shelf

[pmachines.git] / pmachines / items / item.py

from panda3d.core import CullFaceAttrib, Point3, NodePath, Point2, Texture, \
    Plane, Vec3, BitMask32
from panda3d.bullet import BulletBoxShape, BulletRigidBodyNode, BulletGhostNode
from direct.gui.OnscreenText import OnscreenText
from lib.lib.p3d.gfx import P3dGfxMgr, set_srgb


class Command:

    def __init__(self, pos, rot):
        self.pos = pos
        self.rot = rot


class Item:

    def __init__(self, world, plane_node, count, cb_inst, curr_bottom, model_path):
        self._world = world
        self._plane_node = plane_node
        self._count = count
        self._cb_inst = cb_inst
        self._paused = False
        self._overlapping = False
        self._first_command = True
        self.repos_done = False
        self._curr_bottom = curr_bottom
        self._model_path = model_path
        self._commands = []
        self._command_idx = -1
        self._set_phys()
        self.node.add_shape(self._shape)
        self._np = render.attach_new_node(self.node)
        world.attach_ghost(self.node)
        self._model = loader.load_model(model_path)
        set_srgb(self._model)
        self._model.flatten_light()
        self._model.reparent_to(self._np)
        self._set_outline_model()
        set_srgb(self._outline_model)
        self._model.hide(BitMask32(0x01))
        self._outline_model.hide(BitMask32(0x01))
        self._start_drag_pos = None
        self._prev_rot_info = None
        self._last_nonoverlapping_pos = None
        self._last_nonoverlapping_rot = None
        self._instantiated = False
        self._box_tsk = taskMgr.add(self.on_frame, 'on_frame')
        self._repos()

    def _set_phys(self):
        self._shape = None
        self.node = BulletGhostNode(self.__class__.__name__)

    def _repos(self):
        p_from, p_to = P3dGfxMgr.world_from_to((-1, 1))
        for hit in self._world.ray_test_all(p_from, p_to).get_hits():
            if hit.get_node() == self._plane_node:
                pos = hit.get_hit_pos()
        corner = P3dGfxMgr.screen_coord(pos)
        bounds = self._np.get_tight_bounds()
        bounds = bounds[0] - self._np.get_pos(), bounds[1] - self._np.get_pos()
        self._np.set_pos(pos)
        plane = Plane(Vec3(0, 1, 0), bounds[0][1])
        pos3d, near_pt, far_pt = Point3(), Point3(), Point3()
        margin, ar = .04, base.get_aspect_ratio()
        margin_x = margin / ar if ar >= 1 else margin
        margin_z = margin * ar if ar < 1 else margin
        top = self._curr_bottom()
        base.camLens.extrude((-1 + margin_x, top - margin_z), near_pt, far_pt)
        plane.intersects_line(
            pos3d, render.get_relative_point(base.camera, near_pt),
            render.get_relative_point(base.camera, far_pt))
        delta = Vec3(bounds[1][0], bounds[1][1], bounds[0][2])
        self._np.set_pos(pos3d + delta)
        if not hasattr(self, '_txt'):
            font = base.loader.load_font('assets/fonts/Hanken-Book.ttf')
            font.clear()
            font.set_pixels_per_unit(60)
            font.set_minfilter(Texture.FTLinearMipmapLinear)
            font.set_outline((0, 0, 0, 1), .8, .2)
            self._txt = OnscreenText(
                str(self._count), font=font, scale=0.06, fg=(.9, .9, .9, 1))
        pos = self._np.get_pos() + (bounds[1][0], bounds[0][1], bounds[0][2])
        p2d = P3dGfxMgr.screen_coord(pos)
        self._txt['pos'] = p2d
        self.repos_done = True

    def get_bottom(self):
        bounds = self._np.get_tight_bounds()
        bounds = bounds[0] - self._np.get_pos(), bounds[1] - self._np.get_pos()
        pos = self._np.get_pos() + (bounds[1][0], bounds[1][1], bounds[0][2])
        p2d = P3dGfxMgr.screen_coord(pos)
        ar = base.get_aspect_ratio()
        return p2d[1] if ar >= 1 else (p2d[1] * ar)

    def get_corner(self):
        bounds = self._np.get_tight_bounds()
        return bounds[1][0], bounds[1][1], bounds[0][2]

    def _set_outline_model(self):
        self._outline_model = loader.load_model(self._model_path)
        clockw = CullFaceAttrib.MCullClockwise
        self._outline_model.set_attrib(CullFaceAttrib.make(clockw))
        self._outline_model.reparent_to(self._np)
        self._outline_model.set_scale(-1.08, -1.08, -1.08)
        self._outline_model.set_light_off()
        self._outline_model.set_color(.4, .4, .4, 1)
        self._outline_model.set_color_scale(.4, .4, .4, 1)
        self._outline_model.hide()

