client/shaders/3d_interlaced_merge

/*
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.
*/

#pragma once

#include "nodedef.h"
#include <IMeshManipulator.h>

struct MeshMakeData;
struct MeshCollector;

struct LightPair {
	u8 lightDay;
	u8 lightNight;

	LightPair() = default;
	explicit LightPair(u16 value) : lightDay(value & 0xff), lightNight(value >> 8) {}
	LightPair(u8 valueA, u8 valueB) : lightDay(valueA), lightNight(valueB) {}
	LightPair(float valueA, float valueB) :
		lightDay(core::clamp(core::round32(valueA), 0, 255)),
		lightNight(core::clamp(core::round32(valueB), 0, 255)) {}
	operator u16() const { return lightDay | lightNight << 8; }
};

struct LightInfo {
	float light_day;
	float light_night;
	float light_boosted;

	LightPair getPair(float sunlight_boost = 0.0) const
	{
		return LightPair(
			(1 - sunlight_boost) * light_day
			+ sunlight_boost * light_boosted,
			light_night);
	}
};

struct LightFrame {
	f32 lightsDay[8];
	f32 lightsNight[8];
	bool sunlight[8];
};

class MapblockMeshGenerator
{
public:
	MeshMakeData *data;
	MeshCollector *collector;

	const NodeDefManager *nodedef;
	scene::IMeshManipulator *meshmanip;

// options
	bool enable_mesh_cache;

// current node
	v3s16 blockpos_nodes;
	v3s16 p;
	v3f origin;
	MapNode n;
	const ContentFeatures *f;
	LightPair light;
	LightFrame frame;
	video::SColor color;
	TileSpec tile;
	float scale;

// lighting
	void getSmoothLightFrame();
	LightInfo blendLight(const v3f &vertex_pos);
	video::SColor blendLightColor(const v3f &vertex_pos);
	video::SColor blendLightColor(const v3f &vertex_pos, const v3f &vertex_normal);

	void useTile(int index = 0, u8 set_flags = MATERIAL_FLAG_CRACK_OVERLAY,
		u8 reset_flags = 0, bool special = false);
	void getTile(int index, TileSpec *tile);
Mode	Name	Size
-rw-r--r--	opengl_fragment.glsl	502	log plain
-rw-r--r--	opengl_vertex.glsl	116	log plain