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minetest/src/sky.cpp

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#include "sky.h"
#include "IVideoDriver.h"
#include "ISceneManager.h"
#include "ICameraSceneNode.h"
#include "S3DVertex.h"
#include "tile.h" // getTexturePath
#include "noise.h" // easeCurve
#include "main.h" // g_profiler
#include "profiler.h"
#include "util/numeric.h" // MYMIN
//! constructor
Sky::Sky(scene::ISceneNode* parent, scene::ISceneManager* mgr, s32 id):
scene::ISceneNode(parent, mgr, id),
m_first_update(true),
m_brightness(0.5),
m_cloud_brightness(0.5),
m_bgcolor_bright_f(1,1,1,1),
m_skycolor_bright_f(1,1,1,1),
m_cloudcolor_bright_f(1,1,1,1)
{
setAutomaticCulling(scene::EAC_OFF);
Box.MaxEdge.set(0,0,0);
Box.MinEdge.set(0,0,0);
// create material
video::SMaterial mat;
mat.Lighting = false;
mat.ZBuffer = video::ECFN_NEVER;
mat.ZWriteEnable = false;
mat.AntiAliasing=0;
mat.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
mat.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
mat.BackfaceCulling = false;
m_materials[0] = mat;
m_materials[1] = mat;
//m_materials[1].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
m_materials[1].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
m_materials[2] = mat;
m_materials[2].setTexture(0, mgr->getVideoDriver()->getTexture(
getTexturePath("sunrisebg.png").c_str()));
m_materials[2].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
//m_materials[2].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
for(u32 i=0; i<SKY_STAR_COUNT; i++){
m_stars[i] = v3f(
myrand_range(-10000,10000),
myrand_range(-10000,10000),
myrand_range(-10000,10000)
);
m_stars[i].normalize();
}
}
void Sky::OnRegisterSceneNode()
{
if (IsVisible)
SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
scene::ISceneNode::OnRegisterSceneNode();
}
const core::aabbox3d<f32>& Sky::getBoundingBox() const
{
return Box;
}
//! renders the node.
void Sky::render()
{
video::IVideoDriver* driver = SceneManager->getVideoDriver();
scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
if (!camera || !driver)
return;
ScopeProfiler sp(g_profiler, "Sky::render()", SPT_AVG);
// draw perspective skybox
core::matrix4 translate(AbsoluteTransformation);
translate.setTranslation(camera->getAbsolutePosition());
// Draw the sky box between the near and far clip plane
const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
core::matrix4 scale;
scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
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)));
suncolor_f.b = MYMAX(0.0, m_brightness*0.95);
video::SColorf suncolor2_f(1, 1, 1, 1);
suncolor_f.r = 1;
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);
float nightlength = 0.415;
float wn = nightlength / 2;
float wicked_time_of_day = 0;
if(m_time_of_day > wn && m_time_of_day < 1.0 - wn)
wicked_time_of_day = (m_time_of_day - wn)/(1.0-wn*2)*0.5 + 0.25;
else if(m_time_of_day < 0.5)
wicked_time_of_day = m_time_of_day / wn * 0.25;
else
wicked_time_of_day = 1.0 - ((1.0-m_time_of_day) / wn * 0.25);
/*std::cerr<<"time_of_day="<<m_time_of_day<<" -> "
<<"wicked_time_of_day="<<wicked_time_of_day<<std::endl;*/
video::SColor suncolor = suncolor_f.toSColor();
video::SColor suncolor2 = suncolor2_f.toSColor();
video::SColor mooncolor = mooncolor_f.toSColor();
video::SColor mooncolor2 = mooncolor2_f.toSColor();
const f32 t = 1.0f;
const f32 o = 0.0f;
static const u16 indices[4] = {0,1,2,3};
video::S3DVertex vertices[4];
driver->setMaterial(m_materials[1]);
//video::SColor cloudyfogcolor(255,255,255,255);
video::SColor cloudyfogcolor = m_bgcolor;
//video::SColor cloudyfogcolor = m_bgcolor.getInterpolated(m_skycolor, 0.5);
// Draw far cloudy fog thing
for(u32 j=0; j<4; j++)
{
video::SColor c = cloudyfogcolor.getInterpolated(m_skycolor, 0.45);
vertices[0] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( 1, 0.12,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-1, 0.12,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
if(j==0)
// Don't switch
{}
else if(j==1)
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
else if(j==2)
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
else
// Switch from -Z (south) to -Z (north)
vertices[i].Pos.rotateXZBy(-180);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
for(u32 j=0; j<4; j++)
{
video::SColor c = cloudyfogcolor;
vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
if(j==0)
// Don't switch
{}
else if(j==1)
