] = 0.0
refresh()
v, t, n, p_aft = collect()
np.save(os.path.join(HERE, "checks", "tiger_points_armaft.npy"), p_aft)
root["tool_arm_down_deg"] = 90.0
refresh()
v, t, n, p = collect()

np.save(os.path.join(HERE, "checks", "tiger_points.npy"), p)
np.savez(os.path.join(HERE, "checks", "tiger_tris.npz"), v=v, t=t, names=n)
root["tool_arm_down_deg"] = keep
refresh()
print("DUMP", len(v), len(t), "y range %.3f .. %.3f" % (p[:, 1].min(), p[:, 1].max()),
      "armaft y max %.3f" % p_aft[:, 1].max())