Added an experimental "far view" thing. Doesn't work exactly like it should and not suitable for real use yet, and might never be.

minetest.conf.example

@@ -58,6 +58,12 @@
 # Whether to fog out the end of the visible area
 #enable_fog = true
 
+# Enable/disable clouds
+#enable_clouds = true
+
+# Experimental
+#enable_farmesh = false
+
 # Enable a bit lower water surface; disable for speed
 #new_style_water = true
 

src/CMakeLists.txt

@@ -85,6 +85,7 @@ set(common_SRCS
 # Client sources
 set(minetest_SRCS
 	${common_SRCS}
+	farmesh.cpp
 	keycode.cpp
 	clouds.cpp
 	clientobject.cpp

src/clouds.cpp

@@ -58,8 +58,8 @@ void Clouds::OnRegisterSceneNode()
 {
 	if(IsVisible)
 	{
-		SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 		//SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
+		SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 	}
 
 	ISceneNode::OnRegisterSceneNode();

src/defaultsettings.cpp

@@ -61,11 +61,12 @@ void set_default_settings()
 	g_settings.setDefault("enable_texture_atlas", "true");
 	g_settings.setDefault("texture_path", "");
 	g_settings.setDefault("video_driver", "opengl");
-	
 	g_settings.setDefault("free_move", "false");
 	g_settings.setDefault("continuous_forward", "false");
 	g_settings.setDefault("fast_move", "false");
 	g_settings.setDefault("invert_mouse", "false");
+	g_settings.setDefault("enable_farmesh", "false");
+	g_settings.setDefault("enable_clouds", "true");
 
 	// Server stuff
 	g_settings.setDefault("enable_experimental", "false");

