summaryrefslogtreecommitdiff
path: root/src/sky.h
blob: a014a920b33a395518914a1786dbd0619a08f09b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/*
Minetest
Copyright (C) 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 <ISceneNode.h>
#include "camera.h"
#include "irrlichttypes_extrabloated.h"

#ifndef SKY_HEADER
#define SKY_HEADER

#define SKY_MATERIAL_COUNT 5
#define SKY_STAR_COUNT 200

class ITextureSource;

// Skybox, rendered with zbuffer turned off, before all other nodes.
class Sky : public scene::ISceneNode
{
public:
	//! constructor
	Sky(scene::ISceneNode *parent, scene::ISceneManager *mgr, s32 id,
			ITextureSource *tsrc);

	virtual void OnRegisterSceneNode();

	//! renders the node.
	virtual void render();

	virtual const aabb3f &getBoundingBox() const { return m_box; }

	// Used by Irrlicht for optimizing rendering
	virtual video::SMaterial &getMaterial(u32 i) { return m_materials[i]; }

	// Used by Irrlicht for optimizing rendering
	virtual u32 getMaterialCount() const { return SKY_MATERIAL_COUNT; }

	void update(float m_time_of_day, float time_brightness, float direct_brightness,
			bool sunlight_seen, CameraMode cam_mode, float yaw, float pitch);

	float getBrightness() { return m_brightness; }

	const video::SColor &getBgColor() const
	{
		return m_visible ? m_bgcolor : m_fallback_bg_color;
	}

	const video::SColor &getSkyColor() const
	{
		return m_visible ? m_skycolor : m_fallback_bg_color;
	}

	bool getCloudsVisible() { return m_clouds_visible && m_clouds_enabled; }
	const video::SColorf &getCloudColor() { return m_cloudcolor_f; }

	void setVisible(bool visible) { m_visible = visible; }
	// Set only from set_sky API
	void setCloudsEnabled(bool clouds_enabled) { m_clouds_enabled = clouds_enabled; }
	void setFallbackBgColor(const video::SColor &fallback_bg_color)
	{
		m_fallback_bg_color = fallback_bg_color;
	}

private:
	aabb3f m_box;
	video::SMaterial m_materials[SKY_MATERIAL_COUNT];

	// How much sun & moon transition should affect horizon color
	float m_horizon_blend()
	{
		if (!m_sunlight_seen)
			return 0;
		float x = m_time_of_day >= 0.5 ? (1 - m_time_of_day) * 2
					       : m_time_of_day * 2;

		if (x <= 0.3)
			return 0;
		if (x <= 0.4) // when the sun and moon are aligned
			return (x - 0.3) * 10;
		if (x <= 0.5)
			return (0.5 - x) * 10;
		return 0;
	}

	// Mix two colors by a given amount
	video::SColor m_mix_scolor(video::SColor col1, video::SColor col2, f32 factor)
	{
		video::SColor result = video::SColor(
				col1.getAlpha() * (1 - factor) + col2.getAlpha() * factor,
				col1.getRed() * (1 - factor) + col2.getRed() * factor,
				col1.getGreen() * (1 - factor) + col2.getGreen() * factor,
				col1.getBlue() * (1 - factor) + col2.getBlue() * factor);
		return result;
	}
	video::SColorf m_mix_scolorf(video::SColorf col1, video::SColorf col2, f32 factor)
	{
		video::SColorf result =
				video::SColorf(col1.r * (1 - factor) + col2.r * factor,
						col1.g * (1 - factor) + col2.g * factor,
						col1.b * (1 - factor) + col2.b * factor,
						col1.a * (1 - factor) + col2.a * factor);
		return result;
	}

	bool m_visible;
	video::SColor m_fallback_bg_color; // Used when m_visible=false
	bool m_first_update;
	float m_time_of_day;
	float m_time_brightness;
	bool m_sunlight_seen;
	float m_brightness;
	float m_cloud_brightness;
	bool m_clouds_visible; // Whether clouds are disabled due to player underground
	bool m_clouds_enabled; // Initialised to true, reset only by set_sky API
	bool m_directional_colored_fog;
	video::SColorf m_bgcolor_bright_f;
	video::SColorf m_skycolor_bright_f;
	video::SColorf m_cloudcolor_bright_f;
	video::SColor m_bgcolor;
	video::SColor m_skycolor;
	video::SColorf m_cloudcolor_f;
	v3f m_stars[SKY_STAR_COUNT];
	video::S3DVertex m_star_vertices[SKY_STAR_COUNT * 4];
	video::ITexture *m_sun_texture;
	video::ITexture *m_moon_texture;
	video::ITexture *m_sun_tonemap;
	video::ITexture *m_moon_tonemap;
};

#endif