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diff --git a/src/client/clouds.cpp b/src/client/clouds.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 "client/renderingengine.h"
+#include "clouds.h"
+#include "noise.h"
+#include "constants.h"
+#include "debug.h"
+#include "profiler.h"
+#include "settings.h"
+#include <cmath>
+
+
+// Menu clouds are created later
+class Clouds;
+Clouds *g_menuclouds = NULL;
+irr::scene::ISceneManager *g_menucloudsmgr = NULL;
+
+// Constant for now
+static constexpr const float cloud_size = BS * 64.0f;
+
+static void cloud_3d_setting_changed(const std::string &settingname, void *data)
+{
+ ((Clouds *)data)->readSettings();
+}
+
+Clouds::Clouds(scene::ISceneManager* mgr,
+ s32 id,
+ u32 seed
+):
+ scene::ISceneNode(mgr->getRootSceneNode(), mgr, id),
+ m_seed(seed)
+{
+ m_material.setFlag(video::EMF_LIGHTING, false);
+ //m_material.setFlag(video::EMF_BACK_FACE_CULLING, false);
+ m_material.setFlag(video::EMF_BACK_FACE_CULLING, true);
+ m_material.setFlag(video::EMF_BILINEAR_FILTER, false);
+ m_material.setFlag(video::EMF_FOG_ENABLE, true);
+ m_material.setFlag(video::EMF_ANTI_ALIASING, true);
+ //m_material.MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
+ m_material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
+
+ m_params.height = 120;
+ m_params.density = 0.4f;
+ m_params.thickness = 16.0f;
+ m_params.color_bright = video::SColor(229, 240, 240, 255);
+ m_params.color_ambient = video::SColor(255, 0, 0, 0);
+ m_params.speed = v2f(0.0f, -2.0f);
+
+ readSettings();
+ g_settings->registerChangedCallback("enable_3d_clouds",
+ &cloud_3d_setting_changed, this);
+
+ updateBox();
+}
+
+Clouds::~Clouds()
+{
+ g_settings->deregisterChangedCallback("enable_3d_clouds",
+ &cloud_3d_setting_changed, this);
+}
+
+void Clouds::OnRegisterSceneNode()
+{
+ if(IsVisible)
+ {
+ SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
+ //SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
+ }
+
+ ISceneNode::OnRegisterSceneNode();
+}
+
+void Clouds::render()
+{
+
+ if (m_params.density <= 0.0f)
+ return; // no need to do anything
+
+ video::IVideoDriver* driver = SceneManager->getVideoDriver();
+
+ if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_TRANSPARENT)
+ //if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SOLID)
+ return;
+
+ ScopeProfiler sp(g_profiler, "Rendering of clouds, avg", SPT_AVG);
+
+ int num_faces_to_draw = m_enable_3d ? 6 : 1;
+
+ m_material.setFlag(video::EMF_BACK_FACE_CULLING, m_enable_3d);
+
+ driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
+ driver->setMaterial(m_material);
+
+ /*
+ Clouds move from Z+ towards Z-
+ */
+
+ const float cloud_full_radius = cloud_size * m_cloud_radius_i;
+
+ v2f camera_pos_2d(m_camera_pos.X, m_camera_pos.Z);
+ // Position of cloud noise origin from the camera
+ v2f cloud_origin_from_camera_f = m_origin - camera_pos_2d;
+ // The center point of drawing in the noise
+ v2f center_of_drawing_in_noise_f = -cloud_origin_from_camera_f;
+ // The integer center point of drawing in the noise
+ v2s16 center_of_drawing_in_noise_i(
+ std::floor(center_of_drawing_in_noise_f.X / cloud_size),
+ std::floor(center_of_drawing_in_noise_f.Y / cloud_size)
+ );
+
+ // The world position of the integer center point of drawing in the noise
+ v2f world_center_of_drawing_in_noise_f = v2f(
+ center_of_drawing_in_noise_i.X * cloud_size,
+ center_of_drawing_in_noise_i.Y * cloud_size
+ ) + m_origin;
+
+ /*video::SColor c_top(128,b*240,b*240,b*255);
+ video::SColor c_side_1(128,b*230,b*230,b*255);
+ video::SColor c_side_2(128,b*220,b*220,b*245);
