src/client/content_cao.cpp


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/*
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 "content_cao.h"
#include <IBillboardSceneNode.h>
#include <ICameraSceneNode.h>
#include <ITextSceneNode.h>
#include <IMeshManipulator.h>
#include <IAnimatedMeshSceneNode.h>
#include "client/client.h"
#include "client/renderingengine.h"
#include "client/sound.h"
#include "client/tile.h"
#include "util/basic_macros.h"
#include "util/numeric.h" // For IntervalLimiter & setPitchYawRoll
#include "util/serialize.h"
#include "camera.h" // CameraModes
#include "collision.h"
#include "content_cso.h"
#include "environment.h"
#include "itemdef.h"
#include "localplayer.h"
#include "map.h"
#include "mesh.h"
#include "nodedef.h"
#include "serialization.h" // For decompressZlib
#include "settings.h"
#include "sound.h"
#include "tool.h"
#include "wieldmesh.h"
#include <algorithm>
#include <cmath>
#include "client/shader.h"
#include "client/minimap.h"

class Settings;
struct ToolCapabilities;

std::unordered_map<u16, ClientActiveObject::Factory> ClientActiveObject::m_types;

template<typename T>
void SmoothTranslator<T>::init(T current)
{
	val_old = current;
	val_current = current;
	val_target = current;
	anim_time = 0;
	anim_time_counter = 0;
	aim_is_end = true;
}

template<typename T>
void SmoothTranslator<T>::update(T new_target, bool is_end_position, float update_interval)
{
	aim_is_end = is_end_position;
	val_old = val_current;
	val_target = new_target;
	if (update_interval > 0) {
		anim_time = update_interval;
	} else {
		if (anim_time < 0.001 || anim_time > 1.0)
			anim_time = anim_time_counter;
		else
			anim_time = anim_time * 0.9 + anim_time_counter * 0.1;
	}
	anim_time_counter = 0;
}

template<typename T>
void SmoothTranslator<T>::translate(f32 dtime)
{
	anim_time_counter = anim_time_counter + dtime;
	T val_diff = val_target - val_old;
	f32 moveratio = 1.0;
	if (anim_time > 0.001)
		moveratio = anim_time_counter / anim_time;
	f32 move_end = aim_is_end ? 1.0 : 1.5;

	// Move a bit less than should, to avoid oscillation
	moveratio = std::min(moveratio * 0.8f, move_end);
	val_current = val_old + val_diff * moveratio;
}

void SmoothTranslatorWrapped::translate(f32 dtime)
{
	anim_time_counter = anim_time_counter + dtime;
	f32 val_diff = std::abs(val_target - val_old);
	if (val_diff > 180.f)
		val_diff = 360.f - val_diff;

	f32 moveratio = 1.0;
	if (anim_time > 0.001)
		moveratio = anim_time_counter / anim_time;
	f32 move_end = aim_is_end ? 1.0 : 1.5;

	// Move a bit less than should, to avoid oscillation
	moveratio = std::min(moveratio * 0.8f, move_end);
	wrappedApproachShortest(val_current, val_target,
		val_diff * moveratio, 360.f);
}

void SmoothTranslatorWrappedv3f::translate(f32 dtime)
{
	anim_time_counter = anim_time_counter + dtime;

	v3f val_diff_v3f;
	val_diff_v3f.X = std::abs(val_target.X - val_old.X);
	val_diff_v3f.Y = std::abs(val_target.Y - val_old.Y);
	val_diff_v3f.Z = std::abs(val_target.Z - val_old.Z);

	if (val_diff_v3f.X > 180.f)
		val_diff_v3f.X = 360.f - val_diff_v3f.X;

	if (val_diff_v3f.Y > 180.f)
		val_diff_v3f.Y = 360.f - val_diff_v3f.Y;

	if (val_diff_v3f.Z > 180.f)
		val_diff_v3f.Z = 360.f - val_diff_v3f.Z;

	f32 moveratio = 1.0;
	if (anim_time > 0.001)
		moveratio = anim_time_counter / anim_time;
	f32 move_end = aim_is_end ? 1.0 : 1.5;

	// Move a bit less than should, to avoid oscillation
	moveratio = std::min(moveratio * 0.8f, move_end);
	wrappedApproachShortest(val_current.X, val_target.X,
		val_diff_v3f.X * moveratio, 360.f);

	wrappedApproachShortest(val_current.Y, val_target.Y,
		val_diff_v3f.Y * moveratio, 360.f);

	wrappedApproachShortest(val_current.Z, val_target.Z,
		val_diff_v3f.Z * moveratio, 360.f);
}

/*
	Other stuff
*/

static void setBillboardTextureMatrix(scene::IBillboardSceneNode *bill,
		float txs, float tys, int col, int row)
{
	video::SMaterial& material = bill->getMaterial(0);
	core::matrix4& matrix = material.getTextureMatrix(0);
	matrix.setTextureTranslate(txs*col, tys*row);
	matrix.setTextureScale(txs, tys);
}

// Evaluate transform chain recursively; irrlicht does not do this for us
static void updatePositionRecursive(scene::ISceneNode *node)
{
	scene::ISceneNode *parent = node->getParent();
	if (parent)
		updatePositionRecursive(parent);
	node->updateAbsolutePosition();
}

/*
	TestCAO
*/

class TestCAO : public ClientActiveObject
{
public:
	TestCAO(Client *client, ClientEnvironment *env);
	virtual ~TestCAO() = default;

	ActiveObjectType getType() const
	{
		return ACTIVEOBJECT_TYPE_TEST;
	}

	static ClientActiveObject* create(Client *client, ClientEnvironment *env);

	void addToScene(ITextureSource *tsrc);
	void removeFromScene(bool permanent);
	void updateLight(u32 day_night_ratio);
	void updateNodePos();

	void step(float dtime, ClientEnvironment *env);

	void processMessage(const std::string &data);

	bool getCollisionBox(aabb3f *toset) const { return false; }
private:
	scene::IMeshSceneNode *m_node;
	v3f m_position;
};

// Prototype
TestCAO proto_TestCAO(NULL, NULL);

TestCAO::TestCAO(Client *client, ClientEnvironment *env):
	ClientActiveObject(0, client, env),
	m_node(NULL),
	m_position(v3f(0,10*BS,0))
{
	ClientActiveObject::registerType(getType(), create);
}

ClientActiveObject* TestCAO::create(Client *client, ClientEnvironment *env)
{
	return new TestCAO(client, env);
}

void TestCAO::addToScene(ITextureSource *tsrc)
{
	if(m_node != NULL)
		return;

	//video::IVideoDriver* driver = smgr->getVideoDriver();

	scene::SMesh *mesh = new scene::SMesh();
	scene::IMeshBuffer *buf = new scene::SMeshBuffer();
	video::SColor c(255,255,255,255);
	video::S3DVertex vertices[4] =
	{
		video::S3DVertex(-BS/2,-BS/4,0, 0,0,0, c, 0,1),
		video::S3DVertex(BS/2,-BS/4,0, 0,0,0, c, 1,1),
		video::S3DVertex(BS/2,BS/4,0, 0,0,0, c, 1,0),