minetest/src/client/sky.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 "sky.h"
#include "IVideoDriver.h"
#include "ISceneManager.h"
#include "ICameraSceneNode.h"
#include "S3DVertex.h"
#include "client/tile.h"
#include "noise.h" // easeCurve
#include "profiler.h"
#include "util/numeric.h"
#include <cmath>
#include "client/renderingengine.h"
#include "settings.h"
#include "camera.h" // CameraModes
Sky::Sky(s32 id, ITextureSource *tsrc):
scene::ISceneNode(RenderingEngine::get_scene_manager()->getRootSceneNode(),
RenderingEngine::get_scene_manager(), id)
{
setAutomaticCulling(scene::EAC_OFF);
m_box.MaxEdge.set(0, 0, 0);
m_box.MinEdge.set(0, 0, 0);
// Create material
video::SMaterial mat;
mat.Lighting = false;
#ifdef __ANDROID__
mat.ZBuffer = video::ECFN_DISABLED;
#else
mat.ZBuffer = video::ECFN_NEVER;
#endif
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, tsrc->getTextureForMesh("sunrisebg.png"));
m_materials[2].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
//m_materials[2].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
m_sun_texture = tsrc->isKnownSourceImage("sun.png") ?
tsrc->getTextureForMesh("sun.png") : NULL;
m_moon_texture = tsrc->isKnownSourceImage("moon.png") ?
tsrc->getTextureForMesh("moon.png") : NULL;
m_sun_tonemap = tsrc->isKnownSourceImage("sun_tonemap.png") ?
tsrc->getTexture("sun_tonemap.png") : NULL;
m_moon_tonemap = tsrc->isKnownSourceImage("moon_tonemap.png") ?
tsrc->getTexture("moon_tonemap.png") : NULL;
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if (m_sun_texture) {
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m_materials[3] = mat;
m_materials[3].setTexture(0, m_sun_texture);
m_materials[3].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
if (m_sun_tonemap)
m_materials[3].Lighting = true;
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}
if (m_moon_texture) {
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m_materials[4] = mat;
m_materials[4].setTexture(0, m_moon_texture);
m_materials[4].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
if (m_moon_tonemap)
m_materials[4].Lighting = true;
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}
for (v3f &star : m_stars) {
star = v3f(
myrand_range(-10000, 10000),
myrand_range(-10000, 10000),
myrand_range(-10000, 10000)
);
star.normalize();
}
m_directional_colored_fog = g_settings->getBool("directional_colored_fog");
}
void Sky::OnRegisterSceneNode()
{
if (IsVisible)
SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
scene::ISceneNode::OnRegisterSceneNode();
}
void Sky::render()
{
if (!m_visible)
return;
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);
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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);
// The values below were probably meant to be suncolor2_f instead of a
// reassignment of suncolor_f. However, the resulting colour was chosen
// and is our long-running classic colour. So preserve, but comment-out
// the unnecessary first assignments above.
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);
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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();
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// Calculate offset normalized to the X dimension of a 512x1 px tonemap
float offset = (1.0 - fabs(sin((m_time_of_day - 0.5) * irr::core::PI))) * 511;
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if (m_sun_tonemap) {
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u8 * texels = (u8 *)m_sun_tonemap->lock();
video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
video::SColor texel_color (255, texel->getRed(),
texel->getGreen(), texel->getBlue());
m_sun_tonemap->unlock();
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m_materials[3].EmissiveColor = texel_color;
}
if (m_moon_tonemap) {
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u8 * texels = (u8 *)m_moon_tonemap->lock();
video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
video::SColor texel_color (255, texel->getRed(),
texel->getGreen(), texel->getBlue());
m_moon_tonemap->unlock();
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m_materials[4].EmissiveColor = texel_color;
}
const f32 t = 1.0f;
const f32 o = 0.0f;
static const u16 indices[4] = {0, 1, 2, 3};
video::S3DVertex vertices[4];
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driver->setMaterial(m_materials[1]);
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video::SColor cloudyfogcolor = m_bgcolor;
// Draw far cloudy fog thing blended with skycolor
for (u32 j = 0; j < 4; j++) {
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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 (video::S3DVertex &vertex : vertices) {
if (j == 0)
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// Don't switch
{}
else if (j == 1)
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// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
else if (j == 2)
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// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
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else
// Switch from -Z (south) to +Z (north)
vertex.Pos.rotateXZBy(-180);
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}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
// Draw far cloudy fog thing at and below all horizons
for (u32 j = 0; j < 4; j++) {
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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 (video::S3DVertex &vertex : vertices) {
if (j == 0)
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// Don't switch
{}
else if (j == 1)
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// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
else if (j == 2)
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// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
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else
// Switch from -Z (south) to +Z (north)
vertex.Pos.rotateXZBy(-180);
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}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
// If sun, moon and stars are (temporarily) disabled, abort here
if (!m_bodies_visible)
return;
// Draw stars before sun and moon to be behind them
do {
driver->setMaterial(m_materials[1]);
// Tune values so that stars first appear just after the sun
// disappears over the horizon, and disappear just before the sun
// appears over the horizon.