+ video::SColor c_bottom(128,b*205,b*205,b*230);*/
+ video::SColorf c_top_f(m_color);
+ video::SColorf c_side_1_f(m_color);
+ video::SColorf c_side_2_f(m_color);
+ video::SColorf c_bottom_f(m_color);
+ c_side_1_f.r *= 0.95;
+ c_side_1_f.g *= 0.95;
+ c_side_1_f.b *= 0.95;
+ c_side_2_f.r *= 0.90;
+ c_side_2_f.g *= 0.90;
+ c_side_2_f.b *= 0.90;
+ c_bottom_f.r *= 0.80;
+ c_bottom_f.g *= 0.80;
+ c_bottom_f.b *= 0.80;
+ video::SColor c_top = c_top_f.toSColor();
+ video::SColor c_side_1 = c_side_1_f.toSColor();
+ video::SColor c_side_2 = c_side_2_f.toSColor();
+ video::SColor c_bottom = c_bottom_f.toSColor();
+
+ // Get fog parameters for setting them back later
+ video::SColor fog_color(0,0,0,0);
+ video::E_FOG_TYPE fog_type = video::EFT_FOG_LINEAR;
+ f32 fog_start = 0;
+ f32 fog_end = 0;
+ f32 fog_density = 0;
+ bool fog_pixelfog = false;
+ bool fog_rangefog = false;
+ driver->getFog(fog_color, fog_type, fog_start, fog_end, fog_density,
+ fog_pixelfog, fog_rangefog);
+
+ // Set our own fog
+ driver->setFog(fog_color, fog_type, cloud_full_radius * 0.5,
+ cloud_full_radius*1.2, fog_density, fog_pixelfog, fog_rangefog);
+
+ // Read noise
+
+ bool *grid = new bool[m_cloud_radius_i * 2 * m_cloud_radius_i * 2];
+
+
+ for(s16 zi = -m_cloud_radius_i; zi < m_cloud_radius_i; zi++) {
+ u32 si = (zi + m_cloud_radius_i) * m_cloud_radius_i * 2 + m_cloud_radius_i;
+
+ for (s16 xi = -m_cloud_radius_i; xi < m_cloud_radius_i; xi++) {
+ u32 i = si + xi;
+
+ grid[i] = gridFilled(
+ xi + center_of_drawing_in_noise_i.X,
+ zi + center_of_drawing_in_noise_i.Y
+ );
+ }
+ }
+
+#define GETINDEX(x, z, radius) (((z)+(radius))*(radius)*2 + (x)+(radius))
+#define INAREA(x, z, radius) \
+ ((x) >= -(radius) && (x) < (radius) && (z) >= -(radius) && (z) < (radius))
+
+ for (s16 zi0= -m_cloud_radius_i; zi0 < m_cloud_radius_i; zi0++)
+ for (s16 xi0= -m_cloud_radius_i; xi0 < m_cloud_radius_i; xi0++)
+ {
+ s16 zi = zi0;
+ s16 xi = xi0;
+ // Draw from front to back (needed for transparency)
+ /*if(zi <= 0)
+ zi = -m_cloud_radius_i - zi;
+ if(xi <= 0)
+ xi = -m_cloud_radius_i - xi;*/
+ // Draw from back to front
+ if(zi >= 0)
+ zi = m_cloud_radius_i - zi - 1;
+ if(xi >= 0)
+ xi = m_cloud_radius_i - xi - 1;
+
+ u32 i = GETINDEX(xi, zi, m_cloud_radius_i);
+
+ if (!grid[i])
+ continue;
+
+ v2f p0 = v2f(xi,zi)*cloud_size + world_center_of_drawing_in_noise_f;
+
+ video::S3DVertex v[4] = {
+ video::S3DVertex(0,0,0, 0,0,0, c_top, 0, 1),
+ video::S3DVertex(0,0,0, 0,0,0, c_top, 1, 1),
+ video::S3DVertex(0,0,0, 0,0,0, c_top, 1, 0),
+ video::S3DVertex(0,0,0, 0,0,0, c_top, 0, 0)
+ };
+
+ /*if(zi <= 0 && xi <= 0){
+ v[0].Color.setBlue(255);
+ v[1].Color.setBlue(255);
+ v[2].Color.setBlue(255);
+ v[3].Color.setBlue(255);
+ }*/
+
+ f32 rx = cloud_size / 2.0f;
+ // if clouds are flat, the top layer should be at the given height
+ f32 ry = m_enable_3d ? m_params.thickness * BS : 0.0f;
+ f32 rz = cloud_size / 2;
+
+ for(int i=0; i<num_faces_to_draw; i++)
+ {
+ switch(i)
+ {
+ case 0: // top
+ for (video::S3DVertex &vertex : v) {
+ vertex.Normal.set(0,1,0);
+ }
+ v[0].Pos.set(-rx, ry,-rz);
+ v[1].Pos.set(-rx, ry, rz);
+ v[2].Pos.set( rx, ry, rz);
+ v[3].Pos.set( rx, ry,-rz);
+ break;
+ case 1: // back
+ if (INAREA(xi, zi - 1, m_cloud_radius_i)) {
+ u32 j = GETINDEX(xi, zi - 1, m_cloud_radius_i);
+ if(grid[j])
+ continue;
+ }
+ for (video::S3DVertex &vertex : v) {
+ vertex.Color = c_side_1;
+ vertex.Normal.set(0,0,-1);
+ }
+ v[0].Pos.set(-rx, ry,-rz);
+ v[1].Pos.set( rx, ry,-rz);
+ v[2].Pos.set( rx, 0,-rz);
+ v[3].Pos.set(-rx, 0,-rz);
+ break;