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
else if(j==2)
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
else
// Switch from -Z (south) to -Z (north)
vertices[i].Pos.rotateXZBy(-180);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
driver->setMaterial(m_materials[2]);
{
float mid1 = 0.25;
float mid = (wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1));
float a_ = 1.0 - fabs(wicked_time_of_day - mid) * 35.0;
float a = easeCurve(MYMAX(0, MYMIN(1, a_)));
//std::cerr<<"a_="<<a_<<" a="<<a<<std::endl;
video::SColor c(255,255,255,255);
float y = -(1.0 - a) * 0.2;
vertices[0] = video::S3DVertex(-1,-0.05+y,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( 1,-0.05+y,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( 1, 0.2+y,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-1, 0.2+y,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
if(wicked_time_of_day < 0.5)
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
else
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
driver->setMaterial(m_materials[1]);
// Draw sun
if(wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85)
{
float d = sunsize * 1.7;
video::SColor c = suncolor;
c.setAlpha(0.05*255);
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
d = sunsize * 1.2;
c = suncolor;
c.setAlpha(0.15*255);
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
d = sunsize;
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor, t, t);
vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor, o, t);
vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor, o, o);
vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
d = sunsize * 0.7;
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor2, t, t);
vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor2, o, t);
vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor2, o, o);
vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor2, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
// Draw moon
if(wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7)
{
float d = moonsize * 1.9;
video::SColor c = mooncolor;
c.setAlpha(0.05*255);
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
d = moonsize * 1.3;
c = mooncolor;
c.setAlpha(0.15*255);
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
d = moonsize;
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor, t, t);
vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, mooncolor, o, t);
vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, mooncolor, o, o);
vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, mooncolor, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
float d2 = moonsize * 0.6;
vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor2, t, t);
vertices[1] = video::S3DVertex( d2,-d,-1, 0,0,1, mooncolor2, o, t);
vertices[2] = video::S3DVertex( d2, d2,-1, 0,0,1, mooncolor2, o, o);
vertices[3] = video::S3DVertex(-d, d2,-1, 0,0,1, mooncolor2, t, o);
for(u32 i=0; i<4; i++){
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
// Stars
do{
float starbrightness = MYMAX(0, MYMIN(1,
(0.285 - fabs(wicked_time_of_day < 0.5 ?
wicked_time_of_day : (1.0 - wicked_time_of_day))) * 10));
float f = starbrightness;
float d = 0.007;
video::SColor starcolor(255, f*90,f*90,f*90);
if(starcolor.getBlue() < m_skycolor.getBlue())
break;
u16 indices[SKY_STAR_COUNT*4];
video::S3DVertex vertices[SKY_STAR_COUNT*4];
for(u32 i=0; i<SKY_STAR_COUNT; i++){
indices[i*4+0] = i*4+0;
indices[i*4+1] = i*4+1;
indices[i*4+2] = i*4+2;
indices[i*4+3] = i*4+3;
v3f p = m_stars[i];
core::CMatrix4<f32> a;
a.buildRotateFromTo(v3f(0,1,0), v3f(d,1+d/2,0));
v3f p1 = p;
a.rotateVect(p1);
a.buildRotateFromTo(v3f(0,1,0), v3f(d,1,d));
v3f p2 = p;
a.rotateVect(p2);
a.buildRotateFromTo(v3f(0,1,0), v3f(0,1-d/2,d));
v3f p3 = p;
a.rotateVect(p3);
p.rotateXYBy(wicked_time_of_day * 360 - 90);
p1.rotateXYBy(wicked_time_of_day * 360 - 90);
p2.rotateXYBy(wicked_time_of_day * 360 - 90);
p3.rotateXYBy(wicked_time_of_day * 360 - 90);
vertices[i*4+0].Pos = p;
vertices[i*4+0].Color = starcolor;
vertices[i*4+1].Pos = p1;
vertices[i*4+1].Color = starcolor;
vertices[i*4+2].Pos = p2;
vertices[i*4+2].Color = starcolor;
vertices[i*4+3].Pos = p3;
vertices[i*4+3].Color = starcolor;
}
driver->drawVertexPrimitiveList(vertices, SKY_STAR_COUNT*4,
indices, SKY_STAR_COUNT, video::EVT_STANDARD,
scene::EPT_QUADS, video::EIT_16BIT);
}while(0);
for(u32 j=0; j<2; j++)
{
//video::SColor c = m_skycolor;
