Clouds: Make cloud area radius settable in .conf

minetest.conf.example

@@ -142,6 +142,9 @@
 #    Enable/disable clouds
 #enable_clouds = true
 #cloud_height = 120
+#    Radius of cloud area stated in number of 64 node cloud squares.
+#    Values > 22 will start to produce clipping of the cloud area corners.
+#cloud_radius = 12
 #enable_3d_clouds = true
 #    Use a cloud animation for the main menu background
 #menu_clouds = true

src/clouds.cpp

@@ -55,6 +55,8 @@ Clouds::Clouds(
 	m_cloud_y = BS * (cloudheight ? cloudheight :
 				g_settings->getS16("cloud_height"));
 
+	m_cloud_radius_i = g_settings->getU16("cloud_radius");
+
 	m_box = core::aabbox3d<f32>(-BS*1000000,m_cloud_y-BS,-BS*1000000,
 			BS*1000000,m_cloud_y+BS,BS*1000000);
 
@@ -96,14 +98,13 @@ void Clouds::render()
 	driver->setMaterial(m_material);
 	
 	/*
-		Clouds move from X+ towards X-
+		Clouds move from Z+ towards Z-
 	*/
 
-	const s16 cloud_radius_i = 12;
 	const float cloud_size = BS * 64;
 	const v2f cloud_speed(0, -BS * 2);
 	
-	const float cloud_full_radius = cloud_size * cloud_radius_i;
+	const float cloud_full_radius = cloud_size * m_cloud_radius_i;
 	
 	// Position of cloud noise origin in world coordinates
 	v2f world_cloud_origin_pos_f = m_time * cloud_speed;
@@ -165,14 +166,14 @@ void Clouds::render()
 
 	// Read noise
 
-	bool *grid = new bool[cloud_radius_i * 2 * cloud_radius_i * 2];
+	bool *grid = new bool[m_cloud_radius_i * 2 * m_cloud_radius_i * 2];
 
 	float cloud_size_noise = cloud_size / BS / 200;
 
-	for(s16 zi = -cloud_radius_i; zi < cloud_radius_i; zi++) {
+	for(s16 zi = -m_cloud_radius_i; zi < m_cloud_radius_i; zi++) {
-		u32 si = (zi + cloud_radius_i) * cloud_radius_i * 2 + cloud_radius_i;
+		u32 si = (zi + m_cloud_radius_i) * m_cloud_radius_i * 2 + m_cloud_radius_i;
 
-		for(s16 xi = -cloud_radius_i; xi < cloud_radius_i; xi++) {
+		for (s16 xi = -m_cloud_radius_i; xi < m_cloud_radius_i; xi++) {
 			u32 i = si + xi;
 
 			v2s16 p_in_noise_i(
@@ -192,23 +193,23 @@ void Clouds::render()
 #define INAREA(x, z, radius) \
 	((x) >= -(radius) && (x) < (radius) && (z) >= -(radius) && (z) < (radius))
 
-	for(s16 zi0=-cloud_radius_i; zi0<cloud_radius_i; zi0++)
+	for (s16 zi0= -m_cloud_radius_i; zi0 < m_cloud_radius_i; zi0++)
-	for(s16 xi0=-cloud_radius_i; xi0<cloud_radius_i; xi0++)
+	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 = -cloud_radius_i - zi;
+			zi = -m_cloud_radius_i - zi;
 		if(xi <= 0)
-			xi = -cloud_radius_i - xi;*/
+			xi = -m_cloud_radius_i - xi;*/
 		// Draw from back to front
 		if(zi >= 0)
-			zi = cloud_radius_i - zi - 1;
+			zi = m_cloud_radius_i - zi - 1;
 		if(xi >= 0)
-			xi = cloud_radius_i - xi - 1;
+			xi = m_cloud_radius_i - xi - 1;
 
-		u32 i = GETINDEX(xi, zi, cloud_radius_i);
+		u32 i = GETINDEX(xi, zi, m_cloud_radius_i);
 
 		if(grid[i] == false)
 			continue;
@@ -247,8 +248,8 @@ void Clouds::render()
 				v[3].Pos.set( rx, ry,-rz);
 				break;
 			case 1: // back
-				if(INAREA(xi, zi-1, cloud_radius_i)){
+				if (INAREA(xi, zi - 1, m_cloud_radius_i)) {
-					u32 j = GETINDEX(xi, zi-1, cloud_radius_i);
+					u32 j = GETINDEX(xi, zi - 1, m_cloud_radius_i);
 					if(grid[j])
 						continue;
 				}
@@ -262,8 +263,8 @@ void Clouds::render()
 				v[3].Pos.set(-rx,-ry,-rz);
 				break;
 			case 2: //right
-				if(INAREA(xi+1, zi, cloud_radius_i)){
+				if (INAREA(xi + 1, zi, m_cloud_radius_i)) {
-					u32 j = GETINDEX(xi+1, zi, cloud_radius_i);
+					u32 j = GETINDEX(xi+1, zi, m_cloud_radius_i);
 					if(grid[j])
 						continue;
 				}
@@ -277,8 +278,8 @@ void Clouds::render()
 				v[3].Pos.set( rx,-ry,-rz);
 				break;
 			case 3: // front
-				if(INAREA(xi, zi+1, cloud_radius_i)){
+				if (INAREA(xi, zi + 1, m_cloud_radius_i)) {
-					u32 j = GETINDEX(xi, zi+1, cloud_radius_i);
+					u32 j = GETINDEX(xi, zi + 1, m_cloud_radius_i);
 					if(grid[j])
 						continue;
 				}
@@ -292,8 +293,8 @@ void Clouds::render()
 				v[3].Pos.set( rx,-ry, rz);
 				break;
 			case 4: // left
-				if(INAREA(xi-1, zi, cloud_radius_i)){
+				if (INAREA(xi-1, zi, m_cloud_radius_i)) {
-					u32 j = GETINDEX(xi-1, zi, cloud_radius_i);
+					u32 j = GETINDEX(xi-1, zi, m_cloud_radius_i);
 					if(grid[j])
 						continue;
 				}

src/clouds.h

@@ -87,6 +87,7 @@ private:
 	video::SMaterial m_material;
 	core::aabbox3d<f32> m_box;
 	float m_cloud_y;
+	u16 m_cloud_radius_i;
 	video::SColorf m_color;
 	u32 m_seed;
 	v2f m_camera_pos;

src/defaultsettings.cpp

@@ -127,6 +127,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("fall_bobbing_amount", "0.0");
 	settings->setDefault("enable_3d_clouds", "true");
 	settings->setDefault("cloud_height", "120");
+	settings->setDefault("cloud_radius", "12");
 	settings->setDefault("menu_clouds", "true");
 	settings->setDefault("opaque_water", "false");
 	settings->setDefault("console_color", "(0,0,0)");