+ case 2: //right
+ if (INAREA(xi + 1, zi, m_cloud_radius_i)) {
+ u32 j = GETINDEX(xi+1, zi, m_cloud_radius_i);
+ if(grid[j])
+ continue;
+ }
+ for (video::S3DVertex &vertex : v) {
+ vertex.Color = c_side_2;
+ vertex.Normal.set(1,0,0);
+ }
+ v[0].Pos.set( rx, ry,-rz);
+ v[1].Pos.set( rx, ry, rz);
+ v[2].Pos.set( rx, 0, rz);
+ v[3].Pos.set( rx, 0,-rz);
+ break;
+ case 3: // front
+ if (INAREA(xi, zi + 1, m_cloud_radius_i)) {
+ u32 j = GETINDEX(xi, zi + 1, m_cloud_radius_i);
+ if(grid[j])
+ continue;
+ }
+ for (video::S3DVertex &vertex : v) {
+ vertex.Color = c_side_1;
+ vertex.Normal.set(0,0,-1);
+ }
+ v[0].Pos.set( rx, ry, rz);
+ v[1].Pos.set(-rx, ry, rz);
+ v[2].Pos.set(-rx, 0, rz);
+ v[3].Pos.set( rx, 0, rz);
+ break;
+ case 4: // left
+ if (INAREA(xi-1, zi, m_cloud_radius_i)) {
+ u32 j = GETINDEX(xi-1, zi, m_cloud_radius_i);
+ if(grid[j])
+ continue;
+ }
+ for (video::S3DVertex &vertex : v) {
+ vertex.Color = c_side_2;
+ vertex.Normal.set(-1,0,0);
+ }
+ v[0].Pos.set(-rx, ry, rz);
+ v[1].Pos.set(-rx, ry,-rz);
+ v[2].Pos.set(-rx, 0,-rz);
+ v[3].Pos.set(-rx, 0, rz);
+ break;
+ case 5: // bottom
+ for (video::S3DVertex &vertex : v) {
+ vertex.Color = c_bottom;
+ vertex.Normal.set(0,-1,0);
+ }
+ v[0].Pos.set( rx, 0, rz);
+ v[1].Pos.set(-rx, 0, rz);
+ v[2].Pos.set(-rx, 0,-rz);
+ v[3].Pos.set( rx, 0,-rz);
+ break;
+ }
+
+ v3f pos(p0.X, m_params.height * BS, p0.Y);
+ pos -= intToFloat(m_camera_offset, BS);
+
+ for (video::S3DVertex &vertex : v)
+ vertex.Pos += pos;
+ u16 indices[] = {0,1,2,2,3,0};
+ driver->drawVertexPrimitiveList(v, 4, indices, 2,
+ video::EVT_STANDARD, scene::EPT_TRIANGLES, video::EIT_16BIT);
+ }
+ }
+
+ delete[] grid;
+
+ // Restore fog settings
+ driver->setFog(fog_color, fog_type, fog_start, fog_end, fog_density,
+ fog_pixelfog, fog_rangefog);
+}
+
+void Clouds::step(float dtime)
+{
+ m_origin = m_origin + dtime * BS * m_params.speed;
+}
+
+void Clouds::update(const v3f &camera_p, const video::SColorf &color_diffuse)
+{
+ m_camera_pos = camera_p;
+ m_color.r = MYMIN(MYMAX(color_diffuse.r * m_params.color_bright.getRed(),
+ m_params.color_ambient.getRed()), 255) / 255.0f;
+ m_color.g = MYMIN(MYMAX(color_diffuse.g * m_params.color_bright.getGreen(),
+ m_params.color_ambient.getGreen()), 255) / 255.0f;
+ m_color.b = MYMIN(MYMAX(color_diffuse.b * m_params.color_bright.getBlue(),
+ m_params.color_ambient.getBlue()), 255) / 255.0f;
+ m_color.a = m_params.color_bright.getAlpha() / 255.0f;
+
+ // is the camera inside the cloud mesh?
+ m_camera_inside_cloud = false; // default
+ if (m_enable_3d) {
+ float camera_height = camera_p.Y;
+ if (camera_height >= m_box.MinEdge.Y &&
+ camera_height <= m_box.MaxEdge.Y) {
+ v2f camera_in_noise;
+ camera_in_noise.X = floor((camera_p.X - m_origin.X) / cloud_size + 0.5);
+ camera_in_noise.Y = floor((camera_p.Z - m_origin.Y) / cloud_size + 0.5);
+ bool filled = gridFilled(camera_in_noise.X, camera_in_noise.Y);
+ m_camera_inside_cloud = filled;
+ }
+ }
+}
+
+void Clouds::readSettings()
+{
+ m_cloud_radius_i = g_settings->getU16("cloud_radius");
+ m_enable_3d = g_settings->getBool("enable_3d_clouds");
+}
+
+bool Clouds::gridFilled(int x, int y) const
+{
+ float cloud_size_noise = cloud_size / (BS * 200.f);
+ float noise = noise2d_perlin(
+ (float)x * cloud_size_noise,
+ (float)y * cloud_size_noise,
+ m_seed, 3, 0.5);
+ // normalize to 0..1 (given 3 octaves)
+ static constexpr const float noise_bound = 1.0f + 0.5f + 0.25f;
+ float density = noise / noise_bound * 0.5f + 0.5f;
+ return (density < m_params.density);
+}
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