games/devtest/mods/unittests/textures/default_dirt.png

/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "clientmap.h"
#include "client.h"
#include "mapblock_mesh.h"
#include <IMaterialRenderer.h>
#include <matrix4.h>
#include "mapsector.h"
#include "mapblock.h"
#include "profiler.h"
#include "settings.h"
#include "camera.h"               // CameraModes
#include "util/basic_macros.h"
#include <algorithm>
#include "client/renderingengine.h"

ClientMap::ClientMap(
		Client *client,
		MapDrawControl &control,
		s32 id
):
	Map(dout_client, client),
	scene::ISceneNode(RenderingEngine::get_scene_manager()->getRootSceneNode(),
		RenderingEngine::get_scene_manager(), id),
	m_client(client),
	m_control(control)
{
	m_box = aabb3f(-BS*1000000,-BS*1000000,-BS*1000000,
			BS*1000000,BS*1000000,BS*1000000);

	/* TODO: Add a callback function so these can be updated when a setting
	 *       changes.  At this point in time it doesn't matter (e.g. /set
	 *       is documented to change server settings only)
	 *
	 * TODO: Local caching of settings is not optimal and should at some stage
	 *       be updated to use a global settings object for getting thse values
	 *       (as opposed to the this local caching). This can be addressed in
	 *       a later release.
	 */
	m_cache_trilinear_filter  = g_settings->getBool("trilinear_filter");
	m_cache_bilinear_filter   = g_settings->getBool("bilinear_filter");
	m_cache_anistropic_filter = g_settings->getBool("anisotropic_filter");

}

MapSector * ClientMap::emergeSector(v2s16 p2d)
{
	// Check that it doesn't exist already
	MapSector *sector = getSectorNoGenerate(p2d);

	// Create it if it does not exist yet
	if (!sector) {
		sector = new MapSector(this, p2d, m_gamedef);
		m_sectors[p2d] = sector;
	}

	return sector;
}

void ClientMap::OnRegisterSceneNode()
{
	if(IsVisible)
	{
		SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
		SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
	}

	ISceneNode::OnRegisterSceneNode();
}

void ClientMap::getBlocksInViewRange(v3s16 cam_pos_nodes,
		v3s16 *p_blocks_min, v3s16 *p_blocks_max)
{
	v3s16 box_nodes_d = m_control.wanted_range * v3s16(1, 1, 1);
	// Define p_nodes_min/max as v3s32 because 'cam_pos_nodes -/+ box_nodes_d'
	// can exceed the range of v3s16 when a large view range is used near the
	// world edges.
	v3s32 p_nodes_min(
		cam_pos_nodes.X - box_nodes_d.X,
		cam_pos_nodes.Y - box_nodes_d.Y,
		cam_pos_nodes.Z - box_nodes_d.Z);
	v3s32 p_nodes_max(
		cam_pos_nodes.X + box_nodes_d.X,
		cam_pos_nodes.Y + box_nodes_d.Y,
		cam_pos_nodes.Z + box_nodes_d.Z);
	// Take a fair amount as we will be dropping more out later
	// Umm... these additions are a bit strange but they are needed.
	*p_blocks_min = v3s16(
			p_nodes_min.X / MAP_BLOCKSIZE - 3,
			p_nodes_min.Y / MAP_BLOCKSIZE - 3,
			p_nodes_min.Z / MAP_BLOCKSIZE - 3);
	*p_blocks_max = v3s16(
			p_nodes_max.X / MAP_BLOCKSIZE + 1,
			p_nodes_max.Y / MAP_BLOCKSIZE + 1,
			p_nodes_max.Z / MAP_BLOCKSIZE + 1);
}

void ClientMap::updateDrawList()
{
	ScopeProfiler sp(g_profiler, "CM::updateDrawList()", SPT_AVG);

	for (auto &i : m_drawlist) {
		MapBlock *block = i.second;
		block->refDrop();
	}
	m_drawlist.clear();

	v3f camera_position = m_camera_position;
	v3f camera_direction = m_camera_direction;
	f32 camera_fov = m_camera_fov;

	// Use a higher fov to accomodate faster camera movements.
	// Blocks are cropped better when they are drawn.
	// Or maybe they aren't? Well whatever.
	camera_fov *= 1.2;

	v3s16 cam_pos_nodes = floatToInt(camera_position, BS);
	v3s16 p_blocks_min;
	v3s16 p_blocks_max;
	getBlocksInViewRange(cam_pos_nodes, &p_blocks_min, &p_blocks_max);

	// Number of blocks with mesh in rendering range
	u32 blocks_in_range_with_mesh = 0;
	// Number of blocks occlusion culled
	u32 blocks_occlusion_culled = 0;

	// No occlusion culling when free_move is on and camera is
	// inside ground
	bool occlusion_culling_enabled = true;
	if (g_settings->getBool("free_move") && g_settings->getBool("noclip")) {
		MapNode n = getNode(cam_pos_nodes);
		if (n.getContent() == CONTENT_IGNORE ||
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