// Also tune so that stars are at full brightness from time 20000 to
// time 4000.
float starbrightness = MYMAX(0, MYMIN(1,
(0.25 - fabs(wicked_time_of_day < 0.5 ?
wicked_time_of_day : (1.0 - wicked_time_of_day))) * 20));
float f = starbrightness;
float d = 0.007 / 2;
video::SColor starcolor(255, f * 90, f * 90, f * 90);
// Stars are only drawn when brighter than skycolor
if (starcolor.getBlue() < m_skycolor.getBlue())
break;
#ifdef __ANDROID__
u16 indices[SKY_STAR_COUNT * 3];
video::S3DVertex vertices[SKY_STAR_COUNT * 3];
for (u32 i = 0; i < SKY_STAR_COUNT; i++) {
indices[i * 3 + 0] = i * 3 + 0;
indices[i * 3 + 1] = i * 3 + 1;
indices[i * 3 + 2] = i * 3 + 2;
v3f r = m_stars[i];
core::CMatrix4<f32> a;
a.buildRotateFromTo(v3f(0, 1, 0), r);
v3f p = v3f(-d, 1, -d);
v3f p1 = v3f(d, 1, 0);
v3f p2 = v3f(-d, 1, d);
a.rotateVect(p);
a.rotateVect(p1);
a.rotateVect(p2);
p.rotateXYBy(wicked_time_of_day * 360 - 90);
p1.rotateXYBy(wicked_time_of_day * 360 - 90);
p2.rotateXYBy(wicked_time_of_day * 360 - 90);
vertices[i * 3 + 0].Pos = p;
vertices[i * 3 + 0].Color = starcolor;
vertices[i * 3 + 1].Pos = p1;
vertices[i * 3 + 1].Color = starcolor;
vertices[i * 3 + 2].Pos = p2;
vertices[i * 3 + 2].Color = starcolor;
}
driver->drawIndexedTriangleList(vertices, SKY_STAR_COUNT * 3,
indices, SKY_STAR_COUNT);
#else
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 r = m_stars[i];
core::CMatrix4<f32> a;
a.buildRotateFromTo(v3f(0, 1, 0), r);
v3f p = v3f(-d, 1, -d);
v3f p1 = v3f( d, 1, -d);
v3f p2 = v3f( d, 1, d);
v3f p3 = v3f(-d, 1, d);
a.rotateVect(p);
a.rotateVect(p1);
a.rotateVect(p2);
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);
#endif
} while(false);
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// Draw sunrise/sunset horizon glow texture (textures/base/pack/sunrisebg.png)
{
driver->setMaterial(m_materials[2]);
float mid1 = 0.25;
float mid = wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1);
float a_ = 1.0f - std::fabs(wicked_time_of_day - mid) * 35.0f;
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) * 0.22;
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 (video::S3DVertex &vertex : vertices) {
if (wicked_time_of_day < 0.5)
// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
else
// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
// Draw sun
if (wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85) {
if (!m_sun_texture) {
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driver->setMaterial(m_materials[1]);
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 (video::S3DVertex &vertex : vertices) {
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// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
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}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
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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 (video::S3DVertex &vertex : vertices) {
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// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
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}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
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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 (video::S3DVertex &vertex : vertices) {
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// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
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}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
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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 (video::S3DVertex &vertex : vertices) {
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// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
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}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
} else {
driver->setMaterial(m_materials[3]);
float d = sunsize * 1.7;
video::SColor c;
if (m_sun_tonemap)
c = video::SColor (0, 0, 0, 0);
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else
c = video::SColor (255, 255, 255, 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 (video::S3DVertex &vertex : vertices) {
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// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
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}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
}
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// Draw moon
if (wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7) {
if (!m_moon_texture) {
driver->setMaterial(m_materials[1]);
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 (video::S3DVertex &vertex : vertices) {
// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
vertex.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 (video::S3DVertex &vertex : vertices) {
// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
vertex.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 (video::S3DVertex &vertex : vertices) {
// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
vertex.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 (video::S3DVertex &vertex : vertices) {
// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
} else {
driver->setMaterial(m_materials[4]);
float d = moonsize * 1.9;
video::SColor c;
if (m_moon_tonemap)
c = video::SColor (0, 0, 0, 0);
else
c = video::SColor (255, 255, 255, 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 (video::S3DVertex &vertex : vertices) {
// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
}
// Draw far cloudy fog thing below all horizons in front of sun, moon
// and stars.