src/farmesh.cpp

@@ -0,0 +1,253 @@
+/*
+Part of Minetest-c55
+Copyright (C) 2011 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 General Public License as published by
+the Free Software Foundation; either version 2 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 General Public License for more details.
+
+You should have received a copy of the GNU 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.
+*/
+
+/*
+	A quick messy implementation of terrain rendering for a long
+	distance according to map seed
+*/
+
+#include "farmesh.h"
+#include "constants.h"
+#include "debug.h"
+#include "noise.h"
+#include "map.h"
+
+FarMesh::FarMesh(
+		scene::ISceneNode* parent,
+		scene::ISceneManager* mgr,
+		s32 id,
+		u64 seed
+):
+	scene::ISceneNode(parent, mgr, id),
+	m_seed(seed),
+	m_camera_pos(0,0),
+	m_time(0)
+{
+	dstream<<__FUNCTION_NAME<<std::endl;
+
+	m_material.setFlag(video::EMF_LIGHTING, 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, false);
+	//m_material.setFlag(video::EMF_ANTI_ALIASING, true);
+	//m_material.MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
+
+	m_box = core::aabbox3d<f32>(-BS*1000000,-BS*31000,-BS*1000000,
+			BS*1000000,BS*31000,BS*1000000);
+
+}
+
+FarMesh::~FarMesh()
+{
+	dstream<<__FUNCTION_NAME<<std::endl;
+}
+
+void FarMesh::OnRegisterSceneNode()
+{
+	if(IsVisible)
+	{
+		//SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
+		//SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
+		SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
+	}
+
+	ISceneNode::OnRegisterSceneNode();
+}
+
+#define MYROUND(x) (x > 0.0 ? (int)x : (int)x - 1)
+
+// Temporary hack
+core::map<v2s16, float> g_heights;
+
+float ground_height(u64 seed, v2s16 p2d)
+{
+	core::map<v2s16, float>::Node *n = g_heights.find(p2d);
+	if(n)
+		return n->getValue();
+	float avg_mud_amount = 4;
+	float gh = BS*base_rock_level_2d(seed, p2d) + avg_mud_amount*BS;
+	//gh *= 10;
+	g_heights[p2d] = gh;
+	return gh;
+}
+
+void FarMesh::render()
+{
+	video::IVideoDriver* driver = SceneManager->getVideoDriver();
+
+	/*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_TRANSPARENT)
+		return;*/
+	/*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SOLID)
+		return;*/
+	if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SKY_BOX)
+		return;
+
+	driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
+	driver->setMaterial(m_material);
+	
+	const s16 grid_radius_i = 12;
+	const float grid_size = BS*50;
+	const v2f grid_speed(-BS*0, 0);
+	
+	// Position of grid noise origin in world coordinates
+	v2f world_grid_origin_pos_f(0,0);
+	// Position of grid noise origin from the camera
+	v2f grid_origin_from_camera_f = world_grid_origin_pos_f - m_camera_pos;
+	// The center point of drawing in the noise
+	v2f center_of_drawing_in_noise_f = -grid_origin_from_camera_f;
+	// The integer center point of drawing in the noise
+	v2s16 center_of_drawing_in_noise_i(
+		MYROUND(center_of_drawing_in_noise_f.X / grid_size),
+		MYROUND(center_of_drawing_in_noise_f.Y / grid_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 * grid_size,
+		center_of_drawing_in_noise_i.Y * grid_size
+	) + world_grid_origin_pos_f;
+
+	for(s16 zi=-grid_radius_i; zi<grid_radius_i; zi++)
+	for(s16 xi=-grid_radius_i; xi<grid_radius_i; xi++)
+	{
+		v2s16 p_in_noise_i(
+			xi+center_of_drawing_in_noise_i.X,
+			zi+center_of_drawing_in_noise_i.Y
+		);
+
+		/*if((p_in_noise_i.X + p_in_noise_i.Y)%2==0)
+			continue;*/
+		/*if((p_in_noise_i.X/2 + p_in_noise_i.Y/2)%2==0)
+			continue;*/
+
+		v2f p0 = v2f(xi,zi)*grid_size + world_center_of_drawing_in_noise_f;
+		
+		/*double noise[4];
+		double d = 100*BS;
+		noise[0] = d*noise2d_perlin(
+				(float)(p_in_noise_i.X+0)*grid_size/BS/100,
+				(float)(p_in_noise_i.Y+0)*grid_size/BS/100,
+				m_seed, 3, 0.5);
+		
+		noise[1] = d*noise2d_perlin(
+				(float)(p_in_noise_i.X+0)*grid_size/BS/100,
+				(float)(p_in_noise_i.Y+1)*grid_size/BS/100,
+				m_seed, 3, 0.5);
+		
+		noise[2] = d*noise2d_perlin(
+				(float)(p_in_noise_i.X+1)*grid_size/BS/100,
+				(float)(p_in_noise_i.Y+1)*grid_size/BS/100,
+				m_seed, 3, 0.5);
+		
+		noise[3] = d*noise2d_perlin(
+				(float)(p_in_noise_i.X+1)*grid_size/BS/100,
+				(float)(p_in_noise_i.Y+0)*grid_size/BS/100,
+				m_seed, 3, 0.5);*/
+		
+		float noise[4];
+		noise[0] = ground_height(m_seed, v2s16(
+				(p_in_noise_i.X+0)*grid_size/BS,
+				(p_in_noise_i.Y+0)*grid_size/BS));
+		noise[1] = ground_height(m_seed, v2s16(
+				(p_in_noise_i.X+0)*grid_size/BS,
+				(p_in_noise_i.Y+1)*grid_size/BS));
+		noise[2] = ground_height(m_seed, v2s16(
+				(p_in_noise_i.X+1)*grid_size/BS,
+				(p_in_noise_i.Y+1)*grid_size/BS));
+		noise[3] = ground_height(m_seed, v2s16(
+				(p_in_noise_i.X+1)*grid_size/BS,
+				(p_in_noise_i.Y+0)*grid_size/BS));
+
+		float h_min = BS*65535;
+		float h_max = -BS*65536;
+		for(u32 i=0; i<4; i++)
+		{
+			if(noise[i] < h_min)
+				h_min = noise[i];
+			if(noise[i] > h_max)
+				h_max = noise[i];
+		}
+		float steepness = (h_max - h_min)/grid_size;
+		
+		float h_avg = (noise[0]+noise[1]+noise[2]+noise[3])/4.0;
+		float light_f = noise[0]+noise[1]-noise[2]-noise[3];
+		light_f /= 100;
+		if(light_f < -1.0) light_f = -1.0;
+		if(light_f > 1.0) light_f = 1.0;
+		//light_f += 1.0;
+		//light_f /= 2.0;
+		
+		v2f p1 = p0 + v2f(1,1)*grid_size;
+
+		video::SColor c;
+		// Detect water
+		if(h_avg < WATER_LEVEL*BS && h_max < (WATER_LEVEL+5)*BS)
+		{
+			c = video::SColor(128,59,86,146);
+			/*// Set to water level
+			for(u32 i=0; i<4; i++)
+			{
+				if(noise[i] < BS*WATER_LEVEL)
+					noise[i] = BS*WATER_LEVEL;
+			}*/
+			light_f = 0;
+		}
+		else if(steepness > 2.0)
+			c = video::SColor(128,128,128,128);
+		else
+			c = video::SColor(128,107,134,51);
+		
+		// Set to water level
+		for(u32 i=0; i<4; i++)
+		{
+			if(noise[i] < BS*WATER_LEVEL)
+				noise[i] = BS*WATER_LEVEL;
+		}
+
+		float b = m_brightness + light_f*0.1*m_brightness;
+		if(b < 0) b = 0;
+		if(b > 2) b = 2;
+		
+		c = video::SColor(128, b*c.getRed(), b*c.getGreen(), b*c.getBlue());
+
+		video::S3DVertex vertices[4] =
+		{
+			video::S3DVertex(p0.X,noise[0],p0.Y, 0,0,0, c, 0,1),
+			video::S3DVertex(p0.X,noise[1],p1.Y, 0,0,0, c, 1,1),
+			video::S3DVertex(p1.X,noise[2],p1.Y, 0,0,0, c, 1,0),
+			video::S3DVertex(p1.X,noise[3],p0.Y, 0,0,0, c, 0,0),
+		};
+		u16 indices[] = {0,1,2,2,3,0};
+		driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
+				video::EVT_STANDARD, scene::EPT_TRIANGLES, video::EIT_16BIT);
+	}
+
+	driver->clearZBuffer();
+}
+
+void FarMesh::step(float dtime)
+{
+	m_time += dtime;
+}
+
+void FarMesh::update(v2f camera_p, float brightness)
+{
+	m_camera_pos = camera_p;
+	m_brightness = brightness;
+}
+

