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Add documentation of sun/moon orientation/scale differences (#12145)

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DS 2022-09-06 12:21:55 +02:00 committed by GitHub
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3 changed files with 29 additions and 15 deletions
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10
doc/lua_api.txt
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@ -7208,6 +7208,8 @@ child will follow movement and rotation of that bone.
(default: `true`)
* `texture`: A regular texture for the sun. Setting to `""`
will re-enable the mesh sun. (default: "sun.png", if it exists)
The texture appears non-rotated at sunrise and rotated 180 degrees
(upside down) at sunset.
* `tonemap`: A 512x1 texture containing the tonemap for the sun
(default: `"sun_tonemap.png"`)
* `sunrise`: A regular texture for the sunrise texture.
@ -7215,6 +7217,8 @@ child will follow movement and rotation of that bone.
* `sunrise_visible`: Boolean for whether the sunrise texture is visible.
(default: `true`)
* `scale`: Float controlling the overall size of the sun. (default: `1`)
Note: For legacy reasons, the sun is bigger than the moon by a factor
of about `1.57` for equal `scale` values.
* `get_sun()`: returns a table with the current sun parameters as in
`set_sun`.
* `set_moon(moon_parameters)`:
@ -7224,11 +7228,15 @@ child will follow movement and rotation of that bone.
(default: `true`)
* `texture`: A regular texture for the moon. Setting to `""`
will re-enable the mesh moon. (default: `"moon.png"`, if it exists)
Note: Relative to the sun, the moon texture is rotated by 180°.
The texture appears non-rotated at sunrise / moonset and rotated 180
degrees (upside down) at sunset / moonrise.
Note: Relative to the sun, the moon texture is hence rotated by 180°.
You can use the `^[transformR180` texture modifier to achieve the same orientation.
* `tonemap`: A 512x1 texture containing the tonemap for the moon
(default: `"moon_tonemap.png"`)
* `scale`: Float controlling the overall size of the moon (default: `1`)
Note: For legacy reasons, the sun is bigger than the moon by a factor
of about `1.57` for equal `scale` values.
* `get_moon()`: returns a table with the current moon parameters as in
`set_moon`.
* `set_stars(star_parameters)`:

22
src/client/sky.cpp
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@ -142,7 +142,6 @@ void Sky::render()
driver->setTransform(video::ETS_WORLD, translate * scale);
if (m_sunlight_seen) {
float sunsize = 0.07;
video::SColorf suncolor_f(1, 1, 0, 1);
//suncolor_f.r = 1;
//suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.7 + m_time_brightness * 0.5));
@ -156,7 +155,6 @@ void Sky::render()
suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.85 + m_time_brightness * 0.5));
suncolor_f.b = MYMAX(0.0, m_brightness);
float moonsize = 0.04;
video::SColorf mooncolor_f(0.50, 0.57, 0.65, 1);
video::SColorf mooncolor2_f(0.85, 0.875, 0.9, 1);
@ -294,11 +292,11 @@ void Sky::render()
// Draw sun
if (m_sun_params.visible)
draw_sun(driver, sunsize, suncolor, suncolor2, wicked_time_of_day);
draw_sun(driver, suncolor, suncolor2, wicked_time_of_day);
// Draw moon
if (m_moon_params.visible)
draw_moon(driver, moonsize, mooncolor, mooncolor2, wicked_time_of_day);
draw_moon(driver, mooncolor, mooncolor2, wicked_time_of_day);
// Draw far cloudy fog thing below all horizons in front of sun, moon
// and stars.
@ -573,16 +571,18 @@ v3f Sky::getMoonDirection()
return getSkyBodyPosition(270, getWickedTimeOfDay(m_time_of_day) * 360 - 90, m_sky_body_orbit_tilt);
}
void Sky::draw_sun(video::IVideoDriver *driver, float sunsize, const video::SColor &suncolor,
void Sky::draw_sun(video::IVideoDriver *driver, const video::SColor &suncolor,
const video::SColor &suncolor2, float wicked_time_of_day)
/* Draw sun in the sky.
* driver: Video driver object used to draw
* sunsize: the default size of the sun
* suncolor: main sun color
* suncolor2: second sun color
* wicked_time_of_day: current time of day, to know where should be the sun in the sky
*/
{
// A magic number that contributes to the ratio 1.57 sun/moon size difference.
constexpr float sunsize = 0.07;
static const u16 indices[] = {0, 1, 2, 0, 2, 3};
std::array<video::S3DVertex, 4> vertices;
if (!m_sun_texture) {
@ -605,6 +605,8 @@ void Sky::draw_sun(video::IVideoDriver *driver, float sunsize, const video::SCol
}
} else {
driver->setMaterial(m_materials[3]);
// Another magic number that contributes to the ratio 1.57 sun/moon size
// difference.
float d = (sunsize * 1.7) * m_sun_params.scale;
video::SColor c;
if (m_sun_tonemap)
@ -618,18 +620,20 @@ void Sky::draw_sun(video::IVideoDriver *driver, float sunsize, const video::SCol
}
void Sky::draw_moon(video::IVideoDriver *driver, float moonsize, const video::SColor &mooncolor,
void Sky::draw_moon(video::IVideoDriver *driver, const video::SColor &mooncolor,
const video::SColor &mooncolor2, float wicked_time_of_day)
/*
* Draw moon in the sky.
* driver: Video driver object used to draw
* moonsize: the default size of the moon
* mooncolor: main moon color
* mooncolor2: second moon color
* wicked_time_of_day: current time of day, to know where should be the moon in
* the sky
*/
{
// A magic number that contributes to the ratio 1.57 sun/moon size difference.
constexpr float moonsize = 0.04;
static const u16 indices[] = {0, 1, 2, 0, 2, 3};
std::array<video::S3DVertex, 4> vertices;
if (!m_moon_texture) {
@ -658,6 +662,8 @@ void Sky::draw_moon(video::IVideoDriver *driver, float moonsize, const video::SC
}
} else {
driver->setMaterial(m_materials[4]);
// Another magic number that contributes to the ratio 1.57 sun/moon size
// difference.
float d = (moonsize * 1.9) * m_moon_params.scale;
video::SColor c;
if (m_moon_tonemap)

4
src/client/sky.h
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@ -200,9 +200,9 @@ private:
void updateStars();
void draw_sun(video::IVideoDriver *driver, float sunsize, const video::SColor &suncolor,
void draw_sun(video::IVideoDriver *driver, const video::SColor &suncolor,
const video::SColor &suncolor2, float wicked_time_of_day);
void draw_moon(video::IVideoDriver *driver, float moonsize, const video::SColor &mooncolor,
void draw_moon(video::IVideoDriver *driver, const video::SColor &mooncolor,
const video::SColor &mooncolor2, float wicked_time_of_day);
void draw_sky_body(std::array<video::S3DVertex, 4> &vertices,
float pos_1, float pos_2, const video::SColor &c);