driver->setMaterial(m_materials[1]);
for (u32 j = 0; j < 4; j++) {
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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 (video::S3DVertex &vertex : vertices) {
if (j == 0)
// Don't switch
{}
else if (j == 1)
// Switch from -Z (south) to +X (east)
vertex.Pos.rotateXZBy(90);
else if (j == 2)
// Switch from -Z (south) to -X (west)
vertex.Pos.rotateXZBy(-90);
else
// Switch from -Z (south) to +Z (north)
vertex.Pos.rotateXZBy(-180);
}
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
// Draw bottom far cloudy fog thing in front of sun, moon and stars
video::SColor c = cloudyfogcolor;
vertices[0] = video::S3DVertex(-1, -1.0, -1, 0, 1, 0, c, t, t);
vertices[1] = video::S3DVertex( 1, -1.0, -1, 0, 1, 0, c, o, t);
vertices[2] = video::S3DVertex( 1, -1.0, 1, 0, 1, 0, c, o, o);
vertices[3] = video::S3DVertex(-1, -1.0, 1, 0, 1, 0, c, t, o);
driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
}
}
void Sky::update(float time_of_day, float time_brightness,
float direct_brightness, bool sunlight_seen,
CameraMode cam_mode, float yaw, float pitch)
{
// 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, cam_mode, yaw, pitch);
}
return;
}
m_time_of_day = time_of_day;
m_time_brightness = time_brightness;
m_sunlight_seen = sunlight_seen;
m_bodies_visible = true;
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bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
/*
Development colours
video::SColorf bgcolor_bright_normal_f(170. / 255, 200. / 255, 230. / 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 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);
*/
video::SColorf bgcolor_bright_normal_f = video::SColor(255, 155, 193, 240);
video::SColorf bgcolor_bright_indoor_f = video::SColor(255, 100, 100, 100);
video::SColorf bgcolor_bright_dawn_f = video::SColor(255, 186, 193, 240);
video::SColorf bgcolor_bright_night_f = video::SColor(255, 64, 144, 255);
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 skycolor_bright_night_f = video::SColor(255, 0, 107, 255);
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// pure white: becomes "diffuse light component" for clouds
video::SColorf cloudcolor_bright_normal_f = video::SColor(255, 255, 255, 255);
// dawn-factoring version of pure white (note: R is above 1.0)
video::SColorf cloudcolor_bright_dawn_f(255.0f/240.0f, 223.0f/240.0f, 191.0f/255.0f);
float cloud_color_change_fraction = 0.95;
if (sunlight_seen) {
if (std::fabs(time_brightness - m_brightness) < 0.2f) {
m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
} else {
m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
cloud_color_change_fraction = 0.0;
}
} 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 = 0.98f;
if (sunlight_seen) {
if (is_dawn) { // 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 {
if (time_brightness < 0.13f) { // Night
m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
bgcolor_bright_night_f, color_change_fraction);
m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
skycolor_bright_night_f, color_change_fraction);
} else { // Day
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_skycolor_bright_f = m_skycolor_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_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
);
// Horizon coloring based on sun and moon direction during sunset and sunrise