src/farmesh.h

@@ -0,0 +1,84 @@
+/*
+Part of Minetest-c55
+Copyright (C) 2010-2011 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 General Public License as published by
+the Free Software Foundation; either version 2 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 General Public License for more details.
+
+You should have received a copy of the GNU 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.
+*/
+
+#ifndef FARMESH_HEADER
+#define FARMESH_HEADER
+
+/*
+	A quick messy implementation of terrain rendering for a long
+	distance according to map seed
+*/
+
+#include "common_irrlicht.h"
+
+class FarMesh : public scene::ISceneNode
+{
+public:
+	FarMesh(
+			scene::ISceneNode* parent,
+			scene::ISceneManager* mgr,
+			s32 id,
+			u64 seed
+	);
+
+	~FarMesh();
+
+	/*
+		ISceneNode methods
+	*/
+
+	virtual void OnRegisterSceneNode();
+
+	virtual void render();
+	
+	virtual const core::aabbox3d<f32>& getBoundingBox() const
+	{
+		return m_box;
+	}
+
+	virtual u32 getMaterialCount() const
+	{
+		return 1;
+	}
+
+	virtual video::SMaterial& getMaterial(u32 i)
+	{
+		return m_material;
+	}
+	
+	/*
+		Other stuff
+	*/
+
+	void step(float dtime);
+
+	void update(v2f camera_p, float brightness);
+
+private:
+	video::SMaterial m_material;
+	core::aabbox3d<f32> m_box;
+	float m_cloud_y;
+	float m_brightness;
+	u32 m_seed;
+	v2f m_camera_pos;
+	float m_time;
+};
+
+#endif
+

src/game.cpp

@@ -30,6 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "config.h"
 #include "clouds.h"
 #include "keycode.h"
+#include "farmesh.h"
 
 /*
 	Setting this to 1 enables a special camera mode that forces
@@ -595,6 +596,10 @@ void update_skybox(video::IVideoDriver* driver,
 		skybox->remove();
 	}
 	
+	// Disable skybox if FarMesh is enabled
+	if(g_settings.getBool("enable_farmesh"))
+		return;
+	
 	if(brightness >= 0.5)
 	{
 		skybox = smgr->addSkyBoxSceneNode(
@@ -815,8 +820,21 @@ void the_game(
 	
 	float cloud_height = BS*100;
 	Clouds *clouds = NULL;
-	clouds = new Clouds(smgr->getRootSceneNode(), smgr, -1,
+	if(g_settings.getBool("enable_clouds"))
-			cloud_height, time(0));
+	{
+		clouds = new Clouds(smgr->getRootSceneNode(), smgr, -1,
+				cloud_height, time(0));
+	}
+	
+	/*
+		FarMesh
+	*/
+
+	FarMesh *farmesh = NULL;
+	if(g_settings.getBool("enable_farmesh"))
+	{
+		farmesh = new FarMesh(smgr->getRootSceneNode(), smgr, -1, client.getMapSeed());
+	}
 
 	/*
 		Move into game
@@ -1789,6 +1807,16 @@ void the_game(
 					0.05+brightness*0.95);
 		}
 		
+		/*
+			Update farmesh (TODO: Remove from here)
+		*/
+		if(farmesh)
+		{
+			farmesh->step(dtime);
+			farmesh->update(v2f(player_position.X, player_position.Z),
+					0.05+brightness*0.95);
+		}
+		
 		// Store brightness value
 		old_brightness = brightness;
 
@@ -1999,6 +2027,13 @@ void the_game(
 			//driver->beginScene(false, true, bgcolor);
 			beginscenetime = timer.stop(true);
 		}
+		
+		/*
+			Draw farmesh before everything else
+		*/
+		{
+			//farmesh->render();
+		}
 
 		//timer3.stop();
 		
@@ -2131,7 +2166,8 @@ void the_game(
 	/*
 		Drop stuff
 	*/
-	clouds->drop();
+	if(clouds)
+		clouds->drop();
 	
 	/*
 		Draw a "shutting down" screen, which will be shown while the map