video::SColor c = cloudyfogcolor;
vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
vertices[2] = video::S3DVertex( 1,-0.02,-1, 0,0,1, c, o, o);
vertices[3] = video::S3DVertex(-1,-0.02,-1, 0,0,1, c, t, o);
for(u32 i=0; i<4; i++){
//if(wicked_time_of_day < 0.5)
if(j==0)
// Switch from -Z (south) to +X (east)
vertices[i].Pos.rotateXZBy(90);
else
// Switch from -Z (south) to -X (west)
vertices[i].Pos.rotateXZBy(-90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
}
}
void Sky::update(float time_of_day, float time_brightness,
float direct_brightness, bool sunlight_seen)
{
// Stabilize initial brightness and color values by flooding updates
if(m_first_update){
/*dstream<<"First update with time_of_day="<<time_of_day
<<" time_brightness="<<time_brightness
<<" direct_brightness="<<direct_brightness
<<" sunlight_seen="<<sunlight_seen<<std::endl;*/
m_first_update = false;
for(u32 i=0; i<100; i++){
update(time_of_day, time_brightness, direct_brightness,
sunlight_seen);
}
return;
}
m_time_of_day = time_of_day;
m_time_brightness = time_brightness;
m_sunlight_seen = sunlight_seen;
bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
//video::SColorf bgcolor_bright_normal_f(170./255,200./255,230./255, 1.0);
video::SColorf bgcolor_bright_normal_f(155./255,193./255,240./255, 1.0);
video::SColorf bgcolor_bright_indoor_f(100./255,100./255,100./255, 1.0);
//video::SColorf bgcolor_bright_dawn_f(0.666,200./255*0.7,230./255*0.5,1.0);
//video::SColorf bgcolor_bright_dawn_f(0.666,0.549,0.220,1.0);
//video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.0, 1.0);
//video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.2,1.0);
video::SColorf bgcolor_bright_dawn_f
(155./255*1.2,193./255,240./255, 1.0);
video::SColorf skycolor_bright_normal_f =
video::SColor(255, 140, 186, 250);
video::SColorf skycolor_bright_dawn_f =
video::SColor(255, 180, 186, 250);
video::SColorf cloudcolor_bright_normal_f =
video::SColor(255, 240,240,255);
//video::SColorf cloudcolor_bright_dawn_f(1.0, 0.591, 0.4);
//video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
if(sunlight_seen){
//m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
}
else{
if(direct_brightness < m_brightness)
m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
else
m_brightness = m_brightness * 0.98 + direct_brightness * 0.02;
}
m_clouds_visible = true;
float color_change_fraction = 0.98;
if(sunlight_seen){
if(is_dawn){
m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
bgcolor_bright_dawn_f, color_change_fraction);
m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
skycolor_bright_dawn_f, color_change_fraction);
m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
cloudcolor_bright_dawn_f, color_change_fraction);
} else {
m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
bgcolor_bright_normal_f, color_change_fraction);
m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
skycolor_bright_normal_f, color_change_fraction);
m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
cloudcolor_bright_normal_f, color_change_fraction);
}
} else {
m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
bgcolor_bright_indoor_f, color_change_fraction);
m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
cloudcolor_bright_normal_f, color_change_fraction);
m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
bgcolor_bright_indoor_f, color_change_fraction);
m_clouds_visible = false;
}
video::SColor bgcolor_bright = m_bgcolor_bright_f.toSColor();
m_bgcolor = video::SColor(
255,
bgcolor_bright.getRed() * m_brightness,
bgcolor_bright.getGreen() * m_brightness,
bgcolor_bright.getBlue() * m_brightness);
video::SColor skycolor_bright = m_skycolor_bright_f.toSColor();
m_skycolor = video::SColor(
255,
skycolor_bright.getRed() * m_brightness,
skycolor_bright.getGreen() * m_brightness,
skycolor_bright.getBlue() * m_brightness);
float cloud_direct_brightness = 0;
if(sunlight_seen){
cloud_direct_brightness = time_brightness;
if(time_brightness >= 0.2 && time_brightness < 0.7)
cloud_direct_brightness *= 1.3;
} else {
cloud_direct_brightness = direct_brightness;
}
m_cloud_brightness = m_cloud_brightness * 0.95 +
cloud_direct_brightness * (1.0 - 0.95);
m_cloudcolor_f = video::SColorf(
m_cloudcolor_bright_f.getRed() * m_cloud_brightness,
m_cloudcolor_bright_f.getGreen() * m_cloud_brightness,
m_cloudcolor_bright_f.getBlue() * m_cloud_brightness,
1.0);
}
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