video::SColor pointcolor = video::SColor(m_bgcolor.getAlpha(), 255, 255, 255);
if (m_directional_colored_fog) {
if (m_horizon_blend() != 0) {
// Calculate hemisphere value from yaw, (inverted in third person front view)
s8 dir_factor = 1;
if (cam_mode > CAMERA_MODE_THIRD)
dir_factor = -1;
f32 pointcolor_blend = wrapDegrees_0_360(yaw * dir_factor + 90);
if (pointcolor_blend > 180)
pointcolor_blend = 360 - pointcolor_blend;
pointcolor_blend /= 180;
// Bound view angle to determine where transition starts and ends
pointcolor_blend = rangelim(1 - pointcolor_blend * 1.375, 0, 1 / 1.375) *
1.375;
// Combine the colors when looking up or down, otherwise turning looks weird
pointcolor_blend += (0.5 - pointcolor_blend) *
(1 - MYMIN((90 - std::fabs(pitch)) / 90 * 1.5, 1));
// Invert direction to match where the sun and moon are rising
if (m_time_of_day > 0.5)
pointcolor_blend = 1 - pointcolor_blend;
// Horizon colors of sun and moon
f32 pointcolor_light = rangelim(m_time_brightness * 3, 0.2, 1);
video::SColorf pointcolor_sun_f(1, 1, 1, 1);
if (m_sun_tonemap) {
pointcolor_sun_f.r = pointcolor_light *
(float)m_materials[3].EmissiveColor.getRed() / 255;
pointcolor_sun_f.b = pointcolor_light *
(float)m_materials[3].EmissiveColor.getBlue() / 255;
pointcolor_sun_f.g = pointcolor_light *
(float)m_materials[3].EmissiveColor.getGreen() / 255;
} else {
pointcolor_sun_f.r = pointcolor_light * 1;
pointcolor_sun_f.b = pointcolor_light *
(0.25 + (rangelim(m_time_brightness, 0.25, 0.75) - 0.25) * 2 * 0.75);
pointcolor_sun_f.g = pointcolor_light * (pointcolor_sun_f.b * 0.375 +
(rangelim(m_time_brightness, 0.05, 0.15) - 0.05) * 10 * 0.625);
}
video::SColorf pointcolor_moon_f(0.5 * pointcolor_light,
0.6 * pointcolor_light, 0.8 * pointcolor_light, 1);
if (m_moon_tonemap) {
pointcolor_moon_f.r = pointcolor_light *
(float)m_materials[4].EmissiveColor.getRed() / 255;
pointcolor_moon_f.b = pointcolor_light *
(float)m_materials[4].EmissiveColor.getBlue() / 255;
pointcolor_moon_f.g = pointcolor_light *
(float)m_materials[4].EmissiveColor.getGreen() / 255;
}
video::SColor pointcolor_sun = pointcolor_sun_f.toSColor();
video::SColor pointcolor_moon = pointcolor_moon_f.toSColor();
// Calculate the blend color
pointcolor = m_mix_scolor(pointcolor_moon, pointcolor_sun, pointcolor_blend);
}
m_bgcolor = m_mix_scolor(m_bgcolor, pointcolor, m_horizon_blend() * 0.5);
m_skycolor = m_mix_scolor(m_skycolor, pointcolor, m_horizon_blend() * 0.25);
}
float cloud_direct_brightness = 0.0f;
if (sunlight_seen) {
if (!m_directional_colored_fog) {
cloud_direct_brightness = time_brightness;
// Boost cloud brightness relative to sky, at dawn, dusk and at night
if (time_brightness < 0.7f)
cloud_direct_brightness *= 1.3f;
} else {
cloud_direct_brightness = std::fmin(m_horizon_blend() * 0.15f +
m_time_brightness, 1.0f);
// Set the same minimum cloud brightness at night
if (time_brightness < 0.5f)
cloud_direct_brightness = std::fmax(cloud_direct_brightness,
time_brightness * 1.3f);
}
} else {
cloud_direct_brightness = direct_brightness;
}
m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
m_cloudcolor_f = video::SColorf(
m_cloudcolor_bright_f.r * m_cloud_brightness,
m_cloudcolor_bright_f.g * m_cloud_brightness,
m_cloudcolor_bright_f.b * m_cloud_brightness,
1.0
);
if (m_directional_colored_fog) {
m_cloudcolor_f = m_mix_scolorf(m_cloudcolor_f,
video::SColorf(pointcolor), m_horizon_blend() * 0.25);
}
}