    def on_frame(self, task):
        self._np.set_y(0)
        return task.cont

    def undo(self):
        self._command_idx -= 1
        self._np.set_pos(self._commands[self._command_idx].pos)
        self._np.set_hpr(self._commands[self._command_idx].rot)

    def redo(self):
        self._command_idx += 1
        self._np.set_pos(self._commands[self._command_idx].pos)
        self._np.set_hpr(self._commands[self._command_idx].rot)

    def play(self):
        if not self._instantiated:
            return
        self._world.remove_rigid_body(self.node)
        self.node.set_mass(1)
        self._world.attach_rigid_body(self.node)

    def on_click_l(self, pos):
        if self._paused: return
        self._start_drag_pos = pos, self._np.get_pos()
        loader.load_sfx('assets/audio/sfx/grab.ogg').play()
        if not self._instantiated:
            self._world.remove_ghost(self.node)
            pos = self._np.get_pos()
            self._np.remove_node()
            self.node = BulletRigidBodyNode('box')
            self.node.add_shape(self._shape)
            self._np = render.attach_new_node(self.node)
            self._world.attach_rigid_body(self.node)
            self._model.reparent_to(self._np)
            self._np.set_pos(pos)
            self._set_outline_model()
            self._model.show(BitMask32(0x01))
            self._outline_model.hide(BitMask32(0x01))
            self._instantiated = True
            self._txt.destroy()
            self._count -= 1
            if self._count:
                item = self.__class__(self._world, self._plane_node, self._count, self._cb_inst)  # pylint: disable=no-value-for-parameter
                self._cb_inst(item)

    def on_click_r(self, pos):
        if self._paused: return
        self._prev_rot_info = pos, self._np.get_pos(), self._np.get_r()
        loader.load_sfx('assets/audio/sfx/grab.ogg').play()

    def on_release(self):
        if self._start_drag_pos or self._prev_rot_info:
            loader.load_sfx('assets/audio/sfx/release.ogg').play()
            self._command_idx += 1
            self._commands = self._commands[:self._command_idx]
            self._commands += [Command(self._np.get_pos(), self._np.get_hpr())]
            self._first_command = False
        self._start_drag_pos = self._prev_rot_info = None
        if self._overlapping:
            self._np.set_pos(self._last_nonoverlapping_pos)
            self._np.set_hpr(self._last_nonoverlapping_rot)

    def on_mouse_on(self):
        if not self._paused:
            self._outline_model.show()

    def on_mouse_off(self):
        if self._start_drag_pos or self._prev_rot_info: return
        self._outline_model.hide()

    def on_mouse_move(self, pos):
        if self._start_drag_pos:
            d_pos =  pos - self._start_drag_pos[0]
            self._np.set_pos(self._start_drag_pos[1] + d_pos)
        if self._prev_rot_info:
            start_vec = self._prev_rot_info[0] - self._prev_rot_info[1]
            curr_vec = pos - self._prev_rot_info[1]
            d_angle = curr_vec.signed_angle_deg(start_vec, (0, -1, 0))
            self._np.set_r(self._prev_rot_info[2] + d_angle)
            self._prev_rot_info = pos, self._np.get_pos(), self._np.get_r()
        if self._start_drag_pos or self._prev_rot_info:
            res = self._world.contact_test(self.node)
            nres = res.get_num_contacts()
            if nres <=1:
                self._overlapping = False
                self._outline_model.set_color(.4, .4, .4, 1)
                self._outline_model.set_color_scale(.4, .4, .4, 1)
            if nres > 1 and not self._overlapping:
                actual_nres = 0
                for contact in res.get_contacts():
                    for node in [contact.get_node0(), contact.get_node1()]:
                        if isinstance(node, BulletRigidBodyNode) and \
                                node != self.node:
                            actual_nres += 1
                if actual_nres >= 1:
                    self._overlapping = True
                    loader.load_sfx('assets/audio/sfx/overlap.ogg').play()
                    self._outline_model.set_color(.9, .1, .1, 1)
                    self._outline_model.set_color_scale(.9, .1, .1, 1)
        if not self._overlapping:
            self._last_nonoverlapping_pos = self._np.get_pos()
            self._last_nonoverlapping_rot = self._np.get_hpr()

    def on_aspect_ratio_changed(self):
        if not self._instantiated:
            self._repos()

    def store_state(self):
        self._paused = True
        self._model.set_transparency(True)
        self._model.set_alpha_scale(.3)
        if not self._txt.is_empty():
            self._txt.set_alpha_scale(.3)

    def restore_state(self):
        self._paused = False
        self._model.set_alpha_scale(1)
        if not self._txt.is_empty():
            self._txt.set_alpha_scale(1)

    def destroy(self):
        self._np.remove_node()
        taskMgr.remove(self._box_tsk)
        self._txt.destroy()
        if not self._instantiated:
            self._world.remove_ghost(self.node)
        else:
            self._world.remove_rigid_body(self.node)