mirror of
https://gitlab.com/gaelysam/mapgen_rivers.git
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Optionally disable distorsion
by setting 'mapgen_rivers_distort = false' in minetest.conf
This commit is contained in:
Gaël de Sailly
parent
25c5cb2e1f
commit
103cd49d78
118
init.lua
118
init.lua
@ -8,6 +8,7 @@ local blocksize = mapgen_rivers.blocksize
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local sea_level = mapgen_rivers.sea_level
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local riverbed_slope = mapgen_rivers.riverbed_slope
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local elevation_chill = mapgen_rivers.elevation_chill
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local use_distort = mapgen_rivers.distort
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dofile(modpath .. 'noises.lua')
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@ -48,48 +49,58 @@ local function generate(minp, maxp, seed)
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y = chulens.y+1,
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z = chulens.z,
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}
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noise_x_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.distort_x, mapsize)
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noise_z_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.distort_z, mapsize)
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if use_distort then
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noise_x_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.distort_x, mapsize)
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noise_z_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.distort_z, mapsize)
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noise_distort_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.distort_amplitude, chulens)
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end
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noise_heat_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.heat, chulens)
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noise_heat_blend_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.heat_blend, chulens)
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noise_distort_obj = minetest.get_perlin_map(mapgen_rivers.noise_params.distort_amplitude, chulens)
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init = true
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end
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local minp2d = {x=minp.x, y=minp.z}
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noise_x_obj:get_3d_map_flat(minp, noise_x_map)
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noise_z_obj:get_3d_map_flat(minp, noise_z_map)
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noise_distort_obj:get_2d_map_flat(minp2d, noise_distort_map)
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if use_distort then
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noise_x_obj:get_3d_map_flat(minp, noise_x_map)
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noise_z_obj:get_3d_map_flat(minp, noise_z_map)
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noise_distort_obj:get_2d_map_flat(minp2d, noise_distort_map)
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end
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noise_heat_obj:get_2d_map_flat(minp2d, noise_heat_map)
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noise_heat_blend_obj:get_2d_map_flat(minp2d, noise_heat_blend_map)
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local xmin, xmax, zmin, zmax = minp.x, maxp.x, minp.z, maxp.z
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local i = 0
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local i2d = 0
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for z=minp.z, maxp.z do
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for y=minp.y, maxp.y+1 do
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for x=minp.x, maxp.x do
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i = i+1
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i2d = i2d+1
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local distort = noise_distort_map[i2d]
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local xv = noise_x_map[i]*distort + x
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if xv < xmin then xmin = xv end
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if xv > xmax then xmax = xv end
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noise_x_map[i] = xv
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local zv = noise_z_map[i]*distort + z
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if zv < zmin then zmin = zv end
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if zv > zmax then zmax = zv end
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noise_z_map[i] = zv
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end
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i2d = i2d-chulens.x
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end
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end
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local terrain_map, lake_map, incr, i_origin
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local pminp = {x=math.floor(xmin), z=math.floor(zmin)}
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local pmaxp = {x=math.floor(xmax)+1, z=math.floor(zmax)+1}
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local incr = pmaxp.x-pminp.x+1
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local i_origin = 1 - pminp.z*incr - pminp.x
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local terrain_map, lake_map = heightmaps(pminp, pmaxp)
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if use_distort then
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local xmin, xmax, zmin, zmax = minp.x, maxp.x, minp.z, maxp.z
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local i = 0
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local i2d = 0
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for z=minp.z, maxp.z do
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for y=minp.y, maxp.y+1 do
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for x=minp.x, maxp.x do
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i = i+1
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i2d = i2d+1
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local distort = noise_distort_map[i2d]
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local xv = noise_x_map[i]*distort + x
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if xv < xmin then xmin = xv end
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if xv > xmax then xmax = xv end
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noise_x_map[i] = xv
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local zv = noise_z_map[i]*distort + z
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if zv < zmin then zmin = zv end
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if zv > zmax then zmax = zv end
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noise_z_map[i] = zv
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end
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i2d = i2d-chulens.x
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end
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end
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local pminp = {x=math.floor(xmin), z=math.floor(zmin)}
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local pmaxp = {x=math.floor(xmax)+1, z=math.floor(zmax)+1}
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incr = pmaxp.x-pminp.x+1
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i_origin = 1 - pminp.z*incr - pminp.x
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terrain_map, lake_map = heightmaps(pminp, pmaxp)
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else
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terrain_map, lake_map = heightmaps(minp, maxp)
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end
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local c_stone = minetest.get_content_id("default:stone")
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local c_dirt = minetest.get_content_id("default:dirt")
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@ -119,20 +130,29 @@ local function generate(minp, maxp, seed)
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local ivm = a:index(x, minp.y, z)
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local ground_above = false
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local temperature = noise_heat_map[i2d]+noise_heat_blend_map[i2d]
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local terrain, lake
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if not use_distort then
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terrain = terrain_map[i2d]
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lake = lake_map[i2d]
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end
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for y = maxp.y+1, minp.y, -1 do
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local xn = noise_x_map[nid]
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local zn = noise_z_map[nid]
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local x0 = math.floor(xn)
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local z0 = math.floor(zn)
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if use_distort then
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local xn = noise_x_map[nid]
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local zn = noise_z_map[nid]
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local x0 = math.floor(xn)
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local z0 = math.floor(zn)
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local i0 = i_origin + z0*incr + x0
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local i1 = i0+1
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local i2 = i1+incr
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local i3 = i2-1
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local i0 = i_origin + z0*incr + x0
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local i1 = i0+1
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local i2 = i1+incr
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local i3 = i2-1
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terrain = interp(terrain_map[i0], terrain_map[i1], terrain_map[i2], terrain_map[i3], xn-x0, zn-z0)
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lake = math.min(lake_map[i0], lake_map[i1], lake_map[i2], lake_map[i3])
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end
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local terrain = interp(terrain_map[i0], terrain_map[i1], terrain_map[i2], terrain_map[i3], xn-x0, zn-z0)
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if y <= maxp.y then
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local lake = math.min(lake_map[i0], lake_map[i1], lake_map[i2], lake_map[i3])
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local is_lake = lake > terrain
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local ivm = a:index(x, y, z)
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@ -166,12 +186,20 @@ local function generate(minp, maxp, seed)
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ground_above = y <= terrain
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ivm = ivm + ystride
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nid = nid + incrY
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if use_distort then
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nid = nid + incrY
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end
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end
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if use_distort then
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nid = nid + incrX
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end
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nid = nid + incrX
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i2d = i2d + 1
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end
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nid = nid + incrZ
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if use_distort then
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nid = nid + incrZ
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end
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end
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vm:set_data(data)
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@ -47,7 +47,7 @@ mapgen_rivers.sea_level = get_settings('sea_level', 'int', 1)
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mapgen_rivers.min_catchment = get_settings('min_catchment', 'float', 25)
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mapgen_rivers.max_catchment = get_settings('max_catchment', 'float', 40000)
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mapgen_rivers.riverbed_slope = get_settings('riverbed_slope', 'float', 0.4) * mapgen_rivers.blocksize
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--mapgen_rivers.distort = get_settings('distort', 'bool', true) To be implemented: should be possible to disable distorsion
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mapgen_rivers.distort = get_settings('distort', 'bool', true)
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mapgen_rivers.glaciers = get_settings('glaciers', 'bool', true)
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mapgen_rivers.glacier_factor = get_settings('glacier_factor', 'float', 8)
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mapgen_rivers.elevation_chill = get_settings('elevation_chill', 'float', 0.25)
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